| 鲁西新太古代洋板块地质及板块构造活动遗迹 |
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| 引用本文： | 陆松年,相振群.鲁西新太古代洋板块地质及板块构造活动遗迹[J].地球科学,2020,45(7):2279-2292. |
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| 作者姓名： | 陆松年 相振群 |
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| 作者单位： | 1.中国地质调查局天津地质调查中心, 天津 300170 |
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| 基金项目： | 中国地质调查局项目DD20190370泰山风景名胜区管理委员会项目SDGP370997202002000007 |
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| 摘 要： | 鲁西地区是我国新太古代经典的花岗岩-绿岩带出露地区之一，前人已积累了丰硕的构造地层、同位素地质年龄、地球化学及成矿作用等方面的资料，并对这一时期的地球动力学特征进行了讨论.通过研究“洋板块地质”的思路综合前人已获得的区域地质调查研究资料，表明泰山岩群镁铁质火山岩演化是一套由科马提岩-拉斑玄武岩和拉斑玄武岩、钙碱性玄武岩及安山岩等两类岩石组合复合而成的火山岩系，反映了相对早期形成与洋内地幔柱有关的科马提岩向相对晚期与弧有关的钙碱性玄武岩-安山岩的演化过程；新太古代初期形成岛弧型英云闪长岩带到新太古代中期形成分异型奥长花岗岩，则反映了俯冲过程中的花岗岩演化特点；新太古代晚期硅质高镁玄武岩（高镁玄武安山岩）的确定则是活动大陆边缘岩浆弧的产物；泰山岩群中红宝石（刚玉）的发现，进一步指示其形成的背景与新太古代板块构造俯冲作用有关，为鲁西存在新太古代洋板块地质遗迹提供了地质学证据.
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| 关 键 词： | 鲁西 新太古代 洋板块 板块构造 构造地质 |
| 收稿时间： | 2020-03-11 |
Tracing Archives of Ocean Plate Geology and Tracking Plate Tectonics from the Neoarchean Granite-Greenstone Belt of the Western Shandong Province |
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| Abstract: | The Luxi district which is located in West Shandong Province is one of the most representative granite-greenstone belts in the Neoarchean of China. Our pioneers have already accumulated rich sources related to tectonic lithostratigraphy, isotopic geochronology, geochemistry, mineralization, and etc. Some geologists also explores progressively the geodynamic features in this era. From the perspective of ocean plate geology, this article examines the previous data of regional geological investigation and research obtained by the predecessors, and shows that the mafic volcanic rocks of the Taishan Complex are composed of two rock associations, komatite-tholeiite and tholeiite-calc alkaline basalt-andesite, respectively. It reflects the evolution process from komatite related to mantle plume in the early stage to calc alkaline basalt-andesite related to arc in the late stage. From island arc type tonalite formed in the early stage of Neoarchean to differentiated trondhjemite formed in the middle stage of Neoarchean, it reflects the characteristics of granite evolution during subduction. The late Neoarchean Siliceous High Mg Basalt is the product of the active continental margin magma arc. The discovery of Ruby in the Taishan Complex further indicates that the setting of its formation is related to the subduction of Neoarchean plates. All these provide geological evidence for the existence of new Archean oceanic plate in Luxi District. |
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