Microregion Analyse Of The Ore Minerals Of Kalatongke Nickel-copper Deposit, Xinjiang

Kalatongke Ni-Cu sulfide deposit, in the northern margin of the Junggar terrane, northern Xinjiang, NW China, lies in east of Saerbulake-Sasekebasitao synclinorium in Junggar fold system, which is the boundary of Altai Caledonian fold system and Junggar Hercynian fold system. This area develops a series of second-order folds and subsidiary fractures, and composes of eleven rock bodies(Y1-Y9, Y10,Y11) and G21,G22 gravity abnormal district and AM16 aeromagnetic anomaly district, where a large Cu-Ni ore deposit, two moderate ore deposits and four small ore deposits have been explored. The Kalatongke Ni-Cu sulfide deposit is the largest and most representative deposit in the whole of the Xinjiang Province.The paper attempts to study on the characteristic the structures, constructures, micrograpy of ores, and discuss the distribution of their trace elements; especially, probed into the ore genesiss by the PGE.Some conclusions can be drawn as following:(1) This paper's stduy enriches the reseaching data of the ore mineral of Kalatongke Ni-Cu sulfide deposit.(2) The trace element of the ore mineral indicated that Kalatongke Ni-Cu sulfide deposit is Magmatic segregation Ni-Cu sulfide deposit. Hydrothermal process was weak and occurred locally, and the deposit is more enrichment in copper than nickel.(3) The ores are comprised of disseminated sulfide ores and massive sulfide ores, for the former they should form in the same or the similar physical and chemical condition, but the latter has more complicated forming process,and both two experienced a few of sulfide pre-segregation, leading to the deposit depleted in platinum group elements. In the massive sulfide ores, especially the Cu-Ni-rich ore and the high-Cu and Ni-rich ore are both belong to the production of the mine plasm injected;but the latter was charactered by the hydrothermal alteration locally, and behaved the high content of the REE.(4) The mass balance calculation shows that the mass fraction of the Pt\Pd in the base metal sulfide minerals (BMS) of the kalatongke deposit are both very low,and there is almost no Pt or Pd in the chalcophile. The correlative coefficient between the Fe and Pt\Pd are R2=-0.24 and R2=0.45, which is weak negnative or positive interrelation, indicates that sulfide minerals maybe not the main carrier of the Pt and Pd, but the two elements mainly exists in the platinum-group element minerals.