Relevant bibliographies by topics / Granitoïde

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Academic literature on the topic 'Granitoïde'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Granitoïde"

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LaFlamme, Crystal, Christopher R. M. McFarlane, and David Corrigan. "Neoarchean Mantle-derived Magmatism within the Repulse Bay Block, Melville Peninsula, Nunavut: Implications for Archean Crustal Extraction and Cratonization." Geoscience Canada 42, no. 3 (2015): 305. http://dx.doi.org/10.12789/geocanj.2015.42.065.

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SUMMARYThe Repulse Bay block (RBb) of the southern Melville Peninsula, Nunavut, lies within the Rae craton and exposes a large (50,000 km2) area of middle to lower crust. The block is composed of ca. 2.86 Ga and 2.73–2.71 Ga tonalite-trondhjemite-granodiorite (TTG) and granitic gneiss that was derived from an older 3.25 and 3.10 Ga crustal substrate. This period of crustal generation was followed by the emplacement of ca. 2.69–2.66 Ga enderbite, charnockite, and granitoid intrusions with entrained websterite xenoliths. These voluminous batholith-scale bodies (dehydrated and hydrated intrusions), and the associated websterite xenoliths, have similar whole rock geochemical properties, including fractionated light rare earth element (LREE)–heavy (H)REE whole rock patterns and negative Nb, Ti, and Ta anomalies. Dehydrated intrusions and websterite xenoliths also contain similar mineralogy (two pyroxene, biotite, interstitial amphibole) and similar pyroxene trace element compositions. Based on geochemical and mineralogical properties, the two lithologies are interpreted to be related by fractional crystallization, and to be the product of a magmatic cumulate processes. Reworking of the crust in a ca. 2.72 Ga subduction zone setting was followed by ca. 2.69 Ga upwelling of the asthenospheric mantle and the intrusion of massif-type granitoid plutons. Based on a dramatic increase in FeO, Zr, Hf, and LREE content of the most evolved granitoid components from the 2.69–2.66 Ga cumulate intrusion, we propose that those granitoid plutons were in part derived from a metasomatized mantle source enriched by fluids from the subducting oceanic slab that underwent further hybridization (via assimilation) with the crust. Large-scale, mantle-derived Neoarchean sanukitoid-type magmatism played a role in the development of a depleted lower crust and residual sub-continental lithospheric mantle, a crucial element in the preservation of the RBb.RÉSUMÉLe bloc de Repulse Bay (RBb) dans le sud de la péninsule de Melville, au Nunavut, est situé dans le craton de Rae et expose une large zone (50 000 km2) de croûte moyenne à inférieur. Ce bloc est composé de tonalite-trondhjémite-granodiorite (TTG) daté à ca. 2,86 Ga et 2,73–2,71 Ga, et de gneiss granitique dérivé d’un substrat crustal plus ancien daté à 3,25 Ga et 3,10 Ga. Cette période de croissance crustale a été suivie par la mise en place entre ca. 2,69 et 2,66 Ga d’intrusions d’enderbite, charnockite et de granitoïde incluant des xénolites d’entraînement de websterite. Ces intrusions de taille batholitique (intrusions déshydratées et hydratées) ainsi que les xénolites d’entraînement de websterite associés, ont des propriétés géochimiques sur roche totale semblables notamment leurs profils de fractionnement des terres rares légers (LREE) et des terres rares lourds (HREE) ainsi que leurs anomalies négatives en Nb, Ti et Ta. Les intrusions déshydratées et les xénolites de websterite ont aussi des minéralogies similaires (deux pyroxènes, biotite, amphibole interstitielle) ainsi que des compositions semblables en éléments traces de leurs pyroxènes. Étant donné leurs propriétés géochimiques et minéralogiques, ces deux lithologies sont interprétées comme provenant d’une cristallisation fractionnée, et comme étant le produit de processus d'accumulations magmatiques. Le remaniement de la croûte dans un contexte de subduction vers ca. 2,72 Ga, a été suivi vers ca. 2,69 Ga d’une remontée du manteau asthénosphérique et de l’intrusion de granitoïdes de type massif. D'après l’importante augmentation en FeO, Zr, Hf et LREE dans les granitoïdes les plus évolués du magmatisme ayant pris place entre ca. 2,69 Ga et 2,66 Ga, nous proposons que ces plutons aient été en partie dérivés d’une source mantélique métasomatisée enrichies par des fluides d’une plaque océanique en subduction et qui a subi une hybridation supplémentaire (par assimilation) avec la croûte. Le magmatisme néo-archéen de type sanukitoïde, dérivé du manteau et de grande échelle, a joué un rôle dans le développement d’une croûte inférieure et d’un manteau lithosphérique continental résiduel appauvri, un élément déterminant pour la préservation du RBb.
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Najili, Ahmad, Purnama Sendjaja, Bambang Priadi, Verry Edi Setiawan, and Barry Majeed Hartono. "Petrogenesis of Pre-Tertiary A-Type Granitoid in Jambi Area and its Implications of Rare Earth Element Potential on Main Range Sumatra Belt." Indonesian Journal of Economic Geology 1, no. 1 (2021): 49–71. http://dx.doi.org/10.51835/ijeg.2021.1.1.342.

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Granitoid rocks are one of the main sources of rare earth elements (REE). This makes granitoid characterization become important in the early stages of REE exploration. Almost all granitoids in Indonesia have been mapped. However, more detailed granitoid studies in Indonesia are still focused on Bangka and Belitung granites (tin belt granite). In contrast to Bangka and Belitung granites, studies related to petrogenesis and granite characteristics on the mainland of Sumatra Island (Sumatra Main Range) are rarely done, such as granitoid in Jambi area. The aim of this study is to determine the characteristics of the Pre-Tertiary granitoids located in the Tigapuluh and Duabelas Mountains, Jambi. The Tanjungjabung Barat granitoid represent the Tigapuluh Mountains area while the Sarolangun granitoid represent the Duabelas Mountains area. These two granitoids interpreted to be Triassic to Jurassic in age. Granitoid characteristics include petrological and geochemical characters. This study also focuses on the petrogenesis of Pre-Tertiary granitoid and its implications for the abundance of REEs. Megascopic observation, petrographic, and geochemical analysis are done in this study. Geochemical analysis was done at the Center of Geological Survey Laboratory, Bandung using the ICP-MS Thermo Icap-Q and XRF ADVANT XP Thermo ARL9900 instruments. Based on megascopic and petrographic observations, both of the granitoids are classified as granite. Geochemically, these two granitoids show the character of A-type granite which is formed in the post-collision environment, and derived from the crustal melting with ferrous alkalic to alkali-calcic peraluminous affinities. This crustal melting happened due to the collision of the Sibumasu Block with Indochina resulting in crustal thickening and crustal melting. The magma then contaminated effectively in the rift environment due to the subduction roll-back of Meso-Tethys in the Late Triassic. Subduction in the West Sumatra also play roles in the genesis and it is shown by the geochemical character of the Sarolangun granitoid. Effective contamination derives the characteristics of A-type granite so that the REE content in both granites are abundant. The abundance of REE is indicated by the presence of the allanite, monazite, apatite, zircon, and titanite. The REE concentration of the Sarolangun granitoid reaches 330 ppm, while the Tanjungjabung Barat granitoid reaches 261 ppm. The REE concentrations of A-type granitoid in Jambi then compared with A-type granitoids from the world and showed relatively the same REE concentrations. The REE concentrations of these granitoids are also higher than the other type granitoids in Indonesia. However, the REE concentrations of Jambi granitoids are similar to the fractionated S-type granite in Bangka. With a recent study showing the presence of A-type granitoid in Sarudik (North Sumatra) and Bukit Batu (South Sumatra), the A-type granitoid in this study indicates the existence of A-type granitoid belt in the Sumatra Main Range. This belt will have a high abundance of REE concentrations and potentially become the source for REE deposits. The author hopes that this study could improve the understanding of tectonic in Sumatra and suggestion for REE exploration in the area.
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Dey, Sukanta, Sibani Kumari Nayak, Aniruddha Mitra, Keqing Zong, and Yongsheng Liu. "Mechanism of Paleoarchean continental crust formation as archived in granitoids from the northern part of Singhbhum Craton, eastern India." Geological Society, London, Special Publications 489, no. 1 (2020): 189–214. http://dx.doi.org/10.1144/sp489-2019-202.

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AbstractMany Paleoarchean cratons display a gradual change from early sodic tonalite–trondhjemite–granodiorite magmatism to late K-rich granitoid magmatism; the geodynamic significance of this change is debatable though. This contribution presents field, geochemical and zircon U–Pb age and Hf isotope results of four different 3.32–3.25 Ga granitoid bodies from the northern part of Singhbhum Craton to investigate their petrogenesis and role in crustal evolution. The granitoids range in composition from tonalites to trondhjemites, derived from intracrustal melting at low- to medium-pressure conditions. The source was mainly low-K mafic rock. The granitoids show intrasuite fractional crystallization. These sodic granitoids represent the last stage of granitoid magmatism in the Singhbhum Craton which formed contemporaneously with K-rich granitoids occurring in other parts of the craton. This fact suggests that, contrary to the popular notion (of only potassic granitoids), both sodic and potassic granitoids could form at the terminal phase of cratonization, implying reworking of heterogeneous (mafic to tonalite) crust. A combination of evidence from geochemical data, secular change in granitoid composition, structural pattern and rock association of the Singhbhum Craton reflects that recurring mantle plume-related mafic–ultramafic magma emplacement in an oceanic plateau setting and attendant crustal melting can explain the Paleoarchean crustal evolution pattern.
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K. Agbenyezi, Theophilus, Gordon Foli, and Simon K. Y. Gawu. "GEOCHEMICAL CHARACTERISTICS OF GOLD-BEARING GRANITOIDS AT AYANFURI IN THE KUMASI BASIN, SOUTHWESTERN GHANA: IMPLICATIONS FOR THE OROGENIC RELATED GOLD SYSTEMS." Earth Science Malaysia 4, no. 2 (2020): 127–34. http://dx.doi.org/10.26480/esmy.02.2020.127.134.

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This study investigates auriferous granitoids from the Esuajah and Fobinso pits within the Ayanfuri environment in the Paleoproterozoic Kumasi basin. The aim is to establish the geochemical characteristics of the granitoid gold ores and the possible deposit type which may influence mineral project development. 13 major and 51 trace elements were analyzed using XRF and ICP-MS devices, respectively. The granitoids are mainly classified as granodiorite that crystallized from a calc-alkaline magma series. The Fobinso granodiorite derived from the partial melting of the Birimian metasedimentary rocks, while the Esuajah granitoid derived from igneous rock melts. The granitoid are linked to magma source depleted in mantle material that contains crustal components through subduction processes. Major oxides of the granitoid vary lowly from the average background values derived for basin type granitoid in such terrains. Generally, the granitoid are enriched in Large Ion Lithophile Elements (LILE), while High Field Strength Elements (HFSE) and base metals are within background values when compared to Primitive Mantle (PM) values. Gold mineralisation is associated with Ag, As, Bi, Sb, Te, Pb and S in the peraluminous granitoids. Geochemical characteristics and field observations identify the deposit style as an orogenic related gold deposit type.
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Halla, Jaana. "Highlights on Geochemical Changes in Archaean Granitoids and Their Implications for Early Earth Geodynamics." Geosciences 8, no. 9 (2018): 353. http://dx.doi.org/10.3390/geosciences8090353.

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The Archaean (4.0–2.5 Ga) continental crust is mainly composed of granitoids, whose geochemical characteristics are a function of their formation mechanisms and components, as well as physical conditions of their source. Therefore, revealing changes in Archaean geodynamic processes requires understanding of geochemical changes in Archaean granitoids. This paper compares key geochemical signatures in granitoid occurrences from the Eoarchaean to Neoarchaean Eras and aims to highlight changes or variations in their geochemical signatures. The study is performed by exploring and comparing geochemical and geochronological datasets of Archaean granitoids compiled from literature. The results show that two end-members of sodic TTGs (tonalite–trondhjemite–granodiorite) occur throughout the Archaean: low- and high-HREE (heavy rare earth elements) types. A profound change in granitoid geochemistry occurred between 3.0 and 2.5 Ga when multi-source high-K calc-alkaline granitoid batholiths emerged, possibly indicating the onset of modern-type plate tectonics.
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Bahajroy, Mojtaba, and Saeed Taki. "Study of the mineralization potential of the intrusives around Valis (Tarom-Iran)." Earth Sciences Research Journal 18, no. 2 (2015): 123–29. http://dx.doi.org/10.15446/esrj.v18n2.44799.

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<p>The study area is located in northwestern Iran in the central Iran zone, specifically the western Alborz sub-zone south of the Tarom-Hashtjin metallogenic zone. The exposed rock units in this area generally include Eocene volcanic rocks (lava flows and pyroclasts belonging to the Karaj formation) and Oligocene granitoid intrusive bodies. The intrusive bodies in the area have a petrographic composition of granite, syenite and monzonite and are mostly metaluminous. The dual characteristics of these intrusives (for example, the behavior of elements such as Rb, P, Ga/Al, Y/Nb, K/Na, and FeO/Fe2O3, the Rb/Nb ratios, the A/CNK molar ratios and the ACF and A/CNK-Fe2O3+FeO diagrams), some of which are consistent with the I nature and others with the S and A natures, show that the rocks are among hybrid granitoids and, in terms of the tectonic setting, lie within the WPG range. According to the Rb/Sr, Zr/Hf, K/Rb ratios, the granite melts that form the aforementioned bodies are not extremely evolved and have not undergone post magmatic activity, which would lead to mineralization. The Sm/Eu and Rb/Ba ratios and the behavior of Rb, Ba and Sr within the aforementioned granitoids show that the rocks are similar to average granitoids unrelated to Li, Be, Sn, W and Ta deposits; they fall within the range of barren granitoids but are partially fertile in Cu.</p><p> </p><p><strong>Resumen</strong></p><p>El área de este estudio está localizada en el noroeste de la zona central de Irán, específicamente en el oeste de la subzona de Alborz y al sur de la zona metalogénica de Tarom-Hashtjin. Las unidades de roca expuesta en esta área se clasifican generalmente como rocas volcánicas del Eoceno (flujos de lava y piroclastos pertenecientes a la formación Karaj) y como cuerpos granitoides intrusivos del Oligoceno. Los cuerpos intrusivos en el área tienen una composición petrográfica de granito, sienita y monzonita mayormente metaluminosa. Las características duales de estas intrusiones (por ejemplo, el comportamiento de de elementos como Rb, P, Ga/ Al, Y/Nb, K/Na, y Feo/Fe2O3, los índice de Rb/Nb, la proporción molar de los A/CNK y los diagramas ACF y A/CNK-Fe2O3+FeO), algunas de las cuales son consistentes con la índole I y otras con las índoles S y A, muestran que las rocas son granitoides híbridos y, en términos de orden tectónico, subyacen en la cadena WPG. De acuerdo con los índices Rb/Sr, Zr/Hf, K/Rb, los granitos fundieron la forma de los cuerpos sin desarrollarse completamente y sin registrar actividad magmática posterior, lo que llevó a la mineralización. Los índices Sm/Eu y Rb/Ba y el comportamiento del Rb, Ba y Sr al interior de los granitoides mencionados muestran que las rocas son similares al promedio de los granitoides no relacionados con los depósitos de Li, Be, Sn, W y Ta; estos incluyen en el rango de granitoides estériles, pero son parcialemente fértiles en Cu.</p><p><strong><br /></strong></p>
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Nguyen, Chien Dong, Hong Son Duong, Dinh Cong Bui, Huu Hieu Ho, and Thi Hoang Linh Nguyen. "Relations between phia oac granitoids and uranium in Nguyen Binh area - Cao Bang province." Nuclear Science and Technology 3, no. 4 (2013): 40–48. http://dx.doi.org/10.53747/nst.v3i4.326.

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After reviewing the trace metals (Sn, W, Mo)-bearing granitoid deposits in the world, theauthors recognized that some deposits in Sweden (e.g. Nozzboten, Vasterbotten, Hotagen, Bergslagen, Bohus, Gosthenburg, Gotemar, Blekinge) contain not only trace metals (Sn, W, Mo), but also F, Li, U,Th, etc… which are similar to the Phia Oac granitoids. The correlation chart with the T. Carlsson (1982)’s criteria helps to determine the uranium-bearing granitoids. Initially, we constructed some correlation charts of granitoid fields in Northern Vietnam and concluded that some granitoid fields certainly related to uranium are Phia Oac, Xom Giau, Phu Sa Phin, and some granitoid fields possibly related to uranium are Ye Yen Sun, Muong Lat, Ban Chieng, and Song Chay (based on data from the Geology of Vietnam, Part II, Magma Section). This issue needs to be further studied.
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Yamashita, Katsuyuki, Robert A. Creaser, James U. Stemler, and Tony W. Zimaro. "Geochemical and Nd-Pb isotopic systematics of late Archean granitoids, southwestern Slave Province, Canada: constraints for granitoid origin and crustal isotopic structure." Canadian Journal of Earth Sciences 36, no. 7 (1999): 1131–47. http://dx.doi.org/10.1139/e98-047.

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New geochemical and Nd-Pb isotopic data for ~ 2.62-2.59 Ga granitoids from the southwest Slave Province are used to determine the source(s) of granitoid magmas, to evaluate the role of pre-2.8 Ga basement during this magmatism, and to refine the existing Nd-Pb isotopic structure of the western Slave Province. The Pb isotopic data require crust older than ~3.2 Ga as a granitoid protolith, whereas the Nd isotopic data require input from juvenile crustal material. This discrepancy is explained if the granitoid protoliths are mixtures of ancient basement and ~2.7 Ga juvenile crust in varying proportions. Specifically, granitoids from the southwestern Slave Province require 10-30% basement, whereas granitoids from other parts of the western Slave Province require >50%. Incorporation of basement as a protolith may be achieved indirectly, by assimilation of basement during juvenile ~2.7 Ga magmatism, or directly during ~2.62-2.59 Ga magmatism. The granitoid isotopic data suggest that indirect basement input was important on a regional scale, but direct input may have also taken place in some areas of the western Slave Province, particularly along the ~111°W "isotopic boundary" zone previously recognized. The geochemical characteristics of these granitoids are compatible with an origin by partial melting of dominantly amphibolite and metasedimentary rocks to produce the ~2.61 Ga and ~2.59 Ga magmatism, respectively; partial melting occurred in response to regional crustal thickening at this time.
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Boyadjiev, Stefan. "Comparative petrologic-geochemical eharacterization of the Pre-Mesozoic granitoids of the Sredna Gora zone." Geologica Balcanica 21, no. 3 (1991): 35–74. http://dx.doi.org/10.52321/geolbalc.21.3.35.

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Pre-Hercynian (Late Proterozoic!) and Hercynian (South Bulgarian) types of granitoids are described. Grounds are given for their palingenetic origin and crustal level of magma generation. On the basis of the analysis performed, the South Bulgarian granitoids are determined as a bimodal superformation, respectively presented by: a) Formation of basic and ultrabasic rocks of a probable Precambrian age- mainly embedded in single layers among the Precambrian crystalline complex; regarding them as a single gabbro-granite formation is not grounded. b) Formation of the batholitic granitoid complex which is distinguished for its polyphase-polyfacies structure. It is presented by three temporarily and laterally defined granitoid phases (impulses): first - marginal facies built by contaminated (a result of assimilation of basic and ultrabasic rocks) rocks which are gradually and centripetally transformed into granitoids up to granites; second – predominantly medium- up to coarse-grained, porphyroid biotite to two-mica granites, partially to granodiorite; third – medium-grained, predominantly biotite to two-mica granites, rarely granodiorites. On the basis of the relationships presented and on the basis of geochemical criteria as well, the development of a fourth granitoid phase - aplite-pegmatoid biotite to two-mica subalkaline granites to leucogranites of not elucidated, probably Alpine age - is grounded. The granitoids are referred·to the K-Na series. They are characterized by a very high aluminity, weak ferreous and magnesium properties, which determine the low content of mafites and the strongly expressed leuco-rate frequency of rocks. Ba, B, Pb, Th have contents above the clarke, while the other elements studied have contents about or under the clarke; the granitoids of fourth phase are enriched in So, W, Mo, Ag which determines their metallogenic specialization. They are characterized by a deficiency of REE, Eu and a negative europium anomaly; in the fourth granitoid phase REE is two times higher. A complete petrologic and phase-facies analogy is established between the pre-Mezozoic granitoids from the Sredna Gora zone and from the Rhodope Massif.
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Luchitskaya, М. V., М. V. Gertseva, and I. V. Sysoyev. "Geodynamics and Early Cretaceous Magmatism of the Northern Volcanic-Plutonic Belt of Verkhoyan-Kolyma Fold Area (Northeastern Russia)." Геотектоника, no. 5 (September 1, 2023): 96–120. http://dx.doi.org/10.31857/s0016853x23050053.

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New data on the geological position, U‒Pb SIMS zircon ages, petro-geochemical features, Sr‒Nd isotopic composition and geodynamic setting of the granitoids and volcanites of the Northern volcanic-plutonic belt, Verkhoyan-Kolyma fold area, are presented. Magmatites of the belt include granitoids of Elikchan, Kuranakh, Bakyn plutons, composed of elikchansky granite-granodiorite complex, and volcanites of predominantly intermediate-felsic Tumusskaya sequence with subvolcanic bodies of the same composition. They form single Early Cretaceous (127–121 Ma) volcanic-plutonic assemblage. Granitoid plutons are elongated in sub-latitudinal-northwestern direction and are discordant to main fold and thrust structures. Granitoids intrude and metamorphose Jurassic terrigenous and Early Cretaceous volcanites of Tumusskaya sequence and are cut by younger Late Cretaceous subvolcanic bodies. Granitoids of Bakyn, Elikchan and Kuranakh plutons combine petro-geochemical features of I-, S- and A-type granites. Such diversity of petro-geochemical granitoid types as well as interrelations of major (\({\text{F}}{{{\text{e}}}_{{\text{2}}}}{\text{O}}_{3}^{{{\text{tot}}}}\)–TiO2–MgO) and rare (Ba/La–Nb × 5–Yb × 10) elements in granitoids and the same age volcanites of Tumusskaya sequence allow to refer them to magmatites of transform margin or plates translation boundaries. Collision between Chukotka microcontinent and Siberian continent with earlier accreted Kolyma-Omolon microcontinent in Barremian-Aptian time changed to post-collisional extension and formation of volcanic-plutonic assemblage of the Northern volcanic-plutonic belt. Post-collisional extension took place in the regime of plates translation boundaries. Sr–Nd isotopic characteristics of granitoids of all plutons indicate the interrelation of mantle and crustal sources of granitoid melts in this process.
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Dissertations / Theses on the topic "Granitoïde"

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Yao, Kouakou Fulgence Eric. "Albitisation et oxydation des roches granitoïdes en relation avec la paléosurface triasique des Sudètes (SW Pologne)." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://pastel.archives-ouvertes.fr/pastel-00971314.

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De vastes surfaces et volumes de socle granito-gneissique sont albitisés sur toute la chaîne hercynienne de l'Afrique du Nord à la Scandinavie. L'interprétation supergène de ces faciès a déjà avancée par le passé. La question supergène/endogène doit être établie de façon indubitable avant de pouvoir aller plus avant dans le sujet. Démontrer que les faciès albitisés sont d'origine supergène et liés à la paléosurface triasique renouvelle profondément les idées sur l'évolution des socles hercyniens. La connaissance de la paléosurface triasique sur de vastes régions de socle de l'Ouest de l'Europe fournira un repère spatio-temporel qui permettra de contraindre les taux d'ablation des massifs depuis le Trias. Elle sera une contribution majeure à la modélisation de la géodynamique de ces régions. Cette albitisation s'accompgne d'une "carbonatation" du Ca des feldspathes plagioclases. Elle intervient donc dans le stockage du CO2 pendant le Trias et ceci de manière significative, eu égard du volume des roches affectées. En toile de fond est aussi posée la question de la spécificité sodique de cette paléoaltération, en rechercher l'origine, la relier à la gigantesque accumulation de chlorure de sodium pendant le Permo-Trias, ... est-ce la marque d'un évènement global ?
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Yao, Kouakou Fulgence Eric. "Albitisation et oxydation des roches granitoïdes en relation avec la paléosurface triasique des Sudètes (SW Pologne)." Electronic Thesis or Diss., Paris, ENMP, 2013. http://www.theses.fr/2013ENMP0069.

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De vastes surfaces et volumes de socle granito-gneissique sont albitisés sur toute la chaîne hercynienne de l'Afrique du Nord à la Scandinavie. L'interprétation supergène de ces faciès a déjà avancée par le passé. La question supergène/endogène doit être établie de façon indubitable avant de pouvoir aller plus avant dans le sujet. Démontrer que les faciès albitisés sont d'origine supergène et liés à la paléosurface triasique renouvelle profondément les idées sur l'évolution des socles hercyniens. La connaissance de la paléosurface triasique sur de vastes régions de socle de l'Ouest de l'Europe fournira un repère spatio-temporel qui permettra de contraindre les taux d'ablation des massifs depuis le Trias. Elle sera une contribution majeure à la modélisation de la géodynamique de ces régions. Cette albitisation s'accompgne d'une "carbonatation" du Ca des feldspathes plagioclases. Elle intervient donc dans le stockage du CO2 pendant le Trias et ceci de manière significative, eu égard du volume des roches affectées. En toile de fond est aussi posée la question de la spécificité sodique de cette paléoaltération, en rechercher l'origine, la relier à la gigantesque accumulation de chlorure de sodium pendant le Permo-Trias, ... est-ce la marque d'un évènement global ?<br>Wide surfaces and huge volumes of granito-gneissic basements of the Hercynian massifs are albitized from North-Africa up to Scandinavia. The supergenic origin of these facies has already been forwarded in the past. The supergenic/endogenic question has to be substantiated beyond doubt before going further in this subject. Demonstrating that the albitized facies are of supergenic origin and bound to the Triassic palaeosurface renews deeply the ideas about the evolution of the Hercynian basements. The recognition of the Triassic palaeosurface on wide basement areas of western Europa will provide a spatio-temporal bench marks to constrain the ablation of these massifs since the Trias. This will be a major contribution to the geodynamic modelling of these areas. This albitization comes with a "carbonation" of the Ca from the plagioclase feldspars. In this manner, albitisation plays a significant rule in the CO2 storage during the Trias, with regard to the giant volume of rocks in consideration. Furthermore, in the backdrop arises the questions of the specificity of this sodium-rich paleoaweathering features, find out their origin, and bound them to the giant sodium chloride accumulation during the Permo-Triassic times… is this the record of a global event ?
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Elliot, Brent A. "The petrogenesis of the 1.88-1.87 Ga post-kinematic granitoids of the central Finland granitoid complex." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/geolo/vk/elliott/.

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Billur, Basak. "Geology And Petrology Of Beypazari Granitoids: Yassikaya Sector." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605577/index.pdf.

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Beypazari Granitoid is a low temperature and shallow-seated batholite intruded the Tepek&ouml<br>y metamorphic rocks of the Central Sakarya Terrane. Composition of the granitoid varies from granite to diorite. The granitoid is unconformably overlain by Palaeocene and Eocene rock units. Thus the age is probably Late Cretaceous. The Beypazari Granitoid comprises mafic microgranular enclaves. The granitoid mainly consists of quartz, plagioclase, orthoclase and minor amphibole, biotite, chlorite, zircon, sphene, apatite, and opaque minerals. Plagioclase shows sericitation whereas biotite and hornblende, chloritization. Holocrystalline and hypidiomorphic are characteristic textures of the granitoid. Geochemically, the Beypazari Granitoid is calc-alkaline, metaluminous and I-type. REE data indicate that it may have been generated from a source similar to the upper continental crust. The trace element data of the Beypazari Granitoid suggest a volcanic arc tectonic setting. The possible mechanism of Beypazari granitoid is the northdipping subduction of Neo-Tethyan northern branch under Sakarya continent during Late Cretaceous. The Beypazari Granitoid may be related with Galatean volcanic arc granitoids.
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Be, Mezeme Eugène. "Contribution de la géochronologie U-Th-Pb sur monazite à la compréhension de la fusion crustale dans la chaîne varisque française et implication géodynamique." Phd thesis, Université d'Orléans, 2005. http://tel.archives-ouvertes.fr/tel-00011558.

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La chaîne hercynienne française résulte de la collision continentale entre le Gondwana au Sud et la Laurussia au Nord. Le Massif Central constitue un fragment méridional de la chaîne dans lequel l'agencement structural indique un développement polycyclique. La lithologie est composée de micaschistes de l'Unité Para-autochtone, de Gneiss para et orthodérivés de l'Unité Inférieure, des Gneiss de l'Unité Supérieure et l'Unité de Thiviers-Payzac composée de métagrauwacke, de rhyolites et de quartzite. La chaîne comporte des migmatites et des granitoïdes qui ont été datés par la méthode de datation ponctuelle de monazite à la sonde électronique pour situer l'anatexie dans son contexte dynamique. Le caractère ponctuel des datations (point de ~2 µm de diamètre) permet de mettre en évidence plusieurs événements enregistrés sur un grain unique et éviter les problèmes de mélange rencontrés avec d'autres méthodes de datation. Trois événements thermiques sont identifiés : un évènement entre 385 et 375 Ma, un autre autour de 330 et 325 Ma et un dernier vers 310 et 290 Ma. Ils sont contrôlés par l'épaississement et le des-épaississement crustal et des injections asthénosphériques.
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Stein, Eckardt. "Zur Platznahme von Granitoiden : vergleichende Fallstudien zu Gefügen und Platznahmemechanismen aus den White-Inyo Mountains, California, USA, und dem Bergsträßer Odenwald = On the emplacement of granitoids /." Stuttgart : Schweizerbart, 2000. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009177614&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Chabiron, Aliouka. "Les gisements d'uranium de la caldeira de Streltsovka (Transbaikalie, Russie)." Nancy 1, 1999. http://www.theses.fr/1999NAN10069.

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Les gisements d'u et mo de streltsovka (Russie), représentent les plus grandes ressources en u du monde associées a des volcanites (200000 tu). Les inclusions vitreuses des phénocristaux de quartz, ont permis de caractériser le magma rhyolitique avant tout phénomène d'altération. Il est per alcalin (1. 04 < (k+na)/al < 1. 10), riche en f (1. 4-2. 7%), pauvre en cl (0. 2%). Il est pauvre en h 2o (1. 9 0. 6%), riche en u (15-23 ppm), th (33-49 ppm). L'analyse des éléments traces et des terres rares a la microsonde ionique à montre qu'il est enrichi en y et nb, caractéristiques des magmas alcalins très fractionnés. En considérant 7 ppm d'u dans les rhyolites altérées et 17 ppm dans le magma initial, l'altération hydrothermale de 1 km 3 de rhyolite libère 26000 tu. Une efficacité de 25% du processus de dépôt d'u a partir des solutions hydrothermales ayant altère l'ensemble rhyolitique peut expliquer la totalité des réserves d'u des gisements. Dans le socle granitique, l'étude minéralogique et géochimique montre que les granodiorites, les granites porphyroïdes et les granites a biotite peuvent appartenir a une même suite magmatique subalcaline sodi-potassique. Le leuco granite profond montre une typologie alcaline du fait de ses teneurs élevées en sio 2 (75. 6-77. 2%), na 2o+k 2o (8. 4-8. 9%), nb (12-28 ppm), y (70-94 ppm), th (32-53 ppm), de ses faibles teneurs en ba (10-20 ppm), sr (6-16 ppm). L'altération hydrothermale très importante des granites subalcalins et alcalins de streltsovka montre que l'u, difficilement lessivable dans les minéraux accessoires, a été toutefois libéré. Un calcul de bilan de masse montre qu'1 km 3 de granite peut libérer 650 tu lors de l'altération de l'allanite. Cette estimation est minimale car le fluide oxydant ayant mobilise l'u de l'allanite a pu dissoudre les autres porteurs d'u éventuellement présents dans les granites, tels que l'uraninite.
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Ongen, Sinan. "Les échanges métasomatiques entre granitoïdes et encaissants particuliers (calcaires, dolomies, ultrabasites, séries manganésifères) : l’exemple de la péninsule de Biga, Anatolie nord-ouest, Turquie." Nancy 1, 1992. http://www.theses.fr/1992NAN10349.

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En Turquie-nw, trois localités types ont été sélectionnées afin de montrer la diversité des skarns bi-metasomatiques et les minéralisations qui leur sont respectivement associées: à Karakoy, entre la granodiorite du pluton d'Euciler et les horizons calcareux du groupe de Kazdag, nous observons les paragenèses du skarn calcique et des cornéennes qui mettent en évidence les conditions de formation du facies des cornéennes à pyroxène (600-600c, (1,5-2,0 kb). L'important dépôt de wollastonite s'est forme au-dessus de 500c en raison de la forte activité de si et de h#2o ainsi que d'un dégagement rapide de co#2. A Bakirlik Tepe, entre la monzonite du pluton de gurece et les olistostromes calcareux de la formation de Karakaya, nous observons un skarn à pyroxène à minéraux manganésifères et une minéralisation zincifère dans les conditions suivantes: tc<400c, fugacité élevée de l'oxygène, environnement enrichi en h#2o. A Derekoy, entre la monzonite et la dolomie de Kapakli (jurassique supérieur), nous observons un endoskarn à composition de monzonite à olivine et un skarn magnésien à forsterite fassaite, ainsi qu'une importante minéralisation de magnétite
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Zeinelabidin, Mohamed Saïd. "Étude pétrologique des granitoïdes du Damagaram (Sud, Niger)." Paris 11, 1987. http://www.theses.fr/1987PA112359.

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Cette thèse présente une étude pétrologique des granitoïdes du socle du Damagaram (S. Niger), situé dans un segment interne de la chaîne pan-africaine trans-saharienne, bordé par des mega-cisaillement N-S qui s’étende de l’Aïr au Niger dans de segment se sont mis en place au Phanérozoïque des complexes annulaires alcalins sursaturés en silice. Le premier chapitre est une introduction comportant un bref exposé du cadre géologique du Damagaram et une description des familles de granitoïdes et des relations entre elles. Le deuxième chapitre présente des descriptions pétrographiques de granitoïdes : 1- granites anatectiques de Birinin Kazoé. 2- granites à biotite et granites à amphibole et pyroxène de Tynza. 3- granites porphyroïdes à biotite et ses enclaves granodiorite. 4- granites à grains fins à biotite. 5- granites à deux micas. Le troisième chapitre est une étude minéralogique. La nature magnésienne et calcique de la paragènèse diopside-actinote-phiogopite du granite à amphibole et pyroxène est en accord avec une origine par contamination des gneiss calciques. Chaque faciès de la série calcoalcaline présente des biotites spécifiques contrôlées par le rapport Fe/Mg. Le cristallinité de la muscovite dans le granite à deux micas se prolonge en passant par les stades magmatiques, tardi-magmatique, post-magmatique. Le quatrième chapitre traite de l'aspect géochimique. Les granitoïdes appartiennent à une série calco-alcaline classique; série dont certains faciès ont subi une contamination crustale importante. Le cinquième chapitre résume les résultats géochronologiques obtenus en Rb/Sr par J. P. LIEGEOIS (MRAC-ULB) et les discute en tenant compte des résultats pétrographiques. Enfin la conclusion générale: les granitoïdes du socle de Damagaram sont tous d'âge pan-africain. En conteste avec ceux des Iforas proche du craton ouest-africain qui sont essentiellement d'origine mantellique (Ri 0,705), ceux du Damagaram montrent une variété d'interaction manteau-croûte (Ri 0,705-0,716) ce qui est confirmé par l'étude pétrographique.
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Centeno, Adrio Peixoto. "Os granitóides sintectônicos pós-colisionais Sanga do Areal, intrusivos no Complexo Arroio dos Ratos, na Região de Quitéria, RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/70407.

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Esta dissertação faz parte de um projeto que tem como objetivo investigar a origem e evolução do magmatismo de arco e pós-colisional do Escudo Sul-rio-grandense (ESRG), caracterizando a partir de estudos geoquímicos, estruturais e petrográficos os Granitóides Sanga do Areal (GSA), localizados na região de Quitéria, porção leste do Escudo Sul-rio-grandense. Estes granitóides consistem de dois corpos principais, alongados na direção NE-SW, com aproximadamente 14 km de extensão e 2 km de largura, e também de diversas intrusões menores, posicionadas, preferencialmente, na porção mediana de alta deformação cisalhante do Complexo Arroio dos Ratos. Estão em contato na porção NW com metatonalitos, metagranodioritos e gnaisses tonalíticos a dioríticos de idade paleoproterozóica do referido complexo e com horblenda-biotita granodioritos da unidade neoproterozóica Granodiorito Cruzeiro do Sul. Na porção SE o contato se dá com tonalitos a dioritos relacionados aos Granitóides Arroio Divisa de idade neoproterozóica. Os GSA são biotita monzogranitos de textura porfirítica em seu termo principal, com cerca de 30% de megacristais de até 5 cm de comprimento de plagioclásio e K-feldspato. A matriz heterogranular média a grossa é composta por quartzo fitado, feldspato parcialmente recristalizado e biotita. Subordinadamente, observam-se corpos de espessura centimétrica a métrica de biotita granodiorito equigranular médio, com fenocristais esparsos de feldspatos alinhados na foliação. Raramente ocorrem enclaves microgranulares máficos. A foliação milonítica é bem marcada pela orientação da biotita, dos megacristais lenticulares e do quartzo fitado e tem direção E-W, com alto ângulo de mergulho para N e para S, contendo lineação de estiramento direcional, com baixo caimento para W a SW. A foliação ígnea primária, concordante a sub-concordante com a foliação milonítica, tem ocorrência restrita e é marcada pela orientação dos megacristais não deformados e das lamelas de biotita. Estruturas S-C, caudas assimétricas em porfiroclastos de feldspatos, biotita fish e fitas assimétricas de quartzo são consistentes e indicam movimento transcorrente sinistral. Os Granitóides Sanga do Areal têm afinidade sub-alcalina médio a alto K, provavelmente toleítica, compatível com ambiente pós-colisional, onde foram deformados e controlados por zonas de cisalhamento transcorrente sub-verticais. Foi obtida uma idade U-Pb em zircão dos granitóides de 626,6±4,9 Ma (MSWD=2.2), coerente com as relações de campo.<br>This research investigates the evolution of arc to post-collisional magmatism in the Sul-rio-grandense Shield (ESGR), using geochemistry, structural and petrographic studies of the Sanga do Areal Granitoids (GSA). These granitoids are located in the Quitéria region, east of ESRG. The GSA form two main, NE-striking intrusions, and several other small ones, mainly within the shear zone croscutting the central portion of the Arroio dos Ratos Complex. The two main bodies are about 14 km long and 2 km wide. To the northwest, the GSA rocks are in contact with Paleoproterozoic metatonalites, metagranodiorites, tonalitic to dioritic gneisses of the Complex, and Neoproterozoic horblende-biotite granodiorites of the Cruzeiro do Sul unit. To the southeast, they are surrounded by tonalitic to dioritic rocks, related to the Neoproterozoic Arroio da Divisa Granitoids. The GSA rocks are composed mainly of porphyritic biotite monzogranites, with about 30% megacrysts of plagioclase and 5 cm long K-feldspar. The medium to coarse grained heterogranular groundmass is composed of microcrystalline ribbon quartz, partially re-crystallized feldspar and biotite. Medium-grained equigranular granodiorite occurs as centimeter to meter- thick bodies, with sparse feldspar megacrysts aligned on the foliation plane. Microgranular mafic enclaves are rarely observed within the GSA rocks. The mylonitic foliation is well-developed and marked by biotite, oriented lenticular megacrysts, as well as quartz ribbons. It strikes E-W and dips at high angles either N or S. The stretching lineation within the foliation shows shallow plunges, preferentially W-SW. A primary igneous foliation is sometimes observed, and it is concordant or sub-concordant with the mylonitic one, and marked by orientation of igneous megacrysts and biotite lamellae. S-C structures, asymetric tails in feldspar porphyroclasts, biotite fish, and asymetric quartz ribbons indicate transcurrent movement with consistent sinistral shear sense. The Sanga do Areal Granitoids show subalkaline medium- to high-K affinity, probably tholeiitic, and trace element composition consistent with sources related to post-collisional settings, which were deformed and controlled by E-NE and NE sub-vertical transcurrent shear zones. A U-Pb age in zircon grains from Sanga do Areal Granitoids of 626.6 ± 4.6Ma ((MSWD=2.2) was obtained and considered coherent with stratigraphic relations.
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Books on the topic "Granitoïde"

1

Clarke, D. Barrie. Granitoid rocks. Chapman & Hall, 1992.

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Matveevich, Shmakin Boris, та Institut geokhimii im. akademika A.P. Vinogradova., ред. Dokembriĭskie granitoidy Severo-Zapadnogo Prisai͡anʹi͡a. VO "Nauka", 1994.

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Veniaminovich, Fishman Mark, ed. Granitoidy i rudoobrazovanie: Poli͡a︡rnyĭ Ural. Izd-vo "Nauka," Leningradskoe otd-nie, 1985.

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P, Izokh Ė, ed. Granitoidy--indikatory glubinnogo stroenii͡a︡ zemnoĭ kory. Izd-vo "Nauka," Sibirskoe otd-nie, 1985.

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S, Bulkin I͡U. Rannedokembriĭskie granitoidy Belorusskoĭ anteklizy: Sostav, klassifikat͡sii͡a, proiskhozhdenie. Akademii͡a nauk Belarusi, In-t geologii, geokhimii i geofiziki, 1993.

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Öhlander, Björn. Proterozoic mineralizations associated with granitoids in northern Sweden. Sveriges geologiska undersökning, 1986.

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Granitoidy i metasomatity Vodlozerskogo bloka (I͡U︡go-Vostochnai͡a︡ Karelii͡a︡). Karelʹskiĭ filial AN SSSR, 1989.

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Klar, Andrzej. Stochastyczny model krystalizacji granitoidu karkonoskiego z rejonu Szklarskiej Poręby. Zakład Narodowy im. Ossolińskich, 1986.

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Granitoidy arkhei͡a I͡Ugo-vostochnoĭ chasti Baltiĭskogo shchita: (Karelʹskiĭ geoblok). Izd-vo "Nauka" Leningradskoe otd-nie, 1987.

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B, Kuznet︠s︡ov N., ред. Doordovikskie granitoidy Timano-Uralʹskogo regiona i ėvoli︠u︡t︠s︡ii︠a︡ protouralid-timanid. Geoprint, 2005.

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Book chapters on the topic "Granitoïde"

1

Bucher, Kurt, and Martin Frey. "Metamorphism of Granitoids." In Petrogenesis of Metamorphic Rocks. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-03000-4_10.

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Bucher, Kurt, and Martin Frey. "Metamorphism of Granitoid Rocks." In Petrogenesis of Metamorphic Rocks. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04914-3_10.

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Stevenson, David S. "Exoplanets, Granitoids and Evolutionary Potential." In Granite Skyscrapers. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91503-6_8.

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Hopper, S. D. "Floristics of Australian Granitoid Inselberg Vegetation." In Inselbergs. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59773-2_18.

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Wikarno, D. A. D. Suyatna, and S. Sukardi. "Granitoids of Sumatra and the Tin Islands." In Geology of Tin Deposits in Asia and the Pacific. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-72765-8_44.

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Dodge, Franklin C. W. "Granitoids of the central Sierra Nevada, California." In Tectonic Evolution of Northern California: Sausalito to Yosemite National Park, California, June 28–July 7, 1989. American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft108p0067.

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Okpoli, Cyril, Michael Oladunjoye, and Emilio Herrero-Bervera. "Characteristic Magnetic Behavior of Southwest Nigerian Granitoids." In Petrogenesis and Exploration of the Earth’s Interior. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01575-6_12.

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Abd El-Naby, Hamdy H. "The Egyptian Granitoids: an up-to-date Synopsis." In Regional Geology Reviews. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49771-2_9.

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Lidiak, E. G. "Evolution of Proterozoic Granitoids, Eastern Arbuckle Mountains, Oklahoma." In Proceedings of the International Conferences on Basement Tectonics. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5098-9_32.

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Petford, Nick. "Porous Media Flow in Granitoid Magmas: An Assessment." In Flow and Creep in the Solar System: Observations, Modeling and Theory. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-015-8206-3_17.

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Conference papers on the topic "Granitoïde"

1

Rais, Sayat, Maxat Kembayev, and Kanat Bulegenov. "GEOLOGY AND PROSPECTS OF THE SHU-ILE BELT GRANITOIDS AS BUILDING MATERIALS (SOUTH KAZAKHSTAN)." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023/1.1/s01.06.

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Granitoids are very developed and widespread geological formations on the territory of Kazakhstan. Many mineral deposits are associated with them, in addition, they themselves are useful minerals, like building materials. The Shu-Ile tectonic belt in Kazakhstan is a large region of the Paleozoic granitoid massif. Many deposits of gold, non-ferrous metals and rare earth elements are associated with them. One of them is the Jeltau leucogranites complex, with which most of the facing stone objects are associated. In the region, due to the increased mechanical strength of leucogranites, along with deluvial rubble material, coarse-grained eluvium and outcrops of bedrocks are widely developed. One of the most significant factors affecting the quality of the mined stone is the fracturing of the rocks, which determines the possibility of obtaining blocks, taking into account the consumer demand of the customer. Therefore, during the exploration of the Jeltau deposit, special attention was paid to the study of the actual disturbance of rocks at bedrock outcrops, including those in the immediate surroundings of the exploited block, in wells and an experimental quarry. In general, granites have stable physical and mechanical properties over the entire area of the site, uniform petrographic and chemical composition. According to the geological conditions of occurrence and morphology of the mineral body, the deposit is simple. The deposit is characterized by sustained quality of raw materials and simple structure.
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Trunilina, Vera. "VOLCANOGENIC FORMATION OF THE UYANDINO-YASACHNAYA MAGMATIC ARC IN THE MIDSTREAM OF THE INDIGIRKA RIVER (VERKHOYANSK-KOLYMA OROGENIC REGION)." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/1.1/s01.007.

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The Uyandino-Yasachnaya magmatic arc is the largest volcanic-plutonic belt in the north-east of Russia. However, there is yet to be a consensus on the nature of the arc, despite a long study of the rocks composing it. Most researchers consider it to be an island arc formation, however, some researchers also believe that it of a riftogenic or heterogeneous nature. The arc is composed of volcanogenic-sedimentary strata of variegated composition and associated subvolcanic formations. The rocks were formed during the Oxfordian-Volgian stage; their formation either preceded that of the Late Jurassic-Early Cretaceous granitoid massifs, or was synchronous with it. The research focused on volcanogenic and subvolcanic formations of the southeastern part of the arc in the midstream of the Indigirka River. The purpose of the research was to determine their composition and geodynamic conditions of formation. For this purpose, the study of the structure of volcanogenic strata and sub-volcanoes, their petrographic and chemical compositions, relations with granitoids was carried out. The volcanogenic strata within the territory are represented by two formations of rhyolite and their clastolavas: low-alkaline tholeiitic Oxfordian-Kimmeridgian formation and calcalkaline Medium Kimmeridgian � Early Volgian formation. The lower formation developed in the island-arc setting the upper formation developed under transitional conditions of the island-arc to the marginal-continental regime. The subvolcanic massifs have a dacite-rhyodacite composition; they intrude volcanogenic strata of both these suites and are metamorphosed near the contacts of the Early Cretaceous massifs. Their parental melt was produced at the boundary of amphibolite and dacite-tonalite substrates at maximum temperature (up to 1050oC) and pressure (up to 11.1 kbar). They are of Middle or Late Volga age and formed in the initial stages of the development of the active margin of the continent.
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Wang, Tao, Xiaoxia Wang, Ying Tong, et al. "Granitoid Source and Orogen Types." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2763.

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Shukowsky, Wladimir, Silvio R.F. Vlach, and Kellerman A. Novaes. "Gravity Signature of the Morungaba Granitoids." In 5th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.299.229.

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Gadeev, Ravil, Luidmila Skrinnik, Zamzagul Umarbekova, and Alexandr Tretyakov. "COLLISIONAL AND OROGENIC GRANITOIDS OF KAZAKHSTAN." In 20th SGEM International Multidisciplinary Scientific GeoConference Proceedings 2020. STEF92 Technology, 2020. http://dx.doi.org/10.5593/sgem2020/1.1/s01.006.

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Lee, Seung-Gu, Kyoungtae Ko, Kyo-Young Song, and Paul Hong. "Eu isotope fractionation in the granitoids derived from crustal material and granitoids derived from mantle material." In Goldschmidt2023. European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.17208.

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Gnanzou, Allou, Inza Coulibaly, Landry N'Da Kouame, Ouattara Gbele, and Alain Nicaise Kouamelan. "LITHOGEOCHEMICAL AND STRUCTURAL STUDY OF YAMOUSSOUKRO’ GRANITOIDS." In Goldschmidt2023. European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.18012.

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García-Arias, Marcos, Juan Sebastián Puerto-León, and Carlos Daniel Ronderos-Almeida. "Cordilleran Granitoids and Restite Entrainment: A Thermodynamic Modelling." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.797.

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Makovsky, Kyle A., Scott D. Samson, and David P. Moecher. "EVALUATING ZIRCON THERMOMETRY USING HIGH-ZR GRENVILLE GRANITOIDS." In 53rd Annual GSA Northeastern Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018ne-311275.

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Ducea, Mihai N., Constantin Balica, Constantin Balica, George Gehrels, and George Gehrels. "ZIRCON PETROCHRONOLOGY: GRANITOID MELTING CONDITIONS AND CONTINENTAL EVOLUTION." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-332845.

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Reports on the topic "Granitoïde"

1

Ruzicka, V. Filons associés à des granitoïdes. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/213741.

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Whalen, J. B., N. Wodicka, and G. D. Jackson. Geochemistry of granitoids. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2007. http://dx.doi.org/10.4095/223358.

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Whalen, J. B., and N. Wodicka. Geochemistry of granitoids. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2007. http://dx.doi.org/10.4095/223372.

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Ruzicka, V. Granitoid-associated veins. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/213724.

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Thomas, M. D. Magnetic and gravity models, northern half of the Taltson Magmatic Zone, Rae Craton, Northwest Territories: insights into upper crustal structure. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328244.

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A prominent magnetic low along an eastern portion of the Paleoproterozoic Taltson magmatic zone (TMZ) correlates mainly with the youngest granitoid in the zone, the peraluminous ca. 1936 Ma Konth granite. Flanking belts of higher magnetic intensity coincide mainly with slightly older Taltson plutonic rocks (e.g. ca. 1986 Ma Deskenatlata granodiorite, ca. 1955 Ma Slave granite) to the west and Neoarchean and/or Paleoproterozic gneisses of the Rae Craton to the east. A prominent gravity low along a portion of the northeastern margin of the TMZ correlates mainly with the Konth granite. Modelling of east-west magnetic and gravity profiles crossing the TMZ is used to investigate the geometrical and geological significance of these signatures. Modelling of the gravity low revealed a basin-like shape, with a maximum thickness of 14.9 km, for a composite unit of Konth-Slave magmatic suites. Magnetic modelling, the preferred technique north and south of the gravity minimum, yielded basin-like shapes for an essentially nonmagnetic Konth-Slave unit, but with much smaller maximum thicknesses of 5.0 and 6.5 km, respectively. Farther south in the TMZ, strongly magnetic units within mapped Konth and Slave granites preclude definition of a nonmagnetic Konth-Slave unit. Aside from the Slave unit, most other modelled magnetic units are generally steep and narrow and have fairly large magnetic susceptibilities. They are modelled to a depth of 6.2 km below sea level and have a steeply dipping, near-surface structural fabric extending to significant depth. Granitoids in the TMZ have previously been designated as ilmenite series or magnetite series, but modelled susceptibilities indicate that revisions to some designations may be required.
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Hill, J. D. Granitoid Plutons in the Canso area, Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120365.

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Struik, L. C., and P. Erdmer. Metasediments, Granitoids, and Shear Zones, southern Babine Lake, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/131369.

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Azadbakht, Z., N. Rogers, D. R. Lentz, and C. R. M. McFarlane. Petrogenesis and associated mineralization of Acadian related granitoids in New Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2019. http://dx.doi.org/10.4095/313658.

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Percival, J. A., V. Tschirhart, and W J Davis. Overview of the geology of the Montresor belt, Nunavut. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/332498.

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The Montresor belt, Nunavut, was originally described as a synform of Paleoproterozoicmetasedimentary rocks resting unconformably on Archean basement. Heterogeneous units of the lower Montresor group are imbricated with granitoid basement units. In the more homogeneous upper Montresor group, aeromagnetic patterns are interpreted to reflect distal polyphase deformation during the Trans-Hudson Orogeny, several phases of which have been recognized in the Montresor belt.
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Stewart, P. W. Geology and Genesis of Granitoid Clasts in the Maclean Extension Transported Orebody. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/122400.

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