The Geological―geochemical Characteristics And Prediction Of Deep In Baortu Copper Deposit,xinjiang

Xinjiang Baortu copper ore deposit is located in the north-border of Tarim plate and the south of Wuwmen-Baortu abruption,which have poor investigation.The author research on the geological-geochemical characteristics of Bartu copper ore deposit with methods of field exploration,macroelement analysisand trace element analysis and on the deep mineral perspection with Gray Model. The main fruit is as follows.Ore deposit geological characteristics:This deposit occrence in phyllite, biotite schist, gneiss, migmatite et.al a suit of metamorphics,which is made of three ore body. The most of it assume vein and is 100m～670m long, whose main metal mineral are chalcophylic, pyrit, dipyrit and main no-metal mineral are feldspar, quartz, sericite and so on. The grade of ore are 0.23%～6.08%.The stage of mineralization is divided into stage of quartz reef, stage of sulfide―quartz and stage of quartz-sulfide.Geochmical characteristics: The∑REE value of ore deposit is relative invariable(∑REE=2.1ppm～139.6ppm) and The LREE/HREE=0.06～0.97,which assume LREE and HREE is differentiate but HREE is relative enrichment. The partition curve belong to left-leaning type and the partition patterns of the ore deposit are similar with the vein of migmatite, which assum the the minearal source are likely to it.Via tectonic discriminant analysis,The most unique point of vein of migmatite fall on the envirnoment of volcanic arc,which is relate to the collision of plates.Therefore, the author conclude ore genesis type is metamorphogenic-hydrothermal copper deposit,which is controlled by fault..Deep perception:Via establishing Gray Model of grade of ore, The author forcast No.18―4 body that the more deep, the grade of ore more better.This fruit of prevision provide deep explorition basis for this deposit in theory.