摘要
铁炉坪矿床的矿石特征及围岩蚀变分带均反映了矿床热液成因特点。近年来,萤石Sm-Nd同位素体系已经被成功地应用于热液矿床中的成矿事件年龄。该项研究在铁炉坪矿区切穿矿脉的萤石脉中选取萤石进行Sm-Nd年龄测定,获得等时线年龄为(125±18)Ma,该数据与熊耳山矿田内有关岩体和矿床的近矿蚀变岩同位素年龄结合,不仅对铁炉坪矿床主成矿时代具有一定的限制作用,对于研究熊耳山矿田内岩浆—热液活动演化或成矿持续时间亦具有重要的参考价值。
The ore characteristics and wall rock alteration zoning indicate that the Tieluping Ag-Pb deposit is hydrothermal origin. In recent years, the Sm-Nd isotope dating of fluorite has been successfully applied to the mineralization aging of hydrothermal ore deposits. Based on Sm-Nd isotope measurement of fluorite collected from the fluorite veins that cut the ore veins, the isoehronal age is （125± 18） Ms. In combination with the isotopic ages of magmatie rock and altered rocks nearby orebody in Xiongershan ore field, this age data can be used to restrict the main metallogenic epoch of Tieluping Ag-Pb deposit, and also provide important reference values for study of tectonic-magmatic activities and the mineralization duration in Xiongershan ore field.
出处
《矿产勘查》
2016年第1期120-125,共6页
Mineral Exploration
关键词
银铅矿床
Sm—Nd测年
成矿时代
萤石
豫西
Ag-Pb deposit, Sm-Nd dating, metallogenic epoch, fluorite, western Henan
