| 董方升,张化南,张成勇,魏恋欢,吕东霖,王生文,张松,王潇.平庄盆地五十家子地段铀成矿作用及找矿方向[J].矿产勘查,2026,17(6):986-996 |
| 平庄盆地五十家子地段铀成矿作用及找矿方向 |
| Uranium mineralization and prospecting direction in the Wushijiazi Area, Pingzhuang Basin |
| 投稿时间：2024-12-09 |
| DOI：10.20008/j.kckc.202606005 |
| 中文关键词: 砂岩型铀矿 铀成矿作用 找矿方向 平庄盆地 五十家子地段 |
| 英文关键词: sandstone-type uranium deposit uranium mineralization prospecting direction Pingzhuang Ba-sin Wushijiazi Area |
| 基金项目:本文受辽宁省级地质勘查项目(JH22-210000-15694和JH20-210000-05760)联合资助。 |
|
| 摘要点击次数: 3 |
| 全文下载次数: 0 |
| 中文摘要: |
| 平庄盆地是晚中生代断陷盆地，紧邻松辽盆地砂岩型铀矿成矿区和沽源—红山子火山岩型成矿带。前人在该盆地北部五十家子地段白垩系孙家湾组发现了 3层铀矿化体，但仍缺乏对该地区铀成矿作用的深入研究，限制了该地区找矿。本文通过对 3个矿层的样品进行镜下鉴定、黏土矿物、电子探针和扫描电镜等分析，发现 3个矿层铀成矿作用上具有共性的同时，在成矿环境及富集方式等方面具有一定差异，结果显示该区铀成矿为潜水氧化及层间氧化作用叠加成矿，成矿阶段分为晚白垩世中期原生沉积预富集阶段、晚白垩世晚期—上新世早期后生氧化作用阶段、上新世晚期保矿阶段，显示出较大的成矿潜力，并提出了该区的找矿方向。 |
| 英文摘要: |
| The Pingzhuang Basin is a graben basin of Late Mesozoic, and it is close to sandstone-type uraniummineralization area in the Songliao Basin and Guyuan-Hongshanzi uranium metallogenic belt. Previous researchersdiscovered three layers of uranium ore bodies in Sunjiaw Formation of Cretaceous at the Wujiazi area, which is atthe northern part of the Pingzhuang Basin, however, in-depth studies about uranium mineralization of this deposit isstill lacking, which restricted the prospecting in this area. In this study, we found that the uranium mineralization ofthe three layers of uranium ore bodies was common, but there were some differences in metallogenic environmentand enrichment mode, by analyzing the samples of three layers of uranium ore bodies, include microscopic identifi-cation, clay minerals, electron probes and scanning electron microscope. The results show that the uranium mineral-ization in this area is the superposition model of phreatic oxidation and interlayer oxidation, and the mineralizationstages are divided into the pre-enrichment stage of primary sediments in the middle of Late Cretaceous, the post-oxidation stage from Late Cretaceous to Early Pliocene, and the ore preservation stage in the Late Pliocene, whichshows great potential for uranium mineralization, furthermore, we put forward the prospecting direction in this area. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|