Development of Quantitative Weathering Indicators in Proximal Alluvial Sediments to Assess Glacial Activity in the Rock Record

开发近端冲积沉积物定量风化指标以评估岩石记录中的冰川活动

• 批准号: 0842639
• 负责人: Gerilyn Soreghan
• 金额: $ 7.31万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-15 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0842639&HistoricalAwards=false
• 关键词: Development; Quantitative; Weathering; Indicators; Proximal

The proposed research seeks to test the hypothesis that chemical and physical weathering in proximal alluvial systems will show systematic and measurable variations between glacial and nonglacial systems. To accomplish this, the investigation will attempt to quantify the natural variation of chemical and physical weathering in granitoid-sourced proximal alluvial sediments in end-member glacial and nonglacial systems, when other, "non-climatic" factors (e.g. provenance, drainage basin area and relief, sample grain size, sediment facies) are controlled. If chemical weathering in the proposed hot-humid, hot-arid, hot semi-arid nonglacial systems and the cool-wet, cold semi-arid, and cold-arid glacial systems show systematic variations, then chemical indices may be used to help differentiate paleoclimatic conditions. Continued reliance on students provides a broader impact of this proposed research and firmly grounds this effort in its educational mission.

拟议的研究旨在测试的假设，化学和物理风化在近端冲积系统将显示系统和可测量的变化之间的冰川和非冰川系统。为了实现这一点，调查将试图量化的自然变化的化学和物理风化花岗岩源近端冲积沉积物在端元冰川和非冰川系统，当其他“非气候”因素（如物源，流域盆地面积和救济，样品粒度，沉积相）的控制。如果化学风化在拟议的热湿，热干旱，热半干旱非冰川系统和冷湿，冷半干旱，冷干旱冰川系统显示出系统的变化，那么化学指标可以用来帮助区分古气候条件。对学生的持续依赖为这项拟议的研究提供了更广泛的影响，并在其教育使命中为这项努力奠定了坚实的基础。