The Study On Metallization Of Skarn Cu-fe Polymetallic Deposit In Lailisgaoer Ore Cluster Area, Western Tianshan, Xinjiang

The Lailisigaoer Mining district located in the middle of Boluokenu metallogenic belt of the Western Tianshan in Xinjiang,and which is an important source of copper, iron, molybdenum, lead, zinc, gold and other metals in the West Tianshan(Xinjiang, northwestern China).Based on the results of previous work,this paper focuses on the relationship between the geological features of the deposit and the nature of the deposit of Halegati-muzuke deposit,Aimusidaiyi-kekesala deposit and Seleteguole deposit.Then getting the following new understanding about the Lailisigaoer Mining district:1. Three typical ore deposits in the Lailisigaoer Mining district are the skarn deposit which are subject to the magmatite, lithology and contact zone structure "three-in-one" joint control. The difference is that Seleteguole deposit experienced multi-stage mineralization, and the part of the orebody occur in the bedding interlayer of the exocontact skarn zone.2.In the Lailisigaoer Mining district,the diagenetic age and metallogenic age of the Halegati-muzuke deposit,the Aimusidaiyi –kekesala deposit and the Seleteguole deposit are relatively close,which is distributed in the Middle Devonian to the Late Carboniferous.3. These rocks of the Halegati-muzuke deposit,the Aimusidaiyi –kekesala deposit and the Seleteguole deposit showed high potassium and peraluminous characteristics, by the contents and characteristics of the main parameters.And geochemical diagram indicates that rocks of the Halegati-muzuke deposit,the Aimusidaiyi –kekesala deposit and the Seleteguole deposit are belong to the I type granite and the volcanic arc granite. The trace element features reflect that Cr and Ni in the three mining areas are much lower than that in the ordinary primitive magma, indicating that they may be derived from the enriched mantle source region. In addition, The trace elements of the rocks of the three mining areas are characterized by relative enrichment of large ion lithophile elements(Rb,K) and depletion of high field strength elements(P,Nb,Ta,Ti), which shows these magmas from the subduction zone.4. S, Pb isotope analysis from the three typic deposit reveals ore materials from upper mantle magmas mix with lower crustal.5. The Halegati-muzuke deposit,the Aimusidaiyi –kekesala deposit and the Seleteguole deposit are producted by the same magmatic-structural mineralization system.