| 西南极利文斯顿岛含砾泥岩层的发现及其地质意义 |
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| 引用本文： | 邓希光,郑祥身,刘小汉.西南极利文斯顿岛含砾泥岩层的发现及其地质意义[J].极地研究,1999,11(3):169-178. |
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| 作者姓名： | 邓希光 郑祥身 刘小汉 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金，国家科委九五攻关项目，中国科学院资源与生态环境研究九五重大项目 |
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| 摘 要： | 西南极南设得兰群岛利文斯顿岛赫德半岛中分布的一套主要由复理石相岩石组成的低级变质沉积岩（迈尔斯陡崖组）被认为是中－ 新生代火山岩的基底（晚古生代－ 早中生代？）。以前含砾泥岩在迈尔斯陡崖组局部地点曾有零星报道，但详细的地质填图确认此地有四层含砾泥岩分布。研究表明，这些含砾泥岩可能是水下碎屑流沉积，其生成环境可能是海底扇中扇的水道。对比在南极半岛所发现有大量的含砾泥岩，则进一步表明利文斯顿岛早期地质特征可与南极半岛相比，两者在中－ 新生代岩浆弧形成之前处于相同的构造环境。
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| 关 键 词： | 含砾泥岩 赫德半岛 利文斯顿岛 西南极 地质意义 |
THE DISCOVERY AND GEOLOGICAL SIGNIFICANCE OF PEBBLY MUDSTONE IN THE MIERS BLUFF FORMATION IN LIVINGSTON ISLAND, WEST ANTARCTICA |
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| Deng Xiguang,Zheng Xiangshen,Liu Xiaohan.THE DISCOVERY AND GEOLOGICAL SIGNIFICANCE OF PEBBLY MUDSTONE IN THE MIERS BLUFF FORMATION IN LIVINGSTON ISLAND, WEST ANTARCTICA[J].Chinese Journal of Polar Research,1999,11(3):169-178. |
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| Authors: | Deng Xiguang Zheng Xiangshen Liu Xiaohan |
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| Abstract: | Livingston Island constains several
distinctive sedimentary and volcanic sequences, which document the history and evolution
of an important part of the South Shetland Islands magmatic arc. The sedimentary sequence
is named the Miers Bluff Formation (MBF) and is interpreted as turbidite since the first
geological study on South Shetland Islands. It base and top are not exposed, but a
thickness of more than 3000m has been suggested and seems plausible. The turbidite is
overlain by Mid-Cretaceous volcanic rocks and intruded by Eocene tonalites. The Miers
Bluff Formation and its correlatives, including Trinity Peninsula Group(TPG) in Graham
Land, Antarctic Peninsula and Greywacke-Shale Formation (GSF) in South Orkney Islands,
display the same lithology and tectonic style, share a common provenance and possibly the
same age, but the age is poorly constrained Late Carboniferous-Early Triassic. |
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| Keywords: | pebbly mudstone Miers Bluff Formation Livingston Island West Antarctica geological significance |
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