| 阿尔泰大型剪切弧形推覆构造系及其应变恢复 |
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| 引用本文： | 曲国胜,张进江.阿尔泰大型剪切弧形推覆构造系及其应变恢复[J].现代地质,1992,6(2):188-200. |
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| 作者姓名： | 曲国胜 张进江 |
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| 作者单位： | 国家地震局地质研究所
(曲国胜)，铁路航测与遥感科技情报中心(张进江) |
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| 基金项目： | 新疆305项目资助课题 |
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| 摘 要： | 海西中晚期阿尔泰造山带中发育了一系列剪切弧形推覆构造系,平面上呈弧形,剖面上呈叠瓦状背驮式由北东向南西斜—逆冲,其成因是斜向的壳内叠积及受早期类拗拉谷楔形构造和斜—逆冲下盘边界的联合影响,喜马拉雅期推覆系重新复活。应变恢复表明现长为50Km的剖面其原长最小为266.7Km,最小缩短量为216.7Km,海西早期类拗拉谷的最小宽度为170Km,应变恢复结果与斜—逆冲模式一致。
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| 关 键 词： | 阿尔泰造山带 剪切弧形推覆构造系 斜—逆冲叠积 边界效应 应变恢复 |
THE LARGE SHEAR ARC-SHAPED THRUST SYSTEMS AND THEIR STRAIN RECONSTRUCTION IN THE ALTAY MOUNTAINS |
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| Qu Guosheng Zhang Jinjiang.THE LARGE SHEAR ARC-SHAPED THRUST SYSTEMS AND THEIR STRAIN RECONSTRUCTION IN THE ALTAY MOUNTAINS[J].Geoscience——Journal of Graduate School,China University of Geosciences,1992,6(2):188-200. |
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| Authors: | Qu Guosheng Zhang Jinjiang |
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| Institution: | Qu Guosheng Zhang Jinjiang
(Institute of Geology. State Seismological Bureau ) (Information and Management Center of Railway Aerial Surveying and Remote Sensing Technique ) |
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| Abstract: | A series of oblique-thrusting sheets and listric-type faults dispersed to the northwest
and converged to the southeast consist of the shear are-shaped thrust systems in the Chi-
nese, Kazakstan and Mongolia Altay mountains, which were defined by the detailed stud-
ies of criteria in geometry, kinematics, stratigraphy, structures, isotopic chronology and
metamorphism, One may conclude that the most probable interpretation of the systems is
that they are the product of oblique thrusting and crustal repetitions with piggy-back se-
quences from NE to SW affected by earlier aulacogen-like wedge structures and the bound-
ary structures of the thrusting footwalls. The intense compression and orogeny of the Al-
tay mountains in the middle to late Hercynian resulted in the generation of shear-arc type
thrust systems and related metamorphism and magmatism. This systems reacted along
some main faults during the Mz-Kz periods. The reconstruction of the shear and com-
pressing strains indicate that the smallest original length of the Sarbulak - Kuwey cross-
section is 266. 7km and the present length is 50km. |
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| Keywords: | Altay mountains the shear arc-shaped thrust systems oblique thrustingand repetition edge effect strain reconstruction |
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