内蒙古乌兰毛都盆地铀成矿多源信息分析与远景预测

Multi-source Information Analysis and Prospect Prediction of Uranium Metallization in Wulanmaodu Basin,Inner Mongolia

乌兰毛都盆地是发育于古生界浅变质岩及花岗岩基底之上的中生代火山盆地,基底历经多期次强烈改造、成熟度高、富铀,中生代盖层具多旋回、多期次、岩相复杂多变、铀含量普遍较高等特征,铀成矿条件优越。通过分析区域铀成矿地质条件,对区域典型铀矿床(点)控矿因素及物化遥多源成矿信息进行剖析,系统梳理了区域多源铀矿找矿信息。类比邻区国外典型火山岩型铀矿床,对研究区航放、化探及遥感等找矿异常信息进行综合分析,认为乌兰毛都盆地具有较好的铀成矿潜力,预测成矿远景区4处,为进一步找矿勘查提供参考依据。

Wulanmaodu basin is a Mesozoic volcanic basin developed on Paleozoic shallow metamorphic rocks and granite basement.The basement has undergone multiple stages of intense transformation which result in high crustal maturity and rich uranium.The Mesozoic cap rock has experienced multiple sedmimetal cycles,lithofacies are complex and changeable,and the uranium content is generally high.The uranium metallogenic conditions are superior.By analyzing the regional uranium metallogenic geological conditions,the ore-controlling factors of the typical uranium deposits(occurrences)and the geophysical,geochemical and remote sensing information were analyzed.By systemically sorting out the prospecting information of regional mineralization and comparing to the similar volcanic uranium deposits in the neighboring area,a comprehensive analysis of prospecting anomaly information such as aerial release,geochemical exploration and remote sensing in the study area was conducted.It was believed that Wulanmaodu basin has good uranium metallogenic potential,and 4 prospects were predicted which provided a reference basis for further prospecting and exploration.