Origin of Cherts during the Ediacaran-cambrian Transition in Hunan and Guizhou Provinces, China: Evidences from REE and Ge/si

WEI Shuaichao1,2, CHEN Qifei3, FU Yong1,4,†, CUI Tao5, LIANG Houpeng1, GE Zhihua1, ZHANG Peng1, ZHANG Yong6

ACTA Scientiarum Naturalium Universitatis Pekinensis - - Contents -

1. School of Resources and Environments, Guizhou University, Guiyang 550025; 2. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061; 3. Guizhou Geological Survey, Guiyang 550018; 4. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037; 5. College of Resources and Environmental Engineering, Guizhou Institute of Technology, Guiyang 550003; 6. Jiangsu Electric Power Design Institute, Nanjing 211102; † Corresponding author, E-mail: byez1225@126.com

Abstract Two types of Liuchapo Formation cherts, bedded cherts and mounded cherts, were deposited in Bahuang section of Tongren in Guizhou Province and Ganziping section of Zhangjiajie in Hunan Province. The origin of the cherts was discussed by analyzing the characteristics of major, trace elements and REE compositions and Ge/si ratios. It was revealed that the content of SIO2 in bedded cherts was range from 96.06% to 99.61%, and the content of SIO2 in mounded cherts was range from 98.62% to 99.56%, averaging 99.13%, and the contents of other chemical components were very low. Thus, two types of cherts are pure cherts. Moreover, the ∑REE of the bedded cherts in Bahuang section is ranged from 20.14 to 248.56 μg/g (averaging 100.62 μg/g), and no obvious

Newspapers in Chinese (Simplified)

Newspapers from China

© PressReader. All rights reserved.