摘要
We have measured Rb and Sr concentrations in fluid inclusions of quartz in gold deposits, southwestern Hunan. The Rb\|Sr isochron ages of 435±9Ma and 412±33Ma are respectively determined, revealing that gold mineralization in this area took place in the Caledonian period rather than in the Wuling\|Xuefeng period as traditionally considered. Sr isotope geochemistry of the hydrothermal fluid indicates that the ore\|forming materials are of crust origin, derived largely from the ore\|hosting strata rather than from the basic dikes.
We have measured Rb and Sr concentrations in fluid inclusions of quartz in gold deposits, southwestern Hunan. The Rb\|Sr isochron ages of 435±9Ma and 412±33Ma are respectively determined, revealing that gold mineralization in this area took place in the Caledonian period rather than in the Wuling\|Xuefeng period as traditionally considered. Sr isotope geochemistry of the hydrothermal fluid indicates that the ore\|forming materials are of crust origin, derived largely from the ore\|hosting strata rather than from the basic dikes.
基金
ThisresearchprojectwasfinantiallysupportedbythefundsoftheOpenLab .ofOreDepositGeochemistry ,ChineseAcademyofSciences (GrantNo .9
