| Golmud in Qinghai province,red SanChaKou jade ore deposits located in southern margin of the qaidam fold belt,the snow mountain-Boolean buda hill khan variscan,indosinian period cobalt,gold,copper,jade,rare,rare earth metallogenic belt orogenic belt,is the largest discovered so far east kunlun area nephrite deposits.Orebodies occur in late proterozoic wan bao groovegroup of carbonate group marble,dolomitic marble rock formations.Jade ore bodies show lens shape,like a layered distributed in regional tectonic form secondary fault,small fold collapse space,bedding,schistosity structure.Diorite Bin dike,diabasic Bin dyke intrusion into dolomitic marble strata contact metasomatic ore forming a series of unique combination of mineralization.-basic intrusive rocks in the formation of ore deposits.Therefore,the study of the ore deposit in combination with regional metallogenic geological background analysis can fully reveal the region east kunlun area nephrite ore metallogenic characteristics,in the perfect-basic magma hydrothermal contact metasomatic category tremolite nephrite deposits metallogenic theory;Metallogenic model is set up and the ore-prospecting criteria,to promote regional same type nephrite deposits metallogenic research,practical prospecting and evaluation has important practical significance,the paper through their red table SanChaKou jade ore deposit geological characteristics and metallogenic regularities and the regional metallogenic geological conditions,mineralization background analysis,the main draw the following understanding:1,Red table SanChaKou jade ore ore-forming geological characteristics,metallogenic regularity.(1)The regional tectonic secondary fault,small fold collapse space,bedding,schistosity structure small space and magmatic intrusive contact with favorable space for jade ore body,ore,ore body basic by the structure and the basic control of small vein.Lenticular ore body in space is small,like a layered spatial continuity.(2)Ca,Mg in the ore Fe2 + from the surrounding rock of carbonate ore bodies(dolomite and dolomitic marble,etc.),Si,Mn,Na,Al,K,P,Fe3+ substances such as sources of basic rock mass.n the process of jade ore forming a series of unique combination of mineralization,common mineralization types are through flash petrochemical,petrochemical,diopside in petrochemical,epidotization,actinolite,carbonate lithification,silicide,etc.(3)Mineralization type is given priority to with contact metasomatic type,with soda hot filling type.Mineralization phases for the characteristics of period of time.2,East kunlun area nephrite ore metallogenic regularities and Prospecting model discussed in this paper(1)East kunlun area nephrite deposits are mainly distributed in the south fracture formed by tectonic system,jinshui group,building wan bao groove group of carbonate formation of ore-bearing bed,the former is rich in magnesia strata.The area of soft jade ore is not correlated with the acidic rock formation,ultrabasic rock mass of serpentine form some more.-basic rock is dominant nephrite ore formation.(2)The preliminary thought was in several kilometers east kunlun jade ore semi-closed form source ment,also under formation temperature above 600,thousands of mpa pressure.The area of soft jade ore formation began in the late Paleozoic tectonic events,about 340 Ma.(3)Mineralization types in addition to contact metasomatic type,soda,hydrothermal filling type,the dynamic metamorphism reformation type are likely to exist area. |
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