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Journal articles on the topic 'Diorite'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Garde, A. A. "Post-kinematic diorite intrusions in Archaean basement rocks around outer Fiskefjord, southern West Greenland." Bulletin of the Geological Society of Denmark 39 (December 20, 1991): 167–77. http://dx.doi.org/10.37570/bgsd-1991-39-07.

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About twenty small dioritic intrusions around outer Fiskefjord, southern West Greenland, which are undeformed and unmigmatised, mark the final stage in middle Archaean accretion of continental crust, deformation and high-grade metamorphism in the Akia terrane. The diorites were emplaced into hot tonalitic gneisses, some of which were thoroughly retrograded from granulite facies prior to diorite intrusion. The diorites are themselves sporadically retrograded. A conventional zircon U-Pb age of 3017 + 12/-10 Ma has been obtained from one of the diorites. The diorites have SiO2 contents between ea

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2

Ponomareva, A. P., E. P. Izokh, and N. V. Andreeva. "INTERACTION OF MANTLE AND CRUSTAL MELTS DURING THE FORMATION OF THE MAGADAN BATHOLITH." Russian Geology and Geophysics 35, no. 2 (1994): 19–28. https://doi.org/10.2113/rgg.1994.35.2.19.

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Two closely associated homodrome rhythms, starting from gabbros or diorites and comprising quartz diorites, granodiorites, adamellites, granites and leucocratic granites, are distinguished in the Magadan series. Both rhythms differ in petrochemical and geochemical features. In addition, granodiorites of rhythm I, composing the major part of the Magadan series rocks, exhibit the presence of ovoid inclusions of diorite and contrasting granite-leucocratic compositions. The inclusions are compositionally similar to diorite and leuco-granite dikes localized in granodiorites, and diorite inclusions

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3

ZHANG, JIN-YANG, CHANG-QIAN MA, FU-HAO XIONG, and BIN LIU. "Petrogenesis and tectonic significance of the Late Permian–Middle Triassic calc-alkaline granites in the Balong region, eastern Kunlun Orogen, China." Geological Magazine 149, no. 5 (2012): 892–908. http://dx.doi.org/10.1017/s0016756811001142.

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AbstractNumerous calc-alkaline granitoid intrusions in the eastern Kunlun Orogen provide a valuable opportunity to constrain the evolution of the orogen. The age and genesis of these intrusions, however, remain poorly understood. The granitoid intrusions near the Balong region, eastern Kunlun Orogen, consist of granodiorite, diorite and syenogranite. The granodiorite contains crystallized segregations, abundant mafic microgranular enclaves (MMEs) and small quartz diorite stocks. In situ zircon U–Pb dating reveals that the granodiorites and quartz diorites were emplaced between 263 and 241 Ma,

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4

Skilskaya, E. D., D. A. Yablokova, A. V. Sergeeva, O. A. Zoben’ko, and T. M. Filosofova. "FORMATION AND FLUID REGIME OF THE AGINSKAYA SUBVOLCANIC GABBRO-DIORITE INTRUSION, CENTRAL KAMCHATKA." Tikhookeanskaya Geologiya 44, no. 4 (2025): 83–97. https://doi.org/10.30911/0207-4028-2025-44-4-83-97.

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The paper presents the results of petrological, mineralogical and geochemical studies of igneous rocks from the subvolcanic intrusion of gabbro-diorite and host volcanics of the Aginskoe gold-silver-telluride deposit located in the Central Kamchatka volcanic belt. Igneous rocks connected by multiple mutual transitions are represented by gabbro, gabbro-diorites, diorites, quartz diorites, and granites. In terms of composition, the rocks correspond to moderate- and high-potassium calcareous-alkaline petrochemical series. The host volcanics are comagmatic with the intrusive rocks. The main fluori

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5

Mbaihoudou, Diontar, Kwékam Maurice, Fozing Eric Martial, Kagou Dongmo Armand, and Tcheumenak Kouémo Jules. "Petrology and Geochemical Characteristic of Granitoids From Guéra Massif in the Central Part of Chad: An Example of Mixing Magmas." Earth Science Research 9, no. 2 (2020): 66. http://dx.doi.org/10.5539/esr.v9n2p66.

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The granitoids of Gu&eacute;ra Massif are composed of biotite-granite, amphibole-biotite granite and gabbro-diorite and commonly contain micro granular mafic enclaves which vary from monzogabbro to syenite composition. They are metaluminous, high-K calc-alkaline to shoshonitic series. Gabbro-diorite rocks are magnesian while amphibole-biotite granites are magnesian to ferroan, and biotite granites are ferroan. They are enriched in LREEs relative to HREE and display negative anomalies in Nb, Ta and Ti. Fields relationships, petrology and geochemistry indicate that mixing and mingling proces

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6

Déléris, J., A. Nédélec, E. Ferré, et al. "The Pan-African Toro Complex (northern Nigeria): magmatic interactions and structures in a bimodal intrusion." Geological Magazine 133, no. 5 (1996): 535–52. http://dx.doi.org/10.1017/s0016756800007822.

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AbstractThe Toro Complex is one of the Pan-African Older Granites of Nigeria, first described as a reversely zoned pluton made of a central dioritic mass surrounded by a broad granitic rim. It has been thoroughly reinvestigated both from the petrographic and structural points of view, with the help of systematic anisotropy of magnetic susceptibility (AMS) measurements. The granite main body is a hornblende–biotite porphyritic monzogranite characterized by an early submagmatic fabric displaying a concentric pattern of foliations and west plunging lineations (stage 1). This fabric is overprinted

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7

Sutarto, Sutarto, Arifudin Idrus, Agung Harijoko, Lucas Donny Setijadji, and Franz Michael Meyer. "VEINS AND HYDROTHERMAL BRECCIAS OF THE RANDU KUNING PORPHYRY Cu-Au AND EPITHERMAL Au DEPOSITS AT SELOGIRI AREA, CENTRAL JAVA INDONESIA." Journal of Applied Geology 7, no. 2 (2015): 82. http://dx.doi.org/10.22146/jag.26982.

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The Randu Kuning prospect is situated at Selogiri area, Wonogiri, Central Java, Indonesia. This location is about 40 km to the south-east from Solo city or approximately 70 km east of Yogyakarta city. Many Tertiary dioritic rocks related alterationmineralisation were found at the Randu Kuning area and its vicinity, including hornblende microdiorite, hornblende-pyroxene diorite and quartz diorite. Mineralisation type of the Randu Kuning prospect was interpreted as porphyry Cu-Au and a number epithermal Au-base metals deposits in its surrounding. The closed existing of porphyry Cu-Au and epither

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8

Fan, Dongxu, Shucheng Tan, Xia Wang, et al. "Geochronology, Petrogenesis and Geodynamic Setting of the Kaimuqi Mafic–Ultramafic and Dioritic Intrusions in the Eastern Kunlun Orogen, NW China." Minerals 13, no. 1 (2023): 73. http://dx.doi.org/10.3390/min13010073.

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The Kaimuqi area in the Eastern Kunlun Orogen (EKO) contains many lherzolite, olivine websterite, gabbro and diorite intrusions, and new zircon U‒Pb dating, Lu‒Hf isotope and whole-rock geochemical data are presented herein to further confirm the Late Triassic mafic–ultramafic magmatism with Cu–Ni mineralization and to discuss the petrogenesis and geodynamic setting. Zircon U‒Pb dating shows that the Late Triassic ages, corresponding to 220 Ma and 222 Ma, reveal the mafic–ultramafic and dioritic magmatism in Kaimuqi, respectively. Zircon from gabbro has εHf(t) values of −3.4 to −0.2, with corr

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9

Berzina, A. N., A. P. Berzina, and V. O. Gimon. "The Aksug Porphyry Cu–Mo Ore-Magmatic System (Northeastern Tuva): Sources and Formation of Ore-Bearing Magma." Russian Geology and Geophysics 62, no. 4 (2021): 445–59. http://dx.doi.org/10.2113/rgg20194115.

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Abstract ––Two stages are recognized in the evolution of the Aksug ore-magmatic system (OMS): (1) formation of the Aksug granitoid pluton and (2) emplacement of small ore-bearing intrusions. Intrusive bodies of the two stages are composed of rocks of the same type and bear copper mineralization: poor dispersed and large-scale veinlet-disseminated, respectively. The pluton and small intrusions are formed by gabbroid and granitoid rocks, with similar petrogeochemical characteristics of igneous rocks of the same type. The plutonic gabbroic association includes gabbro, gabbrodiorites, and pyroxene

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10

Bina, Mehdi, Mohammad Ali Arian, Mohsen Pourkermani, Mohammad Hasan Bazoobandi, and Abdollah Yazdi. "Study of the petrography and tectonic settings of sills in Lavasanat district, Tehran (north of Iran)." Nexo Revista Científica 33, no. 02 (2020): 286–96. http://dx.doi.org/10.5377/nexo.v33i02.10768.

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The study area is located in Lavasanat District in the northeast of Tehran in Central Alborz zone. The outcrops are mainly linked to Karaj Formation, which belongs to the upper Eocene to Oligocene periods. In the study area, there are various plutonic rocks that are identified in the form of numerous dike and sill on the ground. These sills are injected in between sedimentary layers. The rocks forming the sills include the spectrum of gabbro, gabbro diorite, diorite, monzonite, and syenite. In some areas, these rocks have undergone alterations and have traces of the saussuritization and chlori

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11

Dorais, Michael John, Wallace Bothner, and Robert Buchwaldt. "The Appledore Island pluton of the Rye Complex, coastal New Hampshire and Maine, USA: geochronological and chemical evidence for the affinity of an enigmatic terrane." Atlantic Geology 50 (October 18, 2014): 138. http://dx.doi.org/10.4138/atlgeol.2014.009.

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The Rye Complex of coastal New Hampshire and Maine is a peri-Gondwanan terrrane that up to now had an uncertain origin. An offshore portion of the complex, Appledore Island of the Isles of Shoals, hosts a mainly dioritic intrusion that yielded an U-Pb zircon age of 361.09 ± 0.14 Ma, allowing comparison of its geochemical characteristics with mafic rocks of similar age across the northern Appalachian orogen. The Appledore Island diorite has similar major, trace, and isotopic compositions as continental rift tholeiite in the Narragansett Basin in southern New England and in the Maritimes Basin o

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12

Friend, C. R. L., and A. P. Nutman. "The geology and structural setting of the Proterozoic Ammassalik Intrusive Complex, East Greenland." Rapport Grønlands Geologiske Undersøgelse 146 (December 31, 1989): 41–45. http://dx.doi.org/10.34194/rapggu.v146.8094.

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The rocks of the Ammassalik area comprise reworked Archaean gneisses and a variety of mainly pelitic to psammitic Proterozoic metasediments. Proterozoic deformation caused thrust intercalation of the rocks and folded them into overturned, southerly directed nappes. Three dioritic centres, collectively named the 'Ammassalik Intrusive Complex' in this paper, were emplaced into a tract occupied by metasediments, causing extensive anatexis. The granitic liquids produced from this resulted in magma mixing with the still liquid diorite; they also formed discrete sheets of augen granite intruding the

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13

Makarenko, I. B. "Density heterogeneity of the Earth’s crust of Ukraine and adjacent territories from three-dimensional gravity modelling." Geofizicheskiy Zhurnal 43, no. 2 (2021): 45–95. http://dx.doi.org/10.24028/gzh.v43i2.230190.

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The work was performed to study the density heterogeneity of the crust of Ukraine and adjacent regions analyzing detailed 3D gravity models of the following tectonic regions and separate structures: Dnieper-Donets Basin and Donbas, Ingulsky megablock, Golovanivska suture zone, latitudinal zones of fractures of the Ukrainian Shield, Black Sea megadepression and surrounding areas. The models are constructed on the basis of geological, petrophysical and seismic data along geotravers, DSS profiles, the modern WARR methodsand are calculated using the automated software complex for interpretation of

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14

O'Laughlin, Michael. "The Diorite Whales." Humanitas 9, no. 2 (1996): 98–111. http://dx.doi.org/10.5840/humanitas19969220.

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15

Katz, Laura R., Daniel J. Kontak, Benoît Dubé, and Vicki McNicoll. "The geology, petrology, and geochronology of the Archean Côté Gold large-tonnage, low-grade intrusion-related Au(–Cu) deposit, Swayze greenstone belt, Ontario, Canada." Canadian Journal of Earth Sciences 54, no. 2 (2017): 173–202. http://dx.doi.org/10.1139/cjes-2016-0007.

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The Archean Côté Gold Au(–Cu) deposit is the first large gold deposit discovered in the Swayze greenstone belt of the Abitibi Subprovince. The deposit is a low-grade, large-tonnage type with a combined indicated and inferred resource of 8.65 M oz Au (245.2 t Au). The deposit is hosted by the Chester intrusive complex (CIC), a multiphase, subvolcanic intrusion composed of low-Al tonalite, diorite, and quartz diorite, plus magmatic and hydrothermal breccia bodies. The age of the tonalite and dioritic phases is constrained at 2741–2739 ± 1 Ma using high-precision isotope dilution – thermal ioniza

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16

Obioha, Young Ezenwa, and Collins Chukwuemeka Mbonu. "Petrology and Geochemistry of Rocks of Ishiagu and Environs Southeastern Nigeria Using Ed-Xrf Method." Sumerianz Journal of Scientific Research, no. 43 (September 29, 2021): 76–84. http://dx.doi.org/10.47752/sjsr.43.76.84.

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Geochemistry of rocks of Ishiagu area was carried out using Energy Dispersive X-Ray fluorescence (ED-XRF) method. Twelve samples were analyzed and their geochemical properties determined using Excel-Software. Geological mapping reveals that basalts, dolerites and diorites emplaced in shale and mudrock country hosts are the main lithological units occurring in the area. They have silica content of 40.4–49.2wt.%, indicating they are basic-ultrabasic in character. The dolerite and diorite contain average plagioclase (An70-17.4vol.%), hematite 26.29vol.%, showing enrichment in ferromagnesian miner

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17

Tuleugaliyeva, E. S., and A. Z. Bekeshev. "EPOXY COMPOSITES REINFORCED WITH FIRE-RESISTANT DIORITE." Vestnik of M. Kozybayev North Kazakhstan University, no. 2 (54) (July 7, 2022): 17–24. http://dx.doi.org/10.54596/2309-6977-2022-2-17-24.

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As a result of the work, the influence of the polyfunctional modifier oligo (resorcinol phenyl phosphate) and the dispersed mineral filler diorite with terminal phenyl groups on the physicochemical and deformation -strength properties of epoxy composites was studied. The effectiveness of using diorite epoxide as an active polymer filler has been proven. The effectiveness of using diorite as an active filler in epoxy polymers, which increases strength and changes the physicochemical properties of epoxy composites, has been proven. The optimal composition of diorite was selected as a structural

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18

Ramakrishnan, M., and D. Sundaravanan. "Differentiated Gabbro-Granophyre Composite Sill from Ramagiri Greenstone Belt, Andhra Pradesh." Journal Geological Society of India 35, no. 4 (1990): 367–79. http://dx.doi.org/10.17491/jgsi/1990/350406.

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Abstract The differentiated gabbro-granophyre composite sill, emplaced in the basic tuffs of Ramagiri greenstone belt, represents the first record of such an intrusion in the Eastern Dharwar craton. The sill consists of four differentiated gabbroic units, namely, the carbonated, mafic, normal and knotted gabbro forming a locally inverted stratigraphy along a steep fold limb in the belt. A faintly layered quartz diorite band, visually resembling anorthosite but compositionally different in having euhedral zoned feldspars and quartz-plagioclase "granophyric ' intergrowths, occurs in association

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19

Pripachkin, Pavel, Tatiana Rundkvist, Nikolay Groshev, Aiya Bazai, and Pavel Serov. "Archean Rocks of the Diorite Window Block in the Southern Framing of the Monchegorsk (2.5 Ga) Layered Mafic-Ultramafic Complex (Kola Peninsula, Russia)." Minerals 10, no. 10 (2020): 848. http://dx.doi.org/10.3390/min10100848.

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The intermediate rocks classified as diorite-gneisses occur within the southern part of the Monchegorsk (2.5 Ga) layered mafic-ultramafic complex (Kola Peninsula, Russia). These diorite-gneisses belong to a block historically known as the diorite window (DW) block. The same rocks occur in a framing of the Monchegorsk complex. The DW block is predominantly composed of diorite-gneisses and, to a lesser degree, of amphibolites. Multi-ordinal banding, complex folding, boudinage and metamorphic transformations, garnet porphyroblasts, and tourmaline veinlets are typical of the diorite-gneisses. In a

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20

Sarvothaman, H., and C. Leelanandam. "Petrography and Major Oxide Chemistry of The Archaean Granitic Rocks of the Medak Area, Andhra Pradesh." Journal Geological Society of India 30, no. 3 (1987): 194–209. http://dx.doi.org/10.17491/jgsi/1987/300303.

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Abstract The model compositions of the Archaean granitic (s.1.) rocks of the Medak area in Andhra Pradesh correspond to tonalite, quartz diorite, granodiorite. adamellite, quartz monzodiorite, granite (s.s.) and alkali feldspar granite. The granitic units show retrograde effects such as albitic rims around plagioclase at K-feldspar contacts, and inclusions of chlorite, epidote and ores in hornblende; anti-rapakivi mantling of plagioclase by K-feldspar is common; K-feldspars show incipient microclinisation. The diagnostic mineral parageneses of the granitic units indicate an overall metamorphis

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21

Kamali, Amin Allah, Mohsen Moayyed, Benoit M. Saumur, and Mohammad Fadaeian. "Mineralogy and Mineral Chemistry of Dioritic Dykes, Quartz Diorite Enclaves and Pyroxene of the Sungun Cu-Mo Porphyry Deposit, East Azerbaijan, Iran." Minerals 12, no. 10 (2022): 1218. http://dx.doi.org/10.3390/min12101218.

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The Sungun Cu-Mo porphyry deposit forms part of the Ahar–Arasbaran Magmatic Belt (AAMB). Its host Miocene porphyry stock is quartz monzonitic in composition and is cut by intermediate dykes that post-date mineralization. These dykes contain pyroxene and enclaves of ambiguous origin. Dykes of microdiorite are observed within quartz diorite dykes, whereas later diorite dykes contain three different kinds of enclaves (diorite, quartz diorite and hornfels) of sizes between 1 and 10 cm. Enclaves consist of plagioclase, hornblende and biotite, with accessory sphene, quartz and apatite. Chlorite comp

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22

Acton, S. L., P. S. Simony, and L. M. Heaman. "Nature of the basement to Quesnel Terrane near Christina Lake, southeastern British Columbia." Canadian Journal of Earth Sciences 39, no. 1 (2002): 65–78. http://dx.doi.org/10.1139/e01-056.

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The character of the Paleozoic basement of Quesnel Terrane and the position of the terrane accretion surface that separates Quesnel and Kootenay terranes from rocks of the ancient North American margin are subjects of debate. To address these problems, detailed mapping and UPb geochronologic studies were carried out in the Christina Lake area to define the relationship of the Mollie Creek assemblage, Josh Creek diorite, and Fife diorite to similar lithologies in the Greenwood Grand Forks and Rossland regions, and to place limits on the ages of regional deformation and local position of the

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23

Ouyang, Yuan, Wunian Yang, Hanxiao Huang, Hong Liu, Jianlong Zhang, and Jianhua Zhang. "Metallogenic Dynamics Background of Ga’erqiong Cu-Au Deposit in Tibet, China." Earth Sciences Research Journal 21, no. 2 (2017): 59–65. http://dx.doi.org/10.15446/esrj.v21n2.65192.

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The Ga’erqiong Cu-Au deposit, which sits on the north side of the Coqên-Xainzamagmatite belt, is a large-scale skarn-type deposit, whose ore body has formed in the skarn zone in the contact part of quartz diorite and marble of Duoai formation or the cracks of quartz diorite. Its mineralization is closely related to quartz diorite. And granite porphyry-related molybdenum ore still exists in its deep part. Currently, there are disputes about the metallogenic dynamics background of this deposit. From previous studies, this paper carried out zircon LA-LCPMS U-Pb dating and petrogeochemistry study

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24

Yang, Ze-Yu, Shan-Shan Li, Mao-Guo An, et al. "Petrogenesis of Alkaline Complex of the Longbaoshan Rare Earth Element Deposit in the Luxi Block, North China Craton, China." Minerals 12, no. 12 (2022): 1524. http://dx.doi.org/10.3390/min12121524.

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The alkaline complex in the southwest region of Luxi Terrane of the North China Craton is spatially correlated with the newly discovered Longbaoshan REE deposit. Its petrogenesis, however, remains ambiguous. In this study, we present an integrated petrology, whole-rock geochemistry, sphene U-Pb and rare earth element data from the Longbaoshan alkaline complex to investigate the petrogenesis, magma source and tectonic evolution. The Longbaoshan alkaline complex consists of mafic to intermediate rocks of hornblende diorite and alkaline hornblende syenite porphyry, biotite monzonite porphyry and

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25

Znamensky, S. E. "Geochemistry and Petrogenesis of Igneous Rocks of the Kutuevsky Au-Cu Porphyry Ore Occurrence (Southern Urals)." Georesources 27, no. 1 (2025): 194–207. https://doi.org/10.18599/grs.2025.1.6.

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The petrological and geochemical features of effusive and intrusive rocks of the Kutuevsky Au-Cu porphyry ore occurrence located in the zone of the Main Ural Fault in the Southern Urals were studied. The composition of the rocks was determined by chemical analysis, mass spectrometry with inductively coupled plasma on an ELAN 9000 quadrupole mass spectrometer, and also partially by atomic emission spectrometry with inductively coupled plasma on an ICPE-9000 spectrometer. It has been established that the Au-Cu-porphyry mineralization of the ore occurrence is associated with an volcano-intrusive

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El-Bialy, Mohammed Z., Mohamed Z. Khedr, Bassil M. El-Bialy, and Hatem F. Hassan. "Continental Arc Plutonism in a Juvenile Crust: The Neoproterozoic Metagabbro-Diorite Complexes of Sinai, Northern Arabian-Nubian Shield." Minerals 14, no. 2 (2024): 145. http://dx.doi.org/10.3390/min14020145.

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Based on new field, petrographic, and whole-rock geochemistry data, we investigated three discrete metagabbro-diorite complexes (MGDC) across the E-W Sinai to contribute to increasing knowledge of the evolution of the juvenile continental crust of the Neoproterozoic Arabian–Nubian Shield. The three MGDCs vary in the dominance of the gabbroic versus dioritic rock types among each of them. Gabbroids are distinguished into pyroxene-hornblende gabbros and hornblende gabbros, whereas dioritic rocks have been subdivided into diorites and quartz diorites. The studied MGDC rocks are almost metaluminou

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Bekeshev, Amirbek, Anton Mostovoy, Yulia Kadykova, Marzhan Akhmetova, Lyazzat Tastanova, and Marina Lopukhova. "Development and Analysis of the Physicochemical and Mechanical Properties of Diorite-Reinforced Epoxy Composites." Polymers 13, no. 15 (2021): 2421. http://dx.doi.org/10.3390/polym13152421.

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The aim of this paper is to study the effect of a polyfunctional modifier oligo (resorcinol phenyl phosphate) with terminal phenyl groups and a dispersed mineral filler, diorite, on the physicochemical and deformation-strength properties of epoxy-based composites. The efficiency of using diorite as an active filler of an epoxy polymer, ensuring an increase in strength and a change in the physicochemical properties of epoxy composites, has been proven. We selected the optimal content of diorite both as a structuring additive and as a filler in the composition of the epoxy composite (0.1 and 50

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Savko, К. А., А. V. Samsonov, Е. Kh Korish, et al. "Granitoid intrusions at the periphery of Kursk block as a part of Paleoproterozoic silica large igneous province at the Eastern Sarmatia." Petrologiâ 32, no. 6 (2024): 647–78. https://doi.org/10.31857/s0869590324060018.

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At the eastern border of the Archean Kursk block of Sarmatia the Paleoprotorozoic 2.04–2.08 Ga diorite-granodiorite magmatism is widespread. The intrusive massifs granitoids are metaluminous calc-silica I-type rocks enriched with incoherent elements (LILE and LREE) with negative Ti, P and Nb anomalies. They have wide variety of εNd(T) values in rocks and εHf(T) values in zircons, and vary greatly in melt origin depths with the heterogenous Archean lower crust mafic sources. The diorites have the less radiogenic ancient crustal sources. Granodiorites have Paleo- and Mesoarchean and more juvenil

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Mikhalsky, Eugene V., and John W. Sheraton. "Association of dolerite and lamprophyre dykes, Jetty Peninsula (Prince Charles Mountains, East Antarctica)." Antarctic Science 5, no. 3 (1993): 297–307. http://dx.doi.org/10.1017/s0954102093000392.

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A compositionally varied swarm of mafic dykes in the Jetty Peninsula area was emplaced about 320 Ma ago (K-Ar age). There are three major groups: Group 1 dykes range from transitional-alkaline dolerites to camptonites, Group 2 are trachydolerites, and Group 3 are diorite to quartz diorite porphyries. Group 1 dykes have very similar ratios of most incompatible elements and were derived from the same (or a very similar) enriched lithospheric mantle source region (∈Nd −0.18 to −3.05) with high Nb and Ta (i.e., OIB, ocean island basalt, characteristics). However, the presence of several distinct s

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30

Gou, Zong-Yang, Hao-Cheng Yu, Kun-Feng Qiu, et al. "Petrogenesis of Ore-Hosting Diorite in the Zaorendao Gold Deposit at the Tongren-Xiahe-Hezuo Polymetallic District, West Qinling, China." Minerals 9, no. 2 (2019): 76. http://dx.doi.org/10.3390/min9020076.

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The newly discovered Zaorendao gold deposit is in the Tongren-Xiahe-Hezuo polymetallic district in the westernmost West Qinling orogenic belt. The estimated pre-mining resource is approximately 13.6 t of Au at an average grade of 3.02 g/t. Mineralization is predominantly controlled by NW-trending and EW-trending faults within diorite intrusions and surrounding sedimentary rocks. In the present study, in situ zircon U–Pb geochronology and Lu–Hf isotopic analyses of the ore-hosting diorite at Zaorendao were measured using LA-ICP-MS. The data suggest that the diorite was emplaced at ca. 246.5 ± 1

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Ye, Guo, Guangzhou Mao, Qinglin Xu, et al. "Petrogenesis of the Early Cretaceous Tietonggou Diorite and Its Geological Implications." Minerals 14, no. 4 (2024): 390. http://dx.doi.org/10.3390/min14040390.

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The Tietonggou pluton is mainly composed of gabbroic diorite and diorite. The petrology, zircon U-Pb age, and geochemistry of the Tietonggou diorite have been studied to determine its petrogenesis and metallogenic significance. The diorite samples have 56–58 wt% SiO2 and 11–14 wt% Al2O3 and are peraluminous and sodic (Na2O/K2O = 1.29–2.07). All the samples are enriched in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs; e.g., Rb, Ba, and Sr) but depleted in heavy rare earth elements (HREEs) and high field strength elements (HFSEs; e.g., Zr, Nb, and Ta), suggesting su

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Xia, Fang, Shunda Li, Lingling Gao, and Chuan Chen. "Geochemistry, Zircon U–Pb Ages, and Hf Isotopes of the Devonian Mafic and Acidic Dykes of the Jinba Gold Deposit, NW China: Petrogenesis and Tectonic Implications." Minerals 12, no. 7 (2022): 871. http://dx.doi.org/10.3390/min12070871.

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The Jinba deposit is an orogenic gold deposit located in the Markakuli shear zone, in the southern part of the Altay orogenic belt, northwestern China. Several granite and diorite dykes are present in the area of the mine, with ore bodies occurring in the diorite dykes. However, the diagenetic age, genesis, and evolution of these magmas, and the tectonic setting of the dyke emplacement process, remain unclear. The present study is based on a detailed geological survey, zircon U–Pb dating, Lu–Hf isotopes, and geochemical analysis of the granitic and diorite dykes. The crystallization ages of th

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Song, Jian, Xianzhi Pei, Zuochen Li, et al. "The Initial Subduction Time of the Proto-Tethys Ocean in the Eastern Section of the East Kunlun Orogen: The Constraints from the Zircon U-Pb Ages and the Geochemistry of the Kekesha Intrusion." Minerals 15, no. 2 (2025): 127. https://doi.org/10.3390/min15020127.

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The Cambrian period marks a crucial phase in the initial subduction of the Proto-Tethys Ocean beneath the East Kunlun Orogen. Studying the I-type granites and mafic–ultramafic rocks formed during this period can provide valuable insights into the early Paleozoic tectonic evolution of the region. This paper incorporates petrology, LA-ICP-MS zircon U-Pb geochronology, and whole-rock major and trace element data obtained from the Kekesha intrusion in the eastern section of the East Kunlun Orogen. The formation age, petrogenesis, and magmatic source region of the intrusion are revealed, and the ea

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Zamanian, Hassan, and Behrooz Asadollahi. "Geochemistry and ore potential of the Almoughlagh batholith, western Iran." Geologos 19, no. 3 (2013): 229–42. http://dx.doi.org/10.2478/logos-2013-0014.

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Abstract The Almoughlagh batholith intruded the dioritic Baba Ali pluton during the Oligo-Miocene; the pluton and is now exposed as a big enclave within the batholith. The pluton intruded the Songhor Series during the Late Kimmeridgian (~136 Ma) orogeny. The intrusion by the batholith transformed the diorite to metadiorite and the impure carbonate units of the Songhor Series. The batholith consists of rock types such as quartz syenite and syenogranite, which have a low average quartz content, and which are metaluminous to peraluminous and calc-alkaline in composition. Comparison of the composi

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Udoratina, О. V., М. A. Coble, A. S. Shuyskiy, and V. A. Kapitanova. "MAFIC INCLUSIONS (SOBSKY COMPLEX, POLAR URAL): U‐Pb (SIMS) DATA." Geodynamics & Tectonophysics 10, no. 2 (2019): 265–88. http://dx.doi.org/10.5800/gt-2019-10-2-0414.

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The rocks of the Sobsky complex, composing the bulk of the Sobsky batholith in the Polar Urals, contain mafic inclusions. The geological, petrographic and petro‐geochemical data show that the mafic inclusions of the Sobsky rocks belong to igneous formations, which are similar in their characteristics to autoliths. According to all the characteristics, these are the structures non‐contrasting to host rocks and having different structural‐textural features, a more basic composition of minerals and a more basic composition of rocks. The contact with the rocks of the complex is sharp and clear. Th

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Sutarto, Sutarto, Arifudin Idrus, Sapto Putranto, et al. "HYDROTHERMAL ALTERATION AND VEIN TYPES OF THE RANDU KUNING PORPHYRY Cu-Au DEPOSIT AT SELOGIRI AREA, WONOGIRI." Buletin Sumber Daya Geologi 9, no. 1 (2014): 48–61. http://dx.doi.org/10.47599/bsdg.v9i1.121.

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Many Tertiary hydrothermal altered dioritic composition intrusive rocks were found at the Randu Kuning area and its vicinity, Selogiri, including hornblende microdiorite, hornblende-pyroxene diorite and quartz diorite. The hydrothermal fluids which responsible for the alteration and mineralization at the area is associated with the occurence of the horblende microdiorite intrusion. The alteration zone at the Randu Kuning area and its vicinity can be divided intoseveral hydrothermal alteration zones, such as potassic (magnetite-biotite-K feldspar), prophyllitic (chlorite-magnetite-epidote-carbo

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Gabo-Ratio, J. A. S., K. D. Jabagat, O. B. Soberano, K. Yonezu, and Y. H. Lee. "Geochemistry and geochronology of intrusive units in the Suyoc epithermal deposit: Constraints on magma fertility in the Mankayan Mineral District, Philippines." IOP Conference Series: Earth and Environmental Science 1071, no. 1 (2022): 012021. http://dx.doi.org/10.1088/1755-1315/1071/1/012021.

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Abstract The Mankayan Mineral District in northern Luzon, Philippines is host to world-class Cu-Au hydrothermal deposits such as the Far Southeast porphyry copper deposit and the Lepanto, Victoria, and Teresa epithermal deposits. It also hosts the Suyoc epithermal prospect in the southern portion of the district. This study focuses on the petrography, whole rock geochemistry, mineral chemistry and U-Pb dating of the three massive batholitic intrusive units (gabbro-diabase basement, tonalite-granodiorite, and hornblende quartz diorite) in Suyoc. U-Pb dating results reveal that the tonalite is L

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Liu, Huanan, Feng Yuan, Shengjin Zhao, Mingjing Fan, and Xiangguo Guo. "SHRIMP U–Pb Zircon Ages, Geochemistry and Sr–Nd–Hf Isotope Systematics of the Zalute Intrusive Suite in the Southern Great Xing’an Range, NE China: Petrogenesis and Geodynamical Implications." Minerals 10, no. 10 (2020): 927. http://dx.doi.org/10.3390/min10100927.

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An integrated zircon geochronological, elemental geochemical, and Sr–Nd–Hf isotopic investigation was carried out on a suite of dioritic–granitic rocks at Zalute in the southern Great Xing’an Range (SGXR), NE China, in order to probe the source and petrogenesis of these granitoid rocks and further constrain the geodynamical setting of early Early Cretaceous magmatism. The results of Sensitive High-Resolution Ion Micro Probe (SHRIMP) zircon U–Pb dating reveal that the Zalute dioritic–granitic rocks have a consistent crystallization age of ca. 137–136 Ma, consisting of quartz diorite (136 ± 1.4

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Norbu, Namkha, Jinchao Li, Yuegao Liu, Qunzi Jia, and Huilei Kong. "Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai–Tibetan Plateau, China." Minerals 10, no. 11 (2020): 950. http://dx.doi.org/10.3390/min10110950.

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The Gayahedonggou magmatic Cu-Ni sulfide deposit was recently discovered in the East Kunlun orogenic belt (Northern Tibetan Plateau, China). The mineralization in this region is associated with mafic–ultramafic intrusions. To date, the formation age and metallogenic model of these ore-bearing intrusions have not been studied systematically. In this paper, the petrology, zircon U-Pb chronology, and geochemistry of ore-bearing wehrlite and quartz diorite are investigated. The results show that the zircon U-Pb isotopic age of wehrlite is 419.9 ± 1.5 Ma with an average εHf(t) value of 3.0, indicat

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Mytrokhyn, O., V. Bakhmutov, A. Aleksieienko, T. Mytrokhina, and O. Marushchenko. "INTRUSIVE-MAGMATIC COMPLEXES OF WILHELM ARCHIPELAGO, WEST ANTARCTICA (PART 1 – INTRUSIONS OF GABBROIDS, DIORITES AND GRANITOIDS)." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 4(95) (2021): 6–15. http://dx.doi.org/10.17721/1728-2713.95.01.

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The Wilhelm Archipelago and the adjacent coast of Graham Land are typical areas of calc-alkaline magmatism associated with the protracted evolution of the Antarctic Peninsula igneous belt. The authors studied intrusive complexes of the Wilhelm Archipelago (WA) in order to characterize their geographical distribution, geological occurrence and age, mineralogical and petrographical features. Geological surveys revealed that gabbro, diorite, and granitoid intrusions are widespread on the WA. Due to the processes of tectonic uplift and exhumation, both apical and bottom parts of individual intrusi

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Harjanto, Agus, Sutanto Sutanto, Sutarto Sutarto, et al. "Alterasi Akibat Proses Hidrothermal di Bolaang Mongondow, Provinsi Sulawesi Utara." EKSPLORIUM 37, no. 1 (2016): 27. http://dx.doi.org/10.17146/eksplorium.2016.37.1.2666.

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Bolaang Mongondow terletak di bagian tengah lengan utara Sulawesi yang disusun oleh busur magmatik berumur Neogen dan berpotensi mengandung mineral-mineral ekonomis. Hal tersebut yang melatarbelakangi dilakukan penelitian terhadap potensi sumber daya mineral. Tujuan penelitian adalah untuk mempelajari alterasi akibat proses hidrotermal serta hubungannya dengan cebakan emas (Au) berdasarkan kajian di lapangan maupun analisis laboratorium. Metode yang digunakan dalam penelitian, yaitu kajian literatur, survei geologi, pengambilan conto batuan, analisis laboratorium, dan pengolahan data. Daerah p

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Wu, Chu, Chengxi Wang, Tao Hong, et al. "Constraints on the Formation of the Shiwu Porphyry Cu–Au Deposit in West Junggar, NW China: Insights from Tourmaline-Rich Igneous Rocks." Minerals 13, no. 5 (2023): 612. http://dx.doi.org/10.3390/min13050612.

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Tourmaline tends to occur in porphyry Cu–Au deposits as an alteration or gangue mineral. However, abundant primary tourmalines in miarolitic cavities or interstitially distributed with other silicate minerals have been found in the Shiwu porphyry Cu–Au deposit in West Junggar, NW China. These tourmalines are normally accompanied by pyrite and have a high affinity for Cu and Au mineralization. A combined study of the petrology, geochronology, isotope, and mineral geochemistry data of the tourmaline-rich igneous rocks and the wallrock of tourmaline-poor pyroxene diorite has been completed. The l

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Wang, Xinfu, Bo Li, Guo Tang, Zhen Lei, and He Chang. "Petrogenesis and Metallogenesis of Granitoids in the Yangla Cu-W Polymetallic Deposit, Southwest China: Evidence from Zircon Trace Elements and Hf Isotope." Minerals 12, no. 11 (2022): 1427. http://dx.doi.org/10.3390/min12111427.

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Magmatic zircon tends to present characteristic trends in trace element compositions in response to magma petrogenesis and metallogenesis, such that zircon may provide a window into melt evolution not accessible by whole rock chemistry. The Yangla large Cu deposit is located in the central part of the Jinshajiang Suture Zone, southwest China, constrained between the Jinshajiang and Yangla Faults. In this study, the trace elements and hafnium isotopic compositions of zircons from quartz diorite were studied. Previous published relevant data of Yangla granitoid plutons (i.e., dioritic enclave, g

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A. Brako, Blestmond, Gordon Foli, Kofi Adomako Ansah, Derrick Aikins, Solomon Dery, and Simon K. Y. Gawu. "PETROGRAPHY AND GEOCHEMISTRY OF SOME PALEOPROTEROZOIC GRANITOIDS AT THE NORTH-EASTERN MARGIN OF THE KUMASI BASIN IN GHANA." Earth Science Malaysia 4, no. 2 (2020): 118–26. http://dx.doi.org/10.26480/esmy.02.2020.118.126.

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This study investigates basin-type granitoid samples from the north-eastern margin of the Kumasi Basin in Ghana to establish their source and geodynamic setting. Petrographic analysis, TAS and A/NK-A/CNK plots classify the granitoids as metaluminous quartz diorite, metaluminous granodiorite, and peraluminous monzogranite; and exhibiting I-type signatures. These rocks are formed by magma differentiation and/or partial melting at various stages. Distribution patterns of incompatible elements and the positive Eu/Eu* anomalies of 1.15 and 1.47 exhibited by quartz diorite and granodiorite, respecti

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45

Grammatikopoulos, A. L., Sandra M. Barr, P. H. Reynolds, and R. Doig. "Petrology and age of the Mechanic Settlement Pluton, Avalon terrane, southern New Brunswick." Canadian Journal of Earth Sciences 32, no. 12 (1995): 2147–58. http://dx.doi.org/10.1139/e95-167.

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The Mechanic Settlement Pluton, located at the northern margin of the Caledonian Highlands in southern New Brunswick, is composed of rocks ranging from ultramafic (lherzolite, plagioclase-bearing lherzolite) through mafic (mainly olivine gabbronorite and gabbro) to intermediate (quartz diorite and monzodiorite). Spatial distribution of these lithologies, textural features, and geochemistry are consistent with evolution of a tholeiitic mafic parent magma by crystal fractionation processes, with some evidence for magma mingling between evolved gabbroic and quartz dioritic magmas. The dioritic ro

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Ivanov, Plamen, Rosen Nankin, and Miroslav Krastanov. "Point load strength of granodiorites from the Plana pluton." Engineering Geology and Hydrogeology 32, no. 1 (2018): 49–56. http://dx.doi.org/10.52321/igh.32.1.49.

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The studied area is located in the southeast parts of the Plana Mountain. It is built up of Plana diorite pluton, represented by granodiorites, quartz-diorites and quartz-monzonites, which is located among the older (Precambrian) metamorphic rocks (gneisses, amphibolites, schists and fillites). Plana Pluton is part of Tsentralnosrednogorska magmatic province. The aim of the present work is to clarify the physico-mechanical properties of rocks from the Plana pluton in the area of village of Gorni Okol. For this purpose the values of Point load strength index Is(50), water absorption, bulk densi

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Jin, Lijie, Jilin Wang, Pinrui Qin, et al. "Petrogenesis of Diorite-Porphyrite in the Southern Xintai Area of the Mid-Western Shandong Peninsula, North China Craton: Insights from Geochronology, Mineralogy, Geochemistry, and Sr-Nd-Hf Isotopes." Minerals 14, no. 12 (2024): 1220. https://doi.org/10.3390/min14121220.

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The Early Cretaceous intermediate intrusive rocks have important significance in understanding the crust–mantle interaction, iron mineralization, and tectonic evolution in the western Shandong Peninsula. In this study, we present new zircon U–Pb ages, and Hf isotope, whole-rock geochemistry, Sr–Nd isotopes, and the mineral chemistry of the diorite-porphyrite in the southern Xintai area, mid-western Shandong Peninsula. The diorite-porphyrite formed at ca. 125 Ma. They have intermediate SiO2 (59.57–62.29 wt.%) and MgO (2.78–3.58 wt.%) contents, high Mg# values (53–56), high Sr (589–939 ppm) and

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Key, C. H. "Geochemistry of diorites and associated plutonic rocks of SE Jersey, Channel Islands." Mineralogical Magazine 51, no. 360 (1987): 217–29. http://dx.doi.org/10.1180/minmag.1987.051.360.04.

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AbstractThe plutonic complex in SE Jersey consists of a late Precambrian gabbro-diorite mass which has been intruded by several granites. The status of the diorites which, like the gabbros, often possess a layered structure, is not clear. New geochemical data, including rare earth and trace element analyses, suggest that acid-basic magma mixing was not responsible for the variety of intermediate rocks. Amphibole-controlled fractional crystallization of hydrous basic magma is also unlikely in view of the REE and HFS (high field strength) element distribution. The model which best fits all the a

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Dilworth, Katherine M., James K. Mortensen, Shane Ebert, Richard M. Tosdal, Moira T. Smith, and Paul Roberts. "Cretaceous reduced granitoids in the Goodpaster Mining District, east central Alaska." Canadian Journal of Earth Sciences 44, no. 9 (2007): 1347–73. http://dx.doi.org/10.1139/e07-014.

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The >5 Moz (1 oz (troy) = 31.103 g) gold veins of the Liese Zone and nearby prospects in the Goodpaster Mining District of east central Alaska are spatially and temporally associated with late-Early to Late Cretaceous reduced granitoids that are divided into a granite suite, tonalite suite, and diorite suite in decreasing age. Synkinematic to postkinematic biotite ± hornblende granite, granodiorite, pegmatite, and two-mica granite with accessory garnet compose the granite suite (109–107 Ma). The tonalite suite (107–103 Ma) forms small to large bodies of postkinematic hornblende–biotite gran

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Dallmeyer, R. David, and R. Damian Nance. "Tectonic implications of 40Ar/39Ar mineral ages from late Precambrian – Cambrian plutons, Avalon composite terrane, southern New Brunswick, Canada." Canadian Journal of Earth Sciences 29, no. 11 (1992): 2445–62. http://dx.doi.org/10.1139/e92-192.

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Within the Avalon composite terrane exposed in southern New Brunswick, late Precambrian, low-grade volcanic–sedimentary sequences are juxtaposed against late Precambrian gneisses (Brookville Gneiss) and older platformal metasedimentary rocks (Green Head Group) along the Caledonia Fault. Both assemblages host petrographically similar suites of calc-alkalic dioritic and granodioritic plutons. Those intruding volcanic–sedimentary sequences (Caledonia terrane) record ca. 615–625 Ma crystallization ages typical of arc-related magmatism throughout the Avalon composite terrane. However, 40Ar/39Ar age

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