【摘要】 浙西北晚侏罗世火山岩多为以安山—流纹岩为主的钙碱性系列岩石,它们隶属劳村组（J₃l）、黄尖组(J_?h)和寿昌组（J₃s）。本文对浙西北非产铀火山岩与中国东部产铀火山岩岩石化学特点的差异,对浙西北火山岩的含铀性即铀的分布、配分、活化转移进行了论述,并指出浙西北区的铀矿应多产在基底隆起带上的构造火山盆地或火山洼地内。更多还原

【Abstract】 The volcanic rocks of Late Jurassic in northwestern Zhejiang are a calc-alkaline volcanic series, their mainbodies being andesite-rhyolite, which belong to Laocun （J₃l）, Huangjian （J₃h） and Shouchang （J₃s） formations. However, the Rb-Sr isochron age obtained recently shows that it should belong to Cretaceous period. This paper deals in the difference of petrochemical composition between the non-Uranium-hosted volcanies in north-western Zhejiang and the Uranium-hosted volcanics in eastern China and the uranium-bearings of the volcanics, such as uranium abundance, distribution, activation and migration. It is pointed out that uranium ores in northwestern Zhejiang locate mainly in tectonic volcanic basins and/or volcanic rents above the upwarped district of basement.更多还原