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基于CNN2D-LSTM的银多金属矿找矿预测方法研究——以大兴安岭乌尔吉地区为例

Research on Prospecting Prediction Method for Silver Polymetallic Deposits Based on CNN2D-LSTM ——— A Case Study of the Wu’erji Area in the Greater Khingan Mountains

  • 摘要: 人工智能技术在矿产勘查领域的应用正成为实现多源数据智能融合与高效找矿预测的前沿领域。通过提出融合二维卷积神经网络和长短期记忆网络的混合深度学习模型(CNN2D-LSTM),为应对传统方法在多源异构数据处理与地质信息深度利用方面的局限,实现地质、地球化学与地球物理数据的智能化深度融合。采用CNN2D分支高效提取断裂、岩性边界等空间分布特征,通过LSTM分支捕捉多期次热液活动的时序演化依赖,构建端到端的预测流程。在乌尔吉地区进行了找矿预测,结果表明,预测区面积占比仅为9.21 %,完整覆盖已知矿点,并据此确定3处成矿前景优越的找矿靶区。研究成果证实CNN2D-LSTM在复杂地质环境下具备优异的特征提取与时空规律建模能力,显著提升了矿产预测的精度与效率。

     

    Abstract: The application of artificial intelligence technology in mineral exploration is emerging as a cutting-edge field for achieving intelligent fusion of multi-source data and efficient prospecting prediction. By proposing a hybrid deep learning model integrating two-dimensional convolutional neural networks and long short-term memory networks (CNN2D-LSTM), this study addresses the limitations of traditional methods in processing multi-source heterogeneous data and deeply utilizing geological information, thereby enabling intelligent deep fusion of geological, geochemical, and geophysical data. The CNN2D branch efficiently extracts spatial distribution features such as faults and lithological boundaries, while the LSTM branch captures the temporal evolution dependencies of multi-stage hydrothermal activities, constructing an end-to-end prediction workflow. Prospecting prediction was conducted in the Wu’erji area. The results indicate that the predicted area accounts for only 9.21 % of the total area, yet it completely covers known mineral occurrences, and based on this, three prospecting targets with favorable metallogenic potential were delineated. The research findings confirm that CNN2D-LSTM possesses excellent feature extraction and spatiotemporal pattern modeling capabilities in complex geological settings, significantly enhancing the accuracy and efficiency of mineral prediction.

     

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