论文部分内容阅读
十万大山盆地位于扬子陆块和南华活动带结合部,为印支运动后形成的断陷盆地,是我国南方重要的中生代产铀盆地之一。十万大山盆地基底主要为古生界,部分为中下三叠统和海西期花岗岩。其中西北部为晚古生代和中三叠世的碳酸盐岩、砂页岩、酸性火山岩;东南部主要为印支期花岗岩和上二叠统一下三叠统磨拉石建造。盆地盖层主要为中生界地层(大盆)和新生界地层(小盆)两个不同红色碎屑岩建造,具大盆套小盆双盖层构造特征,出露的地层从上三叠统、侏罗系、白垩系-古近系。其中侏罗系广泛发育的
The Shiwandashan Basin is located at the junction of the Yangtze Block and the South China Activity Belt, a faulted basin formed after the Indo-Chinese Movement. It is one of the important Mesozoic uranium basins in southern China. The basement of Shiwandashan Basin is mainly Paleozoic, partly from Middle-Lower Triassic and Hercynian granite. In the northwestern part, there are Late Paleozoic and Middle Triassic carbonate rocks, sand shale and acidic volcanic rock. The southeastern part is mainly composed of Indosinian granite and the Upper Permian Triassic molasse. The caprock of the basin is mainly composed of two different red clastic rocks in the Mesozoic strata (large basins) and the Cenozoic strata (small basins), with the features of large basin and small basin double caprock. The exposed strata are formed from the Upper Triassic System, Jurassic, Cretaceous - Paleogene. Jurassic which widely developed