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首页> 外文期刊>AAPG Bulletin >Regional transect across the western Caribbean Sea based on integration of geologic, seismic reflection, gravity, and magnetic data
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Regional transect across the western Caribbean Sea based on integration of geologic, seismic reflection, gravity, and magnetic data

机译：基于地质，地震反射，重力和磁数据的整合，地区横跨西加勒比海横跨

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摘要

We analyze western Caribbean structural styles and depositional controls associated with Late Cretaceous-Cenozoic deformational events using a 1600-km (994-mi)-long, regional, northwest-southeast transect extending from the Cayman Trough in Honduras to northern Colombia. Different structural provinces defined along the transect include (1) the Cayman Trough and adjacent Honduran borderlands marking the North American- Caribbean transtensional plate boundary characterized by late Eocene-Holocene fault-controlled depocenters; (2) the Nicaraguan Rise that includes continental Paleocene-Eocene rocks deposited in sag basins, which are overlain by relatively undeformed Miocene-Holocene carbonate and clastic shelf deposits of the northern Nicaraguan Rise, following a Late Cretaceous convergent phase; (3) the Colombian Basin that includes thick Miocene clastic depocenters and the localized presence of Upper Cretaceous rocks overlying the basement and where much of the subsidence is likely isostatic and flexurally driven given its proximity to the subduction zone of northern Colombia; (4) the south Caribbean deformed belt, an active, accretionary prism produced by the subduction of the Caribbean large igneous province beneath the South American plate, which has deformed the Cenozoic prism and fore-arc section and produced thrust-fault-controlled accommodation space for upper Miocene-Holocene piggyback deposits; and (5) the onshore Cesar-Rancheria Basin in northern Colombia, which has recorded the uplift of its bounding mountain ranges, the Sierra de Santa Marta massif to the west and Perija Range to the east. Plate reconstructions place the various crustal provinces along the transect into the context of the Late Cretaceous-Cenozoic deformation events that can be partitioned into strike-slip, convergent, and extensional components.
机译：我们分析了来自洪都拉斯州洪都拉斯的洪都拉斯州至北部的哥伦比亚北部的1200公里（994英里）-Long，地区，西北地区与晚白人 - 新生代历程相关的西加勒比结构风格和沉积控制。沿横断所定义的不同结构省包括（1）Cayman Trough和邻近的洪都拉斯边境标志着北美加勒比横向板的边界，其特征是由晚期 - 全新世故障控制的卵景; （2）尼加拉瓜崛起包括沉积在凹陷盆地中的大陆古植物岩石，其在晚餐会聚阶段之后，通过相对未变形的中新生 - 全新烯 - 全茂碳酸酯和尼加拉瓜北部的碎屑架沉积物覆盖物; （3）哥伦比亚盆地，包括厚的内肾上腺碎片，覆盖地下室的上白垩纪岩石的局部存在，并且在大部分沉降中可能是等静脉和柔美的驱动，但围绕哥伦比亚北部的俯冲区; （4）南加勒比变形皮带，由南美板块下面的加勒比大火省拍摄生产的活跃，增生棱镜，使新生代棱镜和前弧段变形并产生推力 - 故障受控的住宿空间上部内科 - 全新世肩扛沉积物; （5）哥伦比亚北部的陆上Cesar-rancheria盆地，它录制了其边界山脉的隆起，塞拉德圣马塔·米特（Sierra de Santa Marta Massif）到西部和Perija范围到东方。板重建将各种地壳省份沿后横断到可分配到滑动，收敛和延伸部件的后期白垩纪 - 新生代变形事件的背景下。

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