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俄罗斯外贝加尔地区晚侏罗世斯特列措夫破火山口中的铀矿床是世界上最大的与火山岩有关的铀矿区,铀储量为280 000 t U,是俄罗斯最大的铀资源产地。该破火山口地层柱大约1/3是强烈蚀变的流纹岩。斯特列措夫破火山口中的铀资源比世界上其他与火山有关的任何铀矿区都大得多,除了热液蚀变的功效之外,可能是由同等重要的两大铀来源造成的:破火山口中高度分异的侏罗纪流纹岩和基底中的海西期富铀亚碱性花岗岩;富铀亚碱性花岗岩中的主要含铀副矿物在发生热液成矿作用的时候都是变生非晶质矿物。
Uranium deposits in the Late Jurassic Strishov caldera outside Russia’s Baikal region are the largest volcanic-related uranium deposits in the world with a reserve of 280 000 t U, the largest source of uranium in Russia. About a third of the Caldera stratigraphic column is a strongly altered rhyolite. The uranium resources in the St Alemt caldera are much larger than any other volcano-related uranium deposit in the world and, besides the effectiveness of hydrothermal alteration, may be caused by two equally important uranium sources: The Jurassic rhyolites that are highly differentiated in the caldera and Hercynian rich uraninite-subbasin granite in the basement; the major uranium-bearing accessory minerals in the enriched uranium-bearing alkaline granites are variable at hydrothermal mineralization Raw amorphous minerals.