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Artykuły w czasopismach na temat „Younger Granites”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Imeokparia, E. G. "Geochemical evolution of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria." Geological Magazine 122, no. 2 (1985): 163–73. http://dx.doi.org/10.1017/s0016756800031071.

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AbstractThe Jarawa Younger Granite complex is composed of high silica alkali granites that were emplaced 161 Ma ago. The granites are characterized by high contents of Rb, Li, F, Sn, Nb, W above normal low-Ca granitic rocks and have typical S-type characteristics that are indicative of a substantial component of crustal melt.Mineralization in the complex is associated with the biotite granite which was emplaced as a sheet-like body at relatively shallow depth and occurs as disseminations and as greisen lodes and veins.Chemical studies of the granites have shown that the biotite granite represe

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m ABU EL-LEIL ALI, Ibrahim, Abdellah Sadek TOLBA, Hamdy Ahmed Mohamed AWAD, Aleksey Valer’evich NASTAVKIN, Sayed Ahmed OMAR, and Mohamed Galal EL-FEKY. "Geological and geochemical studies on El-Missikat granites, Central Eastern Desert, Egypt." NEWS of the Ural State Mining University, no. 4 (December 20, 2020): 7–18. http://dx.doi.org/10.21440/2307-2091-2020-4-7-18.

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Objective. The present work deals with the detailed investigations of the geology, geochemistry, and tectonic setting of the studied granitic rocks. Research methods. This work involves both field work (Collection samples and drawing of a new geological map) and laboratory work (preparation of thin sections for petrographic studies by polarizing microscope), Atomic absorption, X-ray Fluorescence analysis (XRF) in the Central Laboratories of the Acme in Canada and Mass-Spectrometer with Inductively Coupled Plasma (ICPMS). Result. The study area restricted in the Central Eastern Desert of Egypt

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Abdel Hamid, Amr, Seddik Seddik, Mohamed Hassan, and Hicham Abdel Hamid. "Geology, Petrography, and Geochemistry of Younger Granites and Related Radioactive Pegmatite from Gabal El Urf Area, North Eastern Desert, Egypt: Implications for the Evolution of the NYF-Type Rare-Elements Granitic Pegmatite." Iraqi Geological Journal 56, no. 2E (2023): 1–18. http://dx.doi.org/10.46717/igj.56.2e.1ms-2023-11-6.

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Gabal El Urf region is located in the northern Egyptian Eastern Desert and overlain essentially by older and younger granitoids of Late Proterozoic age. These granitoids contain numerous outcrops of pegmatites, mostly occurring as dikes and veins or huge separated masses. In the contrary, pegmatites form lens-like bodies enclosed within the younger granites along their margins. Previous radiometric surveys showed anomalous concentrations of radioactivity on pegmatite body, located to the south of the study region. The younger granites and the associated radioactive pegmatite are studied in det

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Rashid, S. A., and S. M. Zainuddin. "The Lower Paleozoic Granitic Magmatism Near Ranikhet, Kumaun Himalaya: Major and Trace-Element Geochemistry and Tectonic Setting." Journal Geological Society of India 46, no. 1 (1995): 15–25. http://dx.doi.org/10.17491/jgsi/1995/460102.

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Abstract The Lower Paleozoic Ranikhet granitic rocks lie in between the tectonically active South and North Almora thrust zones and contain two types of granites: a Gneissose granite (GG) and a younger Porphyritic granite (PG). Both the phases show a good correlation in some of the major elements, whereas a wide scatter is observed in the trace-elemental abundances. These Ranikhet granites are Rb rich and Sr poor, they reveal peraluminous characteristics and correspond to the S-type granites. A syn-collisional tectonic environment for these granites is revealed by their Nb+Y and Rb concentrati

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El, Mezayen AM, Bakr MA Abu, HMY Sherif, Nahas HA El, and HH Ali. "Geology and Radioactivity of the Basement Rocks of Wadi El-Sahu Area, Southwestern Sinai, Egypt." Greener Journal of Geology and Earth Sciences 4, no. 1 (2016): 1–22. https://doi.org/10.15580/GJGES.2016.1.021716041.

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The study area is covered by basement and sedimentary rocks. The basement rocks are represented by paragneiss, orthogneiss and younger granites, while the sedimentary succession is represented by clastic Paleozoic rocks. The younger granites are microscopically distinguished into monzogranite and syenogranite. Geochemically, the studied younger granites are peraluminous with alkaline affinity (moderately alkaline) originated in extensional regime. Monzogranite belongs to I-type granite formed in volcanic arc tectonic setting, while the syenogranite belongs to A-type formed in within-plate tect

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6

Stepanyuk, L., О. Hrinchenko, T. Dovbush, O. Ziultsle, N. Konoval, and T. Mironchuk. "AGE SPAN FORMATION IN GRANITOIDS OF UKRAINIAN SHIELD." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (88) (2020): 12–16. http://dx.doi.org/10.17721/1728-2713.88.02.

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The paper discusses Berdychiv type granitoids that have always stirred up interest among researchers of the Ukrainian Shield. These rocks include minerals that are uncharacteristic of granites - cordierite, sillimanite, andalusite - and are closely related to rocks of the supposed substratum. At the same time, there still remain questions about the genetic nature of Berdychiv granites. Despite the fact that most researchers treat these granites as intrusive (anatectic) formations, there are other concepts according to which these granites are considered to be the products of metasomatic transf

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Lamoso, Ingrid Souto Maia, and Valdecir De Assis Janasi. "SHRIMP U-Pb zircon dating of Neoproterozoic granites from the easternmost São Roque Domain, Ribeira Belt." Geologia USP. Série Científica 19, no. 3 (2019): 55–75. http://dx.doi.org/10.11606/issn.2316-9095.v19-148374.

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Four granitic plutons from the easternmost portion of the São Roque Domain (SRD) were dated by U-Pb zircon SHRIMP; the results indicate that the peak of granitic magmatism was concentrated in a short interval (606–589 Ma), the same as in the central portion of the SRD. The two porphyritic biotite granites (Morro Azul and Imbiruçu) yield the oldest ages (respectively, 601.0 ± 4.9 Ma and 606.3 ± 4.8 Ma) and have inherited zircons with similar ages (~2.1–2.0 Ga), but are not comagmatic. The Morro Azul granite has geochemical signature similar to other high-K calc-alkaline (HKCA) granites from the

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8

A.Olasehinde, Ashano E.C, and Singh G.P. "ANALYSIS OF MAGNETIC ANOMALY OVER THE RIRUWAI YOUNGER GRANITE RING COMPLEX: A GEODYNAMIC IMPLICATION." Continental J. Earth Sciences 7, no. 1 (2012): 9–18. https://doi.org/10.5281/zenodo.833416.

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The Riruwai Complex constitutes one of the Younger Granite Complexes in Nigeria within the Niger-Nigeria anorogenic belt province, located about 140Km south of Kano. It provides one of the finest examples of the complete cycle of anorogenicmagmaticactivities in Nigerian Province, and consists of alkaline volcanic and plutonic rocks ranging from pyroxene bearing porphyries, rhyolites and comendites, to riebeckite granites. The aeromagnetic intensity field anomaly of the Riruwai Younger Granite ring complex has been studied and analyzed to establish the tectonic nature of the complex and its inf

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9

Sarvothaman, H., and C. Leelanandam. "Peraluminous, Metaluminous and Alkaline Granites from Parts of Andhra Pradesh and Karnataka in the Dharwar Craton: A Critical Reappraisal of Existing Data." Journal Geological Society of India 39, no. 4 (1992): 279–91. http://dx.doi.org/10.17491/jgsi/1992/390402.

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Abstract Predominant rocks in the Medak-Nizamabad segment in Andhra Pradesh are of a granodiorite-adamellite-granite (GAG) suite; the Alumina Saturation Indices or the molar Al2O2/(CaO + Na2O + K2O) of these units indicate that they arc metaluminous. This suite contains inclusions of a peraluminous tonalite-trondhjemite (IT) suite. A younger peraluminous suite of K-rich granite, granite (s.s.) and adamellite (KGA) intrudes the metaluminous GAG suite and the peraluminous IT suite; a body of alkaline granite intrudes the peraluminous granites. The tonalite-trondhjemite protoliths of the ca. 3000

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10

Kerr, A., G. R. Dunning, and R. D. Tucker. "The youngest Paleozoic plutonism of the Newfoundland Appalachians: U–Pb ages from the St. Lawrence and François granites." Canadian Journal of Earth Sciences 30, no. 12 (1993): 2328–33. http://dx.doi.org/10.1139/e93-202.

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The posttectonic St. Lawrence and François granites have long been regarded as the youngest Paleozoic plutonic suites of the Newfoundland Appalachians. Their U–Pb ages of 374 ± 2 and 378 ± 2 Ma, respectively, define a Middle to Late Devonian magmatic event. Mid-Carboniferous magmatic and (or) rifting events, suggested on the basis of earlier Rb–Sr dating of the St. Lawrence Granite, are not supported by these new data. Both granites intrude major ductile and brittle structures that were active during the early Paleozoic, and they provide a younger age limit for major tectonic activity in the A

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11

T, Aga, and Haruna A. I. "The field geology and petrography of the kofayi younger granite complex, central Nigeria." International Journal of Advanced Geosciences 7, no. 2 (2019): 95. http://dx.doi.org/10.14419/ijag.v7i2.29055.

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The Kofayi Younger Granite Complex is one of the several anorogenic alkaline Younger Granite Complexes that is located approximately 45 kilometres north east of Jos, Nigeria. The complex is found to comprise of felsic rocks like; biotite-granites, biotite microgranites and granodiorites. They are also found to be associated with mafic rocks like diorites which, at some portions have formed hybrid rocks. Quartz- feldspar- granites are the porphyritic rocks that found in the ring complex. The complex intrude the basement rocks of central Nigeria. Structural trends on these rocks suggest that the

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12

Alharshan, Gharam A., Mohamed S. Kamar, El Saeed R. Lasheen, et al. "Distribution of Radionuclides and Radiological Health Assessment in Seih-Sidri Area, Southwestern Sinai." International Journal of Environmental Research and Public Health 19, no. 17 (2022): 10717. http://dx.doi.org/10.3390/ijerph191710717.

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The current contribution goal is to measure the distribution of the radionuclide within the exposed rock units of southwestern Sinai, Seih-Sidri area, and assess the radiological risk. Gneisses, older granites, younger gabbro, younger granites, and post granitic dikes (pegmatites) are the main rock units copout in the target area. Radioactivity, as well as radiological implications, were investigated for forty-three samples from gneisses (seven hornblende biotite gneiss and seven biotite gneiss), older granites (fourteen samples), and younger granites (fifteen samples of syenogranites) using N

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Guimarães, Frederico Sousa, Rongqing Zhang, Bernd Lehmann, Alexandre Raphael Cabral, and Francisco Javier Rios. "CASSITERITE U-Pb GEOCHRONOLOGY OF THE SANTA BÁRBARA TIN DISTRICT, RONDÔNIA TIN PROVINCE, BRAZIL." Economic Geology 117, no. 3 (2022): 719–29. http://dx.doi.org/10.5382/econgeo.4876.

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Abstract The Mesoproterozoic Rondônia Tin Province of the Amazonian craton records a protracted history of about 600 m.y. of successive rare-metal granite intrusions and hosts the youngest known event of tin-granite emplacement of the craton—a rare-metal granite suite known as the Younger Granites of Rondônia intrusive suite. The ~1 Ga suite is currently interpreted as intracratonic magmatism resulting from a Grenvillian-age orogeny during the assembly of Rodinia. The Santa Bárbara massif is a tin-granite system of the Younger Granites of Rondônia intrusive suite that hosts Sn-Nb-Ta-W–bearing

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14

Chappell, B. W., and W. E. Stephens. "Origin of infracrustal (I-type) granite magmas." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 79, no. 2-3 (1988): 71–86. http://dx.doi.org/10.1017/s0263593300014139.

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ABSTRACTI-type granites are produced by partial melting of older igneous rocks that are metaluminous and hence have not undergone any significant amount of chemical weathering. In the Lachlan Fold Belt of southeastern Australia and the Caledonian Fold Belt of Britain and Ireland there was a major magmatic event close to 400 Ma ago involving a massive introduction of heat into the crust. In both areas, that Caledonian-age event produced large volumes of I-type granite and related volcanic rocks. Granites of these two areas are not identical in character but they do show many similarities and ar

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Robb, L. J., F. M. Meyer, C. J. Hawkesworth, and N. J. Gardiner. "Petrogenesis of Archaean granites in the Barberton region of South Africa as a guide to early crustal evolution." South African Journal of Geology 124, no. 1 (2021): 111–40. http://dx.doi.org/10.25131/sajg.124.0021.

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ABSTRACT The Barberton region of South Africa is characterized by a broad variety of granite types that range in age from ca. 3.5 Ga to 2.7 Ga and reflect the processes involved in the formation of Archaean continental crust on the Kaapvaal Craton. These granites are subdivided into three groups, as follows: A tonalite-trondhjemite-granodiorite (TTG) suite diapirically emplaced at 3 450 Ma and 3 250 Ma into pre-existing metamorphosed greenstone belt material. TTG melts were derived from melting amphibolite in the lower crust, with individual plutons being emplaced at various crustal levels. Th

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16

Conliffe, J., and M. Feely. "Fluid inclusions in Irish granite quartz: monitors of fluids trapped in the onshore Irish Massif." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101, no. 1 (2010): 53–66. http://dx.doi.org/10.1017/s1755691010009047.

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ABSTRACTFluid inclusion studies of granite quartz provide an opportunity to study fluid flow associated with igneous activity and post-emplacement fluid processes. This study presents new fluid inclusion data from the late Caledonian Donegal granites and Newry granodiorite, and the Tertiary Mourne Mountains granite in Ireland, which identify three distinct fluids. Aqueous-carbonic fluids (Type 1) have been recorded in late Caledonian granites with a significant mantle component (Newry granodiorite and the Ardara and Thorr granites in Donegal). These fluids represent late-magmatic fluids trappe

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Chékaraou, Mahamane M. S., and Moussa Konaté. "Permian Ages of “Younger Granites” from Mounio Province (Gouré area, Southeastern Niger)." European Journal of Environment and Earth Sciences 2, no. 6 (2021): 27–35. http://dx.doi.org/10.24018/ejgeo.2021.2.6.220.

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African formations intruded by the “Younger Granites” ring complex. In the study area, the “Younger Granites” are represented by volcanic to acid plutonic rocks with hyperalkaline trends (pyroclastic rocks, rhyolites, microgranites, granites, syenites), forming in the North, a circular structure called Gouré ring complex. Preliminary geochronological datings of the Mounio granites have yielded Carboniferous ages. However, recent investigations carried out in this province have identified structures similar to Pan-African deformation structures, such as folds and several generations of schistos

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Hassaan, Mahmoud M., Sayed A. Omar, Ahmed E. Khalil, et al. "Prognostic Exploration of U-F-Au-Mo-W Younger Granites for Geochemical Pathfinders, Genetic Affiliations, and Tectonic Setting in El-Erediya-El-Missikat Province, Eastern Desert, Egypt." Minerals 12, no. 5 (2022): 518. http://dx.doi.org/10.3390/min12050518.

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Younger granite bodies form two arches, the western and the eastern (WA, EA), which extend from the south northwards from the Meatique, ophiolitic group-island arc rocks, to the large older granite outcrop to the north. This paper concerns the feasibility of exploration in the El-Erediya-Ria El-Garah-El-Gidami-El-Missikat Y Gr regions. Fieldwork and remote sensing, together with geochemical, petrochemical, and mineralogical studies, are used to show the controlling factors, routes, and the origins of the deposits. Remote sensing is used to delineate the different rock units. Normal and strike–

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Sardi, Fernando G., Pablo Grosse, Mamoru Murata, and Rafael Pablo Lozano Fernández. "Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina." Andean Geology 45, no. 2 (2018): 229. http://dx.doi.org/10.5027/andgeov45n2-3015.

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The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal relations, textures and compositions. The dominant facies (Regional Porphyritic Granite; RPG) is a porphyritic two-mica monzo- to syenogranite, with abundant microcline megacrysts up to 12 cm in size. It was emplaced in a dominant extensional setting and has a mainly crustal source but with participation of a mantle-derived component. The RPG tr

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El Dabe, Mohamed M., A. M. Ismail, Mohamed Metwaly, Sherif A. Taalab, Mohamed Y. Hanfi, and Antoaneta Ene. "Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material." Materials 15, no. 3 (2022): 1224. http://dx.doi.org/10.3390/ma15031224.

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The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogranite intrudes metagabbro diorite complex with sharp contacts. Based on the activity concentrations, the environmental parameters such as absorbed dose rate (Dair), annual effective dose (AED), radium equivalent activity (Raeq), external (Hex) and internal (Hin) hazard indices were measured. The mineralized peg

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Moustapha, Sanda Chékaraou Mahamane, Badamassi Kadri Mahaman Mansour, and Konaté Moussa. "Petrographic Characterisation of the Mounio "Younger Granites" Province, Central Portion of the Pan-African Mobile Chain at Gouré, South-East Niger." Current Journal of Applied Science and Technology 43, no. 12 (2024): 175–91. https://doi.org/10.9734/cjast/2024/v43i124469.

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The petrography of the Mounio province, the subject of this study, is poorly understood, as very few geological studies have been undertaken. This province is an integral part of the Pan-African mobile zone located to the east of the West African craton, between the Tuareg and the Benino-Nigerian Shields. In the study area, the Pan-African formations were intruded by anorogenic magmatism, resulting in the emplacement of the Younger granites. Most of the petrographic data in this area of the Niger basement come from geological correlations. The aim of this study is to update the geological map

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Stone, M., J. Klomínský, and G. S. Rajpoot. "Composition of trioctahedral micas in the Karlovy Vary pluton, Czech Republic and a comparison with those in the Coruubian batholith, SW England." Mineralogical Magazine 61, no. 409 (1997): 791–807. http://dx.doi.org/10.1180/minmag.1997.061.409.04.

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AbstractTrioctahedral micas in the Karlovy Vary pluton range in composition from Fe-biotites in the granites of the Older Intrusive Complex (OIC) through siderophyllite and lithian siderophyllite to zinnwaldite in the granites of the Younger Intrusive Complex (YIC). Li + AlVI + Si would appear to substitute for Fe2+ + AlIV in biotite with a formula similar to that given in Henderson et al. (1989), but Li + Si appears to substitute for Fe2+ + AlIV in the Li-micas. In mica vs. host rock plots, Rb and F show positive linear covariation except for the Li-mica granites, but femic constituents and t

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Broska, Igor, and Igor Petrík. "Variscan thrusting in I- and S-type granitic rocks of the Tribeč Mountains, Western Carpathians (Slovakia): evidence from mineral compositions and monazite dating." Geologica Carpathica 66, no. 6 (2015): 455–71. http://dx.doi.org/10.1515/geoca-2015-0038.

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AbstractThe Tribeč granitic core (Tatric Superunit, Western Carpathians, Slovakia) is formed by Devonian/Lower Carboniferous, calc-alkaline I- and S-type granitic rocks and their altered equivalents, which provide a rare opportunity to study the Variscan magmatic, post-magmatic and tectonic evolution. The calculatedP-T-Xpath of I-type granitic rocks, based on Fe-Ti oxides, hornblende, titanite and mica-bearing equilibria, illustrates changes in redox evolution. There is a transition from magmatic stage atTca. 800–850 °C and moderate oxygen fugacity (FMQ buffer) to an oxidation event at 600 °C

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Collins, William J., Hui-Qing Huang, Peter Bowden, and A. I. S. Kemp. "Repeated S–I–A-type granite trilogy in the Lachlan Orogen and geochemical contrasts with A-type granites in Nigeria: implications for petrogenesis and tectonic discrimination." Geological Society, London, Special Publications 491, no. 1 (2019): 53–76. http://dx.doi.org/10.1144/sp491-2018-159.

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AbstractThe classical S–I–A-type granites from the Lachlan Orogen, SE Australia, formed as a tectonic end-member of the accretionary orogenic spectrum, the Paleozoic Tasmanides. The sequence of S- to I- to A-type granite is repeated at least three times. All the granites are syn-extensional, formed in a dominantly back-arc setting behind a single, stepwise-retreating arc system between 530 and 230 Ma. Peralkaline granites are rare. Systematic S–I–A progressions indicate the progressive dilution of an old crustal component as magmatism evolved from arc (S-type) to proximal back-arc (I-type) to

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Barr, S. M., C. E. White, N. G. Culshaw, and J. WF Ketchum. "Geology and tectonic setting of Paleoproterozoic granitoid suites in the Island Harbour Bay area, Makkovik Province, Labrador." Canadian Journal of Earth Sciences 38, no. 3 (2001): 441–63. http://dx.doi.org/10.1139/e00-086.

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Paleoproterozoic granitoid rocks in the Island Harbour Bay area (Kaipokok domain, Makkovik Province, Labrador) are divided into four separate suites on the basis of field relations, petrology, and age. The redefined Island Harbour Bay plutonic suite consists of ca. 18951870 Ma dioritic to granitic (mainly granodioritic and granitic) units. The rocks are variably foliated as a result of emplacement under amphibolite-facies conditions in a dextral transpressive regime during Andean-type subduction. The dominant mafic mineral is biotite, and accessory epidote, allanite, and titanite are abundant

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STEPANYUK, L. M., S. I. KURYLO, O. V. KOVTUN, T. I. DOVBUSH, and O. B. VYSOTSKY. "Uranium-Lead Geochronology of Two-Feldspar Granites of the Inhul Megablock (Ukrainian Shield) by Monazite." Mineralogical journal 43, no. 2 (2021): 49–57. http://dx.doi.org/10.15407/mineraljournal.43.02.049.

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In the area of the Novooleksandrivka village, the valley of the Bokovenka river crosses a powerful strip of metamorphic rocks of the Inhulo-Inhulets series with numerous small granitoid bodies of the Kirovohrad complex. In the right bank of the river valley north of Novooleksandrivka there are almost continuous rock outcrops of porphyry-like, mostly coarse-grained garnet-biotite granites, which are cut by veins of aplite-pegmatoid and pegmatoid granites. Uranium-lead isotope systems of accessory monazites from porphyry-like granite, layered body of uneven-grained granite and from veined body o

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Gosselin, D. C., J. J. Papike, C. K. Shearer, Z. E. Peterman, and J. C. Laul. "Geochemistry and origin of Archean granites from the Black Hills, South Dakota." Canadian Journal of Earth Sciences 27, no. 1 (1990): 57–71. http://dx.doi.org/10.1139/e90-005.

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The Little Elk Granite (2549 Ma) and granite at Bear Mountain (BMG) (~2.5 Ga) of the Black Hills formed as a result of a collisional event along the eastern margin of the Wyoming Province during the late Archean. Geochemical modelling and Nd isotopic data indicate that the Little Elk Granite was generated by the partial melting of a slightly enriched (εNd = −1.07 to −3.69) granodioritic source that had a crustal residence time of at least 190 Ma. The medium-grained to pegmatitic, peraluminous, leucocratic BMG was produced by melting a long-lived (>600 Ma), compositionally variable, enriched

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PIMENTEL, MÁRCIO M., and NILSON F. BOTELHO. "Sr and Nd isotopic characteristics of 1.77-1.58 Ga rift-related granites and volcanics of the Goiás tin province, central Brazil." Anais da Academia Brasileira de Ciências 73, no. 2 (2001): 263–76. http://dx.doi.org/10.1590/s0001-37652001000200010.

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Supracrustal rocks of the Araí Group, together with coeval A-type granites represent a ca. 1.77-1.58 Ga old continental rift in Brazil. Two granite families are identified: the older (1.77 Ga) group forms small undeformed plutons, and the younger granites (ca. 1.58 Ga) constitute larger, deformed plutons. Sr-Nd isotopic data for these rocks indicate that the magmatism is mostly product of re-melting of Paleoproterozoic sialic crust. Initial Sr ratios for both granite families are ca 0.726 and 0.720. Most TDM model ages are between 2.58 and 1.80 Ga. epsilonND(T) values are between +3.6 and -11.

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Artemenko, G. V., L. V. Shumlyanskyy, I. A. Shvaika, and V. K. Butyrin. "AGE OF THE HANNIVKA GRANITE (MIDDLE-DNIEPER MEGABLOCK OF THE UKRAINIAN SHIELD)." Mineralogical Journal 44, no. 4 (2022): 73–83. http://dx.doi.org/10.15407/mineraljournal.44.04.073.

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The Middle-Dnieper megablock, which is a fragment of the craton, differs from other cratons found on Earth. This is because of the large variety of granitoids (Tokiv, Mokro-Moskowka, and Demuryne complexes) in the former that were formed after the Mesoarchean TTG. Thus, the Middle-Dnieper megablock is important for studying the genesis and geodynamic formation conditions of Late Archaean granitoids. The granitoids in the Middle-Dnieper megablock are not well understood. They include the Hannivka granites of the East Hannivka monocline of the Kryvyi Rih-Kremenchuk structure, whose age and strat

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Thanmaya, Bandikane M., N. Kikkeri Prakash Narasimha, B. Vishwamurthy Suresh Kumar, and Prahlada Mahantesha. "Sanidinite facies metamorphism at Nagarahal Village of Bilgi taluk, Bagalkot district, Karnataka, India." Journal of Geology, Geography and Geoecology 33, no. 1 (2024): 192–203. http://dx.doi.org/10.15421/112418.

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   Nagarahal village in the Bilgi taluk of Bagalkot district in Karnataka state shows the contact between the younger Bilgi granites and the Deccan basalts. The thermal impact that has happened on the pre-existing granites by the basalts has been studied by identifying the field occurrence of the contact zone of granites and basalts. The unaffected portion of the granites and the basalts that are far away from the contact are studied as well. The petrographic studies of the contact rocks between the granites and basalts show the polygonal recrystallized quartz with the triple

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Ogunleye, P. O., E. C. Ike, and I. Garba. "Geochemical characteristics of the niobium-rich arfvedsonite granites, Younger Granites province of Nigeria." Geochemistry 65, no. 3 (2005): 279–96. http://dx.doi.org/10.1016/j.chemer.2003.10.003.

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Lawali Idi Chamsi, Badamassi Kadri Mahaman Mansour, Angela Mormone, and Ahmed Yacouba. "Mineralogical evolution of the anorogenic granites of Tirmini (Damagaram Southeast, Niger)." World Journal of Advanced Research and Reviews 24, no. 2 (2024): 1954–61. http://dx.doi.org/10.30574/wjarr.2024.24.2.3493.

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The present study focuses on the anorogenic granites of Tirmini. The latter are part of the younger granites of the pan-African province of Damagaram-Mounio, which constitutes a connection between the younger granites of the Aïr in the north and those of the Jos Plateau in the south. The objective of this study is to determine the mineralogical characteristics of the anorogenic granites of Tirmini. The methodological approach used includes X-ray diffraction (XRD) analysis on the one hand, and scanning electron microscope (SEM) and cathodoluminescence munimicroscope observations on the other. T

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Lawali, Idi Chamsi, Kadri Mahaman Mansour Badamassi, Mormone Angela, and Yacouba Ahmed. "Mineralogical evolution of the anorogenic granites of Tirmini (Damagaram Southeast, Niger)." World Journal of Advanced Research and Reviews 24, no. 2 (2024): 1954–61. https://doi.org/10.5281/zenodo.15105664.

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The present study focuses on the anorogenic granites of Tirmini. The latter are part of the younger granites of the pan-African province of Damagaram-Mounio, which constitutes a connection between the younger granites of the Aïr in the north and those of the Jos Plateau in the south. The objective of this study is to determine the mineralogical characteristics of the anorogenic granites of Tirmini. The methodological approach used includes X-ray diffraction (XRD) analysis on the one hand, and scanning electron microscope (SEM) and cathodoluminescence munimicroscope observations on the oth

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34

Harding, K. L., W. A. Morris, S. J. Balch, P. Lapointe, and A. G. Latham. "A comparison of magnetic character and alteration in three granite drill cores from eastern Canada." Canadian Journal of Earth Sciences 25, no. 8 (1988): 1141–50. http://dx.doi.org/10.1139/e88-112.

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Bulk magnetic susceptibility (BMS) measurements have been made on granite drill cores from the St. George batholith (New Brunswick), the South Mountain batholith (Nova Scotia), and the Wedgeport pluton (Nova Scotia). The primary magnetite concentrations of the two Nova Scotia cores are statistically indistinguishable, thus lending support to the hypothesis that the Wedgeport pluton, despite being 50 Ma younger, is a satellite of the South Mountain batholith.The St. George core has a primary magnetite concentration over 30 times greater than the Nova Scotia cores, but low-temperature alteration

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35

Badejoko, T. A. "The petrogenesis of the Younger granites of Nigeria." Journal of African Earth Sciences (1983) 5, no. 3 (1986): 233–42. http://dx.doi.org/10.1016/0899-5362(86)90014-x.

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Shardakova, G. Yu. "New data on the trace element composition and Lu-Hf isotopic system of zircons from the Early Cambrian granites of the Ufaley block (Middle Urals): a step to the correction of geodynamic concepts." LITHOSPHERE (Russia) 22, no. 1 (2022): 55–74. http://dx.doi.org/10.24930/1681-9004-2022-22-1-55-74.

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Research subject. Composition and isotopic parameters of zircons and their host granites of the Bitim complex, localised in the eastern part of the Ufaley block (Middle Urals).Materials and methods. The determination of trace element composition and Lu-Hf isotope system in zircons was carried out by LA-ICP-MS (the “Geoanalitik” shared research facilities of the IGG UB RAS, Ekaterinburg).Results and conclusions. The images and geochemical features of the main zircon population from granites confirm their magmatic genesis and minimal alteration, which proves previously defined Vendian- Cambrian

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Lawal, Mutari, Mohammed Abubakar Mohammed, Kehinde Ayomikun Alalade, et al. "Geology of Basement Complex rocks in Kabo area, Kano, Northwestern Nigeria: Insights into the Trends of Mineralization in the Region." International Journal of Science for Global Sustainability 11, no. 1 (2025): 38–45. https://doi.org/10.57233/ijsgs.v11i1.780.

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Nigeria is situated in a mobile zone separating older cratons of West Africa and Gabon, and underlain by nearly equal proportions of sedimentary and crystalline rocks. The crystalline basement rocks comprises three lithological groups (the Basement Complex, the Younger Granites and the Tertiary-Recent Volcanics) that were affected by Pan African (~550 Ma) thermo-tectonic events. The Basement Complex (Precambrian) encompasses gneisses- and migmatite-complex with schist belts, granites and minor charnokites and syenites with complex history and geochronology. In Kano (Kabo NE, Sheet 80 of Nigeri

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Shniukova, K. Ye, L. L. Tomurko, and N. M. Konoval. "Geochemistry of Xenoliths in Rapakivi Granites of the Korsun-Novomyrhorod Pluton (Ukrainian Shield)." Mineralogical Journal 45, no. 2 (2023): 62–82. http://dx.doi.org/10.15407/mineraljournal.45.02.062.

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Rapakivi of the Korsun-Novomyrhorod pluton (KNP), being the latest Precambrian granites of the central part of the Ukrainian shield, contain older acidic and intermediate rocks as xenoliths, the geochemical features of which reflect the Early Proterozoic geodynamic situation. Rapakivi granites, their differentiates and three types of xenoliths in them, represented by plagiogneiss, pink granite and charnockitoid (mangerite), were selected in the northwestern part of the KNP for geochemical studies. Analysis findings were compared with the geochemical characteristics of similar rocks of igneous

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Lawali Idi Chamsi, Sanda Chékaraou Mahamane Moustapha, Ibrahim Maharou Hassane, Hamza Mayaki Issoufou, and Ahmed Yacouba. "Structural relationships of the younger granites of Tirmini (Damagaram south-east, Niger)." World Journal of Advanced Research and Reviews 21, no. 3 (2023): 2201–6. http://dx.doi.org/10.30574/wjarr.2024.21.3.0853.

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The Tirmini anorogenic ring complex is located approximately 25 km west of the town of Zinder, in the pan-African province of Damagaram-Mounio, the southeastern terminus of the Benin-Nigeria Shield. The aim of this study is to characterise the anorogenic deformation affecting the Tirmini younger granites. The petrography of Tirmini evolves from rhyolites to microgranites, granites and quartz alkaline syenite emplaced during anorogenic magmatism in the Permian (295 Ma). Very little structural data is available on the Tirmini complex. Only a cursory study of deformation has been carried out, wit

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40

Mustapha, S., S. Suleman, S. R. Iliyasu, et al. "INTERPRETATION OF AEROMAGNETIC DATA AND LANDSAT IMAGERY OVER THE NIGERIAN YOUNGER GRANITES IN AND AROUND KAFANCHAN AREA, NORTH-CENTRAL NIGERIA." FUDMA JOURNAL OF SCIENCES 4, no. 4 (2021): 323–33. http://dx.doi.org/10.33003/fjs-2020-0404-489.

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In this research the lineaments of the Kafanchan area in North-central Nigeria were investigated in order to explore the mineralization zones of the area. Aeromagnetic data over Kafanchan and environs within the Younger Granite Province, in the North-Central Nigeria were collated and analyzed. The aeromagnetic map of the area was interpreted both qualitatively and quantitatively so as to identify the nature of the magnetic sources and the trends direction in the study area. The trend of the Total Magnetic Intensity (TMI) map is predominantly in NE-SW. The First Vertical Derivative (FVD) Lineam

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41

Sant’Ovaia, Helena, Cláudia Cruz, Ana Gonçalves, Pedro Nogueira, and Fernando Noronha. "Deciphering Iberian Variscan Orogen Magmatism Using the Anisotropy of Magnetic Susceptibility from Granites." Minerals 14, no. 3 (2024): 309. http://dx.doi.org/10.3390/min14030309.

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In this paper, we have synthesized the information derived from more than 20 papers and PhD theses on the anisotropy of the magnetic susceptibility (AMS) of 19 Variscan granite plutons, spanning the period between 320 Ma and 296 Ma. The AMS data are obtained from 876 sampling sites with more than 7080 AMS measurements and a re-interpretation is proposed. The studied granites exhibit a magnetic susceptibility (Km) ranging from 30 to 10,436 × 10−6 SI units. Most granites typically exhibit Km values below 1000 × 10−6 SI, indicative of paramagnetic behavior. Biotite serves as the main carrier of i

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Richardson, Jean M., Keith Bell, John Blenkinsop, and David H. Watkinson. "Rb–Sr age and geochemical distinctions between the Carboniferous tin-bearing Davis Lake complex and the Devonian South Mountain batholith, Meguma Terrane, Nova Scotia." Canadian Journal of Earth Sciences 26, no. 10 (1989): 2044–61. http://dx.doi.org/10.1139/e89-172.

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The Davis Lake complex (DLC), composed of biotite monzogranite, leucomonzogranite, and cassiterite–topaz greisen, hosts the East Kemptville tin mine in southwestern Nova Scotia. The DLC monzogranite contains glomeroporphyritic biotite with ilmenite and many rare-earth-element (REE) bearing accessory minerals, zircon-bearing quartz phenocrysts, and xenoliths of biotite granite. Primary muscovite is rare. Major- and trace-element geochemical trends indicate well-defined, but limited, magmatic differentiation trends. REE patterns of the least-evolved granites are flat and show a Ce/Yb ratio of 10

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Lawali, Idi Chamsi, Chékaraou Mahamane Moustapha Sanda, Maharou Hassane Ibrahim, Mayaki Issoufou Hamza, and Yacouba Ahmed. "Structural relationships of the younger granites of Tirmini (Damagaram south-east, Niger)." World Journal of Advanced Research and Reviews 21, no. 3 (2024): 2201–6. https://doi.org/10.5281/zenodo.14175438.

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The Tirmini anorogenic ring complex is located approximately 25 km west of the town of Zinder, in the pan-African province of Damagaram-Mounio, the southeastern terminus of the Benin-Nigeria Shield. The aim of this study is to characterise the anorogenic deformation affecting the Tirmini younger granites. The petrography of Tirmini evolves from rhyolites to microgranites, granites and quartz alkaline syenite emplaced during anorogenic magmatism in the Permian (295 Ma). Very little structural data is available on the Tirmini complex. Only a cursory study of deformation has been carried out, wit

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P., R.C.Phani, Ningam N., and Srinivas M. "Field Geology and Petrography of Granitoid rocks in southeastern part of Nanded district, Maharashtra State." International Journal of Trend in Scientific Research and Development 1, no. 6 (2017): 988–96. https://doi.org/10.31142/ijtsrd4710.

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This paper presents field geological and petrographic aspects of various granitoid units occurring around Khatgaon area in the southeastern part of Nanded district of Maharashtra. The study area is bestowed with granitoids of Archaean to Proterozoic age overlain by Deccan basalts of Cretaceous age. Three main types of granitoids were identified in the study area viz., older granites, gneissic foliated granites and younger granites. These granitoid rocks are traversed by dykes, veins and veinlets of felsic and mafic composition. Although these granitoids are similar in mineralogy, they exhibit

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Imeokparia, Ebo Gab. "Geochemical evolution of the metaluminous and peraluminous granites of Ganawuri Younger Granite Complex, northern Nigeria." Journal of African Earth Sciences (1983) 5, no. 2 (1986): 193–200. http://dx.doi.org/10.1016/0899-5362(86)90010-2.

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Denholm, J. L., A. S. Stepanov, S. Meffre, R. S. Bottrill, and J. M. Thompson. "The Geochronology of Tasmanian Tin Deposits Using LA-ICP-MS U-Pb Cassiterite Dating." Economic Geology 116, no. 6 (2021): 1387–407. http://dx.doi.org/10.5382/econgeo.4837.

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Abstract The island state of Tasmania is the most important tin producer in Australia. The spatial and genetic relationship between Tasmanian tin deposits and Devonian-Carboniferous granites, which intruded throughout the Tabberabberan orogeny, has long been understood. However, little geochronological data is available to link mineralization to nearby intrusions. In this study, we investigate the connection between 19 Tasmanian tin deposits and their potential source granites, using U-Pb cassiterite dating by laser ablation-inductively coupled plasma-mass spectrometry. Archean pegmatitic cass

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Mohammed, Y. B., Ilyasu Abdullahi Yerima, Aishatu Sani, A. K. Gazali, and Samaila B. Mshelia. "Geology and Hydrogeophysical Investigation of Gurum and Environs, Lere Sheet 147SE, Bassa-Plateau, North-Central Nigeria." European Journal of Theoretical and Applied Sciences 2, no. 2 (2024): 540–65. http://dx.doi.org/10.59324/ejtas.2024.2(2).47.

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Geology and hydrogeophysical investigation of Gurum and its environs was undertaken within Lere Sheet 147 SE. The geological studies revealed the presence of Precambrian rocks (undifferentiated migmatites and Older Granites) and Jurassic rocks (Younger Granite) of different varieties belonging to the Buji Complex. The Buji Complex is composed of two (2) super imposed ring complexes, the earlier volcanic and high- level hyperbyssal intrusion dominated by granitic rocks. Hydrogeophysical results showed depth to various geo-electric layers and the range of apparent resistivity values with litholo

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Y., B. Mohammed, Abdullahi Yerima Ilyasu, Sani Aishatu, K. Gazali A., and B. Mshelia Samaila. "Geology and Hydrogeophysical Investigation of Gurum and Environs, Lere Sheet 147SE, Bassa-Plateau, North-Central Nigeria." European Journal of Theoretical and Applied Sciences 2, no. 2 (2024): 540–65. https://doi.org/10.59324/ejtas.2024.2(2).47.

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Geology and hydrogeophysical investigation of Gurum and its environs was undertaken within Lere Sheet 147 SE. The geological studies revealed the presence of Precambrian rocks (undifferentiated migmatites and Older Granites) and Jurassic rocks (Younger Granite) of different varieties belonging to the Buji Complex. The Buji Complex is composed of two (2) super imposed ring complexes, the earlier volcanic and high- level hyperbyssal intrusion dominated by granitic rocks. Hydrogeophysical results showed depth to various geo-electric layers and the range of apparent resistivity values with litholo

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Ahmed, A. Ramadan, El-Azab Ashraf, A.M. El-Metwally Ahmed, and A. Abd El-Bary Amany. "Mineral Recource Prospecting and Evaluation of Dry Stream Sediments of Wadi Umm Gheig – Umm Naggat Area, Eastern Desert, Egypt." International Journal of Innovative Research in Multidisciplinary Education 03, no. 05 (2024): 866–72. https://doi.org/10.5281/zenodo.11394954.

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The area of Wadi Umm Gheig-Umm Naggat is located at the central part of the Eastern desert, Egypt, 50km south to El-Quseir city at the Red Sea coast. The area is dominated by metavolcanics, Older Granites, Dokhan Volcanics, intrusive cumulate gabbro and Younger Granites. This works focuses on heavy minerals distributed in dry stream sediments of Wadi Umm Gheig and Gabal Umm Nagat. The study has followed up the traditional methods for sample collection from the stream sediments and the plane study for investigation and prospecting, as well as evaluation of heavy mineral deposits. The studied be

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Tichomirowa, Marion, Axel Gerdes, Manuel Lapp, Dietmar Leonhardt, and Martin Whitehouse. "The Chemical Evolution from Older (323–318 Ma) towards Younger Highly Evolved Tin Granites (315–314 Ma)—Sources and Metal Enrichment in Variscan Granites of the Western Erzgebirge (Central European Variscides, Germany)." Minerals 9, no. 12 (2019): 769. http://dx.doi.org/10.3390/min9120769.

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The sources and critical enrichment processes for granite related tin ores are still not well understood. The Erzgebirge represents one of the classical regions for tin mineralization. We investigated the four largest plutons from the Western Erzgebirge (Germany) for the geochemistry of bulk rocks and autocrystic zircons and relate this information to their intrusion ages. The source rocks of the Variscan granites were identified as high-grade metamorphic rocks based on the comparison of Hf-O isotope data on zircons, the abundance of xenocrystic zircon ages as well as Nd and Hf model ages. Amo

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