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Origin and significance of Early Miocene high-potassium I-type granite plutonism in the East Anatolian plateau (the Taslicay intrusion)

文献类型：期刊论文

作者Topuz, Gultekin4; Candan, Osman3; Zack, Thomas2; Chen, Fukun1; Li, Qiu-Li5
刊名LITHOS
出版日期2019-12-01
卷号348页码:20
关键词High-K granite Sr-Nd-Pb isotopy Zircon O and Hf isotopy East Anatolian plateau NW Iran Turkey
ISSN号0024-4937
DOI10.1016/j.lithos.2019.105210
英文摘要The Early Miocene high-K I-type plutonic rocks constitute the early products of the Neogene to Quaternary magmatism, and the youngest exposed intrusions in the East Anatolian plateau. Here we deal with the petrogenesis of the Early Miocene Taslicay intrusion covering an area of similar to 62 km(2). The intrusion comprises leucogranite, and minor gabbro-monzodiorite and rhyolite porphyry. U-Pb dating of zircons from the leucogranite, monzodiorite and rhyolite porphyry yielded identical igneous crystallization ages of similar to 19 Ma (Early Miocene). According to the modified alkali-lime index, the leucogranite and the rhyolite porphyry are alkali-calcic, while the gabbro-monzodiorite is transitional calcic to calc-alkalic. On variation diagrams, the gabbro-monzodiorite and the leucogranite as well as rhyolite porphyry form distinct bimodal groupings, whereby the leucogranite display well-defined linear differentiation trends, in contrast to the gabbro-monzodiorite. The leucogranite has relatively fractionated rate earth element (REE) patterns with concave-upward shapes and significant negative Eu anomalies; middle REEs are hardly fractionated with respect to heavy REEs. The gabbro-monzodiorite is characterized by high abundances of incompatible elements, slightly fractionated chondrite-normalized REE patterns with feebly negative Eu anomaly. The rhyolite porphyry is compositionally similar to the leucogranite. The geochemical features imply a fractionating mineral assemblage of hornblende, plagioclase and biotite for the leucogranite, and hornblende and plagioclase for the gabbro-monzodiorite. All the rock types display a narrow Sr and Nd isotopic variation (initial Sr-87/Sr-86 = 0.7053 to 0.7065; initial epsilon Nd = -0.5 to -3.8). The leucogranite and rhyolite porphyry exhibit gradually slightly higher initial Sr-87/Sr-86 and lower initial Nd-143/Nd-144 ratios relative to the gabbro-monzodiorite. Similarly, delta O-18 and initial epsilon Hf values of zircons suggest slightly increasing amount of crustal component from the leucogranite to the rhyolite porphyry. The gabbro-monzodiorite is probably related to partial melts from the slightly enriched lithospheric mantle. The magmas of the leucogranite and the rhyolite porphyry, on the other hand, probably resulted from the remelting of a middle- to high-K basic to intermediate rocks, compositionally similar to the gabbro-monzodiorite, and assimilated gradually slightly increasing amount of old high-silica crustal material. Several lines of evidence such as (i) presence of the well-developed dike swarm of rhyolite porphyry at the north eastern margin of the intrusion, (ii) exhumation of the intrusion at the earth's surface by Middle Miocene, (iii) widespread apatite fission tract ages between 22 and 16 Ma from literature, and (iv) the absence of the exposed intrusions younger than the Early Miocene suggest that the Early Miocene represents probably a time of continental extension and exhumation in Eastern Anatolia and NW Iran. (C) 2019 Elsevier B.V. All rights reserved.
WOS关键词COLLISION-RELATED VOLCANISM ; CALC-ALKALINE ; GEOCHEMICAL EVOLUTION ; ISOTOPIC COMPOSITION ; CRUSTAL STRUCTURE ; NORTHWEST IRAN ; ZIRCON ; MAGMATISM ; TURKEY ; MANTLE
资助项目Scientific and Technological Research Council of Turkey[114Y226] ; Turkish Academy of Sciences Young Scientists Award Programme
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000500375700023
出版者ELSEVIER
资助机构Scientific and Technological Research Council of Turkey ; Scientific and Technological Research Council of Turkey ; Turkish Academy of Sciences Young Scientists Award Programme ; Turkish Academy of Sciences Young Scientists Award Programme ; Scientific and Technological Research Council of Turkey ; Scientific and Technological Research Council of Turkey ; Turkish Academy of Sciences Young Scientists Award Programme ; Turkish Academy of Sciences Young Scientists Award Programme ; Scientific and Technological Research Council of Turkey ; Scientific and Technological Research Council of Turkey ; Turkish Academy of Sciences Young Scientists Award Programme ; Turkish Academy of Sciences Young Scientists Award Programme ; Scientific and Technological Research Council of Turkey ; Scientific and Technological Research Council of Turkey ; Turkish Academy of Sciences Young Scientists Award Programme ; Turkish Academy of Sciences Young Scientists Award Programme
源URL[http://ir.iggcas.ac.cn/handle/132A11/95815]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Topuz, Gultekin
作者单位1.Univ Sci & Technol China, Sch Earth Sci, Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden
3.Dokuz Eylul Univ, Jeol Muhendisligi Bolumu, Tinaztepe Yerleskesi, Izmir, Turkey
4.Istanbul Tech Univ, Avrasya Yer Bilimleri Enstitusu, TR-34469 Istanbul, Turkey
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Topuz, Gultekin,Candan, Osman,Zack, Thomas,et al. Origin and significance of Early Miocene high-potassium I-type granite plutonism in the East Anatolian plateau (the Taslicay intrusion)[J]. LITHOS,2019,348:20.
APA Topuz, Gultekin,Candan, Osman,Zack, Thomas,Chen, Fukun,&Li, Qiu-Li.(2019).Origin and significance of Early Miocene high-potassium I-type granite plutonism in the East Anatolian plateau (the Taslicay intrusion).LITHOS,348,20.
MLA Topuz, Gultekin,et al."Origin and significance of Early Miocene high-potassium I-type granite plutonism in the East Anatolian plateau (the Taslicay intrusion)".LITHOS 348(2019):20.

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来源：地质与地球物理研究所

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