Thermoelectric Characteristics Of Pyrite And Deep Prospecting Prediction In?Ore Body Of Heshangdong Copper Deposit,Lufeng County,Central Yun Nan

The thermoelectricity of pyrite is one of the important research contents of hydrothermal vein-type polymetallic deposits and the prediction of deep ore prospecting.Its indicating significance and application effect are obvious.At present,there are still some problems in research,such as its examples lack which this method can be applied to the metallogenic process of hydrothermal copper deposits and exploration.Its still needs to be explored about in-situ testing and data discrete quantification processing methods of the thermoelectric properties of pyrite.The Lufeng Heshangdong copper deposits are one of the representative deposits of the copper polymetallic metallogenic belt in central Yunnan.They show that the structure controls and hydrothermal vein type mineralization,has the characteristics of small differences in macro-geological conditions.These characteristics have caused prominent problems such as the difficulty of deep prospecting and the poor exploration effect.On the basis of systematic geological survey and exploration engineering cataloging of No.1 orebody of Heshangdong copper deposit,find the relationship between thermoelectricity and Cu grade,the influencing factors of pyrite thermoelectricity which using pyrite thermoelectricity spatial distribution characteristic analysis method.It is calculated about ore-forming temperature and spatial changes of the ore body.Its discussed that the evolution characteristics of ore-forming fluids.At last,the deep prospecting is predicted based on the geological characteristics of the ore body.This research mainly achieved the following results and understandings:1.The ore body I of the Heshangdong copper deposit is one of the main ore bodies of the deposit.It is a lenticular formation in the(Pt2l)strata.It is a dolomite hydrothermal vein copper deposit.The hydrothermal mineralization of copper ore bodies can be divided into hydrothermal mineralization stages(divided into pyrite stage,pyrite + chalcopyrite + bornite + quartz + dolomite + calcite stage,quartz +pyrite stage)And supergene oxidation period.2.The thermoelectric characteristics of pyrite about surrounding rock and copper-bearing have obvious differential evolution.The pyrite in copper-bearing ore has obvious spatial evolution characteristics of various conductivity types.3.The ore-forming temperature range 260?-340? calculated by the thermoelectric coefficient of pyrite is reasonable and reliable.The deposit is a medium-high temperature deposit.There are many characteristics of the mineralization temperature in the ore body,such as lower temperature in deep,the mineralization temperature decreases to the surroundings from the high temperature area in the upper middle of the ore body.4.The degree of copper mineralization enrichment is closely related to the number of pyrite particles,the occurrence rate of P-N-type pyrite,the dispersion degree of P-N-type pyrite,and the dispersion degree of the thermoelectric coefficient of the whole set of pyrite samples.5.By summarizing the thermoelectric characteristics of the ore body,it is speculated that there are still industrial ore bodies in the middle of the 1580 middle section 1# and 2# exploration lines,but the deep extension is small and the deep prospecting prospect is poor.This has been confirmed by later prospecting.At the same time,it shows that the thermoelectricity of pyrite can be used in the study of the mineralization process and prospecting prediction of hydrothermal copper deposits.