摘要
南秦岭中晚古生界沉积区属造山前盆地，中泥盆世发生的海底喷流沉积事件及随后进入造山期的构造发展进程决定了本区成矿作用的基本类型及其演化。产于泥盆系中的各类铅锌矿床、铜矿床和金矿床不同程度具层控性质，矿化均与以钠长岩、硅质岩、富铁镁碳酸盐岩为特征的热水沉积或蚀变有较密切联系。基于矿床时空分布，矿物组合及共生顺序以及成矿作用演化的分析，确定它们可能是一个与热水沉积作用有关的成矿系列。这个成矿系列的建立对我国西部古生代褶皱带区域成矿研究有重要对比意义。
The South Qinling middle-late Palaeozoic sedimentary region is a pre--orogenic basin.The submarine exhalative events in the middle Devonian and the subsequent orogenic tectonic processes determinedthe primary mineralization types and their evolution.The various types of Pb-Zn,Cu and An deposits occurred in the Devonian strata are all somewhat stratabound.The mineralization are closely related to exhalative-sediments or alterations characterized by albitite, silicious rocks and carbonate rocks rich in iron-magnesium. Analysis of the time-spatial distribution,mineral association and paragenesis as well as evolution ofthe mineralization reveals that these deposits constitute a metallogenic series related to exhalative-sedimentation.The reconstruction of the series is of considerable significance in the correlative studies of regionalmetallogeny in comparable areas of west China.
基金
地矿部八五重要基础研究项目
关键词
秦岭
泥盆系
热水沉积
成矿作用
成矿系列
Devonian,exhalative-sedimentation,mineralization, metallogenic series,Qinling
