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萨热克盆地库孜贡苏组(J3k)对特提斯洋关闭的沉积响应
投稿时间:2019-02-08  修订日期:2019-03-20  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2019175
摘要点击次数: 125
全文下载次数: 138
作者单位E-mail
胡加昆 云南冶金资源股份有限公司 云南 昆明 650216 331821322@qq.com 
陆俊吉 云南冶金资源股份有限公司 云南 昆明 650216  
杨福全 云南冶金资源股份有限公司 云南 昆明 650216  
基金项目:中国地质调查局
中文摘要:前人对班公湖-怒江特提斯洋关闭过程和班-怒缝合带的形成年龄研究较多,对于它引起的远程沉积响应报道较少,研究其引起的地层沉积响应很有必要。通过西南天山山前萨热克盆地内库孜贡苏组地层的砾石统计分析、沉积相分析、高分辨率层序地层学分析,认为萨热克盆地库孜贡苏组是冲积扇相沉积、划分为两个中期沉积旋回。结果显示晚侏罗世班公湖-怒江特提斯洋俯冲碰撞过程引起的远程沉积响应可分为两个期次,第一期次活动较弱;第二期次活动剧烈,沉积了厚层的细砾岩、中砾岩和粗砾岩。冲积扇砾岩的沉积暗示了班公湖-怒江特提斯洋在晚侏罗世板块向北俯冲碰撞引起西南天山地区山体抬升剥蚀、形成盆内具磨拉石建造的沉积砾岩地层。
中文关键词:班公湖-怒江特提斯洋 沉积响应 西南天山 库孜贡苏组 俯冲碰撞
 
Sedimentary response of kuzigong su formation (J3k) to tethys ocean shut-down in sarek basin
Author NameAffiliationE-mail
HU Jia-Kun Yunnan Metallurgical Resources Group CO.,Ltd.,Kunming 331821322@qq.com 
LU Jun-ji Yunnan Metallurgical Resources Group CO.,Ltd.,Kunming  
YANG Fu-quan Yunnan Metallurgical Resources Group CO.,Ltd.,Kunming  
Abstract:There is a lot of controversy for Bangong-Nujiang Tethys Ocean subduction direction and closing time, Previous studies mostly is on the age of Bangong-Nujiang suture zone, but the reports for Bangong-Nujiang Tethyan subduction collision caused Remote effect is not as enthusiastic as hoped, Study remote deposition response is necessary. The gravel statistical analysis, sedimentary facies analysis and high resolution sequence stratigraphy analysis of the Kuzi Formation in the Sazek Basin of the Southwest Tianshan Mountains, gets concluded that the Kuzigongsu Formation in the Sazek Basin is alluvial sector and divided into two intermediate sedimentary cycles. Study shows that the remote sedimentary response caused by the dive collision of Zhuluoshiban and Nujiang Tethys can be divided into two periods, the Dive collision process in the first periods is not strong, but is very intense in the second period, caused Thick layers of breccia, middle breccia and coarse breccia deposited. Bangong-Nujiang Tethyan subduction collision is caused the orogeny in southwest Tianshan Mountain Region,Southwest Tianshan orogenic activity maked the mountain uplift and erosion by recorded travertine fission track.
keywords:Bangonghu - Nujiang tethys ocean  The sedimentary response  Southwest Tianshan  Kuzigongsu formation  subduction collision
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