二连盆地川井坳陷构造演化对砂岩型铀矿成矿作用的约束
投稿时间:2017-10-15  修订日期:2018-05-18  点此下载全文
引用本文:彭云彪.二连盆地川井坳陷构造演化对砂岩型铀矿成矿作用的约束[J].地质与勘探,2018,54(5):917-928
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作者单位E-mail
彭云彪 核工业二〇八大队内蒙古包头 304110991@qq.com 
基金项目:中国核工业地质局项目(编号:201602)资助成果
中文摘要:川井坳陷位于二连盆地西部,坳陷内目的层赛汉组上段发育辫状河、辫状河三角洲-湖沼沉积,砂体发育。受构造、构造演化影响,在坳陷东部发育晚白垩世苏海布龙剥蚀窗口,在坳陷西部白音查干地区发育古近纪剥蚀窗口,剥蚀窗口控制了后生含铀含氧流体向盆地内入渗参与成矿,找矿类型为赛汉期斜坡带型及古河谷型。东西二个剥蚀窗口的发现,对合理解释已发现的矿化异常、找矿预测模型的构建提供了基础。通过构建坳陷三位一体找矿预测模型,预测了苏海布龙、白音查干西及包龙凹陷东三个铀成矿远景区。
中文关键词:砂岩型铀矿 构造演化 找矿预测模型 川井坳陷 二连盆地
 
Constraints of tectonic evolution on sandstone-type uranium metallogenesis in the Chuanjin depression,Erlian basin
Abstract:The Chuanjin depression is located in the west of Erlian Basin where developed the upper member of Saihan Formation with sediments in braided rivers and braided river delta - lacustrine.Influenced by tectonic evolution, the late Cretaceous Suhaibulong and Paleogene Baiyinchagan erosion windowsformed in the east and west parts of the depression, respectively. These erosion windows controlled the uranium-bearing and oxygen-bearing fluid into the basin,which participated in the mineralization. The ore prospecting is of Saihan period slope type and paleovalley type.The discovery of the two erosion windows provides the basis for reasonable interpretation of the previously discovered mineralization anomalies and construction of the prediction model.By constructing three-in-one ore prediction model, this work forecasted three uranium mineralization areas, i.e. Suhaibulong, Baiyinchagan and Baolong.
keywords:sandstone uranium deposit,tectonic evolution, prospecting prediction model, Chuanjin depression,Erlian Basin
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