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地质学报  2009 

奠边府断裂带的走滑特征及其区域构造分析

, PP. 1401-1414

Keywords: 奠边府断裂带,遥感解译,第四纪盆地,鲜水河-小江断裂,红河断裂

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Abstract:

位于越南西北部的奠边府(DienBienPhu)断裂,向北延伸入中国云南境内,向南进入老挝境内,走向由近N-S向南逐渐过度为NE-SW向,倾角陡立。沿着断裂带发育了三个具有不同运动学机制的第四纪盆地――婵讷(ChanNua)盆地、莱州(LaiChau)盆地和奠边府盆地。根据对奠边府断裂带地区ETM遥感数据进行详细解译以及野外实地考察,得到奠边府断裂具有早期的右行走滑和后期的左行走滑特征的证据;并且根据断裂两侧水系受断裂影响发生左错的程度不同,认为奠边府断裂的西盘相对于东盘较为活动,即为主动盘。奠边府断裂北延进入越南境内,与金平地区的三家河断裂相连,并继续向北并入哀牢山剪切带中。奠边府断裂现今的左行走滑与红河断裂现今的右行走滑共同组成了一组共轭断裂系。

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