秦岭造山带泥盆系热水沉积岩相应用研究及实例  

On Implications of the Devonian Hydrothermal Sedimentary Facies in the Qinling Orogeny

作　　者：方维萱[1] 张国伟[2] 胡瑞忠[1] 刘方杰[2] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放研究实验室 [2]西北大学地质学系,西安710069

出　　处：《沉积学报》2001年第1期48-54,共7页Acta Sedimentologica Sinica

基　　金：国家重大基础研究规划项目 !(G1 9990 4 32 0 0 );国家自然科学基金秦岭重点项目! (批准号 :49732 0 80 );中国有色金属工业总公司人

摘　　要：构造—热水沉积岩相与盆地的古地理环境 ,热水沉积岩相与热水沉积成矿 ,热 (水 )流体岩相与构造背景、构造古地理 ,它们之间有密切地内在联系 .应用热水沉积岩相、沉积相及沉积体系分析方法 。The Qinling orogenic belt is located in the central China and is one of the most important intracontinental orogeny in the world. Devonian sedimentary basins are the major accumulation structures for Au Ag Pb Zn deposits in the area. Fengtai Devonian pull apart basin, one of the accumulation basins in the Qinling orogeny, hosted a series of large superlarge Au Pb Zn deposits such as Qiandongshan and Dongtangzi large Pb Zn deposits and Baguamiao superlarge Au deposits. Lead zinc orebodies hosted at a suite of hydrothermal depositional rocks in the three order hydrothermal basins. Therefore, research on relationship between the hydrothermal depositional facies and the three order hydrothermal basin is the best way to understand the relationship between metal deposits and the hydrothermal depositional basin. The concept of hydrothermal sedimentary rock facies at the Devonian in the Qinling orogeny has been initiated. Relationships between tectonic hydrothermal sedimentary facies and paleo geographic framework of sedimentary basin, between hydrothermal sedimentary facies and mineralization of hydrothermal depositions, and between hydrothermal sedimentary facies and tectonic geographic framework are very important in the analysis of sedimentary basin. On the basis of associations of the hydrothermal sedimentary facies, sedimentary lithofacies, and sedimentary system, the Qiandongshan Shuangshipu third order hydrothermal depositional basin has been analyzed in this paper. Three depositional systems are recognized in the Qiandongshan Shuangshipu third order hydrothermal depositional basin. Carbonate rock formation was formed in a shallow water environment at the beginning of the three order basin while fine clastic rock formation was formed in a shallow water environment at the closedown of the three order basin. The hydrothermal depositional system between them was developed in half deep or deep water, limited, reducing environment in the three order hydrothermal basin. NE trending synfault w

关 键 词：热水沉积岩相 热水沉积盆地 泥盆系 秦岭造山带 成矿作用 沉积矿床 

分 类 号：P544.4[天文地球—构造地质学] P611.22[天文地球—地质学]