2024年第2期 中国非金属矿工业导刊 总第164期【矿产资源】东昆仑查可勒图地区石墨矿地质特征及找矿标志马风云1,2,马 祥1,2,冶文军1,2,马玉林1,2,马玉忠1,2,马晓萍1,2,赵洪岳1,2(1.青海省第四地质勘查院,青海 西宁 810008;2.青海省页岩气资源重点实验室,青海 西宁 810008)【摘 要】为研究查可勒图石墨矿地质特征及找矿标志,研究区内开展了地质测量、槽探工程、钻探工程以及自然电场法测量等工作。
结果表明查可勒图地区晶质石墨矿赋存于古元古代金水口岩群含碳质变质岩系地层中,含矿岩性为含碳质大理岩及石英片岩,经历多期区域变质作用和后期构造岩浆侵入作用,最终形成石墨矿。
全区圈定3条石墨矿带,24条石墨矿(化)体,矿石矿物为晶质石墨,石墨中固定碳CGD 含量为6.34%,分大理岩型和片岩型两种类型。
文章对查可勒图石墨矿床的地质特征进行了阐述,以期为本区石墨矿资源勘查提供参考。
【关键词】石墨矿床;地质特征;找矿标志;查可勒图【中图分类号】619.252 【文献标识码】A 【文章编号】1007-9386(2024)02-0040-05Geological Characteristics and Prospecting Criteria of Graphite Deposits inChakletu Area, East KunlunMA Feng-yun 1,2, MA Xiang 1,2, YE Wen-jun 1,2, MA Yu-lin 1,2, MA Yu-zhong 1,2, MA Xiao-ping 1,2, ZHAO Hong-yue 1,2(1.Fourth Geological Survey Institute of Qinghai Province, Xining 810008, China; 2. Qinghai Key Laboratory of Shale GasResources, Xining 810008, China)Abstract: In order to study the geological characteristics and ore searching signs of the graphite mine in Chakoletu, geological surveys, trenching works, drilling works and natural electric field method surveys have been carried out in the study area.The results show that the crystalline graphite ore in the Chakoletu area is embedded in the carbonaceous metamorphic rocks of the Jingshukou Group of the Paleoproterozoic era, and the ore-bearing rocks are carbonaceous marble and quartz schist, which were formed by regional metamorphism in several phases and the intrusion of tectonics magma in the later stage, and finally formed the graphite ore. There are 3 graphite ore zones and 24 graphite ore bodies in the whole area, and the ore minerals are crystalline graphite, the fixed carbon C GD content in graphite is 6.34%, and it is divided into two types: marble type and schist type. The article describes the geological characteristics of the graphite deposits in Chakoletu, with a view to providing a basis for the prospect of graphite ore resource exploration in the region.Key words: graphite deposits; geological features; prospecting signs; Chakeletu东昆仑查可勒图地区地处柴达木盆地西南缘,根据青海省矿产资源潜力评价青海省大地构造单元划分方案,区域上处于秦祁昆造山系(Ⅰ级)—东昆仑弧盆系(Ⅱ级),三级构造单元属北昆仑岩浆弧(Pt 3-Pz 1)(Ⅲ级),该区属东昆仑成矿带东段的伯喀里克—香日德印支期金、铅、锌(铜、稀有、稀土)成矿带的西端[1],矿产种类主要以铁、铜为主,伴生金、银、铅、锌、钼、石墨。