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二连盆地晚中生代以来构造-沉积演化与铀成矿作用
引用本文:卫三元,秦明宽,李月湘,何中波,陈安平,申科锋,曹建英.二连盆地晚中生代以来构造-沉积演化与铀成矿作用[J].铀矿地质,2006,22(2):76-82.
作者姓名:卫三元  秦明宽  李月湘  何中波  陈安平  申科锋  曹建英
作者单位:1. 核工业北京地质研究院,北京,100029
2. 核工业地质局208大队,内蒙古,包头,014010
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。

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
文章编号:1000-0658(2006)02-0076-06
收稿时间:05 9 2005 12:00AM
修稿时间:2005年5月9日

Tectono-sedimentary evolution of Erlian basin since Late Mesozoic and sandstone-hosted uranium metallogenesis
WEI San-yuan,QIN Ming-kuan,LI Yue-xiang,HE Zhong-bo,CHEN An-ping,SHEN Ke-feng,CAO Jian-ying.Tectono-sedimentary evolution of Erlian basin since Late Mesozoic and sandstone-hosted uranium metallogenesis[J].Uranium Geology,2006,22(2):76-82.
Authors:WEI San-yuan  QIN Ming-kuan  LI Yue-xiang  HE Zhong-bo  CHEN An-ping  SHEN Ke-feng  CAO Jian-ying
Institution:1. Beijing Research Institute of Uranium Geology, Beijing 100029, China; 2. Geologic Party No, 208, CNNC, Baotou, InnerMongolia 014010, China
Abstract: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.
Keywords:Erlian basin  tectono-sedimentary evolution  sandstone-hosted uranium deposit  interlayer oxidation  phreatic oxidation  uranium metallogenic model
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