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首页> 外文期刊>Journal of Asian earth sciences >Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data
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Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data

机译：印度支那及邻近地区的新元古代至早三叠世构造地层演化：综述新数据

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摘要

The Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas can be divided into six mega-episodes: (1) The Neoproterozoic-Early Cambrian mega-episode was characterized by shallow marine environment in the Sino-Vietnam composite terrane. Meanwhile, the different blocks of the Indochina composite terranes were still separated by branches of the Proto-Tethys. Sino-Vietnam and part of Indochina amalgamated along the Proto-Song Ma suture by the end of the Early Cambrian. (2) During the Middle Cambrian-Early Ordovician mega-episode, shallow shelf carbonate deposition prevailed north of the Proto-Song Ma suture with associated strata containing a rich benthic fauna. This contrasts with deep marine and volcanic arc setting in the south of the Proto-Song Ma suture. (3) The Middle Ordovician-Silurian mega-episode was characterized by subduction of the Tam Ky-Phuoc Son Ocean beneath the Viet-Lao terrane in the north and the Kon Tum terrane in the south. This was followed by a collisional orogeny that sutured the Kon Tum terrane with the Viet-Lao and Viet-Cambodia terranes along the Tam Ky-Phuoc Son suture. The hypothetic Po Ko and Chu Sinh sutures are discussed. The collision led to an intra-continental orogeny in the Sino-Vietnam composite terrane. By the end of the mega-episode, a unified Sino-Vietnam-Indochina super-terrane was established. During the latest Silurian-Early Devonian, benthic fauna and flora of the Sino-Vietnam and Indochina composite terranes shared Cathaysian affinity. (4) The Devonian-Toumaisian mega-episode was characterized by an Early-Middle Devonian transgression and a Late Devonian-Earliest Carboniferous regression, except for parts of northern Indochina where deep marine conditions remained. (5) During the Visean-Middle Permian, the Song Ma ocean reopenned in the north of Indochina. Meanwhile in the west, a volcano-plutonic belt formed due to eastward subduction of the Paleo-Tethys under the Indochina composite terrane. (6) The Late Permian-Early Triassic mega-episode was characterized by Emeishan mantle plume related continental rifting, and the Indosinian orogeny resulting from resuturing of the Indochina and Sino-Vietnam composite terranes along the Song Ma suture.
机译：印度支那及其邻区的新元古代至早三叠世构造地层演化可分为6个大片段：（1）中越复合地层中的浅海环境为新元古代-早寒武纪大片段。同时，印度支那复合地形的不同块仍然被原始特提斯的分支隔开。早寒武纪结束前，中越和印度支那部分地区沿原始宋马的缝合线合并。 （2）在中寒武纪—奥陶纪早期大集结期间，浅层碳酸盐岩沉积普遍存在于原始宋马缝合线以北，伴生的地层中含有丰富的底栖动物。这与原始松马缝合线南部的深海海洋和火山弧环境形成对比。 （3）中奥陶纪-lur陵纪大集的特征是俯冲了北部的Viet-Lao地壳之下的Tam Ky-Phuoc Son Ocean和南部的Kon Tum地壳。接着是碰撞造山作用，沿Tam Ky-Phuoc Son缝合线将Kon Tum地层与Viet-Lao和Viet-Cambodia地层缝合在一起。讨论了假想的Po Ko和Chu Sinh缝合线。碰撞导致了中越复合地层的陆内造山运动。大型剧集结束时，建立了一个统一的中越-印度支那超级地形。在最新的志留纪-早泥盆世时期，中越和印度支那的复合地层底栖动物和植物区系具有国泰亲和力。 （4）泥盆纪-陶马斯大集的特征是泥盆纪早-中海侵和泥盆纪-最早的石炭纪回归，但印度支那北部的部分地区仍保留着深海条件。 （5）在Visean-Middle Permian期间，印度支那北部重新开放了松马洋。同时，在西部，由于印度支那复合地形下古特提斯的东俯冲作用，形成了火山-火山成岩带。 （6）二叠纪-早三叠世晚期大集集的特征是峨眉山地幔柱相关的大陆裂谷作用，以及沿松马缝合线恢复印度支那和中越复合地层所致的印支期造山运动。

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  • 来源
    《Journal of Asian earth sciences》 |2020年第15期|104231.1-104231.23|共23页
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    Vietnam Union Geol Sci 6 Pham Ngu Lao Str Hanoi Vietnam;

    Univ Orleans Inst Sci Terre Orleans UMR 7327 CNRS Campus Geosci 1A Rue Ferollerie F-45071 Orleans 2 France;

    Hanoi Univ Sci Fac Geol VNU Hanoi Vietnam;

    Vietnam Petr Inst 167 Trung Kinh Str Hanoi Vietnam;

    Geol Survey Denmark Oster Voldgade 10 DK-1350 Copenhagen K Denmark|Greenland GEUS Oster Voldgade 10 DK-1350 Copenhagen K Denmark;

    Sorbonne Univ Inst Sci Terre Paris ISTeP UMR 7193 F-75252 Paris 5 France;

    Natl Museum Nat & Sci Dept Geol & Paleontol 4-1-1 Amakubo Tsukuba Ibaraki 3050005 Japan;

    Chulalongkorn Univ Fac Sci MESA RU Bangkok 10330 Thailand|Dept Mineral Resources King Rama 6 Rd Bangkok 10400 Thailand;

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  • 正文语种 eng
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  • 关键词

    Indochina composite terrane; Sino-Vietnam composite terrane; Paleozoic tectono-stratigraphy; Song Ma suture; Tam Ky-Phuoc Son suture;

    机译：印度支那复合地形中越复合地貌;古生代构造地层;松麻缝合;Tam Ky-Phuoc Son缝线;

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