Studying On The Model Of Rock-forming And Ore-forming And The Geological Characteristic For Kalasu Cu-deposit In Xinjang

Kalasu copper deposit is situated on the southern margin of the Altay Mountain copper metallogenetic belt,and has the large-scale mineralization potential porphyry Cu-Au bed. The ore deposit is located the Siberia tectonic plate and the Kazakhstan -Zungar tectonic plate joint spot, its north is the Siberia tectonic plate; its south is Kazakhstan—Zungar tectonic plate. In the region minerals distribution with locates the structural environment relations to be close. Be bonder with the big fault of Mayinerbe that direction was north of west, the part of the north east is located in the Halon-Qinghe mineralization belt that has many rare metal, white mica and gem; the part of the south west is located in the Kalatonke-Bergen Cu-Ni-Au-Fe mineralization belt; only the part of the south of west corner is located in the Solkuduk Cu-Mo-Au mineralization belt. The latter can divide two parts, one is located in Kalaxangeer-bergen Cu-Au mineralization belt, and the other is located in Xibedu-kalatonke Cu-Ni mineralization belt. The Kalasu Cu-deposit was located in the former. It is a big discover of the prospect recently years in the southern margin of the Altay Mountain. The bed is exploring.The southern margin of the Altay Mountain is a very important magma-structure metallogenic belt, in this mineralization belt had discovered has: The Sarsuker gold ore, Qaoxihala copper (iron) gold ore, Kalatonke copper nickel ore, the Kalaxangeer copper mine, Marelate gold ore, Kekesi gold ore, Serkuduk copper (molybdenum) ore deposits and so on. It is a copper, nickel, gold mineralization centralized areas. Its geologic position is extremely unique, the geologic structure is complex, the magma activity is frequent, the mineral resource is rich, is an important copper, precious metal mineralization belts.The deposit was located Kalatonke Paleozoic arc-shaped archipelago belt, the appearing stratum for the Middle Devonian Baitashan class, was a set by the basic -medium basic volcanic rock, the pyroclastic rocks and the volcano clastic sedimentary rocks. The mainly porphyries are the quartz-porphyry and the granite-porphyry and it lies on the north of west and is consistent with this area earth lineation direction. The ore body produced in the granite-porphyry body and the adjacent formation and wall rocks is basalt and andesite. Obviously, the ore bodies are control by formation of the porphyry body and the structure.There are two issues mineralizes: the earlier mineralization fluid comes from porphyry and the later partly comes from wall rocks. The content of copper status poor and part of them include with mineral Au, Mo. The mining area is located Laoshankou gravity gradient and the gravity abnormity of west is (25～30)×10^-5m/s². Middle the stave unusual belt gradient value in (4～6)×10^-5m/s²/Km, is the strong gradient unusual category. The mineralization point appearing and the distribution force with Yulekinkalasu-Garmat high magnetism abnormal belt the high magnetism unusual axle wire basic consistent. In each kind of physical prospecting surveying work, the ore body's physical abnormal characteristic is one high and two low in prospecting. The mining area is in Au, Ag, As, Sb, Hg, Cu, Zn, Ni, Co, Cr, V and Ti geochemical element high background areas and the ore body with each kind of scale Au, Ag, Cu, Mo geochemical abnormal corresponds well. There are many faults in mining area. The faults that lie direction is north of west are most important of groups and control the copper mineralize. In the mining area the main rock is granodiorite porphyry and the distortion is obvious, the appearing area is smaller than much 0.1 square kilometer and the major axis direction is consistent with the region lineation. The mining area rock hydrothermal alteration function is intense and there are the potash feldspar, the black micatization, the epidotization, the chloritization, the calcilization, the silk micatization, the silicification. Altered mineral total quantity generally is above 50%. The main metallic minerals are chalcopyrite and pyrite, including few bornite and molybdenite; the primary metal oxidation mineral by the magnetite primarily; In the copper ore, the metallic minerals are quite simple, main metal curing mineral by, pyrite primarily, the partner sees the titanomagnetite, the white titanium ore. Secondary oxidations mineral take green copper ore primarily. The ore natural types are chalcopyrite and pyrite ore.Studying on the model of rock-forming and ore-forming and the geological characteristic for Kalasu porphyry Cu deposit is of great significance to drive a new round of prediction in the kalaxanger porphyry belt. Based on summarizing results from other people and analyzed by geological synthetic method, the paper gives a detail research on the metallogenetic geotectonic background the geological, geophysical and geochemical characteristics of the deposit, and also the genesis of the deposit, mechanism of rock-forming and ore-forming in the Kalasu Cu-Au deposit. Based on these, the paper has researched the location prediction for concealed ore-bodies of the Kalasu porphyry Cu deposit, concluded the regularities of enrichment and pointed out geological synthetic exploring model.Through to the mining area geological data research, in the scene system geological investigation and the room analysis research work, this research obtains the following main geological understanding and the innovation achievement:1. Through the Kalasu copper deposit geological feature analysis, pointed out the ore deposit the formation and the porphyry body has the inseparable relations. The ore industry type is the porphyry copper mine and belongs to the low temperature hydrothermal deposit. The ore body is obviously control by the rock mass and the structure. The granite-porphyry, the andesite and the basalt are the ore body main ledge rock and the wall rock.2. The porphyry body's direction is the north of west and the appearing area is smaller than much 0.1 square kilometer. The mineralization porphyry only invades the Middle Devonian Baitashan class.3. The porphyry is the part of dive ocean melt shell and invaded the earth face's product, the structure background which the porphyry forms pulls for is the arc-shaped archipelago early time evolutionary process in part opens the stage and the porphyry formed temperature is 420-560°C.4. Mineralization includes two times named Haixi and Yinzhi. The early time mineralization material comes from porphyry himself and the later period mineralization material partly comes from in the Beitashan class.5. The mining area alteration is intense, the altered mineral reaches as high as above 50% and distribution is common.6. Through compare with Kalaxangeer copper deposit which located in the same belt, proved both ore rock body is the identical origin.7. The mining area most direct geochemistry prospecting symbol is Cu, Mo, Au and Ag; The most direct geophysical prospecting symbol is "one high and two low abnormal": the high polarization (is higher than 4×10^-2), the low resistance (is lower than 1000Ωm), the low magnetism (is lower than 300nT) and most direct stratum symbol for Beitashan class's in basic volcanic rock.