| 鄂尔多斯盆地西南缘彭阳铀矿地质特征、成矿规律及找矿标志 |
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| 关键词:Pengyang uranium deposit sandstone-type uranium deposits geological characteristics regularity of ore formation prospecting target |
| 基金项目:国家自然科学基金重点支持项目(编号: 92162212);国家重点研发计划项目(编号: 2018YFC0604200);中国地质调查局地质调查 项目(编号: DD20221678);国际地球科学计划项目(编号: IGCP675) |
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| 摘要: |
| Quantitative Gold Resources Prediction in Xiahe–Hezuo Area Based on Convolutional Auto-Encode Network |
| Pengyang uranium deposit is located in the southwest margin of Ordos Basin. It is the first large-scale sandstone type uranium deposit found in the aeolian sedimentary environment in the world. It has the characteristics of deep uranium bearing beds, thick sand bodies, and high uranium radioactivity. Based on the systematic study of the geological characteristics, material source, uranium source, occurrence state of uranium minerals, altered minerals, and the involvement of hydrocarbon fluids in the mineralization of Pengyang uranium deposit, the metallogenic regularity of Pengyang uranium deposit is systematically summarized in combination with previous research results. The study shows that the deep and large fractures, thick sand bodies and stable “mud-sand-mud” structure in the study area are very favorable for sandstone-type uranium mineralization. At the same time, the rock mass in the west of the basin can provide a stable uranium source, the shallow oxygenated uranium bearing fluid flows and penetrates along the layer, and the deep hydrocarbon fluid rises to the Luohe formation along the fault, leading to the fading and alteration of red sandstone and providing a reducing agent for uranium mineralization. During the Miocene to Pleistocene, tectonic activities triggered the coupling of oxygenated uranium bearing fluids and deep hydrocarbon bearing fluids, forming a complete fluid metallogenic system of “supplement-channel-discharge”, which ultimately led to uranium mineralization. Based on the analysis of the metallogenic factors and ore-controlling factors of Pengyang uranium deposit, a metallogenic model has been established, which is of great significance for the prospecting and research of sandstone type uranium deposits in the southwest margin of Ordos basin and similar geological conditions in other areas. |
| ZHANG Bo,MIAO Pei-sen,XIAO Ke-yan,LI Jian-guo,ZHAO Hua-lei,CHEN Yin,TANG Chao,SI Qing-hong,ZHU Qiang.2023.Quantitative Gold Resources Prediction in Xiahe–Hezuo Area Based on Convolutional Auto-Encode Network[J].Acta Geoscientica Sinica,44(5):897-908. |
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