The Middle Proterozoic Jiuling Group, one of the most important geologic unit in the Northwest Jiangxi Terrain, is a kind of An-bearing formation with a An-Ag-As associahon, and itsgeotectonic sethng belongs to the AC...The Middle Proterozoic Jiuling Group, one of the most important geologic unit in the Northwest Jiangxi Terrain, is a kind of An-bearing formation with a An-Ag-As associahon, and itsgeotectonic sethng belongs to the ACM area. Granihfication can supply An with favorable com-plexing agents. Later granitification is of much more significance in boneralizahon. Regional Anmineralisahon includes two types: metamorPhic hydrothermal solo-An mineralization in the northernpart and magma hydrothermal superimposed polymetallic mineralization with An, Ag, etc, beingdominant in the southern part. Regional exploration should center around the Jiuling Group, smallgranite bodies of later periods and fault structures, while paying attention to the anomalies of trace elements such as Au, Ag, As, Pb, Zn, etc.展开更多
Two types of gold ores,siliceous mylonite and quartz vein,formed at the first and second stages of mineralization respectively, can be clearly recognized in the shear zone-hosted gold deposit at Jinshan, Jiangxi.Simil...Two types of gold ores,siliceous mylonite and quartz vein,formed at the first and second stages of mineralization respectively, can be clearly recognized in the shear zone-hosted gold deposit at Jinshan, Jiangxi.Similarity in REE and trace elements between the siliceous mylonite and the country rocks indicates that the ore metals were supplied by the surrounding strata during the first stage of mineralization.On the other hand, as indicated by fluid inclusion data,the ore-forming fluid at the second stage was of meteoric origin and the precipitation of gold was caused by phase separation.展开更多
文摘The Middle Proterozoic Jiuling Group, one of the most important geologic unit in the Northwest Jiangxi Terrain, is a kind of An-bearing formation with a An-Ag-As associahon, and itsgeotectonic sethng belongs to the ACM area. Granihfication can supply An with favorable com-plexing agents. Later granitification is of much more significance in boneralizahon. Regional Anmineralisahon includes two types: metamorPhic hydrothermal solo-An mineralization in the northernpart and magma hydrothermal superimposed polymetallic mineralization with An, Ag, etc, beingdominant in the southern part. Regional exploration should center around the Jiuling Group, smallgranite bodies of later periods and fault structures, while paying attention to the anomalies of trace elements such as Au, Ag, As, Pb, Zn, etc.
文摘Two types of gold ores,siliceous mylonite and quartz vein,formed at the first and second stages of mineralization respectively, can be clearly recognized in the shear zone-hosted gold deposit at Jinshan, Jiangxi.Similarity in REE and trace elements between the siliceous mylonite and the country rocks indicates that the ore metals were supplied by the surrounding strata during the first stage of mineralization.On the other hand, as indicated by fluid inclusion data,the ore-forming fluid at the second stage was of meteoric origin and the precipitation of gold was caused by phase separation.
