气候变化领域集成服务门户(CCPortal): Geochronology; geochemistry and tectonic significance of the Dashizhai ophiolitic mélange belt; southeastern Xing’an

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DOI	10.1007/s00531-018-1642-6
	Geochronology; geochemistry and tectonic significance of the Dashizhai ophiolitic mélange belt; southeastern Xing’an–Mongolia orogenic belt
	Zhou Z.; Liu C.; Wang G.; Zhang N.; Li H.; Wu C.
发表日期	2019
ISSN	14373254
起始页码	67
结束页码	88
卷号	108 期号:1
英文摘要	The Xing’an–Mongolia orogenic belt places at the southeastern margin of the Central Asian orogenic belt, is important for unraveling the tectonic evolution of the accretionary orogens. The validity of existing models that account for the development and closure of the Paleo-Asian Ocean critically depends on the assumed initial configuration and evolution process of the various microcontinents that were separated by the ophiolitic belts or suture zones, and deep faults. In this work, we present a newly discovered Dashizhai ophiolitic mélange belt in the Ulanhot region, and systematically investigate the occurrence through petrology and geochronology of this ophiolitic mélange. The Dashizhai ophiolitic mélange belt is a typical SSZ-type ophiolitic mélange, has a block-in-matrix structure, the blocks include ophiolitic ultramafic rock, volcanic rock, siliceous rock and gabbro in a matrix of deformed Early Permian slate. Our new geochronology data suggest that the Dashizhai ophiolitic mélange belt should form in the early Permian or younger and emplaced before the late Permian deposition. By focusing on the regional geologic history of the southeastern Xing’an–Mongolia orogenic belt, the Dashizhai ophiolitic mélange belt together with northeast-migrating Hehei fault zone were suggested as the tectonic boundary between the Xing’an and Songliao–Xilinhot blocks. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Dashizhai ophiolitic mélange belt; Geochronology and geochemistry; Late Carboniferous–Early Permian; Xing’an and Songliao–Xilinhot blocks; Xing’an–Mongolia orogenic belt
语种	英语
scopus关键词	Carboniferous; geochronology; igneous geochemistry; melange; ophiolite; orogenic belt; Permian; petrology; tectonic evolution; tectonic setting; China; Guangxi Zhuangzu; Mongolia; Xingan
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147899
作者单位	School of Earth Science and Resources, China University of Geosciences (Beijing), Beijing, 100083, China; Institute of Geological Survey, China University of Geosciences (Beijing), Beijing, 100083, China; Institute of Guangxi Geological Survey, Nanning, Guangxi 530000, China; Institute of Economics, Sichuan University of Science and Engineering, Zigong, Sichuan, China
推荐引用方式 GB/T 7714	Zhou Z.,Liu C.,Wang G.,等. Geochronology; geochemistry and tectonic significance of the Dashizhai ophiolitic mélange belt; southeastern Xing’an–Mongolia orogenic belt[J],2019,108(1).
APA	Zhou Z.,Liu C.,Wang G.,Zhang N.,Li H.,&Wu C..(2019).Geochronology; geochemistry and tectonic significance of the Dashizhai ophiolitic mélange belt; southeastern Xing’an–Mongolia orogenic belt.International Journal of Earth Sciences,108(1).
MLA	Zhou Z.,et al."Geochronology; geochemistry and tectonic significance of the Dashizhai ophiolitic mélange belt; southeastern Xing’an–Mongolia orogenic belt".International Journal of Earth Sciences 108.1(2019).