| 论太行山构造岩浆带的岩浆来源及其成因 |
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| 引用本文： | 牛树银,董国润.论太行山构造岩浆带的岩浆来源及其成因[J].地质论评,1995,41(4):301-310. |
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| 作者姓名： | 牛树银 董国润 |
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| 作者单位： | 河北地质学院 石家庄
(牛树银，董国润)，河北地质学院 石家庄(许传诗) |
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| 基金项目： | 地质矿产部重点基础地质研究项目 (编号90006)，河北省地质矿产局科技发展项目资助 |
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| 摘 要： | 本文以太行山构造岩浆带及其东西两侧断陷盆地的地质特征及深部探测资料为依据，探讨远离俯冲板内构造岩浆带中岩浆的成因、来源及侵位机制。提出了韧性流变－岩浆隆起模式。认为在区域构造应力场和地幔位势差、密度差的控制下?隆升的造山带剥蚀物向两侧断陷盆地搬运，而中下地壳则沿深部向山根缓倾的韧性拆离带迁移到造山带的深部，并在拆离剪切作用及流体的参与下形成深熔岩浆，这种深熔岩浆，在沿陡倾剪切带上侵过程中，不断与中
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| 关 键 词： | 构造岩浆带 拆离流变带 物质迁移 岩浆 成因 |
THE ORIGIN AND SOURCE OF MAGMA IN THE TAIHANGSHAN TECTONO-MAGMATIC BELT |
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| Niu Shuyin,Dong Guorun and Xu Chuanshi.THE ORIGIN AND SOURCE OF MAGMA IN THE TAIHANGSHAN TECTONO-MAGMATIC BELT[J].Geological Review,1995,41(4):301-310. |
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| Authors: | Niu Shuyin Dong Guorun and Xu Chuanshi |
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| Abstract: | Based on the geologic features and geophysical data of the Taihangshan tectono-magmatic belt and the down-faulted basins on its east and west sides, the paper discusses the origin, source and emplacement mechanism of magmas in the intraplate tectono-magmatic belt far from the sub-duction zone, and proposes a tentative model of ductile rheomorphism and magma doming. Under the control of the regional tectonic stress field and mantle potential and density differences, materials denuded from the rising erogenic belt should be transported into the down-faulted basins on its two sides. The materials of the mid-lower crust of the basins might migrate toward the deep level of the orogenic belts along the gentle-dipping ductile detachment (deformed) belt at the deep mountain root and then would form anatectic magma under the shear stress due to detachment and in the presence of the fluids. The anatectic magma, which possibly rises along the steep dipping shear zone, continuously assimilates and contaminates country rocks of the mid-lower crust and even brings about partial melting, forming large-scale anatectic magma. Con-1 rolled by tectonism, the anatectic magma appears to be emplaced by means of dike propagation and balloning to the main decollment between the basement and the cover, thus forming the bulk of magmatic rocks in the tectono-magmatic belt. |
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| Keywords: | tectono-magmatic belt detachment-rheomorphic belt material migration Tai-hangshan |
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