Tectonic Inversion of Early Cretaceous Bisbee Basin as a primary control of Laramide Structural Style and Trends, Southeastern Arizona and Southwestern New Mexico

早白垩世比斯比盆地的构造反转是亚利桑那州东南部和新墨西哥州西南部拉拉米德构造风格和趋势的主要控制

• 批准号: 9304759
• 负责人: Timothy Lawton
• 金额: $ 8.36万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304759&HistoricalAwards=false
• 关键词: Tectonic; Inversion; Early; Cretaceous; Bisbee

In orogenic zones affected by multiple deformation events, it is common for structural features such as faults to be reactivated, although documenting multiple movements, of the same or different displacement styles has proven to be difficult. This project will address this classic problem by looking at spatial variations in facies and thickness of syn-deformational sedimentary units in proximity to faults of the Bisbee Group (Early Cretaceous) in two key areas where the section appears to be anomalously thick. These rocks subsequently were deformed by Late Cretaceous to Paleogene age were deformed by Late Cretaceous to Paleogene age (Laramide) compression. If the Laramide structure was previously a major normal fault in early Cretaceous time, characteristics of the Lower Cretaceous strata (paleocurrents, thickness variations etc) should record proximity to the fault. Results have the potential to unambiguously separate the effects of the two tectonic events superimposed on this area, and by extension may provide sedimentologic and structural criteria to resolve multiple fault reactivations elsewhere.

在受多次变形影响的造山带中 事件，它是常见的结构特征，如断层 被重新激活，虽然记录了多次运动， 事实证明，相同或不同的位移方式 很难 该项目将解决这一经典 通过观察相的空间变化， 同变形沉积单元厚度 比斯比群断层附近（早白垩世） 在两个关键领域，该部分似乎是有害的， 厚 这些岩石随后被后期的 白垩纪至早第三纪受晚白垩世变形 至古近纪（Laramide）压缩。 如果Laramide 构造在早期是一个主要的正断层， 白垩纪时间，下白垩纪的特征 地层（古水流、厚度变化等）应 记录与断层的距离。 结果有可能 明确区分两种构造的影响 叠加在这一地区的事件，并通过扩展， 提供沉积学和构造标准， 其他地方的多个故障重新激活。