Plio-Pleistocene Forearc Deformation at a Ridge-Trench- Trench Triple Junction: A Geologic Study of Emerged Coral Reefs and Marine Sedimentary Rocks, New Georgia Island Group

山脊-海沟-海沟三重交界处的上更新世前弧变形：新乔治亚岛群新兴珊瑚礁和海洋沉积岩的地质研究

• 批准号: 9019985
• 负责人: Paul Mann
• 金额: $ 12万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019985&HistoricalAwards=false
• 关键词: Plio; Pleistocene; Forearc; Deformation; Ridge

A number of models exist for the neotectonics involved with a ridge-trench-trench triple junction, however, these are difficult to test, partly due to a scarcity of suitable modern examples. This project will focus on differential uplift associated with the subduction of an active spreading ridge in the Solomon Islands where the ridge axis is oblique to the trench. Uplifted and deformed Late Pleistocene coral reefs will provide critical age information and elevation relative to sea level data required to reconstruct the uplift history in the vicinity of the ridge subduction. Results are expected to provide patterns and rates of uplift that can be applied to less well-exposed and more ancient examples of ridge-ridge-trench systems.

有许多模型存在的新构造涉及一个 然而，脊-沟槽-沟槽三重结，这些是困难的 测试，部分原因是缺乏合适的现代例子。 该项目将重点关注与 所罗门群岛活动扩张脊的俯冲 其中脊轴倾斜于沟槽。 抬升和 变形的晚更新世珊瑚礁将提供 所需的相对于海平面数据的信息和高程， 恢复海岭附近的隆升历史 俯冲 预计结果将提供以下模式和比率： 隆起，可以适用于暴露较少和更古老的 脊-脊-沟系统的例子。