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甘孜-理塘蛇绿混杂岩带中段洋岛型岩石组合的发现及地质意义*
投稿时间:2018-12-10  修订日期:2019-02-26  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2019137
摘要点击次数: 131
全文下载次数: 188
作者单位E-mail
严松涛 中国人民武装警察部队黄金第十二支队 yansongtaowj@163.com 
谭昌海 中国人民武装警察部队黄金第十二支队  
段阳海 中国人民武装警察部队黄金第十二支队  
李虎 中国人民武装警察部队黄金第十二支队  
中文摘要:甘孜-理塘蛇绿混杂岩带位于西南“三江”多岛弧盆系东缘,作为研究特提斯洋发展演化的重要组成部分。本文以甘孜-理塘蛇绿混杂岩带中段新龙-理塘地区新发现的洋岛型岩石组合为研究对象,通过对其沉积特征分析认为研究区洋岛型岩石组合形成环境大致划分为台地相、斜坡相、斜坡脚-洋盆相。通过对其年代学研究表明甘孜-理塘洋盆在早二叠世时期就已存在成熟洋壳,并且洋岛火山活动一直持续至晚三叠世。该项研究进一步丰富了甘孜-理塘蛇绿混杂岩带的演化内容,为反演区域地质演化历史提供了依据。
中文关键词:洋岛型岩石组合  构造环境  形成时代  甘孜-理塘蛇绿混杂岩带  西南三江
 
The discovery of the ocean island rock association in the middle part of the Ganzi-Litang Ophiolite Mélange Belt and its geological implications
Author NameAffiliationE-mail
YAN Songtao 12th Gold Team of Chinese People’s Armed Police,Chengdu,610000
China 
yansongtaowj@163.com 
TAN Changhai 12th Gold Team of Chinese People’s Armed Police,Chengdu,610000
China 
 
DUAN Yanghai 12th Gold Team of Chinese People’s Armed Police,Chengdu,610000
China 
 
LI Hu 12th Gold Team of Chinese People’s Armed Police,Chengdu,610000
China 
 
Abstract:The Ganzi-Litang ophiolite mélange belt is located in the east section of the ‘Three-River’ archipelagic arc basin system in Southwest of China, which is an important part of a study development and evolution of the Tethys ocean. this paper conducted detailed research on the sedimentary characteristics of the Ocean island rock association from the Xinlong-Litang area in the middle part of the Ganzi-Litang Ophiolite Mélange Belt, and the results indicate that the formation environment can be divided to platform facies, slope facies, base of slope-basin facies. By chronological study of the Ocean island rock association , The results show that the Ganzi-Litang ocean basin exist mature ocean shell in the Early Permian, and volcanic activity continued to late Triassic. The results achieved by the authors have enriched the study of the evolution of the Ganzi-Litang ophiolite mélange belt and provided the basis for reconstructing the regional geological evolution.
keywords:Ocean island rock association  Formation environment  Formation age  The Ganzi-Litang Ophiolite Mélange Belt  The ‘Three-River’ orogenic belt in Southwest of China
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