• 责任者：Jiang Shaoyong (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Xu Yaoming
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：铜矿 ; copper ores ; 多金属矿 ; polymetallic ores ; 长江中下游成矿带 ; Metallogenic Belt of Middle and Lower Reaches of Yangtze River
• 页码：p.4051-4068
• 图表：13 illus., 4 tables, 87 refs.
• 分类号：1001
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     Jiurui is one of the most important Cu-Au ore district in the Lower-Middle Yangtze Valley metallogenic belt in China. There are generally two ore-forming stages in this belt, one is the Hercynian syn-sedimentary hydrothermal mineralization stage （mainly Fe-S） and the second stage is the Yanshanian magmatic-hydrothermal stage （mainly Cu-Au-Mo）. Based on investigations and studies on regional structures, magmatic rocks, and various types of mineralization in the Jiurui district, we summarized the main features of structure, magmatism and mineralization in the Jiurui district. There are two main fault structures in the district that controlled the magmatic emplacement and related mineralization, namely, the strike over step thrust zones with NEE （near EW） direction and brittle-ductile character, and the transcurrent fracture fault zones with SN （near SN） direction and tonsil-torsion character. These two groups of the faults constitute a tectonic framework in the region which looks like a Chinese word ＂well＂, and they controlled the magmatic rocks and related mineralization. There are various types of magmatic rocks in this district, with the main types of grandiorite porphyry and quartz diorite-porphyry. These rocks were emplaced during the Early-Middle Yanshanian stage of 138~148Ma. These rocks display various shapes, including apophysis, harpolith, sheet, dyke, and stock. The igneous sheets and dykes are distributed along the thrust zones with NEE direction. In particular, they appear along a faulted structure with a special ＂Y＂ shape structure. But the stocks were emplaced at the cross place between the NEE direction and SN direction fault, and these rocks have a close relation with the mineralization. In this paper, we emphasized the SN direction tension faults and their controls on emplacement of granitic porphyry and related mineralization. We have identified four groups of fault with the SN direction of tonsil-torsion character in this district. We suggest that it is worth to pay more attention to the cross places between the Songjiawan-Yanjiacun line and the NEE faults for more detailed exploration. The major mineralization types in the Jiurui district include skarn type, porphyry type （including crypto-explosive breccia type）, the superimposed stratabound type, and hydrothermal vein type. In a particular ore deposit, it may be a combination of various types of mineralization. For example, the Wushan deposit is a combination of skarn and superimposed stratabound ores, the Chengmenshan ore deposit is a combination of skarn, porphyry and superimposed stratabound ores.