Zircon SHRIMP U-Pb age of the Chuanlinggou Formation of the Changcheng Group, North China and the stratigraphic implications

doi:10.13745/j.esf.sf.2018.12.6

Earth Science Frontiers ›› 2019, Vol. 26 ›› Issue (3): 183-189.DOI: 10.13745/j.esf.sf.2018.12.6

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Zircon SHRIMP U-Pb age of the Chuanlinggou Formation of the Changcheng Group, North China and the stratigraphic implications

LIU Dianbo,WANG Xiaolin,ZHANG Heng,SHI Chenglong

1. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China

2. School of Resources Environment and Jewelry, Jiangxi College of Applied Technology, Ganzhou 341000, China

3. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

Received:2018-08-20 Revised:2018-11-30 Online:2019-05-25 Published:2019-05-25
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Abstract

Abstract: The Yanliao area in the North China Craton (NCC) represents a standard section of Meso-Neoproterozoic sedimentary strata of NCC. The Jixian and Qingbaikou Groups have gained a substantial amount of important high accuracy dating data. However, reliable high accuracy dating data are still lacking for the Changcheng Group, except for the Dahongyu Formation at the top of the group. Here, in order to accurately determine the geological age of the Mesoproterozoic Chuanlinggou Formation of the Changcheng Group, we collected samples of volcanic tuff rocks from the upper part of the Chuanlinggou Formation in the Shenxianling Section, Kuancheng County, Hebei Province and performed zircon SHRIMP U-Pb dating at the Beijing SHRIMP Center. The zircon dating yielded a weighted mean 207Pb/206Pb age of 1634.8±6.9 Ma (95% confidence, MSWD=1.2, n=23), which, we conclude, is the age of the upper part of the Chuanlinggou Formation. It is suggested, therefore, that the Changcheng Group, from the Chuanlinggou Formation to Dahongyu Formation as a whole, belongs to Mesoproterozoic strata.

Key words: zircon SHRIMP U-Pb dating, Mesoproterozoic, Chuanlinggou Formation, North China Craton

CLC Number:

LIU Dianbo,WANG Xiaolin,ZHANG Heng,SHI Chenglong. Zircon SHRIMP U-Pb age of the Chuanlinggou Formation of the Changcheng Group, North China and the stratigraphic implications[J]. Earth Science Frontiers, 2019, 26(3): 183-189.

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Zircon SHRIMP U-Pb age of the Chuanlinggou Formation of the Changcheng Group, North China and the stratigraphic implications

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