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目前,在世界许多地盾和古地台地区发现了大量铀矿床,它们赋存于结晶片岩、变质砾岩、片麻岩和不同成分的花岗岩类岩石当中。这些矿床的产状呈层状、柱状、细脉浸染状及脉状分布。据同位素年龄测定,它们的时代系前寒武纪,从成矿条件来看它们与变质作用有密切的关系。这类矿床往往构成巨大的含矿区,蕴藏着可观的铀储量。有鉴于此,这些矿床经常引起许多地质和采矿人员的关注。诸如早为人们所熟知的加拿大布兰德河和南非维特瓦特斯兰德的层状含铀砾岩矿床、澳大利亚北部阿利盖特河结晶片岩中的层状和柱状矿床、加拿大阿萨巴斯卡湖细脉浸染状钠-铀建造矿床以及瑞典北部阿尔汶朴罗·阿尔维约尔含矿省等,就是这类矿床的实例。
At present, many uranium deposits have been found in many shields and palaplads in the world. They occur in crystalline schist, metamorphic conglomerate, gneiss and granitic rocks of different compositions. The occurrence of these deposits are layered, columnar, vein disseminated and vein-like distribution. According to the isotopic dating, their age is pre-Cambrian, and they are closely related to the metamorphism from the perspective of metallogenic conditions. Such deposits often constitute a huge mining area, containing a considerable amount of uranium reserves. In view of this, these deposits often attract the attention of many geologists and miners. Such as the well-known stratigraphic uranium-bearing conglomerate deposits of the Bland River in Canada and Wirt Watts Land in South Africa, the stratiform and columnar deposits in the allegheny schist schist of northern Australia, the Athabasca Lake in Canada An example of this type of deposit is the veinlet disseminated sodium-uranium deposit and the mining town of Porvoo Alvieuil in the county of Arbon in northern Sweden.