| 藏南江孜盆地晚侏罗至早白垩世重力流沉积 |
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| 引用本文： | 彭勇民,李金高,姚鹏.藏南江孜盆地晚侏罗至早白垩世重力流沉积[J].古地理学报,2000,2(3):37-44. |
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| 作者姓名： | 彭勇民 李金高 姚鹏 |
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| 作者单位： | 1.中国矿业大学; 徐州221008;
2.西藏地质矿产厅,850000;
3.成都地质矿产研究所,610082 |
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| 基金项目： | 西藏科委重点项目(990 10 7)，国土资源部定向基金项目 (970 42 )联合资助 |
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| 摘 要： | 西藏南部江孜盆地的沙拉岗矿区发育一套晚侏罗至早白垩世的碎屑流、滑动流与浊流等重力流沉积,主要由斜坡相碎屑岩夹硅质岩和灰岩构成。在这个斜坡背景中出现了上斜坡相,下斜坡相与海底扇相等3种类型的岩相组合。其中，上斜坡以各种规模的滑动沉积为特色，下斜坡以不同性质的碎屑流沉积为特征。海底扇具有完整的内扇、中扇与外扇组合，可划分出进积型和退积型两种序列类型，它们多半是由浊流形成的各种砂体组成的。
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| 关 键 词： | 藏南江孜盆地 侏罗世 白垩世 重力流 沉积 海底扇 |
| 修稿时间： | 2000年4月19日 |
GRAVITY FLOW SEDIMENTS OF THE LATE JURASSIC-EARLY CRETACEOUS OF JOMZI BASIN IN SOUTHERN TIBET |
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| Peng Yongmin,Li Jingao Yao Peng.GRAVITY FLOW SEDIMENTS OF THE LATE JURASSIC-EARLY CRETACEOUS OF JOMZI BASIN IN SOUTHERN TIBET[J].Journal of Palaeogeography,2000,2(3):37-44. |
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| Authors: | Peng Yongmin Li Jingao Yao Peng |
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| Institution: | 1.China University of Mining and Technology;
2.Tibet Bureau of Geology and Mineral Resources);
3. Chengdu Institute of Geology and Mineral Resources |
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| Abstract: | The well known gravity flow sediments were formed by the debris, slide and turbidity flows in the Late Jurassic-Early Cretaceous in Shalagang mining area of Jomzi Basin in southern Tibet, which consisted of the slope clastic rocks and interbeds of siliceous rocks and limestones. Three lithofacies assemblages of upper slope, lower slope and submarine fan emerged in the slope. The upper slope was characterized by all kinds of sliding sediments and lower slope by all kinds of debris flow sediments. The submarine fan with completely inner, middle and outer fan can be divided into progressive and regressive sequence, which were composed of sandstone bodies formed by turbidity flow. |
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| Keywords: | southern Tibet Jomzi Basin gravity flow slides sediments submarine fan |
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