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; 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.

拟议的研究试图检验以下假设：近端冲积系统中的化学和物理风化将显示冰川和非冰川系统之间的系统和可测量变化。为此，调查将尝试量化花岗岩产生的化学和物理风化的自然变化，而当其他“非气候”因素（例如，出处，排水盆地和救援，样品谷物尺寸，沉积物面孔）的其他“非气候”因素（例如，其他“非气候”因素）是控制的。如果在拟议的热水，热疗法，热半干旱非冰河系统以及凉爽，冷的半干旱和冷冰原系统中进行化学风化，则可以使用化学指数来帮助区分古气候条件。持续依赖学生对这项拟议的研究产生了更广泛的影响，并在其教育任务中坚定了这一努力。