江西相山矿田西北部与东南部矿床侵蚀程度的对比分析  

COMPARATIVE ANALYSIS OF THE EROSION DEGREE OF DEPOSITS IN THE NORTHWEST AND SOUTHEAST PARTS OF XIANGSHAN URANIUM OREFIELD IN JIANGXI

作　　者：张万良[1] 刘德长[2] 李子颖[2] 张静波[2] 

机构地区：[1]核工业270研究所,江西南昌330200 [2]核工业北京地质研究院,北京100029

出　　处：《大地构造与成矿学》2007年第3期348-352,共5页Geotectonica et Metallogenia

基　　金：核工业北京地质研究院<军用铀资源快速勘查与评价的遥感新技术研究>国防预研项目资助

摘　　要：江西相山铀矿田是我国赣杭成矿带西段火山岩系中的热液脉型铀矿田,矿床产于相山火山-侵入杂岩体内部及外侧,在空间上分布不均匀,东南部矿床较少,西北部矿床无论是数量还是品位都明显好于东南部。文章通过相山矿田西北部与东南部地貌形态、花岗斑岩产状、碎斑熔岩物化性质、成矿类型的对比分析,认为这种不均衡的矿床产出规律,不是成矿地质结构差异引起的,而是侵蚀程度不同所致。从矿田西北部到东南部,矿床侵蚀深度逐渐加大。Xiangshan orefield, situated in the volcanic rock series in the west part of Ganhang metallogenetic belt, is a hydrothermal vein type uranium orefield. The deposits, occurring in Xiangshan volcanic intrusive complex and its periphery, show non-symmetrical spatial distribution, as most of the deposits are concentrated in the northern and the western parts of the field, with only one deposit being located in the eastern part and only small occurrences in the central and southern parts. This paper is focused on a comparative analysis of the physiognomy, granite-porphyry attitude, physical-chemical features of the porphyroclastic lava, metallogenic type in the northwest and southeast parts of the field. It was concluded that the non-symmetrical spatial distribution of the deposits is not caused by the difference in the metallogenetic geological structure, but by the difference in the erosion degree of the deposits, since the field observation indicates that from the northwest part to the southeast part the degree of erosion increases gradually.

关 键 词：矿床分布 成矿类型 侵蚀程度 相山铀矿田 

分 类 号：P611[天文地球—矿床学]