Origin of Felsic Microgranitoid Enclaves in Granite in Zhangjiakou District,China:Implication for Process and Lifespan of Granitic Magma Chambers

扫码查看

原文链接

国家科技期刊平台
NETL
NSTL
万方数据

外文标题：Origin of Felsic Microgranitoid Enclaves in Granite in Zhangjiakou District,China:Implication for Process and Lifespan of Granitic Magma Chambers

外文摘要：Sparse felsic microgranitoid enclaves(FMEs)in the Shangshuiquan granite of the Zhangjiakou district,the north margin of the North China Craton,are fine-grained,dark-colored and exhibit subangular to subspherical shapes.They share similar mineral assemblages,chemical compositions,and zircon Hf isotope compositions to the host granite.New zircon U-Pb geochronology reveals that the FMEs crystallized at 156-153 Ma,while the Shangshuiquan granite formed at ca.146 Ma.The FEMs are,therefore,10 to 7 Ma older than the host granite.Combined with petrological evidence,we suggest that the FMEs are fragments of rapidly crystalized magmas,which were captured by the younger Shangshuiquan magma.Magmas of the FMEs and Shangshuiquan granite originated from the same reservoir.The Shangshuiquan granite is the result of small batches of magma being built up incrementally,and the FMEs belong to the earlier batches of magma.The lifespan of the Shangshuiquan magma reservoir exceeds 10 Ma.FMEs derived from cogenetic fragments have the potential to offer critical information about the formation process and timescale of granitic plutons.

外文关键词：

felsic microgranitoid enclavesautolithschilled marginslifespan of magma chambernorth margin of the North China Craton

作者：

WANG Dazhao、LIU Yuhang、LENG Chengbiao、ZHEN Shimin、LIU Jiajun、ZHA Zhongjian

展开 >

作者单位：

National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing,Nanchang 330013,China

State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China

Development and Research Center of China Geological Survey,Beijing 100037,China

Technical Guidance Center for Mineral Resources Exploration,Ministry of Natural Resources,Beijing 100083,China

State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences(Beijing),Beijing 100083,China

School of Earth Science and Resources,China University of Geosciences(Beijing),Beijing 100083,China

Institute of Geological Surveying and Mapping Technology of Anhui Province,Hefei 230022,China

展开 >

关键词：

felsic microgranitoid enclaves autoliths chilled margins lifespan of magma chamber north margin of the North China Craton

出版年：

2024

DOI：

10.1111/1755-6724.15183

地质学报(英文版)

中国地质学会

地质学报(英文版)

CSTPCD

影响因子：1.414

ISSN：1000-9515

年,卷(期)：2024.98(6)