Rb-Sr Dating of Sphalerites from the Lengshuikeng Ag-Pb-Zn Deposit, Jiangxi, and Its Geological Significances
摘要
AN id=EnChDivSummary name="EnDivSummary">The Lengshuikeng ore field in Jiangxi Province is one of the most important Ag-Pb-Zn deposits in northern Wuyi Mountains , China.It ’ s a typical porphyry Ag-Pb-Zn deposit in the world , as well as volcanic sedimentary-hydrothermal reworked deposit are quite unique and rare , and therefore worthy of detailed research.Mineralization age from 40 Ar / 39 Ar age of sericite is consistent with the emplacement age of 162~155 Ma from the ore-bearing porphyry , indicating that the deposit formed on early stage of mineralization age.Rb-Sr dating of sphalerite yielded an isochron age of 126.9±7.1Ma , which represents the late stage of mineralization age.Formation of the large and super-large deposits in the Lengshuikeng ore field constrain is not only restricted by the tectonic regime transformation of the intracontinental setting in Eastern China , but also affected by long-term and multiple stage mineralizations.