边缘断层

天祝盆地边缘断层的全新世活动及盆地的演化与形成

Holocene activity of faults around tre Tianzhu basin and evolutionary process of the basin

这些地层的分布规律、沉积环境的变化说明了乌当断层为黔中隆起南侧边缘断层，且该断层自早古生代形成后，为一多期次活动断层。

The stratigraphic distribution and various depositional environments showed that it is the Wudang fault that constitutes the southern boundary of the Middle Guizhou Uplift , and the fault was formed in Early Palaeozoic and it was still active in Late Palaeozoic .

中国西部5大含油气盆地边缘断层均是上冲到顶，前第四系地层逆冲到第四系地层之上，说明中国西部含油气盆地和周边时代老的山体最终的形成是在第四纪时期。

Marginal faults of the five petroliferous basins in the west of China all up-thrust to the top . Pre-Quaternary strata thrust over Quaternary sediments , indicating that the petroliferous basins in the west of China and the surrounding older mountains were formed in Quaternary period .

陡坡带和缓坡带，油气输导体系主要为断裂-砂体复合型，油气运移优势方向为垂直于盆地边缘边界断层的鼻状构造带的展布方向。

For the ( abrupt ) slope and ramp zones , there was a carrier system dominated by fault-sand body combination , and the dominant direction of migration was along the nose trend vertical to the basin boundary fault .

盆地结构一般呈地堑一地垒式或半地堑一半地垒式，边缘受正断层（生长断层）控制。

Controlled by normal faults ( growth faults ), they assume the general character of graben-horst or semigraben-semihorst .

在原始油藏边缘，微型断层圈闭、砂岩尖灭圈闭是剩余油富集区；

On the edge of a primitive pool , the miniature fault and wedge-out traps have a high residual oil potential .

北部边缘同生断层对第一、二、三砂层组碎屑物质供给起控制作用，第四砂层组则具有多物源供给趋势。

The north marginal contemporaneous fault controlled the debris supply of 1st ~ 3rd sand beds , and the forth sand bed seemed to have multi source supplies .

结果表明，地应力在断层端部出现明显的应力集中现象，断层边缘为应力变化剧烈区域；断层边缘地应力分布随断层倾角不同而变化。

The result indicated that the crustal stress in the fault ends appeared the obvious stress concentration phenomenon , the fault edges were fierce regions of stress variation , and the stress distribution nearby the fault changed along with the fault inclination angle .