摘要
招平断裂带是胶东三大千吨级金成矿带之一。该断裂带中段的焦格庄—夏甸一带主要矿床的探矿深度已达2 km,其深部及外围仍有较大的找矿空间。为了详细掌握该区域的找矿前景,为新一轮找矿突破战略行动提供基础依据,采用平面地质图、图切地质剖面和探矿工程数据,结合重磁电三维物性反演,利用人机交互式建模技术,建立了-4000 m以浅三维地质体模型。通过对三维地质模型进行空间分析发现,控矿断裂由浅部至深部呈倾角陡、缓交替的阶梯式变化,在断裂倾角陡、缓转折段和倾角较缓段,金矿化富集程度高,金矿体具有向NE侧伏和等间距分布规律。基于构造走向转折地段、构造倾角转折部位、构造表面变化率、矿体倾向等间距性和矿体侧伏5个特征变量建立了招平断裂带中段综合找矿预测模型,圈定深部找矿靶区12处。将5个特征变量叠加的信息量值作为关联要素,预测金潜在矿产资源为416 t。经对靶区进行初步钻探验证,发现了工业矿体,实现了招平断裂带中段新的找矿突破。
The Zhaoping fault zone represents one of the three principal gold ore belts,each containing substantial reserves exceeding one thousand tons,within the Jiaodong region.Exploration efforts in the Jiaogezhuang-Xiadian area have reached depths of up to 2 kilometers,indicating significant potential for further exploration in both the deeper sections and the surrounding periphery of this zone.Nonetheless,several challenges hinder mineral exploration in these deeper peripheral areas,including a lack of clarity regarding metallogenic patterns,inadequate signal reception from conventional geophysical methods under,substantial overburden,and the complexities associated with managing extensive datasets generated from deep mining operations.Through the analysis of geological maps,exploration line profiles,and exploration data,alongside the implementation of three-dimensional physical inversion techniques for gravity,magnetic,and electrical properties,a comprehensive understanding of the exploration prospects in the area has been attained.This research provides a foundational basis for advancing exploration strategies in forthcoming initiatives.The threedimensional geological model was developed by using human-computer interaction modeling technology,it extending from the surface to a depth of-4000 meters.Spatial analysis of the three-dimensional geological model reveals a pattern of ore-controlling faults with varying angles from the shallow to the deeper sections.It is found that the gold mineralisation is highly enriched in the section of steep and slow dip faults and in the section of slow dip faults,and the gold ore body follows the law of lateral volatility and equidistant distribution to the NE.This study introduces a prospecting methodology informed by the principles of“fault ore control law”combined with a detailed three-dimensional geological model.It identifies regions with anomalous structural morphology as favorable zones for mineralization,thereby addressing the challenge of detecting abnormal ore deposits
作者
薛欢欢
杨真亮
宋明春
徐明璞
李军鹏
宋林君
刘天鹏
刘雪婷
张腾
王鲁艳
XUE Huanhuan;YANG Zhenliang;SONG Mingchun;XU Mingpu;LI Junpeng;SONG Linjun;LIU Tianpeng;LIU Xueting;ZHANG Teng;WANG Luyan(Shandong Engineering Research Center of Application and Development of Big Data for Deep Gold Exploration,Ministry of Natural Resources Technology Innovation Center for Deep Gold Resources Exploration and Mining,No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources(No.6 Institute of Geology and Mineral Resources Exploration of Shandong Province),Weihai 264209,Shandong,China;Hebei Key Laboratory of Strategic Critical Mineral Resources,College of Earth Sciences,Hebei GEO University,Shijiazhuang 050031,Hebei,China)
出处
《黄金科学技术》
CSCD
北大核心
2024年第6期977-989,共13页
Gold Science and Technology
基金
国家自然科学基金NSFC-山东联合基金项目“胶东深部金矿断裂控矿机理”(编号:U2006201)
山东省重点研发计划(重大科技创新工程)“金属深部协同探测技术装备”(编号:2023CXGC011001)
省财政资金项目“透视山东—焦家—三山岛金成矿带三维地质精细化模型建设与找矿预测”(编号:鲁勘字(2022)51号)
山东省地质矿产勘查开发局项目“招平断裂带中段深部金矿资源潜力调查”(编号:KC202210)联合资助。
关键词
三维地质模型
深部成矿预测
大数据
靶区圈定
招平断裂带
three-dimensional geological model
deep mineralization prediction
big data
target area delineation
Zhaoping fault zone
