Genetic Mineralogy In Gold Ore-forming Belt Of Muping-Rushan In Jiaodong

Jiaodong region is an important gold production base， Gold Ore-forming Belt ofMuping-Rushan as one of Jiaodong three gold Ore-forming Belt， the areadistribution of a number of large， medium and small-scale gold deposits（point）． The predecessors made a lot of research on gold deposits within the GoldOre-forming Belt of Muping-Rushan such as Jingqingding， Denggezhuang andYinggezhuang gold deposits， but little research on the other gold deposits（point） within the Gold Ore-forming Belt of Muping-Rushan， the lack of in-depthstudy about resource evaluation and prospecting direction．This study mainly basedon the research deeper level such as Jinqingding， Deng Zhuang， Yinggezhuanggold deposits， combined with the other gold deposits（points） within the GoldOre-forming Belt of Muping-Rushan， focusing on study on genetic mineralogy ofpyrite and quartz in metallogenic belt， to explore on ore genesis and mineralizationregularity of metallogenic belt， and forecast the resources prospect of metallogenicbelt．The ore types are mainly quartz-pyrite ores and polymetallic sulfide ores in thisarea，Ore mineral composed of pyrite， quartz and carbonate minerals．The texturesof ores are dominated by automorphic， hypautomorphic and anhedral granulartexture and cataclastic texture．The structures of ores are predominant in massivestructure，disseminated structure and vein structure．The gold minerals in the form ofenclosed gold，intergranular gold and fissure gold．The mineralization stages containpyrite-quartz，quartz-pyrite，polymetallic sulfides and quartz-carbonate stages．The genetic mineralogy research of pyrite shows thermoelectric coefficient ofpyrite is during-250³50μV/℃，The P-type pyrite average rate of55%．From northto south and from east to west in this area，thermoelectric developed from N-type toP-type， P%in the northwest is much larger than the southeast， it is can beinferred the degree of development of gold body in the northwest is better than thesoutheast，including the Chujiagou，Tangjiagou and Shuangshanzi showed that thegood mineralization information of mineralization．The S and Pb isopope of this are ore minerals analysis results show that ore-forming fluids with multi-source， thesource come from the crust-mantle mixing fluid base on crustal source．The genetic mineralogy research of quartz shows that the thermoluminescencepeak temperature is between185²95℃， belong mid temperature peak． Quartzthermoluminescence intensity is between15000¹40000μC， double and sharpunimodality of peak are show the good mineralization． The hydrothermal fluidbasically belongs to the CO₂-H₂O-NaCl system of Gold Ore-forming Belt ofMuping-Rushan， fluid inclusions are small， uneven distribution， thehomogenization temperature is concentrated between240℃to320℃．Salinity isconcentrated between4.03%to12.85%， average salinity is8.52%． thefluiddensity is concentrated between0.84to0.98g/cm3， an average of0.92g/cm3.Mineralization pressure was concentrated in the50⁷5MPa and average of66Mpa，mineralization depth focus on the6.1⁷.5km， average of7.2km． The results showthat ore-forming belt fluids is moderate to low temperature， low salinity and lowdensity．According to comprehensive analyse show that the mine deposits in this area ofXiaoqing,Shuangshanzi, Biniushan, etc. have good potential information ofmineralization.