青海都兰阿拉克湖—红水川地区地质特征与找矿前景

The Prospecting Perspective an d Geological Characteristics in Alake Lake-Hongshuichuan,Dulan County, Qinghai Province

拉克湖—红水川地区的地质—构造—物化探资料表明:该区具有寻找铜(钴)金等矿床的良好的成矿背景,是东昆仑重要的成矿带。北部东昆仑南构造带的主攻矿种是Cu、Co、Au,其次是Pb、Zn、W,矿床类型为与华力西期基性—中基性海相火山岩有关的火山喷流沉积型SEDEX、VHMS型铜金钴矿、与中酸性侵入岩有关的矽卡岩型、热液脉型贵金属及多金属矿和叠加改造型矿床;中部重视洪冲积型、现代砂矿型砂金和膏盐矿床;南部主攻矿种为Cu、Co、Au,其次是Ni、Fe、Cr矿床类型为布青山群中与华力西期基性—中基性海相火山岩有关的块状硫化物型铜钴、铜金矿,伴有基性—超基性岩侵入的镁铁—超镁铁质岩浆熔离型的镍矿和结晶分异型的铬铁矿。

The achievement data of geology,structure,geophysical and geochemical exploration in Aalake Lake- Hongshuichuan zone illustrate that this area has a good metaltogenic background to explore copper （cobalt）-gold deposit.and it is an important mineralization belt of East Kunlun zone.The chief minerals of south structural belt of northern East Kunlun is Cu,Co,Au,secondly is Pb,Zn,W.The types of deposit are volcanic exhalation-sedimentary SEDEX and VHM$ types Cu-hu-Co mine related with subsiliccous-mcdium basic volcanic rocks of Variscan e- poch,skarn type,hydrothermal vein type precious metals and polymetallic ore and superposed-reworking type de- posits related with medium acidity invade rock.The central part should pay attention to the deluvial and alluvial type of modern placer type alluvial gold and the gypsum-salt deposit.The chief minerals of south part is a Cu,Co, Au,secondly is a Ni,Fe,Cr,the types of ore deposits are massive sulfide type copper-cobalt,and copper-gold ores hosted in Buqinshan Group related with marine facies subsiliceous-medium basic volcanic rocks of Variscan e- poch,accompanied with nickel minerals of mafic-ulttramafic magma liquation type with basic-uhrabasic rocks intrusion and crystallized differentiation type chrome iron ore.