| 仲新,李鸿睿,颉贵琴,刘晔.北祁连西段肮脏沟组重力流沉积特征及地质意义[J].矿产勘查,2019,(6):1369-1376 |
| 北祁连西段肮脏沟组重力流沉积特征及地质意义 |
| The sedimentary charavteristics of gravity flow deposit of Angzanggou formation in the Western section of North Qilian |
| 投稿时间：2019-01-10 |
| DOI： |
| 中文关键词: 前陆盆地 张掖地质公园 重力流沉积 块状硫化物型铜矿 北祁连造山带 |
| 英文关键词: Foreland basin,Zhangye national geopark,gravity flowdeposits,VMS,the western section of north Qilian |
| 基金项目:甘肃省基础地质调查研究项目《甘肃省特殊景观区典型地质剖面综合调查研究》资助。 |
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| 摘要点击次数: 1959 |
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| 中文摘要: |
| 北祁连造山带为一多旋回复合造山带,由一系列复合混杂岩及夹持于其间的大陆碎块组成。区内发育于志留纪肮脏沟组早期的重力流沉积是一套滑塌堆积物,又称绿磨拉石建造,代表了主造山阶段晚期残留海盆地演化特征。在北祁连山张掖国家地质公园肃南松大坂沟和东部鹿角沟一带均较发育,横向上构成深海扇浊流沉积,包括盆地平原、外扇、中扇和内扇等。本文作者在野外调查基础上,通过研究重力流沉积建造序列和沉积构成,从事件沉积角度,探讨了北祁连加里东造山带快速隆升,残留海盆地向前陆盆地转化的地质构造背景。 |
| 英文摘要: |
| The north Qilian mountains,which are composed of a series of composite melange and mainland fragments ,area series of polycyclic composite orogeny.The gravity flow sediments of study areas,largely exist in the Songdaban valley and Lujiao valley of Sunan couty,Zhangye national geopark,northern Qilian mountain ,are a set of olistostrome(also called the green Molasse formation) that can reflect the characteristics of the residual oceanic basin’s evolution in the late orogenic phase(early Silurian Period).Besides,these gravity flow deposits are consist of a set of Deep-sea fan turbidity current including basin plain,outer fan,middle fan and inner fan.On the basis of field geological survey ,we can make a conclusion that,the study area’s deposits had experienced a convertion from residual oceanic basin to foreland basin after the collisions and rapid uplifts during Caledonian. |
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