| Sareke glutenite copper deposits of Xinjiang Wuqia,which is located in the northwestern margin of the Tarim Basin of southwest Tianshan Mountains fold belt rift basin in the mountains. It puted a lot of manpower and resources since the year 1925 the first Soviet experts to carry out geological work and obtained congratulated harvest,by the end of 2015 exploration of new resources 800,000 tons, estimate expected resources amounted to 2 million tons of copper, Ag metal resources of 193.18 tons.The main mining area at copper north ore belt,the main mineral is chalcocite,mineral assemblage is chalcocite-pyrite-bornite-azurite-calcite.Conglomerate outcropping see malachite, associated Ag metal.the main mineralization in conglomerates, gravel surrounding, cement and surface fragmentation of gravel,ore is mineralized conglomerate,it is strictly restricted by the conglomerate horizons,deposit has a strong stratabound characteristics,clear signs of hydrothermal activity, mineral surface to see the residual asphaltene.In short, the geological characteristics and geochemical characteristics of Sareke copper deposit have many studies.However,it is not pay attention and lack of relevant research for sedimentary filling characteristics of the ore formation, temporal and spatial distribution characteristics of ore bodies and the belongs to sedimentary facies of ore formation.This directly affects the excavations of concealed deposits, while restricting the production and construction of the mine.This paper selects sandstone and conglomerate-type copper-polymetallic deposits in the main mining area of Sareke copper ore belt north carry out a detailed catalog of the field section,catalog of drill core, statistical analysis of conglomerate gravel outcrop,and strata of catalog sections and drill core are divided sedimentary facies, subfacies, microfacies.Combined with stratigraphy, sequence stratigraphy, theory of the high resolution sequence stratigraphy dividing short-term, mid-cycle.Statistical analysis of conglomerate obtained the Φ value of the gravel particle size frequency distribution histograms, cumulative distribution, conglomerate size probability map.Finally, we calculate the mean value(Mz), standard deviation (σ), skewness (SK1) and kurtosis (KG) four parameters,which reflect gravel sedimentary environment. The four arguments put investment point coordinate system of Fremont Mander and Falk established.Results show Kuzigongsu Formation is alluvial fan (alluvial fan) deposition; Probability plot of size reflected alluvial gravel has its own characteristics, "approximate the curved arch" instead of the usual "rolling-Jump-Suspension" three-handling features.After orientation occurrence measurement of gravel, used strGraphPrj software horizontal correction of Paleocurrent and stereo software-generated rose diagram drawn Paleocurrent are NNE and NNW direction.On different positions of the alluvial fan flow to Divide alluvial sub-facies and microfacies,Studies have shown that alluvial fan root subfacies,middle fan subfacies, fan edge subfacies has exposed in north ore belt,Microfacies include more categories, divided into the main channel, braided trench overflow belt, braided sand island, side beach and wetlands.On the basis of the understand the causes of rock type,horizontal and vertical change,phase sequence and symbiosis sequence doing sedimentary strata cycle division and correlation. Kuzigongsu Formation in north ore belt is divided into a plurality of short-term cycles,Inherent genetic relationship of short-term cycles superposition MSC1, MSC2 two mid-cycle.MSCl and MSC2 are roughly half the decline in the mid-cycle and half rising middle cycle configuration,To understand the reason that generated a special combination of such cycles,Be analysising on Sedimentary filling characteristics of Kuzigongsu Formation.The causes special combination of the mid-cycle attributed to tectonic movement of two different activity intensity. |
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