吉林小西南岔金铜矿床主要金属矿物的成因矿物学特征

The main metallic mineral's origin mineralogy features of Xiaoxinancha gold-copper deposit of Jilin Province

本文通过对矿床中主要金属矿物黄铁矿、磁黄铁矿、黄铜矿的成因矿物学研究,指出黄铁矿中Co/Ni、S/Se、Se/Te、Au/Ag比值均显示出岩浆热液成因特征;黄铁矿、磁黄铁矿、黄铜矿的硫同位素组成具深源岩浆源流特征,并随成矿深度发生有规律的变化;黄铁矿、磁黄铁矿、黄铜矿中某些微量元素质量分数北山矿段与南山矿段之间有一定差别,显示出矿床的分带性;矿床形成温度为中低温。

After the origin mineralogy study of the main metallic mineral such as pyrite,pyrrhotine,chalcopyrite in the deposit,we know that the ratios of Co/Ni,S/Se,Se/Te,Au/Ag in pyrite show magma hydrothermal origin features;the sulfur isotope constitutes of pyrite,pyrrhotine,chalcopyrite have deep-focus magma headstream feature,and happening disciplinary change as mine depth change;the microelement contents in pyrite,pyrrhotine,chalcopyrite have some different between north mountain ore block and south mountain ore block,it shows the zoning structure of the deposit;the temperature is middle—low temperature when the deposit emerged.