四川地质学报

阿曼山前冲断带位于阿拉伯板块东北缘，是晚白垩世新特提斯洋关闭形成的周缘前陆构造带。冲断带岩性组合复杂多样，空间上逆冲推覆距离和形变程度差异大，给构造解释和勘探潜力评价带来较大困难和挑战。本文以沙迦地区阿曼山前冲断带评价为例，在构造演化和地表露头分析基础上，建立该区剖面构造模式和立体推进模式。沙迦地区冲断带由海向陆方向划分为蛇绿岩仰冲带、洋壳混杂岩推覆体带和前缘逆冲带三个构造带。其中蛇绿岩仰冲带和洋壳混杂岩推覆体带以蛇绿岩和洋壳混杂岩为主，油气勘探潜力差；前缘逆冲带发育侏罗系和白恶系地层及叠瓦状逆冲构造，勘探潜力较大，并且形变程度大的前缘带剩余隐蔽逆冲构造具有一定勘探潜力。

The Oman Piedmont Thrust Belt is located on the northeastern margin of the Arabian Plate, which is a peripheral foreland tectonic belt formed by the closure of the Neo-Tethys Ocean in the Late Cretaceous. The lithological assemblage in the thrust belt is complex and diverse, and there are significant differences in the distance of thrust overlying and the degree of deformation in space, which brings considerable difficulties and challenges to structural interpretation and exploration potential evaluation. Taking the Oman Piedmont Thrust Belt in Sharjah as an example, this paper establishes the profile structural model and three-dimensional propulsion model of this area based on the analysis of tectonic evolution and surface outcrops. The thrust belt in Sharjah is divided into three structural zones from the sea to the land: the ophiolite obduction zone, the oceanic crust melange nappe zone and the frontal thrust zone. Among them, the ophiolite obduction zone and the oceanic crust melange nappe zone are mainly composed of ophiolite and oceanic crust melange, and have poor potential for oil and gas exploration. The thrust zone at the leading edge is well-developed with Jurassic and Cretaceous strata and imbricate thrust structures, presenting considerable exploration potential. Moreover, the remaining concealed thrust structures in the leading edge zone with a large degree of deformation also have certain exploration potential.