| Long wan ore deposit is located in the south of Fozichong ore field,Which is located in the southeast city of Cen Xi and meaning county at the junction, his paper study on ore deposit ge-ology theory as the instruction, geophysical, geochemical and absorb fusion, such as information technology of the new theory, new method and new technology, the area more source infor-mation fusion and quantitative analysis, the abstract shape, the qualitative quantitative, thus to evaluate the study metallogenic conditions in the area, the analysis of the ore-controlling factors summarizes the metallogenic regularities, It determine the favorable prospecting and prospecting marks, and to forecast the target area. Through the study, the understanding and achievements:(1) we through detailed field investigation of light thin sections identification and buddhist at Kowloon bay deposit ore body mainly occurs in guangxi Yu Zhongao favorable on the seg-ment (O2b-2) on the formation, the main ore bodies are bedded, vein, lenticular output, orebody occurrence and basic consistent attitude of stratum; Wall rock alteration has the characteristics of the typical magmatic hydrothermal alteration. According to the mineral assemblage characteris-tics, ore type and fabric characteristics, mineral and mineral formation sequence interlock rela-tionship between research, main bodies are nervation ore-crumb structure, the ribbon-time block. Several typical of the low temperature liquid filling metasomatic ore structure formed by the transformation of function and overlay, at the same time, according to the structure of miner-al formation can be divided into the structure, which is formed by the crystallization structure, solid solution formed by the metasomatism of structure, formed by the separation of structure, which is formed by the pressure of which crystallization and structure which is formed by the metasomatism. Because the mining area of magma-structure and mineralization period of time and complexity, the metasomatism is extremely common, various type and combining previous discussed about the formation of ore deposit, preliminary that the ore deposit and middle-late yanshan movement in the acidic intrusive rocks is closely related to the porphyry granite and mineralization is characterized by multiple period stage.(2) the ore deposit geology and strata, rock mass containing ore can be thought of:Fozi-chong ore fields Longwan pb-zn deposit metallogenic time should be late yanshanian, part of its minerals from, O2b-2, O3b-2 stratum, due in part to late yanshanian magmatic intrusion of mantle and lower crust material. The formation of ore deposit has experienced two stage of mineraliza-tion. The First stage is the diagenetic mineralization stage, formed, O3b, O2b-2 primary source layer. Ore fields within, O3b-2 O2b-2 lead and zinc element content in formation and much higher than the Chinese continental crust element abundance value,It provides a rich source of material for later mineralization and good background. The second stage is the late yanshanian magmatic invasion stage. Block characteristics of rare earth elements content in lead and zinc ore and rock mass are similar, reflect the source of rare earths in the ore and the magma in the rare earth ho-mology, and mainly closely relationship with late yanshanian rock mass. Therefore, we can be thought of as the Fozichong ore field Longwan pb-zn deposit genesis should rush for sedimen-tary-magmatic hydrothermal superimposed transformation type.(3) the metallogenic conditions at the mine area and ore deposit geological feature analysis, think that the deposit is by the formation lithology, argillaceous limestone, calcium argillaceous siltstone), NNE tectonic fracture zone and granite porphyry trinity united control.(4) the land, material, more source information characteristics are analyzed, summarized and established a comprehensive information prospecting model of Longwan deposits in Guang-xi. the mining area has carried on the comprehensive information of metallogenic prediction by using the GIS spatial analysis function,It framed the prospecting target areas 8:3 I level target, 2 levels â…¡ target area, three â…¢ target area. |
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