西北地区矿产资源成矿远景与找矿部署研究主要进展及成果

西北地区地处亚欧大陆腹地,以元古宙—古生代金属成矿为显著特色。火山喷溢型铁矿、BIF型铁矿、岩浆熔离型铜镍矿、块状硫化物型铜多金属矿、海底喷流型铅锌矿及浅成低温热液型金矿是主要的成矿类型。中亚构造域中南部以晚古生代内生矿床产出为特点,主要表现为石炭纪—早二叠世大火成岩省大规模的成矿作用。塔里木、鄂尔多斯是中国重要的油气储藏盆地,周边有金属矿产产出。特提斯构造域东北部主要是秦—祁—昆造山带西昆仑塔什库尔干、祁漫塔格重要矿集区的发现。根据西北地区重要成矿区带的主要成矿特征、典型矿床及找矿新发现,结合多元信息综合分析,对各个成矿区带进行资源潜力评价、划分找矿远景和勘查选区,并提出了部署建议。

Major Progress and Achievements in Study of the Metallogenic Prospect and Prospecting Deployment of Mineral Resources in Northwest China

The most important metallogenic epochs are Proterozoic period and Paleozoic period in Northwest China which lies in the hinterland of Eurasia, and the main metallogenic types are extrusive volcanic iron deposits, banded iron formation (BIF) iron deposits, magmatic copper-nickel sulphide deposits, volcanic hosted massive sulphide copper polymetallic deposits, sedimentary exhalative lead-zinc deposits and epithermal gold deposits. The ore genesis closely relates to the large igneous provinces of Carboniferous-Early Permian in central south of Central Asian Tectonic Region, and the relevant metallogenic feature is characterized by Late Paleozoic endogenic mineralization. Both of the Tarim and Ordos basins are important oil storage basins, with some metal deposits located in their surrounding areas. Taxkorgan ore concentrating area of west Kunlun and Qimantage ore concentrating area of east Kunlun have been found in Qinling-Qilian-Kunlun orogenic belt of northeast of Tethyan tectonic domain. According to the multivariate comprehensive analysis of mineralization characteristics, typical deposits and new prospecting discoveries, we evaluated the mineral resources potential and prospecting potential, pointed out the mineral prospects and exploration areas, and put forward proposals for further work of Northwest China.