Huize Pb-zn Deposits Of Ore-controlling Conditions And Mineralization Forecast

Huize Lead&Zinc ore deposit is located the southwest edge of the Yangzi plateform and east of the Xikang-Yunnan axis, its east was controlled by the Zhaotong-Qujing concealed fault and its west controlled by the Xiaojiang fault. Experienced three minaralling periods, including the exhalative hydrothermal sedimentation,pneumatoly-hydrothermal superimposition and multi-period tectonic reformation, a Lead&Zinc ore deposit concentrated area , which made of Kuangshanchang, Qilinchang,Dashuichang giant-scaled Lead&Zinc ore deposits and Yingchangpo samll-scaled Ag-Pb-Zn deposit and so on,is formed.This article is embarked from the basic geology research. Through sections-surveying and spot-observing, a large quantity of first-hand geology data have been collected.. After that, Metallization and deposit genesis studies were maken by the analysis of much macroscopical and microscopical information. At last ,a conclusion that the ore was deposited under the exhalative hydrothermal sedimentation reformed by the pneumatoly-hydrothermal superimposition in the environment of the early coal epoch basin, was made . The deposit is obviously controlled by the in the early coal epoch layer and faults between the layers. The deposit is characristiced by layer-fracture-miner united construction.On the foundation, combining mineration construction with structure-mineral reformation, the macroscopical studies with microscopical studies, the author summed up the hydrothermal sedimentation characters of Huize Lead%Zinc ore deposit. The main outcomes are showed in the following orders:1. The paper has discussed the metallogenic source and physic-chemical conditions by the study of geochemical features of enclave , isotopes, trace elements and rare elements. It considered that the genetic type of Huize Lead&Zinc ore deposit is an exhalative hydrothermal sedimentation reformed by the pneumatoly-hydrothermal superimposit ion.2. Through the geology investigation in the region, five sect ions have been surveyed and compared with each other's section data and pillar diagram from southwest to northeast. As a result, the deposit is obviously controlled by the layer andpetrography. The ore-body is mainly deposited in the purple red .shallow purple medium-macro crystal dolomite which was influenced hy exhalative hydrothermation. 3. The ore-forming criteria for the prognoses of metallogenesis are proposed on the basis of the comprehensive studies. According to the criteria,the favourable targets for ore-forming are enclosed, and the prospects of them are inferred.