金沙江上游快速隆升河段复杂结构岩体灾变特征与机理
发布时间:2018-01-09 23:22
本文关键词:金沙江上游快速隆升河段复杂结构岩体灾变特征与机理 出处:《吉林大学学报(地球科学版)》2016年04期 论文类型:期刊论文
更多相关文章: 快速隆升河段 复杂结构岩体 堵江残体 潜灾体 金沙江上游
【摘要】:横断山脉北麓金沙江上游河段沟壑纵横,水能资源丰富。中、晚更新世以来,快速隆升的新构造活动导致该河段复杂结构岩体在重力场的持续作用下灾变频繁。笔者阐述了该河段高地应力的基础地质背景与金沙江板块构造结合带蛇绿岩套的复杂结构岩体基本特征,提出了快速隆升河段的基本认知,建议将≥5mm/a作为快速隆升河段的界限值;列举了21.4km河段内不同时期、不同类型4处大规模堵江事件的证据和基本特征,阐述了其与快速隆升之间的关系;运用地质过程机制法分析了4个堵江体的致灾机理,指出早期堵江残体为未来人类工程活动的潜灾体。
[Abstract]:The upper reaches of Jinsha River in the northern foothills of Hengduan Mountains are rich in water energy resources since the late Pleistocene. The rapid uplift of the new tectonic activity leads to frequent disasters of the complex structural rock mass in the reach under the continuous action of gravity field. The basic geological background of the high geostress in the reach and the ophiolite suite in the Jinshajiang plate tectonics combination zone are expounded in this paper. The basic characteristics of rock mass with complex structure based on. The basic cognition of the rapid uplift reach is put forward, and it is suggested that 鈮,
本文编号:1402958
本文链接:https://www.wllwen.com/kejilunwen/diqiudizhi/1402958.html