摘要
东南地洼区是中国一个重要的铀矿化集中区（已探明的工业储量占全国总储量的２／３）。该区位于东亚壳体南段东邵，据其地质、地球物理化学场和铀矿化特征，以及地壳演化－运动历史的差异，划分为５个二级构造单元和４个铀成矿省。两者具有一定的对应性，即不同构造分区表现出一定的“成矿专属性”和找矿的重点铀矿化类型。矿床的形成和分布都受区域地壳演化规律的控制，尤其与地洼阶段的构造－岩浆活动密切相关。其中构造作用不只是被动地提供成矿的环境和场所，控制区域铀矿化的分布，还积极地参与成才作用的过程，制约着有关矿床的成因。对区内一些具有“岩源”和“层控”特征的多因复成铀矿床的形成起了至关重要的作用。
The Southeastern Diwa region is an important concentrated area of uranium mineraliza-tion in China.(The industrial reserves proved make up the two-thirds of the total reserves in the coun-try).The region is located in the east of the southern edge of east-Asia crust and classified into fivesecond-class tectonic units and four uranium metallogenetic provinces according to the features of itsgeology,geophysical-chemical field and uranium mineraliztion and the difference of crust evolution-movement history. Both fall into some correspondency each other,i.e.the different tectonic unit pos-sesses a definite metallogenetic exclusiveness and bears some important types of uranium mineralizationfor prospection. However,the formation and distribution of uranium deposits are controlled by the re-gional crustal evolution,especially associated with the tectonomagmatic activities at Diwa stage. Theenvironment and space for the emplacemant of ore bodies is not only passively supplied through tecton-ics which controll the distribution of regional uranium mineralization,but also participate the process oflmineralization and controll the genesis of the concerning mineral-deposits.They play a vital role in theformation of polygenetic comlpound uranium deposits which exhibit the characteristics of strata-boundand rock-source within the region.
出处
《华东地质学院学报》
1994年第2期101-105,共5页
Journal of East China Geological Institute
关键词
铀矿床
成矿作用
划分
成矿省
中国
southeastern diwa region
uranium metallogenetic province
polygenetic compound urani-um ore deposits
tectonic ore formation
