Whole-reck Rb-Sr isochron dating of Sb-bearing granites and alkaline rocks at Gejiu, Yunan Province has been conducted for their emplacement ages and initial ^87Sr/^84Sr ratios. The Sr isotopic compositions of apatite...Whole-reck Rb-Sr isochron dating of Sb-bearing granites and alkaline rocks at Gejiu, Yunan Province has been conducted for their emplacement ages and initial ^87Sr/^84Sr ratios. The Sr isotopic compositions of apatites from some basic rocks in Jiasha and granite bodies have also been studied in decal, The genesis and evolution of Gejiu Snbearing granites as well as ore-search indicators are discussed on the basis of the available data in conjunction with the geochemical data on trace elements, such as Rb and Sr, Sr isotopic characteristics of the volcanie rocks, meta-diabase and host rocks, and isotopic features of ore leads.展开更多
Isotopic geochronology has long been confined to the determination of diagenesis age. Up to now, it is an open problem for determining the minerogenetic ages of a great many metallic deposits, rather than uranium.
文摘Whole-reck Rb-Sr isochron dating of Sb-bearing granites and alkaline rocks at Gejiu, Yunan Province has been conducted for their emplacement ages and initial ^87Sr/^84Sr ratios. The Sr isotopic compositions of apatites from some basic rocks in Jiasha and granite bodies have also been studied in decal, The genesis and evolution of Gejiu Snbearing granites as well as ore-search indicators are discussed on the basis of the available data in conjunction with the geochemical data on trace elements, such as Rb and Sr, Sr isotopic characteristics of the volcanie rocks, meta-diabase and host rocks, and isotopic features of ore leads.
基金Project supported by the National Natural Science Foundation of China
文摘Isotopic geochronology has long been confined to the determination of diagenesis age. Up to now, it is an open problem for determining the minerogenetic ages of a great many metallic deposits, rather than uranium.
