青海省格尔木市黑山地区矽卡岩型矿床地质特征及成矿远景分析

Geological characteristics and metallogenic prospective analysisof skarn deposit in Heishan area, Golmud City, Qinghai

青海省格尔木市黑山地区位于祁漫塔格—都兰成矿带上,周边矿产资源丰富,其北部的尕林格铁矿和野马泉铁矿,其南部的肯德可克钴多金属矿等均达到中大型矿床规模。通过分析黑山地区1∶2.5万水系沉积物测量的综合异常特征,划分出两条含矿矽卡岩带,并在Ⅰ号含矿矽卡岩带中圈定了以铁、铜、钴为主的数条矿体。该区矿化主要赋存在岩体与滩涧山群的接触带中,含矿围岩主要为透闪透辉矽卡岩,成矿类型主要为矽卡岩型铁、铜、钴等多金属矿。结合区域资料,认为该地区矿化线索可与尕林格铁矿、野马泉铁矿等已知矿产类比,因此具有寻找中大型矽卡岩型矿床的潜力。

The Heishan area of Golmud City,Qinghai Province is located on the Qimantag-Dulan metallogenic belt.There are abound mineral resources in the surrounding area,including Galinger iron deposit and Yemaquan iron deposit in the north,and Kendrick cobalt polymetallic deposit in the south.They all reach the scale of medium and large deposits.This paper analyzes the comprehensive anomaly characteristics of the 1∶25,000 stream sedimentary survey in the Heishan area.Two ore-bearing skarn zones are divided,and several ore bodies of main Fe,Cu,Co are delineated in the ore-bearing skarn zone No.I.The mineralization in this area is mainly hosted in the contact zone between the rock mass and Tanjianshan Group.The ore-bearing surrounding rock is mainly tremolite and diopside skarn,and the metallogenic type is mainly Fe,Cu,Co and other element polymetallic deposit of skarn type.Combined with regional data,it is considered that the mineralization clues in this area can be compared with the known mineral resources such as Galinge iron deposit and Yemaquan iron deposit.There is the potential to find the medium and large skarn deposit in the area.