Late Paleoproterozoic breakup events of North China: Evidence from LA-ICP-MS zircon U-Pb ages of basaltic andesite from the Daqingshan area in Inner Mongolia

GUO Jun; MA Fucai; YANG Wen; CHENG Jun; CHENG Linqiang; GUO Xuefeng

2017 Vol. 36, No. 2-3

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GUO Jun, MA Fucai, YANG Wen, CHENG Jun, CHENG Linqiang, GUO Xuefeng. Late Paleoproterozoic breakup events of North China: Evidence from LA-ICP-MS zircon U-Pb ages of basaltic andesite from the Daqingshan area in Inner Mongolia[J]. Geological Bulletin of China, 2017, 36(2-3): 314-320.

Citation:

GUO Jun, MA Fucai, YANG Wen, CHENG Jun, CHENG Linqiang, GUO Xuefeng. Late Paleoproterozoic breakup events of North China: Evidence from LA-ICP-MS zircon U-Pb ages of basaltic andesite from the Daqingshan area in Inner Mongolia[J]. Geological Bulletin of China, 2017, 36(2-3): 314-320.

Late Paleoproterozoic breakup events of North China: Evidence from LA-ICP-MS zircon U-Pb ages of basaltic andesite from the Daqingshan area in Inner Mongolia

1.
Academy of Regional Geological Survey and Mineral Resources Exploration of Shaanxi, xianyang 712000, Shaanxi, China
2.
School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China

Received Date: 19 November 2015

Revised Date: 10 December 2015

Publish Date: 25 March 2017

Abstract

Abstract

During the 1∶50000 regional geological survey in Daqingshan area of Inner Mongolia, the authors used LA-ICP-MS zircon U-Th-Pb isotopic dating method and obtained weighted average zircon U-Pb age of 1863±10Ma from the Jurassic volcanic rock. The contact relation is considered to be unconformably covered by Upper Permian Naobaogou Formation, as shown by field survey. According to the major, trace and rare earth elements analytical results of the rock, the basaltic andesite was formed in an intracontinental rift. This was a breakup event between multi -stage rifting in the Late Paleoproterozoic to Neoproterozoic in North China. It is of great significance for studying multi-stage rifting and provides an important basis for the North China Craton (NCC) evolution as a stable platform or para-platform.
- LA-ICP-MS zircon U-Pb age /
- multi-stage rifting /
- NCC /
- Daqingshan area /
- Inner Mongolia

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