吉林省桦甸火龙岭钼矿床地质特征及其成因

The geologic features and genesis of the Huolongling Mo deposit,Huadian,Jilin Province

燕山期酸性岩浆侵入桦甸地区晚二叠世寿山沟组中部大理岩内,发生了接触热变质和接触交代变质作用,在矽卡岩外接触带中形成矽卡岩型钼矿床,矿体与地层产状一致。围岩蚀变复杂,矿体与围岩界线明显。其矿石矿物组合简单,由辉钼矿和少量的黄铁矿、磁铁黄矿、黄铜矿、闪锌矿、白铁矿组成。

In Yanshan time,the acid magma intruded into the middle part of marble,Shoushangou Formation,late Permian,Huadian area,that resulted in contact thermometamorphism and contact metasomatic metamorphism,and formed skarn Mo deposit in the exocontact of skarn,the orebody is in accordance with the strutigraphic occurrence.The wall-rock alteration is complex,and the boundary line between orebody and wall-rock is obvious.The assemblage of ore mineral is simple which is composed of molybdenite,a little pyrite,pyrrhotite,chalcopyrite,sphalerite and marcasite.