Quaternary Marine Stratigraphy and Sedimentology of Chilean Fiords and Continental Shelf, Western Patagonia

智利峡湾和大陆架、西巴塔哥尼亚第四纪海洋地层学和沉积学

• 批准号: 9119194
• 负责人: Jay Stravers
• 金额: $ 20.41万
• 依托单位: Northern Illinois University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1997-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119194&HistoricalAwards=false
• 关键词: Quaternary; Marine; Stratigraphy; Sedimentology; Chilean

This award supports two marine geological cruises to the fjords and continental shelf of southern Chile. Research will concentrate on the collection and analysis of single channel seismic reflection data, 3.5 KHz profiler data, and piston cores. This work will examine fundamental questions concerning the dynamics of the Patagonian ice sheet during the late Wisconsin glaciation and how it responded to changing marine and terrestrial climate during the last glacial/interglacial transition. This project represents an extension of current investigations into the marine geology of the Antarctic Peninsula to include glacial marine environments from a wider latitudinal range. In order to enhance the applicability of litho and seismo- stratigraphic studies to a broader range of Quaternary science, this research will be conducted in cooperation with other researchers investigating marine and terrestrial paleoclimate. Down core changes in micro-flora (diatoms) and micro-fauna will be examined in conjunction with geochemical and isotopic analyses. Palynological studies of some cores will be undertaken in an attempt to refine our misunderstanding of the relationship between terrestrial and marine paleoclimates. The project will also be undertaken in cooperation with Chilean researchers who are interested in the sedimentary and tectonic history of the region. By extending the marine studies of the Antarctic Peninsula to Patagonia, and by broadening their scope to include land-sea correlations, valuable insight will be gained into spatial and temporal changes on climate along a broad range of latitudes.

该奖项支持两艘前往智利南部峡湾和大陆架的海洋地质邮轮。研究将集中于收集和分析单通道地震反射数据、3.5 kHz剖面仪数据和活塞岩心。这项工作将审查有关威斯康星州冰川晚期巴塔哥尼亚冰盖的动力学以及它如何应对上一次冰川/间冰期过渡期间不断变化的海洋和陆地气候的基本问题。该项目是目前对南极半岛海洋地质调查的延伸，包括更大纬度范围内的冰川海洋环境。为了加强岩石学和地震地层学研究对更广泛的第四纪科学的适用性，这项研究将与调查海洋和陆地古气候的其他研究人员合作进行。将结合地球化学和同位素分析研究微型植物(硅藻)和微型动物的向下核心变化。将对一些岩心进行孢粉学研究，试图改善我们对陆地和海洋古气候之间关系的误解。该项目还将与智利研究人员合作开展，他们对该地区的沉积和构造史感兴趣。通过将南极半岛的海洋研究扩展到巴塔哥尼亚，并通过扩大其范围以包括海陆关系，将获得对广泛纬度地区气候的空间和时间变化的宝贵见解。