Collaborative Research: Using the Products of Volcano-Ice Interaction to Constrain Paleo-Ice Conditions

合作研究：利用火山-冰相互作用的产物来限制古冰条件

• 批准号: 0439707
• 负责人: Benjamin Edwards
• 金额: $ 15.57万
• 依托单位: Dickinson College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-01-15 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0439707&HistoricalAwards=false
• 关键词: Collaborative; Research; Using; Products; Volcano

This is an integrated volcanological, sedimentological, geochemical and geochronological study of mafic and intermediate-silicic glaciovolcanic and glacial deposits from the Edziza Volcanic Complex (EVC), in northern British Columbia, Canada to both constrain variations in Pleistocene ice conditions in this region and to develop the methodology of using such a multi-disciplinary study as a proxy for paleo-ice conditions/paleoclimate elsewhere in the world. This project will develop a methodology based on integrating datasets from glaciovolcanic and glaciogenic facies analysis, volatile and H-isotope analysis of volcanic glass, and precise 40Ar/39Ar geochronology that could be used to constrain Pleistocene ice conditions in British Columbia, and in many other glaciated volcanic areas, such as the Cascades, the Andes, Iceland, west Antarctica and Siberia. North-central British Columbia is a key area for understanding the dynamics of the Cordilleran Ice Sheet (CIS), as models suggest that this area lay close to the central and thickest part of the CIS during the Last Glacial Maximum and was also located along a major ice divide. The processes and products of mafic glaciovolcanism are well documented, but those of intermediate-silicic glaciovolcanism are much less well known. This project will significantly increase our understanding of this style of volcano-ice interaction. Studies of volcano-ice interaction on Earth also help our understanding of deposits and edifices generated by magma-ice interaction on Mars, which are recognized as significant astrobiological targets.

这是对加拿大不列颠哥伦比亚省北部埃齐扎火山群 (EVC) 的镁铁质和中硅质冰川火山和冰川沉积物进行的综合火山学、沉积学、地球化学和地质年代学研究，旨在限制该地区更新世冰条件的变化，并开发使用这种多学科研究作为世界其他地方古冰条件/古气候代理的方法。 该项目将开发一种基于冰川火山相和冰川成因相分析、火山玻璃挥发物和 H 同位素分析以及精确 40Ar/39Ar 地质年代学数据集的方法，可用于限制不列颠哥伦比亚省和许多其他地区的更新世冰条件。冰川火山地区，如喀斯喀特山脉、安第斯山脉、冰岛、南极洲西部和西伯利亚。 不列颠哥伦比亚省中北部是了解科迪勒拉冰盖 (CIS) 动态的关键区域，因为模型表明该区域在末次盛冰期期间靠近 CIS 的中心和最厚的部分，并且也位于主要冰分水岭。 镁铁质冰川火山作用的过程和产物已有详细记载，但中硅质冰川火山作用的过程和产物却鲜为人知。 该项目将显着增加我们对这种火山与冰相互作用的理解。 对地球上火山与冰相互作用的研究也有助于我们了解火星上岩浆与冰相互作用产生的沉积物和建筑物，这些沉积物和建筑物被认为是重要的天体生物学目标。