摘要
通过分析二连盆地晚中生代以来的沉积构造演化,划分出早白垩世的大陆伸展断陷、断拗转换和晚白垩世以来弱挤压差异升降3个演化阶段。根据砂岩型铀矿成矿机理,认为断拗转换阶段沉积的灰色碎屑岩系是重要的找矿目的层,差异升降运动为砂岩型铀矿成矿提供了必要条件;分析了盆地中不同地段可能产出的铀矿化类型,初步归纳了铀的成矿模式。
Various mineral resources in a basin are associated with its tectono-sedimentary evolution. Based on the analysis of the tectono-sedimentary evolution of Erlian basin, three evolutional stages of Erlian basin are classified, they are： the continental extensional down-faulting stage, the transitional stage from down-faulting to down-warping in Early Cretaceous, and slightly compressioual differentiated uplifting-subsidence since Late Cretaceous. According to the mechanism of sandstone-hosted uranium metallogenesis it is suggested that the grey clastic rock series deposited at the stage of down-faulting down-warping transition must be the important target for uranium prospecting, and the differentiated uplifting-subsidence offers necessary conditions for sandstone-hosted uranium ore-formation. Then, types of uranium mineralization that could occur in Erlian basin are discussed, and uranium metallogenic model has been preliminarily summarized.
出处
《铀矿地质》
CAS
CSCD
2006年第2期76-82,共7页
Uranium Geology
关键词
二连盆地
构造-沉积演化
砂岩型铀矿
层间氧化
潜水氧化
成矿模式
Erlian basin
tectono-sedimentary evolution
sandstone-hosted uranium deposit
interlayeroxidation
phreatic oxidation
uranium metallogenic model
作者简介
卫三元（1960-），男，高级工程师，1984年毕业于桂林冶金地质学院。
