Metallogenic Conditions and Prospecting Potential Analysis of Sandstone-type Uranium Deposit in Huahai Basin, Hexi Corridor
HE Feng1，LU Baolong 2，ZHANG Zilong1，NIU Ting2，HUO Zhida1，YANG Mengjia1，JIA Cui1
1.，CNNC Key Laboratory of Uranium Resource Exploration and Evaluation Technology，Beijing Research Institute of Uranium Geology Beijing 100029，China；2. Research Institute No.203， CNNC , Xianyang，Shaanxi 712000，China
Abstract： Study on the regional tectonic evolution of Hexi Corridor suggested that the uplift and denudation stage of Late Cretaceous-Paleocene is favorable for uranium mineralization and the northern slope zone is believed the favorable area in metallogenic structure for sandstone -type uranium deposits. The lower
Cretaceous Chijinpu Formation ， Xiagou Formation and Zhonggou Formation are preliminarily identified as the main ore-bearing target layers ， with alluvial fans ， fan deltas ， river deltas ， shore-shallow lakes and semi-deep lakes as the main sedimentary types. The Late Jurassic-Early Cretaceous Huahai Basin is a dustpan-shaped fault basin ， with fluvial delta facies mainly developed in gentle slope zone and alluvial fan and fan delta mainly developed in steep slope zone. The comprehensive analysis of metallogenic conditions showed that the northern slope zone of Huahai Basin has stable tectonic background ， abundant uranium source and favorable sand bodies ， rich in organic matter and hydrocarbon reductants ， and developed redox zones and soil radon anomaly zones ， which are good metallogenic conditions. It is considered that the overlapping area of favorable tectonic location ， favorable sand body and soil radon anomaly is the region with great potential for uranium mineralization. mineralization holes have been found for the first time in Huahai Basin which have proved that this area has good uranium metallogenic potential.
2019, Vol. 35 
