| Duo-long Ore concentration area located in the southern margin of the qiangtang–Sanjiang composite plates, north side of the Bangong co-Nujiang suture zone. Found in the belt of gold, copper, chromium and other occurrences ofmetal, which c-onstitute the Bangong co nujiang mining belt.Ore-bearing strata in ore concentration area to Quse group,Sewa group of Jurassic and Cretaceous lower Meiriqie group, Neogene lower Kangtuo group, mainly grey-grey green of high rockRidge petrochemical, green clay of petrochemical, Silicon metamorphicsandstone. Magmatic rock associated with mineralization Flash long mainly graniticporphyry rocks as a block structure. Rock dominated by spot-likestructure, visible rock edge with unequal particle structure, brecciated texture; Crystal matrix with granitic structures, implicit structure, micro-like structure and micro-crystal structure of nested, aphanitic structure. Ore bodies are mostly steep incline and the plate cylinder, vertical upward,middle and upper orebody of vein of disseminated chalcopyrite-dominated, in near-surface film of malachite, azurite; to the gradualtransition to sparse in the deep of disseminated chalcopyrite, coppergrade lower. Since the porphyry body to the surrounding rocks are broken down into:potassium, quartz-sericite, green coverage of rock band. The alterationzone of mineralization also has significant differences. Alteration zone size and occurrence of rock mass, form control, type ofalteration, the strength is related to distance the rock, altered at the rock,near rock with highly dominated by hydrothermal alteration, to the wall-rock alteration fade, and dominated by thermal contact alteration, away from the alteration of rock to weaken or disappear.Containing ore rocks mainly for the gray-green epidote, chloride quartz sandstone variable feldspar, with fine veins, dyeing, the copper mine, form indu strial ore body; Far from rock to the JiaoYan HeGongSe corrosion parts, withthe limonite. In the mineralization stronger areas on both sides of the fault andfracture subprime fracture structures is a very development. And mineralizationmainly for the magmatic rocks mengshan porphyry granite, rock are massive structure. Rock structure with erythema shape is given priority to, the edge of rock mass structure, ranging from visible breccia structure; The matrix with granite structure, hidden crystal structure, microscopic embedded chip structure, microscopic text like structure and crystal structure hidden quality. Ore body leans forward more for steep plate pillars, vertical, with fine ore bodies in the upper, pulse shape of chalcopyrite disseminated to give priority to. Since the porphyry bodies to surrounding rock can be divided as：potassic alteration zoneâ†'sericite quartz alteration zoneâ†'propylite alteration zoneâ†'taconite zone. In rock, near Rock alteration highly dominated by hydrothermal alteration,to the wall-rock alteration fade, and dominated by thermal contactalteration, away from the alteration of rock to weaken or disappear.During the long term against Duolong mining area of study and research,through comprehensive analysis of a large number of wild field observationsand laboratory research, in the District of porphyry copper metallogenic geological characteristics and controlling ore-forming geological conditions and geological markers and ore-searching direction has been made on the basis of amore objective understanding. Made a8ore-prospecting model information,such as porphyry ore features, the relationship between structure and copper ore,The altered characteristics of wall rock and the significance of ore prospecting,oxidation zone of ore body characteristics, the law about the formation with copper mineralization, the characteristics of geophysical copper mineralization, the characteristics of geochemical whith copper mine-ralization.In Duolong mining area geological characteristics, metallogenic regularityand prospecting direction of system analysis, and research on the basis and forgeological work in the region of poor situations. for the first time engineeringgrade and thickness of the product of ore body as a weighted feature analysismethod of weighting applied to Duolong regions rich in mineral prospectingto prediction the target areas. Ultimatlly optimizationed the prospecting target zone.On the base of target prospecting by geological deposit modeling method in the poor conditions, access to the research on district level results of quantitative estimation of target prediction resource, display the space on this area is a lot of prospecting.Working in geological prospecting target by deposit modeling methodunder weak conditions on gross target volume of resources levelquantitative forecast, based on Duolong ore concentration area, ore-controlling factors and prospecting model and combination of quantitativeinformation，Establishment of ore-controlling factors and prospecting and itscombination of quantitative information and forecast of resources betweenthe fitting function Y=0.122X1.288，And on fitting function parameters in detail to determine，get a study on the district level results of quantitative estimation of targetprediction resource, Naruo prediction of target resources of126.6x104tons, Saijiao prediction of target resources of191.25x104tons, indicatingan area there isa lot of prospecting space. Weighted feature analysis method applied to Duolong in regions rich inmineral prospecting prediction of target areas，not only Enrichment and development i to some extent a quantitative predictionmethod of prospecting target zone, Duolong ore concentration area, but also even the bangong co-nujiang metallogenic belt such geologicalprospecting prediction of the weak areas of work provides newunderstandings and experiences, theory and exploration with more important practical significance... |
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