胶东金矿成矿花岗岩:“小岩体成大矿”理论的启示  

Ore-related Granites in Jiaodong Gold Deposits,China:Implications for the Theory of Small Intrusion Forming Large Deposit

作　　者：吕古贤[1] 杨立强[2] 焦建刚[3] 张宝林[4] 丁正江 周明岭 张亮亮 吕承训 LYU Gu-xian;YANG Li-qiang;JIAO Jian-gang;ZHANG Bao-lin;DING Zheng-jiang;ZHOU Ming-ling;ZHANG Liang-liang;LYU Cheng-xun(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;School of Earth Science and Resources,Chang'an University,Xi'an 710054,Shaanxi,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;No.6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources,Weihai 264209,Shandong,China;Development and Research Center,China Geological Survey,Beijing 100037,China)

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083 [3]长安大学地球科学与资源学院,陕西西安710054 [4]中国科学院地质与地球物理研究所,北京100029 [5]山东省地质矿产勘查开发局第六地质大队,山东威海264209 [6]中国地质调查局发展研究中心,北京100037

出　　处：《地球科学与环境学报》2023年第5期1026-1035,共10页Journal of Earth Sciences and Environment

基　　金：中国地质调查局项目(中地调[2017]00017);山东黄金矿业(玲珑)有限公司科研项目(LLYY-2019-001)。

摘　　要：胶东金矿集中区金成矿与中—酸性花岗岩类密切相关。剪切相的玲珑型似片麻状黑云母花岗岩(年龄为160~153 Ma)是面积达3500 km~2的大规模岩基;引张相的滦家河型等粒粗粒二长花岗岩(年龄为154~152 Ma)侵位于玲珑型似片麻状黑云母花岗岩内,单个岩体面积为100 km~2至数百平方千米。但与金成矿关系最密切的是挤压相的郭家岭型似斑状花岗闪长岩(年龄为131~126 Ma),多数呈岩株状出露(面积为2~90 km~2),超大型金矿床往往发育于距其5 km范围内。但是,当郭家岭型似斑状花岗闪长岩岩体规模很大(如蓬莱地区的郭家岭花岗闪长岩体面积为270 km~2)时,则与金成矿几乎无关。胶东中—酸性花岗岩“小岩体成大矿”的新认识对于中—酸性岩浆相关热液矿床的成矿规律研究和预测勘查均具有重大的理论意义和应用价值,但受限于相关资料缺乏广泛研究,其形成机制尚需深入探讨。The Jiaodong gold mineralization is closely related to intermediate-felsic granitoids.The Linglong-type gneissic biotite granite(the age is 160-153 Ma) being shear facies is a large batholith with an area of 3 500 km~2.The Luanjiahe-type equite-grained and coarse-grained monzogranite(the age is 154-152 Ma) being extension facies intrudes into the Linglong-type gneissic biotite granite,with a single area of 100 km~2 to hundreds square kilometer.But the most closely related to gold mineralization is the Guojialing-type porphyritic granodiorite(the age is 131-126 Ma) with compression facies,and it mainly exposes as stocks(the area is 2-90 km~2),which are close to giant gold deposits within 5 km.However,when the Guojialing-type porphyritic granodiorite has a large outcrop(such as the Guojialing granodiorite pluton in Penglai having an outcrop of 270 km~2),it is almost irrelevant to gold mineralization.The new cognition from the “small intrusion forming large deposit” of Jiaodong intermediate-felsic granite has great research significance and application value for the study on metallogenic regularity and mineral prospecting of intermediate-felsic magma-related hydrothermal deposits.But the relevant data still need to be extensively studied,and its genetic mechanism is being deeply explored.

关 键 词：成矿花岗岩 小岩体成大矿 构造岩相 岩基 岩株 胶东金矿 

分 类 号：P618.51[天文地球—矿床学]