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
Based on the geological and geochemical studies on the Middle Proterozoic Jiuling Group in the Northwest Jiangxi Terrain, it is ascertained that this group is a kind of Au-bearing formation with Au-Ag-As association, ...Based on the geological and geochemical studies on the Middle Proterozoic Jiuling Group in the Northwest Jiangxi Terrain, it is ascertained that this group is a kind of Au-bearing formation with Au-Ag-As association, and the volcanism is the key to its foundation. The Jiuling Group can be divided into two geochemical groups: high-Au layers and low-Au layers, which is due to the inhomogeneous metamorphic reformation. The discriminant functions F_1& F_2 can be established by means of Au, Ag, As, Ti, Cr, V, etc. eleven elements, and the diagram of F_1-F_2 is the distinguishing sign of the Au-bearing formation. Based on the systematic studies on two types of gold mineralization, namely, solo gold with metamorphic fluid and Au, Ag, etc. polymetallic association with magmatic fluid, the authors establish the metallogenic model of gold deposits in the area.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.
基金Project supported by the National Natural Science Foundation of China.
文摘Based on the geological and geochemical studies on the Middle Proterozoic Jiuling Group in the Northwest Jiangxi Terrain, it is ascertained that this group is a kind of Au-bearing formation with Au-Ag-As association, and the volcanism is the key to its foundation. The Jiuling Group can be divided into two geochemical groups: high-Au layers and low-Au layers, which is due to the inhomogeneous metamorphic reformation. The discriminant functions F_1& F_2 can be established by means of Au, Ag, As, Ti, Cr, V, etc. eleven elements, and the diagram of F_1-F_2 is the distinguishing sign of the Au-bearing formation. Based on the systematic studies on two types of gold mineralization, namely, solo gold with metamorphic fluid and Au, Ag, etc. polymetallic association with magmatic fluid, the authors establish the metallogenic model of gold deposits in the area.
