| 辽东半岛金矿成矿作用与深部资源勘查 |
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| 引用本文： | 刘建民,赵国春,徐刚,邱海成,李建锋,肖昌浩,沙德铭,刘福兴,毕广源,房兴,张家奇,郭祺,于婳.辽东半岛金矿成矿作用与深部资源勘查[J].吉林大学学报(地球科学版),2021,51(6):1613-1635. |
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| 作者姓名： | 刘建民 赵国春 徐刚 邱海成 李建锋 肖昌浩 沙德铭 刘福兴 毕广源 房兴 张家奇 郭祺 于婳 |
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| 作者单位： | 1. 中国地质科学院地质力学研究所动力成岩成矿实验室, 北京 100081;2. 自然资源部古地磁与古构造重建重点实验室, 北京 100081;3. 中国地质大学(北京)地球科学与资源学院, 北京 100083;4. 辽宁五龙黄金矿业有限责任公司, 辽宁 丹东 118012;5. 中国地质调查局沈阳地质调查中心, 沈阳 110034;6. 辽宁省有色地质局一○三队, 辽宁 丹东 118008 |
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| 基金项目： | 国家重点研发计划重点专项（2016YFC0600108，2018YFC0603802）；科技部国际合作专项（2014DFR21270）；中国地质科学院院长基金（JYYWF20180602） |
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| 摘 要： | 辽东半岛地处华北克拉通东北部、胶-辽台隆北段，是我国东部重要的金矿资源产区之一。区内先后发现五龙、白云、猫岭等大中型金矿床，探明储量超过300 t。鉴于辽东半岛与胶东半岛处于相似的构造背景，辽东半岛金矿成矿及找矿潜力一直广受关注，相关的地质研究及矿产勘查工作也持续进行。总体看，已有研究更多聚焦于金矿床本身的描述及矿床成因等方面的工作，但缺乏对区域成矿背景及成矿过程的全面梳理，在一定程度上制约了深部资源勘查工作的方向及部署。作者根据2016-2019年间的野外地质调查，结合区域成矿地质背景、含矿岩石显微构造变形和年代学等方面的分析，系统总结了辽东半岛金矿的成矿条件和控矿因素，并就深部资源勘查方向提出了建议。研究表明：辽东半岛已发现金矿化分属于晚三叠世和早白垩世两期构造-岩浆成矿系统。宏观及微观上，构造对区内金矿的形成和分布均表现出明显的控制作用。两个时期的金矿都经历了早期的韧性变形和晚期的脆性变形，且金矿化都与晚期脆性构造环境下发育的超碎裂岩化及含矿热液蚀变作用有关。基于辽东半岛地壳结构、物质组成和金矿成矿地质条件的分析，本文认为辽东半岛的深部资源勘查应重点集中在3个方向：营口-宽甸台拱的南、北边界断裂带及其伴随的北东、北西向断裂构造的复合部位；营口-宽甸台拱的东、西两侧北东向（新华夏系）边界断裂带及其伴随的低级别、低序次构造系统；关注在现有含矿构造带下部是否存在与印支期、燕山期岩浆活动有关的斑岩型金矿化（床）。
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| 关 键 词： | 金矿成矿作用 构造变形对金矿的控制 成矿年代学 深部资源勘查 辽东半岛 |
| 收稿时间： | 2020-11-03 |
Metallogenesis of Gold Deposits and Deep Exploration in Liaodong Peninsula |
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| Liu Jianmin,Zhao Guochun,Xu Gang,Qiu Haicheng,Li Jianfeng,Xiao Changhao,Sha Deming,Liu Fuxing,Bi Guangyuan,Fang Xing,Zhang Jiaqi,Guo Qi,Yu Hua.Metallogenesis of Gold Deposits and Deep Exploration in Liaodong Peninsula[J].Journal of Jilin Unviersity:Earth Science Edition,2021,51(6):1613-1635. |
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| Authors: | Liu Jianmin Zhao Guochun Xu Gang Qiu Haicheng Li Jianfeng Xiao Changhao Sha Deming Liu Fuxing Bi Guangyuan Fang Xing Zhang Jiaqi Guo Qi Yu Hua |
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| Abstract: | Located in the northeast of North China craton and the northern part of Jiao-Liao uplift, Liaodong Peninsula is one of the important gold resource producing areas in East China, where several large and medium sized gold deposits are developed including those occurred in Wulong, Baiyun, and Maoling areas with proven reserves up to more than 300 t. Because of the similarity of the geological and tectonic settings between Jiaodong Peninsula and Liaodong Peninsula, the gold mineralization and prospecting potential in Liaodong Peninsula has received attention, and the research on the mineralization settings and typical gold deposits has been going on. However, the lack of a systematic understanding of the relationship between the regional metallogenic geological settings and mineralization process restricts the deployment of deep resource exploration. Based on the investigation over the years of 2016-2019 on the geology and geochronology of the gold deposits, as well as the comprehensive analysis of the microstructural deformation and geochronology of the ore-related rocks, we discussed the ore-forming geological conditions of the gold deposits in Liaodong Peninsula. The results show that the discovered gold deposits in Liaodong Peninsula may be related to the two episodes of tectono-magmatic-ore forming systems in the Late Triassic and Early Cretaceous. The two kinds of gold mineralization are controlled by different structural patterns, macro-and microscopically. The gold ores are mainly formed under the brittle or brittle-shear deformation conditions with the extensive occurrences of ore-bearing clastic flows, caused by both a repetitive sequence of brittle or brittle-shear failure along the major fault systems and the related magmatic hydrothermal activities in the Late Triassic and Early Cretaceous. This genetic origin of the gold mineralization and ore-bearing clastic flows may support the idea of flashing vaporization by earthquakes in the mesothermal gold-bearing systems. We suggest that the exploration of the deep resources should target three regions:The north and south boundary fault zones of the Yingkou-Kuandian uplift and the structural composite sites between the north and south boundary fault zones and the accompanying NE or NW-trending fault zones;The main NE-trending fault zones and the accompanying lower or secondary structural systems along the east and west boundary of the Yingkou-Kuandian uplift; deep in the existing ore-bearing structural belt,where it is necessary to pay attention to the existence of porphyry-type gold mineralization (deposit) which is related to the magmatic activities of Indosinian and Yanshanian periods. |
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| Keywords: | metallogenisis of gold deposits structural control on gold mineralization chronology for ore-forming exploration for the deep resources Liaodong Peninsula |
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