赣西北地体Au分布及其成矿地球化学研究

GEOCHEMICAL STUDIES ON Au DISTNBUTION AND MINERALIZATION IN NOTHWEST JIANGXI TERRAIN

Middle Proterozoic Jiuling Group, one of the most important geologic units in the Nothwest Jiangxi Terrain, is a Au-bearing formation with Au-Ag-As association and its geotectonic setting belongs to ACM area. Granitization can supply Au with favour complexing agents and the later periodic granitization is much more significant to minezliraation. Regional Au mineralization includes two types, metamorphic fluid Au in northern area and magnmtic fluid Au, Ag etc polymetallic association in southern area. Regional exploration should center on the Jiuling Group, small granite bodies of later period and faulting structures, paying attention to the anomaly of Au, Ag, As, Pb, Zn etc trace elements.