Laser micro-area analysis of Ar-40-Ar-39 isochron age for Fanshan superlarge alunite deposit, Zhejiang Province, China

Authors
Ren, SL Zhou, XH Dai, TM Chu, ZY
Citation
Sl. Ren et al., Laser micro-area analysis of Ar-40-Ar-39 isochron age for Fanshan superlarge alunite deposit, Zhejiang Province, China, CHIN SCI B, 43(23), 1998, pp. 2005-2008
Citations number
10
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
10016538 → ACNP
Volume
43
Issue
23
Year of publication
1998
Pages
2005 - 2008
Database
ISI
SICI code
1001-6538(199812)43:23<2005:LMAOAI>2.0.ZU;2-E
Abstract
Laser micro-area analysis Ar-40-Ar-39 isochron dating for pure alunite is f irst reported. Micro-area Ar-40-Ar-39 isochron dating results revealed that the metallogenetic epoch of Fanshan superlarge alunite deposit is 74.50 Ma , and this age is 10-20 Ma later than that of regional volcanic activity. M oreover, the potential application of micro-area analysis Ar-40-Ar-39 isoch ron dating method in metallogenetic epoch studies for nonmetal deposits is also discussed.