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基金项目:中国地质调查局国土资源大调查之基础调查类项目“山东1∶25万淄博市幅区调修测”(10101137001)、“华北重要经济区带资源与环境地质背景调查及数据更新”项目之子项目(200113000026)、“山东省矿产资源潜力评价”(1212010813014)
作者单位
刘书锋,邵艳琴,刘鑫冉,等 山东省第一地质矿产勘查院 
摘要:
      山东莱芜—淄博地区中生代燕山晚期岩浆活动强烈,形成了超基性-基性-中性-中偏碱性-酸性岩类侵入杂岩,并伴有碳酸岩脉、云母岩脉等超基性脉岩,与成矿密切相关的脉岩主要为中生代雪野序列岩体。该区NE、SN、NW向(包括NNW向)断裂发育,其中不乏分划性断裂,不仅将该区分割成凸起与凹陷相间分布的构造格局,同时控制了岩体、地层和矿产的分布,具有重要的控岩控矿性。莱芜—淄博地区位于鲁西华北板块稳定区,自中侏罗世开始,中国东部岩石圈快速减薄,地幔物质迅速隆升,沂沭断裂带剧烈活动,鲁西隆起开始复活,上地幔岩浆沿深大断裂附近的构造薄弱带上侵,流体多呈高碱性或酸性,富含常量及微量元素的幔源C-H-O流体对稀土元素的溶解度很高,在不断的循环运动中逐渐溶解稀土元素,即从围岩中萃取了成矿物质。断裂构造、岩体接触带构造及围岩的层间滑动带和层间破碎带等被活化,进而成为热流体运移之通道和场所,为成矿物质的进一步聚集提供了有利的储矿空间。构造为成矿流体的运移、富集提供了有利的通道和空间,流体运载的成矿物质在酸碱平衡打破后于有利构造部位沉淀富集成矿。该区中生代燕山晚期沂南序列岩体(碳酸岩脉、云母岩脉等)和磷、稀土等矿(化)体皆属幔源流体分异演化后不同阶段的产物。
关键词:中生代  雪野序列岩体  成矿  莱芜—淄博地区
Abstract:
      In Laiwu-Zibo area, the Late Yanshanian magmatic activity in the Mesozoci Era was strong, and the intrusive complex of ultrabasic-basic-neutral-moderately-alkalic-acid rocks was formed, accompanied by ultrabasic veins such as carbonate veins and mica veins. The veins closely related to mineralization are mainly Xueye Sequence rock mass of the Mesozoic. The NE, SN and NW-striking (including NNW) faults are developed in this area, among which there are not a few of dividing faults, which not only divide this area into a structural pattern of alternating distribution of bulges and depressions, but also obviously control the distribution of rock mass, strata and minerals, which is of importance to rock and ore-control. Laiwu-zibo area is located in the stable area of the North China plate in western Shandong. Since the middle Jurassic, the lithosphere in eastern China has been rapidly thinned, mantle material has been rapidly uplifted, the Yishu fault zone has been active violently, and the West Shandong uplift (i.e., Luxi uplift) has been regenerated. The upper mantle magma slowly intruded along the structural weak zone near the deep fault. Most of the fluids were highly alkaline or acidic. The mantle-derived C-H-O fluid, rich in major and trace elements, has a high solubility for rare earth elements, and many rare earth elements were gradually dissolved in the process of continuous circulation movement, that is, ore-forming materials were extracted from the surrounding rocks. The fault structure, rock mass contact zone structure, interlayer sliding zone and interlayer broken zone of surrounding rock were activated, which became the channel and place of thermal fluid migration, and provided a powerful ore storage space for the further accumulation of ore-forming materials. The structure provided a powerful channel and space for the migration and enrichment of ore-forming fluid. The fluid carried ore-forming materials, which precipitated in the favorable tectonic position after the acid-base balance was broken. The Yinan Sequence rock mass (carbonate veins, mica veins, etc.), phosphorus, rare earth, and other mineralized bodies in the Late Yanshanian period in this area are the products of different stages after the differentiation and evolution of mantle-derived fluid bodies.
Keywords:Mesozoic  Xueye Sequence rock mass  mineralization  Laiwu-Zibo area
刘书锋,邵艳琴,刘鑫冉,等.山东莱芜—淄博地区中生代雪野序列岩体成岩成矿机制[J].地质学刊,2022,46(4):335-350