【摘要】 构造解析应从构造的变形机制、变形过程、变形量和变形时间四个方面入手,合理的构造解释方案是构造解析的基础,论文将等倾角区划分和轴面分析等几何学方法应用到地震解释中,从以上4个方面对准噶尔盆地南缘第一排背斜带做了系统的构造解析。地层结构揭示第一排背斜带深部发育楔状构造,楔状构造由5个古生界—中生界组成的断层转折褶皱叠加而成,是潜在的勘探目标群。在构造楔沿侏罗系西山窑组煤层向北扩展过程中,台阶状逆断层的大部分位移量沿构造楔顶部的反冲断层向南消减,另一部分位移量则沿西山窑组煤层向北传递至第二排背斜带,在总位移量保持稳定的前提下,第一排背斜带和第二排背斜带在走向上的此消彼长,反映位移量在南、北两个方向上的转换。更多还原

【Abstract】 The aim of complex structural analysis on foreland thrust belts, which is based on a rational interpreted seismic profile, is to determine the mechanisms, process, rate and timing of deformation. Several geometric techniques, such as separating dip domains and analyzing axial surfaces, are used in seismic interpretation and structural analysis of the first row of anticlinal belt in the southern Junggar Foreland Basin. The patterns of growth strata indicate that the first row of anticlinal belt was developed above the passive back thrust on the top of the deep structural wedge, which is imbricated by five Paleozoic—Mesozoic fault-bend folds, and the upper two anticlines may be potential targets in exploration. The most displacement on the deep flat-ramp-flat thrusts transfer southward along the back thrust, located in the coal layers of middle Jurassic, and only a few displacement transfer northward to the second row of anticlinal belt. So, the elevating or plunging between these two anticlinal belts indicates the displacement transfer on the direction of the south and north.更多还原