融合成矿过程数值模拟信息的三维成矿预测方法研究:以安徽宣城茶亭地区为例  

Research on three-dimensional mineral prospectivity modeling by integrating numerical simulation of the ore-forming process:A case study in the Chating area of Xuancheng,Anhui Province,China

作　　者：谢先岗 李晓晖[1] 袁峰[1] 叶胜飞 陈宇恒 XIE Xian-gang;LI Xiao-hui;YUAN Feng;YE Sheng-fei;CHEN Yu-heng(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009

出　　处：《矿物岩石地球化学通报》2024年第2期446-458,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(42072321,42230802);安徽省公益性地质工作项目(2021-g-2-12)。

摘　　要：茶亭地区位于长江中下游成矿带南陵-宣城矿集区东北部,近年来陆续发现了多个斑岩型和矽卡岩型矿床,显示深部具有很好的热液矿床成矿潜力。目前传统的矿产勘查方法对区内隐伏矿的勘查效果不佳,制约了进一步的找矿突破。三维成矿预测是近年来隐伏矿找矿的重要手段之一,但三维预测信息的缺乏在一定程度上制约了该方法的预测效果。三维成矿过程数值模拟方法能为三维成矿预测方法提供新的预测信息,但对多元数值模拟信息的联合应用以及对三维成矿预测方法的支持能力等均有待深入研究。本文以安徽宣城茶亭地区为例,在力-热-流多场耦合的条件下对热液成矿过程进行三维数值模拟;通过将体应变增量、剪切应变增量等数值模拟变量信息与其他预测信息进行融合,实现深部找矿靶区的圈定。结果显示,成矿过程数值模拟方法可为三维成矿预测提供有效的预测信息,能显著提高预测能力;圈定的找矿靶区可为进一步的深部找矿勘查提供更为有效和可靠的线索和方向。The Chating area is situated in the northeastern part of the Nanling-Xuancheng ore cluster,within the middle-lower Yangtze River mineralization belt.Several porphyry and skarn-type deposits have been newly discovered in this region,indicating the significant epithermal ore-forming potential in the deep subsurface of the area.However,the traditional mineral exploration methods currently being carried out have limited capabilities for exploring deep-seated concealed ore deposits within the area,which hinders further mineral discoveries.In recent years,three-dimensional ore prediction has emerged as a crucial tool for predicting concealed ore deposits in the deep subsurface.However,the lack of three-dimensional predictive information remains a bottleneck restricting its forecasting capabilities.Current research indicates that three-dimensional numerical simulation methods of ore-forming processes can offer new three-dimensional predictive information for mineralization prediction.However,the application of multivariable numerical simulation information and its support for three-dimensional mineral prospectivity modeling require further research.This study using the Chating area in Xuancheng,Anhui province as a case study,employs a three-dimensional geological model and conducts three-dimensional numerical simulations of the hydrothermal mineralization process coupled with stress-heatflow fields.By integrating numerical simulation variables such as volume strain increments and shear strain increments with other predictive information,this study successfully delineated prospective deep-seated exploration targets.The results of this research demonstrate that the numerical simulation of ore-forming processes can provide valuable predictive information for threedimensional mineral prospectivity modeling,significantly enhancing its predictive capabilities.In addition,the delineated target areas may offer more effective and reliable directions for further deep mineral exploration in this area.

关 键 词：三维 成矿预测 成矿过程数值模拟 茶亭地区 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P641[天文地球—测绘科学与技术]