气候变化领域集成服务门户(CCPortal): Metamorphic evolution of high-pressure felsic and pelitic granulites from the Qianlishan Complex and tectonic implications for the Khondalite Belt, North China Craton

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DOI	10.1130/B35502.1;
	Metamorphic evolution of high-pressure felsic and pelitic granulites from the Qianlishan Complex and tectonic implications for the Khondalite Belt, North China Craton
	Wu S.; Yin C.; Davis D.W.; Zhang J.; Qian J.; Qiao H.; Xia Y.; Liu J.
发表日期	2020
ISSN	167606
起始页码	2253
结束页码	2266
卷号	132 期号:2021-11-12
英文摘要	High-pressure felsic granulites in association with pelitic granulites are widely distributed in the Qianlishan Complex of the Khondalite Belt, North China Craton. A link between “inter-layered” felsic and pelitic granulites was established based on comprehensive metamorphic analysis, revealing that they record similar metamorphic stages: peak pressure (M1), post-peak decompression (M2), and late retrograde cooling (M3) stages. Felsic granulites experienced high-pressure metamorphism up to ~12 kbar, while pelitic granulites estimated peak pressure is 11-15 kbar. The decompression stage (M2) is indicated by cordierite + sillimanite symplectite and/or cordierite coronae with conditions of 5.7-6.5 kbar/800-835 °C in pelitic granulites, and by garnet-sillimanite assemblages with conditions of >6.5 kbar/810-865 °C in felsic granulites. The later cooling stage (M3) is marked by sub-solidus biotite-quartz-plagioclase symplectite and later melt crystallization. These mineral assemblages and pressure-temperature (P-T) conditions define clockwise P-T paths involving near-isothermal decompression and near-isobaric cooling, suggesting a continent-continent collisional event. Secondary ion mass spectrometry zircon U-Pb dating yields a consistent metamorphic age of ca. 1.95 Ga, interpreted as peak metamorphism. The results, combined with available data, suggest that the Khondalite Belt formed by collision between the Yinshan and Ordos blocks at ca. 1.95 Ga. © 2020 Geological Society of America
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184850
作者单位	Guangdong Provincial Key Lab of Mineral Resources & Geological Processes, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China; Department of Earth Sciences, University of Toronto, Toronto, Ontario M5S 3B1, Canada
推荐引用方式 GB/T 7714	Wu S.,Yin C.,Davis D.W.,et al. Metamorphic evolution of high-pressure felsic and pelitic granulites from the Qianlishan Complex and tectonic implications for the Khondalite Belt, North China Craton[J],2020,132(2021-11-12).
APA	Wu S..,Yin C..,Davis D.W..,Zhang J..,Qian J..,...&Liu J..(2020).Metamorphic evolution of high-pressure felsic and pelitic granulites from the Qianlishan Complex and tectonic implications for the Khondalite Belt, North China Craton.Bulletin of the Geological Society of America,132(2021-11-12).
MLA	Wu S.,et al."Metamorphic evolution of high-pressure felsic and pelitic granulites from the Qianlishan Complex and tectonic implications for the Khondalite Belt, North China Craton".Bulletin of the Geological Society of America 132.2021-11-12(2020).