关键词: 钨锡矿床, 成矿地质特征, 控矿作用, 等距性, 多位一体, 成矿预测, 九龙脑矿田, 赣南

Abstract: The Jiulongnao ore field is located in the Chongyi-Dayu-Shangyou W-Sn polymetallic ore concentration area of the eastern Nanling tectonic-magmatic metallogenic belt. It is polymetallic deposit characterized by the kind of mineralization combination of W-Sn-Ag-Pb-Zn-U-Nb-Ta, and produced around the Jiulongnao metallogenic rock body. There are five mineralization types, including quartz vein type, skarn type, broken altered zone type, greisen type, and altered granite type. The metallogenic period began in the Indosinian period and erupted in the Early Yanshanian period. The metallogenic parent rock is re-melted “S” type granite which is rich in ore-forming elements such as W and Sn. Based on the systematic research on the geological, geochemical, and geophysical data, this paper discusses the metallogenic geological characteristics and ore-controlling roles of formation, structure, and magmatic rocks. The metallogenic and geochemical zones of high temperature W-Sn deposit—medium-high temperature W-Pb-Zn-Ag deposit —medium temperature Au-Ag-Pb-Zn deposit are developed around the inner and outer contact zone of the Jiulongnao metallogenic rock body, showing an equidistant spatial distribution pattern of “east-west horizontal, NNE-NE vertical”. It can be  concluded that the tungsten-tin polymetallic deposits in this area are controlled by the combination of structure and magmatic rocks. Through this study, the metallogenic model of “multi-part integration” with genetic connection in the Jiulongnao ore field is established, the metallogenic prediction is carried out, and the ore-prospecting direction in Jiulongnao area is proposed.

Key words: W-Sn deposit, metallogenic geological characteristics, ore-controlling role, equidistant characteristics, multi-part integration, metallogenic prediction, Jiulongnao ore field, southern Jiangxi