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Zircon U-Pb and titanite U-Th-Pb ages of the Ghorveh mixed granitoid pluton: Implications for the Late Jurassic supra-subduction extension of the Sanandaj-Sirjan Zone, Iran

文献类型：期刊论文

作者Wang, Zhong-Mei4; Han, Chun-Ming2,3; Xiao, Wen-Jiao1,2; Zhang, Zhi-Yong1
刊名GEOLOGICAL JOURNAL
出版日期2022-09-06
页码34
关键词Ghorveh pluton granite monzodiorite Sanandaj-Sirjan Zone titanite U-Th-Pb age zircon U-Pb age
ISSN号0072-1050
DOI10.1002/gj.4580
英文摘要The Ghorveh batholith, located in the central part of the Sanandaj-Sirjan Zone (SSZ), Iran, preserves several sequences of Mesozoic plutonic and volcanic rocks. This study presents systematic analyses of the calc-alkaline granites and monzodiorites from the southern part of the Ghorveh pluton. The granites are metaluminous to slightly peraluminous with A/CNK ratios of 0.97-1.02, indicating an A-type granitic affinity. High Rb, Th, and K and low Sr, P, and Ti concentrations indicate an involvement of crustal materials. Whole-rock negative epsilon(Nd)(t) values and relatively high T-DM1 model ages support a continental crustal source. Thus, the granites are of fractionated A-type in composition produced by partial melting of crustal materials. The monzodiorites have incompatible trace element patterns with enrichment in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs) relative to heavy rare earth elements and high-field strength elements. This combined with the high Mg# values and the positive epsilon(Nd) and epsilon(Hf)(t) values, indicate a mantle-derived origin. Dating results show that the granites and monzodiorites have uniform crystallization ages of similar to 150 Ma. Previous results and our new data suggest that the Jurassic subduction of Neo-Tethyan Oceanic crust under the Eurasian continent was followed by slab rollback that induced back-arc extension. Heat transfer from arc magmas increased the degree of decompressional melting in the thinned lithosphere. Melting of the presumably homogeneous crust was concurrent with emplacement of the intermediate composition magmas. Consequently, we propose that the Ghorveh area of the central SSZ developed in a supra-subduction extensional phase during the Late Jurassic.
WOS关键词TRONDHJEMITE-GRANODIORITE TTG ; A-TYPE GRANITOIDS ; S-TYPE GRANITES ; ZAGROS OROGEN ; I-TYPE ; GEOCHEMICAL CHARACTERISTICS ; METAMORPHIC BELT ; TECTONIC REGIME ; MAFIC MAGMATISM ; TRACE-ELEMENTS
资助项目National Natural Science Foundation of China[91755102] ; National Natural Science Foundation of China[91855207] ; National Natural Science Foundation of China[92055213] ; National Natural Science Foundation of China[41822204] ; National Natural Science Foundation of China[41702236] ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station[NORSTY20-04]
WOS研究方向Geology
语种英语
WOS记录号WOS:000850502600001
出版者WILEY
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station ; Shanxi Taiyuan ContinentaL Rift Dynamics National Observation and Research Station
源URL[http://ir.iggcas.ac.cn/handle/132A11/108385]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
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Wang, Zhong-Mei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi, Peoples R China
3.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing, Peoples R China
4.Inst Geol, State Key Lab Earthquake Dynam, China Earthquake Adm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Zhong-Mei,Han, Chun-Ming,Xiao, Wen-Jiao,et al. Zircon U-Pb and titanite U-Th-Pb ages of the Ghorveh mixed granitoid pluton: Implications for the Late Jurassic supra-subduction extension of the Sanandaj-Sirjan Zone, Iran[J]. GEOLOGICAL JOURNAL,2022:34.
APA Wang, Zhong-Mei,Han, Chun-Ming,Xiao, Wen-Jiao,&Zhang, Zhi-Yong.(2022).Zircon U-Pb and titanite U-Th-Pb ages of the Ghorveh mixed granitoid pluton: Implications for the Late Jurassic supra-subduction extension of the Sanandaj-Sirjan Zone, Iran.GEOLOGICAL JOURNAL,34.
MLA Wang, Zhong-Mei,et al."Zircon U-Pb and titanite U-Th-Pb ages of the Ghorveh mixed granitoid pluton: Implications for the Late Jurassic supra-subduction extension of the Sanandaj-Sirjan Zone, Iran".GEOLOGICAL JOURNAL (2022):34.

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来源：地质与地球物理研究所

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