METALLOGENESIS OF GOLD DEPOSITS IN E'HU CONCENTRATION REGION OF GOLD MINERALIZATION IN JIANGXI PROVINCE

The northern part of Jingdezhen is an area with great potential for gold deposit in Northeastern Jiangxi Province. The Ehu concentration region of gold mineralization is a representative which has been discovered in recent years. The genetic type of the gold deposits in the region is of sheared quartz-vein zone formed in the ductile shear zone with superimposed brittle crash (also named as post-shear zone quartz vine). The gold deposits are characterized by the united control of ductile shear zones, Proterozoic strata, and Ehu granodiorite complex and lamprophyre in space. The gold mineralization commonly distributes in large areas and with a large quantity of ore bodies extending steadily along trends but variously along dips. The ores are of poor-sulphite type. The wallrock alterations are dominated by silicification, sericitization, pyritization, ank eritization, chloritization and carbonatization. The gold mineralization is closely related to the silicification, sericitization and pyritization. The values of δ³⁴S of the pyrites in the ores of Dabeiwu gold deposit range from -4.9‰to -7.1‰, showing that the sulphur was dominantly derived from the epimetamorphos ed marine sedimentary rock series. The values of the δ¹⁸O, δD_H2O and δC refle ct that the metallogenic fluid was composed by the mixture of magmatic solution and metamorphic solution.