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  4. 岩石圈演化国家重点实验室
Evidence for Archean crust in Iran provided by ca 2.7 Ga zircon xenocrysts within amphibolites from the Sanandaj-Sirjan zone, Zagros orogen

文献类型：期刊论文

作者Shakerardakani, Farzaneh1,2; Li, Xian-Hua1,2,3; Ling, Xiao-Xiao1,2; Li, Jiao1,2; Tang, Guo-Qiang1,2,3; Liu, Yu1,2,3; Monfared, Behzad4
刊名PRECAMBRIAN RESEARCH
出版日期2019-09-15
卷号332页码:12
关键词Neoarchean crust U-Pb geochronology Hf-O isotopes Sanandaj-Sirjan zone Iran
ISSN号0301-9268
DOI10.1016/j.precamres.2019.105390
英文摘要High-precision secondary-ion mass spectrometry (SIMS) U-Pb and Hf-O isotopic microanalyses of zircons from the central Sanandaj-Sirjan metamorphic zone (SSMZ) of the Zagros orogen, Iran, provide evidence of the presence of 2.7 Ga xenocrystic zircons, suggesting that the SSMZ records Neoarchean crustal components that have not previously been reported in Iran. The two amphibolite samples analyzed from the Muteh-Golpaygan metamorphic complex during this study include one sample (GQ-10) that yielded xenocrystic zircons with ages clustered around ca 2.7 Ga. The second sample (GC-15) contains zircons that show two distinct xenocrystic zircon domains with ages of (i) ca 2.7 and 2.5 Ga, and (ii) ca 52 Ma. The ca 2.7 Ga zircons and zircon domains have homogeneous, mantle-like delta O-18 values with a mean of 6.10 +/- 0.69 parts per thousand. They have epsilon Hf(t) values that vary between +0.2 to +6.8 with T-DM(C) ages of 3.1-2.7 Ga, suggesting they crystallized from granitoid melts derived from juvenile components. However, the younger ca 2.5 Ga zircons yield an average delta O-18 value of 6.17 +/- 0.24 parts per thousand and have evolved Hf isotopic compositions (epsilon Hf(t) -0.8 to -3.4; T-DM(C) = 3.2-3.1 Ga), indicating that the older crust in this region underwent more intense later reworking than is the case for crustal material formed at ca 2.7 Ga. These data provide evidence of Neoarchean basement rocks in this region, indicating that the SSMZ records ancient crustal growth events. The youngest ca 52 Ma xenocrystic zircons within these samples most likely reflect the late Paleocene-Eocene magmatic 'flare-up' within Iran. These zircons have slightly elevated delta O-18 values (7.69 +/- 0.21 parts per thousand) and negative Hf isotopic compositions (epsilon Hf(t) -8.3 to -12.1; T-DM(C) = 1.9-1.6 Ga), suggesting intensive crustal reworking at ca 50 Ma.
WOS关键词U-PB AGE ; ARABIA-EURASIA COLLISION ; HF-O ISOTOPES ; NW IRAN ; LU-HF ; NORTHWESTERN CANADA ; TECTONIC EVOLUTION ; NORTHERN GONDWANA ; WORKING REFERENCE ; SAGHAND REGION
资助项目National Key R&D Program of China[2016YFE0203000] ; Chinese Academy of Sciences[QYZDY-SSW-DQC017] ; Chinese Academy of Sciences[XDB18030000] ; Chinese Academy of Sciences
WOS研究方向Geology
语种英语
WOS记录号WOS:000487566500022
出版者ELSEVIER
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/93699]  
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Shakerardakani, Farzaneh; Li, Xian-Hua
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Karl Franzens Univ Graz, NAWI Graz Geoctr, Dept Petr & Geochem, Univ Pl 2, A-8010 Graz, Austria
推荐引用方式
GB/T 7714		 Shakerardakani, Farzaneh,Li, Xian-Hua,Ling, Xiao-Xiao,et al. Evidence for Archean crust in Iran provided by ca 2.7 Ga zircon xenocrysts within amphibolites from the Sanandaj-Sirjan zone, Zagros orogen[J]. PRECAMBRIAN RESEARCH,2019,332:12.
APA Shakerardakani, Farzaneh.,Li, Xian-Hua.,Ling, Xiao-Xiao.,Li, Jiao.,Tang, Guo-Qiang.,...&Monfared, Behzad.(2019).Evidence for Archean crust in Iran provided by ca 2.7 Ga zircon xenocrysts within amphibolites from the Sanandaj-Sirjan zone, Zagros orogen.PRECAMBRIAN RESEARCH,332,12.
MLA Shakerardakani, Farzaneh,et al."Evidence for Archean crust in Iran provided by ca 2.7 Ga zircon xenocrysts within amphibolites from the Sanandaj-Sirjan zone, Zagros orogen".PRECAMBRIAN RESEARCH 332(2019):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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