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含有0.03—0.05%U_3O_8的铀矿床产于岩浆晚期分异物中。白岗岩、淡色花岗岩、黑云母花岗岩和黑云母石英二长岩(为相似成分的网状细晶岩和伟晶岩脉所侵入)是“斑岩型”铀矿床的有利主岩。晶质铀矿和放射性黑色矿物是主要矿石矿物。铀还呈离子和分子侵染状态产出。“斑岩型”铀矿床的例子有纳米比亚的罗辛铀矿床,加拿大的查理波伊斯湖,澳大利亚的克罗克威尔和美国爱达荷州中部和华盛顿州东北部地区。这种矿床很容易在干燥气候的地区发现,未变质的岩石可能是最有利的主岩。
Uranium deposits containing 0.03-0.05% of U_3O_8 are produced in late magmatism. White granite, pale granite, biotite granite and biotite quartz monzonite (intrusions of similar components of reticular and pegmatite veins) are favorable host rocks of the “porphyry” uranium deposit. Crystalline uranium and radioactive black minerals are the main ore minerals. Uranium is also ionized and molecularly infested state output. Examples of “porphyry” uranium deposits are the Losin uranium deposit in Namibia, Lake Charles Lake in Canada, Crockwell in Australia, and the central part of Idaho and Northeastern Washington in the United States. This deposit is easily found in dry climates, where unmodified rock may be the most favorable host rock.