Episodic mantle melting-crustal reworking in the late Neoarchean of the northwestern North China Craton: Zircon ages of magmatic and metamorphic rocks from the Yinshan Block
文献类型：期刊论文
| 作者 | Jian, Ping1; Kroener, Alfred1,2; Windley, Brian F.3; Zhang, Qi4; Zhang, Wei1; Zhang, Liqao5 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 222页码:230-254 |
| 关键词 | Greenstone High-grade metamorphic rocks Mg-adakite, high-Mg andesite and sanukitoid Granitoid Neoarchean zircon ages North China Craton |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2012.03.002 |
| 文献子类 | Article |
| 英文摘要 | The Yinshan Block in the northwestern North China Craton comprises late Neoarchean greenstones, high-grade metamorphic rocks (granulite, charnockite, enderbite and amphibole gneiss), diorites (sanukitoid and Mg-adakite) and granitoids (predominantly trondhjemite-tonalite). A greenstone terrane comprises a volcanic sequence of predominant basalt and dacite, with minor andesite. Zircons from a high-Mg andesite and an andesite have weighted mean Pb-207/Pb-206 ages of 2533 +/- 5 Ma and 2510 +/- 7 Ma, respectively, which reflect the timing of two distinct volcanic episodes. These two either predated or postdated a major volcanic episode that formed a basalt-dacite bimodal suite during 2515 +/- 10 (basalt) to 2516 +/- 10 Ma (dacite). Magmatic zircons from the high-grade metamorphic rocks yielded weighted mean Pb-207/Pb-206 ages of 2544 +/- 5 Ma for a mafic granulite, 2521 +/- 6 Ma for a garnetiferous gneiss, 2535 +/- 5 Ma for a charnockite, and 2526 +/- 5 Ma for an amphibole gneiss. These ages reflect the (minimum) emplacement time of rocks that make up the protoliths of the high-grade metamorphic complex. The metamorphic ages of the high-grade complex were determined at 2515 +/- 18 Ma for mafic granulite and 2503 +/- 12 Ma for garnetiferous gneiss. Zircons from a high-Mg diorite (i.e. sanukitoid) have a weighted mean age of 2520 +/- 6 Ma, which is significantly younger than the 2556 +/- 14 Ma age of a magnesian diorite (Mg-adakite) from the same diorite massif. These ages reflect distinctive magmatic pulses that generated the diorite massif. A tonalite has a zircon age of 2516 +/- 7 Ma, indistinguishable from the 2520 +/- 9 Ma age of a trondhjemite from the same trondhjemite/tonalite-dominated batholith. A granitic compositional layer in the 2516 +/- 7 Ma tonalite has zircon ages of 2515 +/- 6 Ma (high-U zircon domains) and 2512 +/- 22 Ma (low-U zircon domains), which reflect an intracrustal melting event. The presence of an older crustal remnant (ca. >2600 Ma) prior to the formation of the Yinshan Block is indicated by a 2594 +/- 4 Ma leucogranite xenolith in the diorite massif and by the widespread presence of ca. 2583-3485 Ma (mostly, ca. 2700 Ma) zircon xenocrysts in a variety of volcanic and plutonic rocks. An undeformed pegmatite dike in high-Mg andesite has an emplacement age of 2508 +/- 17 Ma (zircon). An undeformed trondhjemite dike that cuts the supracrustal greenstone sequence yielded a zircon age of 2502 +/- 6 Ma, similar to that of the pegmatite dike, and representing the latest Archean magmatic event in the Yinshan Block. These ages of undeformed granitoid dikes delimit the termination of thermo-tectonic development of the Yinshan Block. Based on these new ages and published geological and geochronological data, we conclude that the Yinshan Block is a typical Neoarchean cratonic block, not a segment of the so-called "Paleoproterozoic Inner Mongolia-North Hebei Orogen". Episodic mantle melting and resultant crustal reworking account for the thermo-tectonic development of the Yinshan Block in a brief period (ca. 2556-2502 Ma) in the late Neoarchean, and based on their regional chronological correlations we argue for their craton-scale significance. (c) 2012 Elsevier B.V. All rights reserved. |
| WOS关键词 | TRONDHJEMITE-GRANODIORITE TTG ; ASIAN OROGENIC BELT ; LOWER CONTINENTAL-CRUST ; U-PB ; INNER-MONGOLIA ; TECTONIC EVOLUTION ; GREENSTONE-BELT ; KHONDALITE BELT ; OCEANIC-CRUST ; COMPLEX CONSTRAINS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000313765700012 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Natural Science Foundation of China(40672048 ; Natural Science Foundation of China(40672048 ; 41030314) ; 41030314) ; Natural Science Foundation of China(40672048 ; Natural Science Foundation of China(40672048 ; 41030314) ; 41030314) ; Natural Science Foundation of China(40672048 ; Natural Science Foundation of China(40672048 ; 41030314) ; 41030314) ; Natural Science Foundation of China(40672048 ; Natural Science Foundation of China(40672048 ; 41030314) ; 41030314) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84522]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Jian, Ping |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Geol, SHRIMP Ctr, Beijing 100037, Peoples R China 2.Johannes Gutenberg Univ Mainz, Inst Geowissensch, D-55099 Mainz, Germany 3.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Inner Mongolian Inst Geol, Hohhot 010055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jian, Ping,Kroener, Alfred,Windley, Brian F.,et al. Episodic mantle melting-crustal reworking in the late Neoarchean of the northwestern North China Craton: Zircon ages of magmatic and metamorphic rocks from the Yinshan Block[J]. PRECAMBRIAN RESEARCH,2012,222:230-254. |
| APA | Jian, Ping,Kroener, Alfred,Windley, Brian F.,Zhang, Qi,Zhang, Wei,&Zhang, Liqao.(2012).Episodic mantle melting-crustal reworking in the late Neoarchean of the northwestern North China Craton: Zircon ages of magmatic and metamorphic rocks from the Yinshan Block.PRECAMBRIAN RESEARCH,222,230-254. |
| MLA | Jian, Ping,et al."Episodic mantle melting-crustal reworking in the late Neoarchean of the northwestern North China Craton: Zircon ages of magmatic and metamorphic rocks from the Yinshan Block".PRECAMBRIAN RESEARCH 222(2012):230-254. |
入库方式： OAI收割
来源：地质与地球物理研究所
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