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 ...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.展开更多
文摘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.
