Study On Typomorphic Features Of Some Minerals In Typical Ore Deposits In The Yuebei Region, Northern Guandong Area

Yuebei region is one of the important mineralized zone of nonferrous metal and sulphur in China. The deposit such as Copper, lead, zinc, mercury, stibium,pyrite spread aroud Renhua of Yuebei, Lechang, Yingde and so on. Besides Fankou, Dabaoshan and Yingde are known large non-ferrous metal and pyrite bed,other medium and small scale deposits and mineralized spots scatter everywhere. These depositsmostlty exist in the middle-late Devonian strata, others exist in carboniferrous.By study the deposit geological feature and the typomorphic feature of iron pyrites, galenite, sphalerite in Fankou, Hongyan, Dabaoshan three typic deposits, so the writer establish the genesis of these deposits and mode of searching mineral, suppose deep condition of theses deposits, and set on the future searching- target around the mineralized region. That offer very valuable referential material for future searching mineral.In recent years, many deposits were confronted with reserves crisis in Yuebei region. So we studied the typomorphic feature of pyrites, galenite, sphalerite for deposit of Yuebei region, and sum up the genesis of deposit and mineral and reseaching typmorphic feature, these have important value to forecast the deepth of deposit and reaserch the outside of deposit. And we compared these deposits for the geological feature and the typmorphic feature of pyrite , galenite, shphalerite which provide mineral basis for prospective value and reserching target of these deposits.By analyzing and generalizing minerogenetic and geological background, mineral constituent, rare-earth element, isotope and typomorphic feature of sulpurization mineral, finally, we made a conclusion that Fankou desposit resulted from the hot spring eruption at the bottom of sea, it has a character of syngenetic sedimentary deposit, which was affected by the late hydrothermal superimposed and light rebuilding after it came into being, which is typical SEDEX bedded-controlled deposit. We forecasted that the deposit was very prospective yet by study the thermoelectric feature of pyrite and supposing the deepth of the deposit, and that have been proved by practice.By study Dabaoshan deposit on minerogenetic and geological background, mineral constituent, rare-earth element, isotope and typomorphic feature of sulpurization mineral, finally, we made a conclusion that Dabaoshan deposit resulted from the volcanic deposition which type is laterebuilt and magma hydrothermal superimposed. We found the upside of Dabaoshan deposit have been denuded or oxidized, bassically,it have reached the lowest part of the deposit.By study Hongyan deposit on minerogenetic and geological background, mineral constituent, rock alteration,rare-earth element, isotope and typomorphic feature of sulpurization mineral, we made a conclusion that the feature of haongyan isdeposition-rebuilding desposit. We have sutdied the thermoelectric feature of pyrite and evaluated the prospect of the deposit. We estimated that only small part of deposit have been denuded, most part of deposit preserve perfectly yet, and the deepth of the deposit is very prospective.