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笔者从 16 0口单井剖面、15条联井剖面及 5个层位平面渐次展开了准噶尔西北缘前陆冲断带二叠纪逆冲断裂活动的沉积响应研究。各种成因扇体 (冲积扇、水下扇、扇三角洲 )在佳木河组和上乌尔禾组地层中最为发育 ,其沉积分布严格受不同时期活动的同生断裂控制。由早二叠世佳木河期至晚二叠世上乌尔禾期 ,扇体在克拉玛依—夏子街地区叠置程度较好 ,由盆缘向盆内迁移、推进明显 ;在车排子—中拐地区叠置程度相对较差 ,局部略呈向盆缘老山收缩、后退趋势 ,表明红山嘴 -车排子断裂带与克拉玛依 -百口泉断阶带、乌尔禾 -夏子街断褶带逆冲活动的强度及地域迁移性有明显差异。二叠纪总体为一由弱到强的前展式推覆冲断及渐进式扇体迁移模式 ,即随同生控扇断裂由老山向盆缘的前展式推覆活动 ,相应地 ,各构造带扇体逐渐由盆缘向盆地方向发育、推进 ,扇体面积不断扩大 ,显示出明显的渐进式迁移的沉积响应 ,两者形成良好的耦合性。进而引入“活动性指数”的概念与方法 ,对前陆冲断带同生断裂的冲断活动强度进行了定量化统计分析 ,据二叠纪冲断推覆事件的地层、沉积标识 ,识别出 3个逆冲推覆幕、7个逆冲推覆事件 ,划分出 P1 j— P1 f、P2 x— P2 w、P3w三套构造层序 ,并指出在 P1 f、P2 x及P2 + 3w各时期 ,由红山嘴 -车?
From 16 single-well cross-section, 15 cross-well section and five horizon planes, the sedimentary response of Permian thrust events in the foreland thrust belt of the northwestern part of Junggar is gradually developed. All kinds of fan bodies (alluvial fan, underwater fan, fan delta) are the most developed in the Jiamuhe and Upper Wuerhe formations, and the sedimentary distribution is strictly controlled by synsedimentary faults in different periods. From the Early Permian Jiamu period to late Permian Wuerhe period, the fan body in the Karamay - Xiazijie area is better than the basin, from the basin edge to the basin migration, promote significantly; in the car Paizi - Shui Po area superimposed relatively poorly, the local slightly to the basin margin contraction, backward trend, indicating that the Hongshan mouth - car Paizi fault zone and Karamay - Baikouquan fault step, Wuerhe - Xiazi Street fold There is a clear difference in intensity and regional mobility with thrust activity. The Permian is generally characterized by a weak to strong foreshortening thrust-thrusting and progressive fan-body movement pattern, that is, a foregone nappe activity from the Laoshan to the basin margin along with the birth control fan fault. Correspondingly, The tectonic belts gradually developed from the basin edge to the basin, advancing, and the area of the fan body continued to expand, showing a clear depositional response to the gradual migration, forming a good coupling between the two. Then, the concept and method of “activity index” were introduced to quantitatively analyze the intensity of thrusting activity of the synoptic fault in the foreland thrust belt. According to the stratigraphic and sedimentary identification of Permian thrust events in the Permian, Three thrusts, three thrusts and seven thrusts. Three sequence stratigraphic sequences of P1j-P1f, P2x-P2w and P3w are defined, and it is pointed out that in P1f, P2x and P2 + 3w Period, from the red mouth - car?