中文摘要：

通过对修水县莲花芯石英脉型Cu-Mo-W矿床的辉钼矿进行Re-Os同位素测年,获得的w（普Os）为0.0083×10^-9～0.1535×10^-9,加权的平均年龄为（157.7±2.8）Ma,计算得到辉钼矿Re-Os等时线年龄为（158.6±2.0）Ma（MSWD=0.63）,与加权平均年龄在误差范围内一致,可代表辉钼矿的形成年龄,成矿作用时代晚于赋矿围岩晋宁期黑云母花岗岩的成岩时代。对比区域成岩成矿作用时代,认为该矿床可能与燕山期花岗岩岩浆活动有关,是赣北大规模钨多金属成矿序列演化的产物之一,属于华南中生代第二次大规模成矿作用（165～135 Ma）的产物。

英文摘要：

The Lianhuaxin Cu-Mo-W deposit is a postmagmatic hydrothermal Cu-Mo-W deposit in nonthwest Jiangxi Province. Re-Os isotopic dating of 5 molybdenite samples from the mineralized quartz veins of the Lianhuaxin deposit yielded a precise isochron age of （158.6±2.0） Ma and a Tukey＇ s Biweight average model age of （157.7 ±2.8） Ma. The Os content of molybdnite is （0.0083-0.1535） ×10^-9, and the MSWD is 0.63. The Lianhuaxin molybdenum deposit formed in the mid-late Middle J urassic period, and the ore-forming age corresponds to the second mineralization stage （ 165 - 135 Ma） in the Late Jurassic of South China, consistent with the tungsten-tin mineralization around 160 Ma within the region. The molybdenum mineralization of the Lianhuaxin Cu- Mo-W deposit in north Jiangxi Province occurred in 165-135 Ma,.