Research On Metallogenic Searies Of Copper Deposits In East Tianshan Mountains

1, Regional ore-forming geological settingThe east Tianshan strides across three large plates. The Siberian plate crosses in the northern edge of the studied area, where as the Kazakhstan-Zhungaer plate and Tarim plate connect with each other in the south of the area through the Kangguertage-Huangshan fault. On the basis of the an integrated study on strata, magmatic-volcanic activities, geochemistry as well as geophysics and remote sensing imagines, three subtectonic units were divided.2 , Metallogenic series of copper depositsWith the elapse of time, the tectonic-magmatic evolution went on from south to north ,which resulted in regular production and spatial distribution of ore resources, correspondingly forming east Tianshan copper, gold, nickel, iron, silver clucters of mineral deposits.In the light of the concept of metallogenic series by Cheng Yuqi,Chen Yuchuan et al., the copper, iron , nickel and silver deposits might be assigned to four metallogenic series:I .The metallogenic subseries of copper, molybdenum, gold, silver deposit related to late Devonian-early Carboniferous basic-intermediate-acid hypabyssal intrusive-eruptive rocks;II. The metallogenic subseriesof iron, copper, zinc deposits related to early Carboniferous basic-intermediate-acid volcanic-intrusive rocks;III.The metallogenic subseries of copper, silver , iron deposits related to Middle -late Carboniferous basic-intermediate-acid volcanic-intrusive rocks;IV. The metallogenic subseries of copper, nickel and platinum group deposits related to Late Carboniferous-Early Permian basic-ultrabasic rocks;3, Division of regional major metallogenic beltsOn the basis of the previous work conducted and by following the principles, grounds and methods of the division of metallogenic belts, areas and fields,.In light of this , metallogenic belts of grade IV were Divided . Such a division may better reflect the minerals distribution and formation laws, more accurately guide prospecting .4, Research on model copper depositsThe copper deposits related to intermediate-acidic volcanic-intrusive complexes are widespread in eastern Tianshan. They can be divided into these types: (1) porphyry type; (2) skarn type;(3)volcanic type;(4)copper-nickel sulphide type .