江西省大吉山钨矿床辉钼矿铼-锇同位素定年

Re-Os isotopic dating of molybdenite from Dajishan tungsten deposit in Jiangxi Province

大吉山钨矿床位于南岭成矿带，是赣南地区著名的大型钨矿床。文章首次运用铼一锇同位素方法对大吉山钨矿床进行精确定年，给出了可靠的辉钼矿铼一锇等时线年龄（161．0±1．3）Ma。该年龄代表了大吉山石英脉型黑钨矿的成矿年龄，属于燕山早期。大吉山石英脉型黑钨矿成矿年龄的精确厘定，为本地区的成矿理论研究提供了重要数据，也进一步显示170～150Ma是华南地区中生代钨矿大规模成矿作用的重要时期。

Located in the Nanling metallogenic belt of Jiangxi Province, the Dajishan tungsten deposit is a famous large-size tungsten deposit. Precise Re-Os isotopic dating of molybdenite from the Dajishan tungsten deposit was carried out, which yielded an isochron age of （161.0 ± 1.3） Ma. This age is interpreted as the formation age of the molybdenite, representing the formation period of the Dajishan quartz-tungsten type deposit, i.e., the ore deposit was formed in Early Yanshanian period. The precise dating provides convincing basic reliable data for further study of the ore deposit, and also suggests that tungsten formation in South China. the period of 170--150 Ma was an important period for