Yunnan Province Longling Mengxing Lead And Zinc Mineralization Forecast

With the increasing difficulties of ore-prospecting, development of Geology and application of new theories and new technologies, forecast of ore-formation is changing from single geology information to multi-geology information. Fixed in quality transform into the combination of the fixed-quality and fixed-quantity, even the full form of fixed-quantity. Utilizing the information of Geology, Geophysics, Geochemistry and Remote-Sensing synthetically, it is a main research method of the current forecast of ore-formation to realize the analysis and comprehension of the fixed-quality and fixed-quantity currently.This paper is sponsored by the project,Localization-prognosis and Research on the Deep and Surroundings of MengXing Lead-Zinc mine,YunNan Province. With the support of the software platform of GIS, collect,store,retrieve,analyse the spatial information of Geology,Geophysics,Geochemistry and remote sensing. Utilizing the comprehensive information ore-formation prognosis,investigate new resources at the deep and surroundings of this mine and relieve the crisis.MengXing lead-zinc mine was established in June 1958,it's a large deposit of poly-metal sulfide.But the resource is drying up by the mining since 1958.This paper obtain some cognition and achievements,as follows:1. MengXing lead-zinc mine is a reworked sedimentary deposit.Geologic strata controls the orebody apparently. SN-trending fracture may control the movement of hydrothermal fluid.2.Building the multi-source geo-information database,accomplish the management of spatial data and attribute data, extract and filter ore-prospecting information quickly.3.Process the ETM+ image by utilizing the digital image processing's methods,extract remote sensing mineralization and alteration information,interpret the line structure and ring structure. Acquisition a great deal of fixed-quantity information by means of MORPAS just as equi-density, average direction, item quantity, outstanding degrees,symmetry degree of centre.Summarize the prospecting model of remote sensing. We consider that the crossing of SN trending and EW trending is benefit to the formation of oreshoot.4.Discover the abnormity of geochemical secondary halo in the western of MengXing syncline. Hydrothermal fluid diffuse through the structural flaw.And the abnormity may be related to the hydrothermal fluid. .There may be some places to find the ore-body.5. Through the research on Geophysical characteristics in the known area, develop the analysis in the unknown area.There are eight abnormal belts in the mine field.They declare that there may be some ore-bodys under the ground. 6.Summarize the mineralization regularity by analyzing the ore controlling factors and ore-prospecting marks.Synthesize the ore-prospecting information of Geology, Geophysics, Geochemistry and Remote-Sensing,create the ore-prospecting model of comprehensive information minerogenic prognosis. Eight prospecting target areas are lined out. There are two target areas of class 1,two target areas of class 2 and four target areas of class 3.And 876,312 ton ore is found in target areas of I₁ and I₂ after the engineering testing.