礼县—罗家堡断裂带宕昌—黄咀段全新世活动的地貌证据  

The Geomorphologic Evidences of Activity in Tanchang--Huangzui Segment of LixianmLuojiabao Fault Zone since the Holocene

作　　者：苏永奇[1] 刘洪春[1] 王多杰[1] 

机构地区：[1]中国地震局兰州地震研究所

出　　处：《西北地震学报》2013年第B12期116-121,共6页Northwestern Seismological Journal

基　　金：中国地震局兰州地震研究所地震科技发展青年基金（2011Q07）

摘　　要：普遍认为礼县-罗家堡断裂带是一条晚第四纪活动断裂，是1654年天水南8级大地震的发震构造。但该断裂带西段宕昌-黄咀段的活动证据一直以来不是很明确。笔者在进行某项目近场地质调查中，发现一些该断裂段的最新地貌活动证据，认为该断裂段在全新世有过明显活动。It is generally considered that Lixian-- Luo Jiabao fault zone is an active fault in late qua- ternary period, and it is also the seismogenic structure of Tianshui MsS. 0 earthquake in 1654. But the activity evidences of Tanchang--Huangzui segment located at the western of that fault zone are not very indeterminate all the time. In the near-field geological investigation of some pro- ject, we found some latest geomorphological activity evidences of that fault segment, so we be- lieved that at the fault segment there were obvious activities in the Holocene.

关 键 词：礼县-罗家堡断裂带 地表破裂 地貌证据 

分 类 号：P315.2[天文地球—地震学]