Yunnan Yimen The Fengshan Copper Bed Pierced Body Structure And Location Prediction Research, Concealed Deposits

The Doctoral dissertation topics based on the Projects of Superseding Resources Exploration for the State Crisis Mine-"The Deep Superseding Resources Exploration of application of new technologies in Sanjiachang copper deposit, Yimen, Yunnan Province(No.2006530098) ",National Science and Technology Support Program-"the research of deep and peripheral Exploration technology in Dongchuan-Yimen Copper belt (No.2006BAB01B09)" and Superseding Resources Explorration for the State Crisis Mine-"Summary of Metallogenic regularity ofStratabound Polymetallic deposits in the southwest of China (No.20089943)".By studying the diapir of Fengshan copper deposit Detailed. It divides the diapir into ore-type and non-ore-type. Summarizes the spatial distribution, material composition and geochemical characteristics between two types of diapir, established the identification marks of the two type diapir which play an important role in the depth ore-finding prognosis. Between the Two types of diapir and its adjacent rock element geochemistry variation show that the ore-type diapir is closely related with the mineralization. discovered deep gabbro intrusions in Fengshan copper deposit, summarizes the gabbro Characteristics of Petrology and geochemistry.Summarizes the diapir structural ore controlling regularily and Positioning mechanism of ore body in Fengshan copper deposit, and application the methods of classification of diapir, Diapir structure-facies and tectono-geochemical to localizate and prognosis of concealed orebodies in Fengshan copper deposit.(1) It divides the diapir into ore-type and non-ore-type. Comparison of the two types of diapir characteristics of macro-geological, petrology and geochemistry, established the identification marks of the two type diapir, and proposed the formation mechanism of diapir.(2) Elements and oxides related to mineralization has the characteristics of migration from ore-type diapir→Silicified dolomite alteration→dark gray dolomite, element geochemistry studies have shown that the ore-type diapir and alteration of silicified dolomite have experienced strong tectonic deformation and thermal fluids, and mineralization is closely related. non-ore-type diapir have a small range of lateral alteration, structural deformation is weak, there is no obvious thermal fluid flow, and mineralization is not obvious. (3) Fengshan copper deposit mineral zoning characteristics in level and tectono-geochemical anomalies reflect the flow of ore fluids from the diapir→adjacent rock. Discovered magmatic hydrothermal activity with copper mineralization in Fengshan copper deposit ore-type diapir. That indicated that diapir tectonic period occurred magmatic hydrothermal copper mineralization superimposed in Fengshan copper deposit. Body piercing rock (ore) fabric reflects Structural alteration in the process of piercing structure transformation, the fluid extraction of minerals in the underlying strata into favorable positions is the main mineralization in Fengshan copper deposit.(4) Based on researching the relationship of diapir,ore bodys and structure of controlling diapir and ore bodys, it summarizes the positioning mechanism of ore body in Fengshan copper deposit, the ore-type diapir control the positioning of Fengshan copper deposit.(5) Application of diapir structure-facies and tectono-geochemical to Metallogenic Prognosis in Fengshan copper deposit, and establishment of a suitable Prospecting Prognosis method in Fengshan copper deposit. whereby Established prospecting of Fengshan copper deposit, and enclosed prospecting areas.