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Journal of Zhejiang University SCIENCE A

ISSN 1673-565X(Print), 1862-1775(Online), Monthly

2006 Vol.7 Suppl.Ⅱ P.320-324

40Ar-39Ar dating of basalts from Tarim Basin, NW China and its implication to a Permian thermal tectonic event

Yang Shu-Feng, Li Zi-Long, Chen Han-Lin, Chen Wen, Yu Xing

Department of Earth Science, School of Science, Zhejiang University, Hangzhou 310027, China; Key Isotopic Laboratory, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

zilongli@zju.edu.cn

Abstract: This paper reports 40Ar-39Ar ages of northwestern China’s Tarim Basin Permian basalts. 40Ar-39Ar age dating for basaltic samples from the Yingan section, Keping area and Damusi section of the southwestern part of Tarim Basin yields plateau ages of (281.8±4.2) Ma and a weighted mean value of (290.1±3.5) Ma respectively. This study combined with previous data indicates that the basaltic rocks from the studied area formed during 282~290 Ma. 40Ar-39Ar age dating from the basalts addresses a tectonothermal event in the Tarim Basin that occurred during the Early Permian of 278~290 Ma.

Key words: 40Ar-39Ar age dating, Basalt, Tectonic setting, Tarim Basin


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DOI:

10.1631/jzus.2006.AS0320

CLC number:

P58; P59

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Received:

2006-03-13

Revision Accepted:

2006-05-30

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