Late Jurassic–Early Cretaceous Plutonism in the Northern Part of the Precambrian North China Craton: SHRIMP Zircon U–Pb Dating of Diorites and Granites from the Yunmengshan Geopark, Beijing

Acta Geologica Sinica - Tập 83 Số 2 - Trang 310-320 - 2009
Yuruo Shi1, Xitao Zhao2, Yinsheng Ma3, Daogong Hu3, Qisheng Liu3, Zhenhan Wu3, Tianming Gao4, Dunyi Liu1
1Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
2Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
3Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
4Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

Tóm tắt

Abstract:The Yunmengshan Geopark in northern Beijing is located within the Yanshan range. It contains the Yunmengshan batholith, which is dominated by two plutons: the Yunmengshan gneissic granite and the Shicheng gneissic diorite. Four samples of the Yunmengshan gneissic granite give SHRIMP zircon U–Pb ages from 145 to 141 Ma, whereas four samples of the Shicheng gneissic diorite have ages from 159 Ma to 151 Ma. Dikes that cut the Yunmengshan diorite record SHRIMP zircon U–Pb age of 162±2 and 156±4 Ma. The cumulative plots of zircons from the diorites show a peak age of 155 Ma, without inherited zircon cores, and the peak age of 142 Ma for granite is interpreted as the emplacement age of the Yunmengshan granitic pluton, whose igneous zircons contain inherited zircon cores. The data presented here show that there were two pulses of magmatism: early diorites, followed c13 Ma later by true granites, which incorporated material from an older continental crust.

Từ khóa


Tài liệu tham khảo

Beijing Bureau of Geology and Mineral Resources, 1991, Regional Geology of Beijing Municipality

Davis G.A., 1996, The tectonic evolution of Asia, 253

10.1130/0-8137-1194-0.171

10.1016/j.earscirev.2003.08.001

10.1093/petrology/41.7.933

10.1038/nature03162

Guangyi Ji, 2004, Penological characteristics and structural deformation of Yunmengshan magmatic complex, Beijing Geology, 16, 1

Shuwen Liu, 1991, The theses of North China granite and metallization, 132

Cui Liu, 2004, Zircon SHRIMP dating of Yunmengshan gneissic granite and its geological significance, Acta Petrologica et Mineralogica, 23, 141

Ludwig K.R., 2001, Squid 1.02: a user's manual, 1

Fengxiang Lu, 2000, The main evolution pattern of Phanerozoic mantle in eastern China: the “mushroom cloud” model, Earth Science Frontiers, 7, 97

Jishun Ren, 1980, The Geotectonic and its evolution of China

10.1111/j.1755-6724.2007.tb00947.x

Williams I.S., 1998, U‐Th‐Pb geochromology by ion microprobe, Reviews in Economic Geology, 7, 1

10.1111/j.1755-6724.2000.tb00426.x

Fuyuan Wu, 2003, Discussions on the lithospheric thinning in eastern China, Earth Science Frontiers, 10, 51

Jifeng Xu, 1994, Rock deformation and genesis of Yunmengshan granitic batholith, Earth Science—Journal of China University of Geosciences, 19, 806

Yigang Xu, 1999, Roles of thermo‐mechanic and chemical erosion in continental lithospheric thinning, Bulletin of Mineralogy, Petrology and Geochemistry, 18, 1

Lingsen Zeng, 2006, Geochemical characteristics of leucogranitic dikes and sheared granites in the Yunmeng mountains, northeastern Beijing, Acta Petrologica et Mineralogica, 25, 203

Jianxin Zhang, 1997, Granite dome and extensional tectonics in the Yunmeng mountains, Beijing, Geological Review, 43, 232

Yue Zhao, 2004, Yanshanian movement and conversion of tectonic regimes in east Asia, Earth Science Frontiers, 11, 319

Jianping Zheng, 2007, Physical and chemical processes of the destruction of the North China Craton: evidences from Peridotite, Bulletin of Mineralogy, Petrology and Geochemistry, 26, 327

Dagang Zhu, 2000, Tectonic features of the compressional‐extensional system and dynamic analysis of rock fabric in Yunmengshan area, Beijing, Acta Geoscientia Sinica, 21, 337

Thông tin
Thông tin xuất bản

Acta Geologica Sinica

Tập 83 Số 2

310-320

Thông tin tác giả