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The structural and environmental history of the Suguta Valley, Northern Kenya Rift

肯尼亚北部裂谷苏古塔谷的结构和环境历史

基本信息

批准号：
46753714
负责人：
Professor Dr. Martin Trauth
金额：
--
依托单位：
Institut für Geowissenschaften
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/46753714?language=en
关键词：
structural environmental history Suguta Valley

项目摘要

We propose a last one-week expedition to investigate the late Cenozoic structural inventory and lacustrine history of the remote Suguta Valley, northern Kenya. The fundamental objectives of the project are: Defining the structural boundary conditions of lacustrine paleoclimate archives and deciphering the paleo-environmental history using lacustrine sediments. After having completed structural mapping and investigating the Holocene lacustrine sediments in the valley, the objectives for the final phase of the project with special emphasis on the Mid Pleistocene are: (1) What is the character of climate change in East Africa during the Mid-Pleistocene Transition (MPT); (2) What is the role of orbital forcing on East African humidity? (3) What is the internal variability of the wet episode documented in the Suguta Valley and elsewhere in East Africa? (4) What are the faunal responses to the environmental changes in Suguta Valley and the adjacent basins? (5) How can the history of those conditions be related to evolutionary processes and events in hominin species? This investigation of the Mid Pleistocene climate and environmental change in East Africa in concert with the analysis of the tectonic evolution of the lake basins at that time will significantly benefit from our expanded knowledge about the timing, internal variability and causes of dry-wet-dry cycles such as the African Humid Period.

我们建议进行最后一周的考察，以调查肯尼亚北部偏远的苏古塔山谷的新生代晚期结构清单和湖泊历史。该项目的基本目标是：定义湖泊古气候档案的结构边界条件并利用湖泊沉积物破译古环境历史。在完成结构测绘和山谷中全新世湖泊沉积物调查后，该项目最后阶段的目标（特别是中更新世）是：（1）中更新世过渡（MPT）期间东非气候变化的特征是什么； (2) 轨道强迫对东非湿度的作用是什么？ (3) 苏古塔山谷和东非其他地方记录的潮湿事件的内部变化是什么？（4）苏古塔河谷及邻近流域的动物区系对环境变化有何反应？ (5) 这些条件的历史如何与古人类物种的进化过程和事件相关？这项对东非中更新世气候和环境变化的调查，以及对当时湖盆构造演化的分析，将大大受益于我们对非洲湿润期等干湿循环的时间、内部变化和原因的扩展了解。