Study On The Geological Characteristics Of Laminar Breccia And The Meaning Of Prospecting Ore In MVT-typed Lead Zinc Ore District In Limei In The West Of Human

In the north and west of Hunan,Limei-layered lead zinc ore,being MVT lead-zinc deposit,is featured by low grade,huge scale along with relatively single mineral and is easy to select.It is the main prospecting style in exploration district in the garden of Zhang Jiajie in west Hunan with high economic benefits and scientific value.This ore deposit is accompanied by laminar breccia.Those that the formation time,spatial distribution,breccia sizes and its fragmentation have an influence on ores' intertwined forms and spatial output status,further,orebody distribution and ore's rich and poor outputs.Laminar breccia is a striking sign for studying regularity of ore's formation and prospecting distribution.It can be said that the formation and evolution of breccia in Limei ore distinct constitute this region's geological mineral development history.However,we are lack of systematic study of laminar breccia's spatial distribution,classification of alteration and ore-controlling conditions.That the study of breccia's distribution,classification of alteration and other things has a profound significance for studying the gold ore-controlling factors and mineralization enrichment parts to uncover the ore deposit's metallogenic mark in Limei ore district and its ore-prospecting breakthroughs.My study work benefits from the project that is geological study and the prospecting ore study in exploration district in the garden of Zhang Jiajie in west Hunan.Under the guideline of my tutor,I choose<<The distribution of Laminar Breccia,the Sorts of Metallogenic Mark and the Meaning of Prospecting Ore in Limei MVT-typed Lead Zinc Ore>>as the title of my thesis.On the basis of 2-year field geological experience and with laboratory analysis,observations under a microscope as well as comprehensive study,I have made a through study on the breccia within the research area according to spatial output horizon differentiation,fragmentation differences,characteristics of mineralization alteration and formation mechanism of breccia.Then I finish my thesis with the following progress:1?Draw up the three-dimensional map of laminar-breccia in Qingxu cave,Limei ore district.The map divides it with three parts--the upper,the middle and the loweraccording to more than 80 drills as well as 10 strip of actual measured sections.2?According to the alteration mineral type and altered complexity,I divide the types of laminar breccia into simple alteration mineral breccia type and complex alteration mineral breccia.Analysis shows that the second one's ore potentiality is much better.3?Put forward to look for the prospecting marks of breccia in ore-bearing horizon and rich ore horizon,.Regard simple alteration mineral breccia type as breccia prospecting marks of geological prospecting type and complex alteration mineral breccia as prospecting marks for looking for rich ore.