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

这是一个综合的火山学，沉积学，地球化学和地质年代学研究的镁铁质和中-白垩纪冰川火山和冰川沉积物从Edziza火山杂岩（EVC），在北方不列颠哥伦比亚省，加拿大既限制在该地区的变化，更新世冰条件和开发的方法，使用这样一个多学科的研究作为一个代理在世界其他地方的古冰条件/古气候。 该项目将开发一种方法，其基础是综合冰川火山和冰川生成相分析、火山玻璃挥发性和氢同位素分析以及精确的40 Ar/39 Ar地质年代学数据集，可用于限制不列颠哥伦比亚省和许多其他冰川火山地区，如喀斯喀特山脉、安第斯山脉、冰岛、南极洲西部和西伯利亚的更新世冰况。 不列颠哥伦比亚省中北部是了解科迪勒拉冰盖动态的一个关键地区，因为模型表明，在末次冰盛期，这一地区靠近科迪勒拉冰盖的中部和最厚的部分，也位于沿着一个主要的冰分水岭。 镁铁质冰川火山作用的过程和产物有很好的文献记载，但中-晚冰期冰川火山作用的过程和产物却鲜为人知。 这个项目将大大增加我们对这种火山-冰相互作用的理解。 对地球上火山-冰相互作用的研究还有助于我们了解火星上岩浆-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。

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.