摘要:阿曼山北部西侧前陆区勘探程度很低，目前的构造单元划分弱化了其重要性，深化区域构造地质特征及演化过程具有重要科学意义。依据区域最新的重力及井震资料，以构造地质建模理论为指导并结合生长地层分析及平衡剖面方法，开展对区域的构造演化分析。研究认为阿曼山北部西侧前陆区以收缩构造为主，具有完整的前陆盆地结构。生长地层特征显示区域发育两期快速隆升时期，晚白垩世区域开始进入前陆演化阶段，构造结构定型于中新世。Fiqa组泥岩作为区域重要的滑脱层，对区域的变形起到了重要作用。通过剖面复原技术可以将区域演化划分为3大时期4个阶段，中、新生代区域长时间处于被动陆缘演化阶段，发育多旋回大套的碳酸盐岩，生储盖空间配置良好，具有较大勘探潜力。
关键词: 前陆盆地/
鲁卜哈利盆地/
阿曼山褶皱带/
构造区划
Abstract:The western foreland of the northern Oman Mountains has been only less explored, and its importance is underestimated under the current division of tectonic units. So, deeper understanding to the geological evolution of this area is significant scientifically. Based on the latest gravity and well-seismic data, we analyzed the structural evolution characteristics of this area, according to the geological structure modeling theory and using the growth strata analysis and equilibrium profile methods. The results show that the western foreland of the northern Oman Mountains is dominated by shrinkage structures and has complete structures of foreland basin. The structural evolution can be divided into four stages in three phases by using the profile restoration technology. According to the characteristics of growth strata, the study area experienced two stages of rapid uplift, and was structurally finalized in the Miocene after a foreland evolution stage from the Late Cretaceous; the foreland evolved as passive continental margin for a long time, resulting in a large set of multi-cycle carbonate rocks, and forming a good assemblage of source rock, reservoir, and cap rock in space. Thus, the western foreland is believed to have a great exploration potential.
Key words:Foreland basin/
Rub Al Khali Basin/
Oman Mountain fold belt/
Structural division
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