• 责任者：Xiang Xinkui (No.916 Geological Team ; Jiangxi Geology and Mineral Exploration Bureau ; Jiujiang 332100 ; China) ; Wang Peng
• 刊名：Geological Bulletin of China
• 出版年：2013
• 卷期：32(11)
• 关键词：钨矿 ; tungsten ores ; 铼—锇计时 ; Re-Os dating ; 江西 ; Jiangxi Province
• 页码：p.1824-1831
• 图表：4 illus., 2 tables, 32 refs.
• 分类号：1001
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

     The Shimensi tungsten polymetallic deposit lies in the Mesozoic Cu-Mo-Au-Ag-Pb-Zn ore belt of Jiangnan block with- in Lower Yangtze metaUogenic province. The Shimensi W deposit is related with Yanshanian granites, and is the northern ore block of the largest Dahutang W deposit which was recently prospected in China. In this study, six molybdenite samples of the ore-forming stage were collected for Re-Os isotope dating determine the chronology of the ore deposit. The analytical results yield an isochron age of 149.6Maminor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">±l.2Ma minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（n=6, MSWD=I.6minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">） and weighted average model age of 150.4Maminor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">±l.4Ma minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（n=6, MSWD=I.3minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）. This age indicates that the mineralization took place during Late Jurassic. Moreover, the Re contents of molybdenite samples is 334.4minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">×10^-9minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">～22600minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">×10^-9, which indicate that the ore-forming materials are likely to come from the crust-or crust-mantle-derived ones. In combination with metallogenic geological background, we infer that the Shimensi W deposit is associated with the subduction of the Paleo-Pacific ocean plate beneath the Eurasian continent. It is proposed that the ore-forming materials were extracted by alkali metasomatism between the magma and the wall rock and then concentrated in the favourable areas.