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Citation: Rui et al., 2020. Geochronology and Geochemistry of Gabbros from Moa-Baracoa Ophiolitic Massif, Eastern Cuba: Implication for Early Cretaceous SSZ Magmatism. Acta Geologica Sinica (English Edition), 94(supp. 1): 47–48. DOI: 10.1111/1755-6724
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Kawag Gibong river, is 210 Ma ± 3 Ma (Early Jurassic) (Leong, 1974). We have added some additional dating to this province, which supports a Jurassic age (Table 3). BULK DENSITY A number of ophiolitic rocks were measured in the laboratory and the
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rodingitized mafic rocks demonstrate substantial removal of Na and as much as three-fold gains in Ca as a consequence ... Based on their bulk chemical composition, the mafic rocks in this suite could be the equivalent of Mesozoic ophiolitic rocks ...
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Further, as it proceeded into the initial arc‐continent collision stage, it was uplifted and became subaerially exposed since ~4 Ma (C. Y. Huang et al., 2006). The newly emerged Hengchun accretionary contains abundant mafic rocks, which vary in their lithology
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rodingitized mafic rocks demonstrate substantial removal of Na and as much as three-fold gains in Ca as a consequence ... Based on their bulk chemical composition, the mafic rocks in this suite could be the equivalent of Mesozoic ophiolitic rocks ...
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Further, as it proceeded into the initial arc‐continent collision stage, it was uplifted and became subaerially exposed since ~4 Ma (C. Y. Huang et al., 2006). The newly emerged Hengchun accretionary contains abundant mafic rocks, which vary in their lithology
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Stanford Libraries'' official online search tool for books, media, journals, databases, government documents and more. Select search scope, currently: catalog all catalog, articles, website, & more in one search catalog books, media & more in the Stanford Libraries'' collections ...
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Lai S C, Zhang G W, Yang Y C, et al. Petrology and geochemistry features of the metamorphic volcanic rocks in mianxian lueyang suture zone, South Qinling. Acta Petrol Sin (in Chinese), 1997, 13(4): 563–573 Google Scholar
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The Hegenshan ophiolite in the Inner Mongolian-Daxinganling Orogenic Belt (IMDOB), northern China, consists of several discontinuous blocks composed dominantly of serpentinized ultramafic rocks with subordinate cumulate gabbros, mafic lavas and dikes, intruded by younger granodiorite dikes. The ultramafic rocks are highly depleted, serpentinized harzburgites with minor dunite, characterized by ...
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Principal Investigator：SANO Sakae, Project Period (FY)：2002 – 2004, Research Category：Grant-in-Aid for Scientific Research (C), Section：, Research Field：Geology KAKEN — Research Projects | Petrochemical study of dismembered ophiolitic rocks from the Kurosegawa and New England Fold Belt (KAKENHI-PROJECT-14540429)
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Mafic and ultramafic rocks in the W Pokot area, NW Kenya are identified as parts of a dismembered ophiolite. They lie within the late Proterozoic Mozambique Belt and are associated with metasediments and calc-alkaline volcanics and intruded by granitic rocks. All these rocks are allochthonous, thrust westwards towards the Archaean Tanzanian Craton. The calc-alkaline volcanics, which are ...
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GEOCHEMISTRY INTERNATIONAL Vol. 48 No. 10 2010 KARAKU et al.S, Table 1. Major element contents of manganese ore samples ac cording to regions (C: Çayirli district, H: Harapa illa r i district, O: Ortabel district) Samples SiO 2 Al 2 O 3 Fe 2 O 3 2 2
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•An early Neoproterozoic collisional event (935–942 Ma) is reported in the Yangtze craton.•Siliceous and carbonaceous mylonitic rocks were deposited in a fore-arc setting.•Mylonitic metasandstone formed in the foredeep.•Detrital zircons show positive eHf(t) values, consistent with ophiolitic rocks.
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1B and C). The zircons from the Armantai ophiolitic mélange have Early Paleozoic SHRIMP U-Pb ages of 481 ± 5 Ma to 489 ± 4 Ma and 503 ± 7 Ma (Jian et al., 2003; Xiao et al., 2008, 2009). The rocks of the Armantai ophiolitic mélange are ...
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The Pliocene El Laco iron deposit is the youngest and best-preserved Kiruna-type deposit in the world, the genesis of which has been on dispute for several decades. The massive magnetite (δ 56 Fe = 0.28–0.39‰, with average value of 0.35‰), the magnetite in the veined magnetite-apatite ores (i.e., veined magnetite; δ 56 Fe = 0.16–0.41‰, with average value of 0.26‰), the magnetite ...
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The Jinshajiang-Ailaoshan-Song Ma Fold Belts preserve the remnants of an important Eastern Paleotethys branch that once separated the South China and Indochina blocks. The fold belts are also of immense economic significance for hosting various
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GEOCHEMISTRY INTERNATIONAL Vol. 48 No. 10 2010 KARAKU et al.S, Table 1. Major element contents of manganese ore samples ac cording to regions (C: Çayirli district, H: Harapa illa r i district, O: Ortabel district) Samples SiO 2 Al 2 O 3 Fe 2 O 3 2 2
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rodingitized mafic rocks demonstrate substantial removal of Na and as much as three-fold gains in Ca as a consequence ... Based on their bulk chemical composition, the mafic rocks in this suite could be the equivalent of Mesozoic ophiolitic rocks ...
Get pricePrincipal Investigator：SANO Sakae, Project Period (FY)：2002 – 2004, Research Category：Grant-in-Aid for Scientific Research (C), Section：, Research Field：Geology KAKEN — Research Projects | Petrochemical study of dismembered ophiolitic rocks from the Kurosegawa and New England Fold Belt (KAKENHI-PROJECT-14540429)
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Based on their bulk chemical composition, the mafic rocks in this suite could be the equivalent of Mesozoic ophiolitic rocks in the more external parts of the Alps. Analyses for major, minor, and trace element contents of metamorphosed, variably rodingitized mafic rocks demonstrate substantial removal of Na and as much as three-fold gains in Ca as a consequence of rodingitization.
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The Fanos granite, a Jurassic pluton composed of high silica fine- to coarse-grained leucogranites, is associated with and intrudes the Mesozoic Guevgueli ophiolitic complex. Discriminant diagrams indicate a collision related plate tectonic environment for the rocks studied. They are peraluminous with calc-alkaline affinities. Major and trace element behaviour suggest a fractional ...
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Petrology and Geochemistry of Ophiolitic Host Rocks of Copper Mineralization in Dowlat Abad-Tang e Hana Area (Neyriz-Iran) () Pedram Attarzadeh 1*, Mohammad Yazdi 2, Mehrdad Karimi 3, Kamal Noori Khankahdani 3
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origin of these Neoproterozoic oceanic rocks. Using the geochemistry of thepillowlavas, Farahatetal.(2004) proposed anensialicback-arcbasin setting for ophiolitic rocks in the CED, including the WGO. The ANS ophiolitic mantle is composed mainly of tectonized
Get priceYang P, Huang Q, Zhou R, Kapsiotis A, Xia B, Ren Z, Cai Z, Lu X, Cheng C. Geochemistry and Geochronology of Ophiolitic Rocks from the Dongco and Lanong Areas, Tibet: Insights into the Evolution History of the Bangong-Nujiang Tethys Ocean. Minerals
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1B and C). The zircons from the Armantai ophiolitic mélange have Early Paleozoic SHRIMP U-Pb ages of 481 ± 5 Ma to 489 ± 4 Ma and 503 ± 7 Ma (Jian et al., 2003; Xiao et al., 2008, 2009). The rocks of the Armantai ophiolitic mélange are ...
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Petrology and Geochemistry of Ophiolitic Host Rocks of Copper Mineralization in Dowlat Abad-Tang e Hana Area (Neyriz-Iran) () Pedram Attarzadeh 1*, Mohammad Yazdi 2, Mehrdad Karimi 3, Kamal Noori Khankahdani 3
Get priceGeochemistry of the mafic rocks of the ophiolitic fold and thrust belts of southern Ethiopia: constraints on the tectonic regime during the Neoproterozoic (900–700 Ma) B. Yibasa,1, W.U. Reimolda,∗, C.R. Anhaeussera, C. Koeberlb. aSchool of Geosciences, University of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South Africa.
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· Metamorphosed volcanic rocks can be divided into two groups in terms of their REE geochemistry and trace element ratios of Ti/V, Th/Ta, Th/Yb and Ta/Yb. One is the MORB-type basalt with LREE depletion, representing the fragments of oceanic crust and implying an association of the MORB-type ophiolite and an ancient ocean basin between theQinling and Yangtze plates during the …
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Geochemistry of the mafic rocks of the ophiolitic fold and thrust belts of southern Ethiopia: constraints on the tectonic regime during the Neoproterozoic (900-700 Ma) B. Yibas, W.U. Reimold, C.R. Anhaeusser, C. Koeberl
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•An early Neoproterozoic collisional event (935–942 Ma) is reported in the Yangtze craton.•Siliceous and carbonaceous mylonitic rocks were deposited in a fore-arc setting.•Mylonitic metasandstone formed in the foredeep.•Detrital zircons show positive eHf(t) values, consistent with ophiolitic rocks.
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PDF | On Jan 1, 2016, Pedram Attarzadeh and others published Petrology and Geochemistry of Ophiolitic Host Rocks of Copper Mineralization in Dowlat Abad-Tang e Hana Area ...
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· The mafic rocks of the Bulbul Belt consistently exhibit high-Ti, high-K calc-alkaline basaltic geochemistry, similar to that reported from the Kenticha Belt. Several samples from the Geleba area and Moyale-El Kur Belt also show high-K, high-Ti calc-alkaline geochemistry.
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· P–T conditions of c. 6 ± 1.5 kbar and 630–770 C have been calculated for the metamorphism of amphibolites from the uppermost part of the sub-ophiolitic rock pile by conventional geothermobarometric calculations, suggesting that the metamorphic sole rocks
Get priceThere are four Neoproterozoic ophiolitic belts in southern Ethiopia-Megado, Kenticha, Moyale-El Kur and Bulbul. The mafic rocks, which form the bulk of these belts, are dominantly subalkaline, low-K, low-Ti tholeiitic basalts (LOTI). This study, for the first time, shows occurrences of boninites in the Moyale-El Kur Belt and in the Geleba area, in addition to the already known occurrence in ...
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· The TTKH and TBB ophiolitic belts are dismembered parts of different ophiolitic belts which represent relics of Ordovician oceanic floor; they subducted to the north under the Chingiz–Tarbahatai arc and to the south under the Junggar plate, respectively. The
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There are four Neoproterozoic ophiolitic belts in southern Ethiopia—Megado, Kenticha, Moyale-El Kur and Bulbul. The mafic rocks, which form the bulk o…
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Kanigiri ophiolitic m´elange (KOM) is located near the central part of the NSB, sandwiched between Udayagiri and Vinjamuru groups. Plagiogranite and gabbro from this ophiolitic m´elange has been dated back to 1330 Ma (Vijaya Kumar et al. 2006; DharmaRao
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Geochemistry of the mafic rocks of the ophiolitic fold and thrust belts of southern Ethiopia: constraints on the tectonic regime during the Neoproterozoic (900-700 Ma) B. Yibas, W.U. Reimold, C.R. Anhaeusser, C. Koeberl
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· Geochemistry of the mafic rocks of the ophiolitic fold and thrust belts of southern Ethiopia: constraints on the tectonic regime during the Neoproterozoic (900-700 Ma) Yibas, B. Reimold, W. U.
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There are four Neoproterozoic ophiolitic belts in southern Ethiopia-Megado, Kenticha, Moyale-El Kur and Bulbul. The mafic rocks, which form the bulk of these belts, are dominantly subalkaline, low-K, low-Ti tholeiitic basalts (LOTI). This study, for the first time, shows occurrences of boninites in the Moyale-El Kur Belt and in the Geleba area, in addition to the already known occurrence in ...
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