【摘要】 江西德兴地区是我国东部成矿带中的大型矿集区之一 ,集中了铜厂斑岩铜矿、银山多金属矿和金山金矿等大型、超大型矿床。它又处在中国东南部大地构造的关键部位 ,因此 ,对德兴大型铜金矿集区的研究始终与该地区的构造背景及演化相伴随。目前对该地区构造格局的认识以 NW侧的九岭地体与 SE侧的怀玉地体沿赣东北深大断裂带的碰撞拼贴为主流 ;在这两个地体于晚元古代碰撞拼贴之后 ,该地区所经历的主要是板内 (陆内 )的构造活动。德兴大型铜金矿集区的成矿作用与燕山期构造—岩浆活动有着成因上的密切联系 ,而德兴地区的中元古界地层成矿元素含量较高 ,不同程度地为本区铜厂、金山、银山等矿床提供了成矿物质。成矿流体的研究成果已表明不同的矿床有不同的流体过程 :铜厂斑岩铜矿成矿早阶段以岩浆派生流体为主、而晚阶段 (主要成矿阶段 )有大气降水的大量参与 ;银山多金属矿成矿流体主要为大气降水来源 ;金山金矿的成矿流体则以变质水为重要来源。更多还原

【Abstract】 Dexing area of northeast Jiangxi province is one of the large ore concentrating areas in the Eastern Metallogenic Belt of China, which includes several large or superlarge ore deposits such as Tongchang porphyry copper deposit, Yinshan polymetallic deposit and Jinshan gold deposit. The area is geotectonically located in an important place of southeast China, therefore the study of Cu Au mineralisation in this area is always associated with that of tectonic setting and evolution. The tectonic framework of Dexing area is the collision between Jiuling terrane in the northwest and Huaiyu terrane in the southeast along the Northeast Jiangxi Deep Fault. After this collision in late Proterozoic, the area was mainly under the intraplate tectonic evolution. The mineralisation in Dexing large Cu Au ore concentrating area was closely related to the Yanshanian tectono magmatic activities, whereas the mid Proterozoic strata have higher concentrations of ore elements, which possibly provided ore forming materials to the ore deposits of the area. Studies on ore forming fluid show that different deposit has its own fluid system. The Tongchang porphyry copper deposit was predominated by magma derived fluid in the early stage and meteoric water in the late and major ore forming stage. The Yinshan poly metallic deposit was mainly formed by fluid of meteoric water origin. While the ore forming fluid of Jinshan gold deposit was mainly metamorphic water formed in the ductile shearing deformation.更多还原