论文部分内容阅读
兰杰和贾比卢卡是至少占世界低成本铀储量20％的阿利盖特河铀矿田中最大的铀矿床。矿体产于早元古界变质沉积岩与1.65 Ga的科姆波尔吉砂岩建造问的不整合下面。这次研究是利用从60个含有各种矿物组合与结构的岩心全岩样品所获得的U—Pb同位素资料进行的。兰杰的样品资料得出确切年龄为1.74±0.2Ga,这与早先认为该矿床是古老矿床的意见是一致的。该1.74Ga明显属前科姆波尔吉期,因而兰杰矿床不会是更晚的地质作用形成的,可是,兰杰矿床
Lange and Jabiruka are the largest uranium deposits in the Aligateh uranium field accounting for at least 20% of the world’s low-cost uranium reserves. The orebodies were produced under the unconformity between the Early Proterozoic metasedimentary sediments and the 1.65 Ga Combeilgi sandstone. This study was conducted using U-Pb isotopic data obtained from 60 core samples of various cores that contain various mineral assemblages and structures. The sample data from Ranger show the exact age of 1.74 ± 0.2Ga, which is consistent with the earlier assertion that the deposit is an ancient deposit. The 1.74Ga is clearly ex-Qompo-Bourgeois so that the Lanthan deposit will not be formed by later geological processes. However,