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

作　　者：REN Shengli ZHOU Xinhua DAI Tongmo CHU Zhuying 

机构地区：[1]Institute of Geology,Chinese Academy of Sciences,Beijing 100029,China [2]Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China.

出　　处：《Chinese Science Bulletin》1998年第23期2005-2008,共4页

基　　金：ThisworkwassupportedbyNationalClimbingPlanProject (A30 2 0 ) .

摘　　要：Laser micro area analysis 40 Ar 39 Ar isochron dating for pure alunite is first reported. Micro area 40 Ar 39 Ar 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. Moreover, the potential application of micro area analysis 40 Ar 39 Ar isochron dating method in metallogenetic epoch studies for nonmetal deposits is also discussed.Laser micro area analysis 40 Ar 39 Ar isochron dating for pure alunite is first reported. Micro area 40 Ar 39 Ar 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. Moreover, the potential application of micro area analysis 40 Ar 39 Ar isochron dating method in metallogenetic epoch studies for nonmetal deposits is also discussed.

关 键 词：superlarge alunite deposit laser microarea analysis^(40)Ar-^(39)Ar isochron Fanshan Zhejiang Province. 

分 类 号：P578.75[天文地球—矿物学]