青海哈西亚图多金属矿床地质特征及成因探讨

为了加快青海省优势环境与战略矿产勘查进程,文中对哈西亚图多金属矿床成矿地质背景、矿床地质特征、控矿因素及成因进行了综合分析,研究结果表明:哈西亚图多金属矿床已发现矿体的成因类型为矽卡岩型,矿体从垂向上看,可分为4层均产于具垂直分带的矽卡岩带中,受矽卡岩类型影响矿石类型在垂向上也具有明显分带性,在华力西期花岗闪长岩与古元古界金水口岩群的碳酸盐岩的接触带附近为主要成矿部位,通过早期区域变质作用、矽卡岩化作用及晚期的热液成矿作用3个阶段,形成了以磁铁矿体为主,铜、铅、锌、金并存的多金属矿床。

Geological characters and genesis of polymetallic deposit in Haxiyatu region of Qinghai province

The characteristics and ore genesis of Haxiyatu polymetallic deposits were analyzed from the metallogenic geological background,geological features of deposit and ore- controlling factors based on recent years＇ field survey work. The genetic types of the ore body which has been discovered in Haxiyatu polymetallic deposit is skarn. In the vertical direction,ore body can be divided into four floors and produced in a vertical zonation skarn zone. Under the influence of skarn type,the type of ore has a obvious zonation in the vertical direction. The main ore- forming parts are near the contact belt which locates between the variscan granodiorite and the paleoproterozoic jinshuikou Gr. carbonatite. Through early regional metamorphism,skarnization and late hydatogenesis,it formed a polymetallic deposit which is mainly for magnetite ore body,and has been coexisted with copper,lead,zinc and gold.