摘要
我国重要矿产资源严重短缺,深部找矿成为解决资源危机的必然选择,深部矿产资源预测则是深部找矿的前提和基础。然而,深部矿床埋藏深度大,主要根据地表物化遥和地质信息进行成矿预测的常规方法已不适用于深部成矿预测,三维成矿预测是解决深部找矿靶区圈定难题的关键方法。胶东是具有世界影响的金成矿区,深部找矿成果和勘探深度位居国内前列,对其进行三维成矿预测具备得天独厚的条件,对于推动我国深部找矿具有重要的示范作用。简要介绍了胶东三维成矿预测的方法、依据和预测结果。主要采用地质和地球物理相结合的方法建立了胶东区域三维地质模型,采用钻探与地球物理相结合的方法建立了主要金矿床集中区的三维地质模型。根据三维空间上的金矿断裂控矿规律,提出了基于阶梯成矿模式、重点根据断裂倾角梯变和缓倾角段控矿规律的深部找矿靶区预测方法和基于控矿断裂浅部资源量的深部金矿资源潜力预测方法。根据胶东区域三维地质模型和深部地球物理探测结果,圈定了3处找矿新靶区;根据金矿床集中区三维地质模型,提取了断裂缓冲区、断裂倾角、断裂表面变化率、矿体等间距分布等特征变量,在焦家断裂和三山岛断裂圈定了5处深部找矿靶区;根据三山岛、焦家、招平3条控矿断裂-2 000 m标高以浅已探明的金资源量,预测三者-2 000~-5 000 m深度金资源量达到3 377~6 490 t,认为胶东金资源总量有望超过万吨目标。新的预测成果,揭示了胶东地区令人振奋的深部金矿资源潜力,为进一步开展深部找矿奠定了基础。
Due to the serious shortage of important mineral resources in China,deep prospecting has become the inevitable choice to solve the resource crisis,and the prediction of deep mineral resources is the premise and foundation of deep prospecting. However,the conventional method of metallogenic prediction is no longer suitable for deep metallogenic prediction. So 3D metallogenic prediction is the key method to solve the problem of deep prospecting target delineation. Jiaodong Peninsula is one of the most influential metallogenic areas in the world,and its deep prospecting achievements and exploration depth rank the top in China. Therefore,it has unique conditions for 3D metallogenic prediction in Jiaodong Peninsula,and which plays an important demonstration role in promoting deep prospecting in China. This paper briefly introduces the method,basis and result of 3D metallogenic prediction in Jiaodong Peninsula. The 3D geological model of Jiaodong Peninsula is established by combining geological and geophysical methods,and the 3D geological models of main gold deposits concentration area are established by combining drilling and geophysical methods. According to the tectonic ore control regularity in 3D space,the prediction method of deep prospecting target area based on the step metallogenic model,and the prediction method of deep gold resource potential based on the amount of shallow ore-controlling faults were put forward. According to the 3D geological model of Jiaodong Peninsula and deep geophysical exploration,three new prospecting targets are delineated. According to the 3D geological models of the gold deposits concentration area,the characteristic variables such as fault buffer zone,fault dip angle,fault surface change rate,and equal spacing distribution of ore body were extracted,and five deep prospecting target areas were delineated in Jiaojia fault and Sanshandao fault. According to the proven gold resources at the 0~-2 000 m elevation of the three orecontrolling faults in Sanshandao,Jiaojia and Zhaoping,the gold resources at the depth of -2 000~-5 000 m are estimated to be 3 377~ 6 490 t. It is believed that the total gold resources in Jiaodong Peninsula are expected to exceed the target of ten thousand tons. The new prediction results reveal the exciting deep gold resource potential in Jiaodong Peninsula,which lays a foundation for further deep ore prospecting.
作者
宋明春
周明岭
鲍中义
温桂军
李世勇
范家盟
杨真亮
贺春艳
高美霞
王洪军
王永庆
李瑞翔
SONG Mingchun;ZHOU Mingling;BAO Zhongyi;WEN Guijun;LI Shiyong;FAN Jiameng;YANG Zhenliang;HE Chunyan;GAO Meixia;WANG Hongjun;WANG Yongqing;LI Ruixiang(Hebei Province Collaborative Innovation Center for Strategic Critical Mineral Research,Hebei GEO University,Shijiazhuang 050031,China;Shandong Provincial No.6 Exploration Institute of Geology and Mineral Resources,Weihai 264209,China;Shandong Provincial Nuclear Industry Geological Group 273,Yantai 264006,China;Shandong Institute of Geophysical and Geochemical Exploration,Jinan 250013,China;Shandong Provincial No.4 Exploration Institute of Geology and Mineral Resources,Weifang 261021,China)
出处
《金属矿山》
CAS
北大核心
2023年第1期246-258,共13页
Metal Mine
基金
国家自然科学基金项目NSFC—山东联合基金项目(编号:U2006201)。
关键词
三维成矿预测
深部金矿
断裂倾角梯变控矿
资源潜力
找矿靶区
胶东
3D metallogenic prediction
deep gold deposits
mineralization controlled by fracture
prospecting target areas
resource potential
Jiaodong Peninsula
