The Metallogenic Laws And Metallogenic Prediction Of The Jinqingding Gold Deposits, In Rushan, Jiaodong Peninsual

Jinqingding gold deposit is the largest quartz vein type single vein gold deposit, built in 1970, after nearly 40 years of mining, recently the reserves of mine is obviously inadequate, has become a crisis mines, to evaluate their deep of the prospects for mineralization and to specified prospecting is an unavoidable-needed practical problems to solve. Based on the comprehensive analysis of the data available, combined with field work in the observed phenomena and the basis of information collected by the regional geological background, geological characteristics and tectonic、stratigraphic,、magmatic rocks and gold Relationship, Summing up the ore accumulation, and have a vision forecasting to the deep of Jinqingding gold deposit from the aspect of primary superimposed halo, has achieved the following results and understanding of:1. By studying sulfur, lead, hydrogen and oxygen isotope composition of that gold deposit, the direct source of minerals deposits is surrounding rock of gold deposit—Kunyushan granite, while the complex formed with the crust and mantle formation which constitutes Jiaodong group, is the initial source of ore. Initial fluid of gold deposit is magma water-based fluid, but later suffered in the mineralization of mixed precipitation.2. By studying the strata, magmatic rocks, structure and relationship of gold deposit, Jiaodong group is the initial source of ore for gold mineralization, and provides the source material. While Jingshan group formed part of the gold catalyst. On the one hand igneous rocks powered heat mineralization and mineralization agent, on the other hand igneous rocks provide some of the ore-forming materials. Structures promote activation and migration of the materials, provide for the occurrence of ore-forming fluid circulation space and provide access for the ore.3. Jinqingding gold deposit has following accumulation:①Fault intersection, branches breaking "into the" shape convergence is the favorable ore storage site;②Overall tensile shear fracture has the local open site, whose trend is NNE-NE,And its tendency change slowly from steep department, which showed a fracture in the space "S" or the anti-"S" shape change is that lots of this area rich ore body;③ore bodies occur in the plane pinch reproduction, en echelon arrangement of the phenomenon, the overall ore body was left band side of the column.4. Through studying to vertical longitudinal projection of primary superimposed halo of the Jinqingding gold deposits,predict the region of 21 to29 lines , -900m to -1200 m in deep,exist the blind ore bodies.