巴彦浩特盆地构造样式分析及其意义

Structural Pattern Analysis of Bayanhaote Basin and Its Significance

巴彦浩特盆地是在早古生代早期的秦、祁、贺三叉裂谷系交岔带发育起来的复合－叠加型盆地。由于其所处的特殊的构造位置和复杂的构造演化历史，使盆地发育了丰富多样的构造样式：压缩构造样式主要有叠瓦状冲断层、背冲、对冲构造组合、牵引背斜、滚板构造等；伸展构造样式主要有铲形正断层与掀斜断块、反向断层与滚动背斜、“垒－堑”构造等；走滑构造样式主要有花状构造、雁列断层等；另外，还有与重力等其它因素有关的构造样式发育，如压实构造、底辟构造等。不同的构造样式伴生有不同的油气圈闭类型，综合分析石油地质条件认为：黑汕托－通古楼背斜构造带为最有利构造带，阿门子－查汗背斜构造带次之，并预测该盆地具有良好的油气勘探前景。

Bayanhaote Basin is a multiple-overlapping basin which developed in the crossing zone of Qinlin, Qilian and Helan trifurcate rift system during the early of lower Palaeozoic. Various structural patterns developed in this basindue to its special structural location and complex structural evolution history: compressional structural pattern mainly includes imbricated thrust,back thrust and ramp assemblage;stretching structural pattern principally consists of listric normal fault and tilt block,antithetic fault and rollover anticline, and 'horst - graben'structure; strike slip structural pattern mainly are nower-type structure and en echelon fault,additionally, there also developcd structural pattern relevant to gravity and other factors, sucb, as compactional structure and ciapir structure. Different structure patterns are accompanicd with different trap types.It is believed based on comprehensive analysis of the petroleum geological conditions that HeishantouTonggulou anticline structural zone is the most favorable,while Amenzi - Chahan anticline structure takes second place, and that petroleum exploration prospect is bright in this basin.