鲁西金刚石原生矿近十年深部成矿预测  

Deep Metallogenic Prediction of a Primary Diamond Deposit in Recent Ten Years in Western Shandong Province

作　　者：冯爱平 刘传朋 褚志远 夏立献 肖丙建 李新凤 徐磊磊 赵秀芳 FENG Ai-ping;LIU Chuan-peng;CHU Zhi-yuan;XIA Li-xian;XIAO Bing-jian;LI Xin-feng;XU Lei-lei;ZHAO Xiu-fang(The 7th Institute of Geology&Mineral Exploration of Shandong Province,Linyi,Shandong 276006;Key Laboratory of Diamond Mineralization Mechanism and Exploration,Shandong Provincial Bureau of Geology&Mineral Resources,Linyi,Shandong 276006;Academician Workstation of Diamond Mineralization Mechanism and Exploration in Shandong Province,Linyi,Shandong 276006)

机构地区：[1]山东省第七地质矿产勘查院,山东临沂276006 [2]山东省地质矿产勘查开发局金刚石成矿机理与探测重点实验室,山东临沂276006 [3]山东省金刚石成矿机理与探测院士工作站,山东临沂276006

出　　处：《地球学报》2021年第6期881-894,共14页Acta Geoscientica Sinica

基　　金：山东省地质调查院矿产资源潜力评价专项(编号:1212010813014);山东省地质矿产勘查开发局地质科技攻关项目(编号:KY201602);山东省地质矿产勘查开发局2020年度局控地质勘查与科技创新项目(编号:202011;202012)联合资助;山东省科学技术厅重大科技创新工程(编号:2017CXGC1607)。

摘　　要：山东近十年为实现金刚石找矿新突破,针对鲁西金刚石原生矿"攻深扫盲",开展了基于不同技术方法的深部成矿预测,主要包括:金刚石资源量定量预测(1600m以浅),可控源大地电磁测深法(CSAMT)反演预测(1000 m以浅),基于重力、大地电磁测深、反射地震综合物理方法反演预测(4 km以浅),基于断裂构造特征分析对已知矿体深边部三维定位定量预测。本文系统阐述各深部预测的技术方法、参数选择、技术路线等,评价各预测方法的实际效果,提出将地球物理、地质钻孔、地质剖面等多元地质信息有效融合进行三维综合信息成矿预测的思路,以进一步提高深部成矿预测的有效性和可靠性,总结了鲁西金刚石矿田由浅至深关于岩性、金刚石粒度及规模形态的变化规律,为今后金刚石找矿及预测工作中有效判别金伯利岩筒的"相带"部位、规模形态及含矿性提供经验积累,助力金刚石找矿及预测实现新突破。In recent ten years, in order to achieve a new breakthrough in diamond prospecting, Shandong Province has conducted deep metallogenic prediction based on different technical methods, aiming at the “Fight against illiteracy in depth” of primary diamond deposits in western Shandong Province. It mainly includes, the quantitative prediction of diamond resources in the depth of shallower than 1600 m, the inversion prediction of CSAMT(at depths shallower than 1000 m), the inversion prediction based on comprehensive physical methods of gravity, MT and reflection seismic(at depths shallower than 4 km), and 3D positioning and quantitative prediction of depth and extent of known orebodies based on the analysis of fault structure characteristics.This paper systematically describes the technical methods, parameter selection, and technical route of each deep prediction, and evaluates the actual effect of each prediction method. In order to further improve the effectiveness and reliability of deep metallogenic prediction, the idea of three-dimensional comprehensive information metallogenic prediction based on the effective fusion of geophysical, geological drilling, geological section and other geological information is proposed. In addition, the change law of lithology, diamond grain size, and scale form from shallow to deep is summarized for the diamond field in western Shandong Province. These results provide a basis for the effective discrimination of “facies zone” position, scale, shape, and ore bearing property of kimberlite tubes in diamond prospecting and prediction in the future, and help realize a new breakthrough in diamond deep prospecting and prediction.

关 键 词：金刚石原生矿 深部成矿 地球物理探测 三维定量预测 鲁西 

分 类 号：P631[天文地球—地质矿产勘探]