柴达木东北缘铀成矿地质条件及找矿远景研究

Uranium Forming Conditions and Exploration Prospect in the Northeast Margin of Qaidamu

研究区位于柴达木盆地北缘内生矿产成矿带东段。依据区域地质、构造演化和铀矿化特征,分析了构造-岩浆演化,主要含铀建造包括古元古代达肯大坂群、奥陶-志留系滩涧山群和上泥盆世牦牛山组,加里东、华力西和印支期岩浆活动,北西向断裂带控制地层、岩体及铀矿化展布等铀成矿条件,认为研究区铀矿化受含铀建造、北西向断裂带及华力西-印支期中酸性岩浆活动"三位一体"控制,进而探讨了柴达木东北缘铀矿找矿远景。

The northeast margin of Qaidamu Basin is situated in the east of endogenied mineral zone. Based on characteristic of regional geology, structural evolution as well as uranium mineralization, uranium metallogenic condition of structure-magma evolution is analyzed. The uranium construct includes the Paleo Proterozoic Dakend- aban group, Ordovician-Silurian Tanjianshan group and the upper Devonian Maoniushan group. The space distri- bution of stratum, magmatic rock and uranium mineralization is controlled by Magmatic activity of Caledonian, Variscan and Indo-Chinese epoch, NW fault belts. We consider that the uranium mineralization is a trinity inclu- ding uranium containing structure, faulted belt and intermediate-acid magmatic activities. Moreover, the explora- tion prospect of uranium mineralization is also discussed in this study.