哀牢山-红河断裂带新生代构造转换及其动力学机制
投稿时间:2016-07-11  最后修改时间:2016-07-22  点此下载全文
引用本文:
DOI:
摘要点击次数: 325
全文下载次数: 
作者单位E-mail
黄学猛 地壳动力学重点实验室中国地震局地壳应力研究所 huangmeng00000@163.com 
许志琴 中国地质科学院地质研究所  
张进江 造山带与地壳演化教育部重点实验室北京大学地球与空间科学学院  
基金项目:中央级公益性科研院所基本科研业务专项(ZDJ2016-18)
中文摘要:哀牢山-红河断裂带位于青藏高原东南缘,由青藏高原延入南海,是一条分割华南地块与印支地块的构造分界线,在地貌上也是一条醒目的分界线。纵向上由4个北西向的长条状变质带组成(雪龙山、点苍山、哀牢山和Day Nui Con Voi变质带),长约1200 km。通过滇西北断陷盆地、莺歌海盆地和断裂沿线新生代地层沉积、变形调查,找到了两期走滑及其配套变形的地质证据。根据哀牢山-红河断裂带滇西北尾端、莺歌海东南尾端构造转换及年代研究,并结合该断裂带左旋韧性变形结束的时代为13Ma,综合判断哀牢山-红河断裂带新生代左/右行构造转换的时间为13-10 Ma。该年代与鲜水河-小江断裂左旋走滑的启动时间以及青藏高原东南缘构造隆升与侵蚀下切时代具有较好的一致性。
中文关键词:哀牢山-红河断裂带,构造转换,滇西北断陷盆地,东构造结,应力轨迹
 
Cenozoic tectonic transition and dynamic mechanism of the Ailao Shan-Red River fault zone
Abstract:The Ailao Shan-Red River fault zone (ASRRFZ) in southeastern Tibet, which extends from the Tibet plateau to the South China Sea, is a geological and geomorphic boundary between South China block and Indochina block. This fault zone, about 1200km long, is longitudinally divided into the Xuelong Shan, Diancang Shan, Ailao Shan, and Day Nui Con Voi metamorphic massifs. Based on the sedimentation and tectonic analysis of the Cenozoic sediments of the northwestern extensional basin system in NW Yunnan and Gulf of Tokin, two sets of tectonics associated with the left- and right-lateral motion of the ASRRFZ are distinguished. Based on the tectonic transition and age constrains of the NYEBS and Yinggehai basin, together with the termination of left-lateral shearing of the ASRRFZ at 13Ma, the tectonic transition from left- to right-lateral motion of the ASRRFZ occurred at 13-10Ma. This age is in accordance with the initiation of the Xianshuihe-Xiaojiang fault system and the tectonic uplift and incision of the southeastern Tibet Plateau.
keywords:Ailao Shan-Red River fault zone, Tectonic transition, The northwestern Yunnan extensional basins system, Eastern Himalayan syntaxis, Stress trajectory
查看全文  查看/发表评论  下载PDF阅读器
版权所有 《地球学报》编辑部 Copyright©2008 All Rights Reserved
主管单位:国土资源部 主办单位:中国地质科学院
地址: 北京市西城区百万庄大街26号,中国地质科学院东楼317室 邮编:100037 电话:010-68327396 E-mail: diqiuxb@126.com
技术支持:东方网景