Collaborative Research: EAR-Climate: Linkages Between Glacio-climatic, Hydrothermal, and Volcanic Processes in the Central Andes

合作研究：EAR-气候：安第斯山脉中部冰川气候、热液和火山过程之间的联系

• 批准号: 2143533
• 负责人: Jonathan Baker
• 金额: $ 32.94万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2143533&HistoricalAwards=false
• 关键词: Collaborative; Research; EAR; Climate; Linkages

While volcanic and hydrological responses to glacial activity have been documented around the globe, the response of hydrothermal systems remains largely unstudied. Important questions to be addressed include: How do hydrological, hydrothermal and/or volcanic systems respond to climate change and glacier expansion and retreat? What are the timing and mechanisms that control these responses? Answering these questions has significant impacts on hazard assessments (phreatic eruptions and hydrothermal explosions), geothermal exploration, and mineral deposits. El Tatio volcanic-hydrothermal system, Central Andes, provides an ideal natural laboratory to investigate these interactions. El Tatio has been active since the last deglaciation and preserves exceptional morpho-stratigraphic evidence of volcanic, glacial, and hydrothermal activity. Unlike past studies, focusing on large continental ice masses during the Last Glacial Maximum, El Tatio experienced smaller alpine or mountain glaciations. That configuration is more representative of the world-wide distribution of glaciers and the processes occurring due to modern climate change. Led by an early career Latino-woman, this project will intensify collaborations with Chilean Universities, and will engage historically marginalized native communities who own the land.This project will use an interdisciplinary approach that brings together experts from different US institutions and Chile, which propose to address the following: (i) to establish spatial and temporal linkages between glacier fluctuations including deglaciation and the onset of hydrothermal and/or volcanic activity by constraining the field distribution and timing of different events; and (ii) to make quantitative estimation of the hydrothermal responses to glacial unloading, changes in water and heat supply using field data (ages and estimation of ice thickness) and numerical models of multiphase flow and deformation in heterogeneous porous media. Results from this study will provide a better understanding of the interrelated and competing controls of hydrothermal responses (for example, glacier distribution, thickness, and rates of advance/recession; rheology; permeability; and reservoir depth).This project is jointly funded by the Hydrologic Sciences Program, the Geomorphology and Land Use Dynamics Program, and the Petrology and Geochemistry Program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

尽管全球各地都记录了火山和水文对冰川活动的反应，但热液系统的反应在很大程度上仍未得到研究。需要解决的重要问题包括：水文、热液和/或火山系统如何应对气候变化和冰川扩张和退缩？控制这些反应的时间和机制是什么？回答这些问题对灾害评估（潜水喷发和热液爆炸）、地热勘探和矿藏具有重大影响。安第斯山脉中部的埃尔塔蒂奥火山热液系统为研究这些相互作用提供了理想的自然实验室。埃尔塔蒂奥自上次冰消期以来一直很活跃，并保留了火山、冰川和热液活动的特殊地貌地层证据。过去的研究主要关注末次盛冰期期间的大型大陆冰块，与此不同的是，埃尔塔蒂奥经历了较小的高山或山地冰川作用。这种结构更能代表全球范围内的冰川分布以及现代气候变化造成的过程。该项目由一位早期职业拉丁裔女性领导，将加强与智利大学的合作，并将吸引拥有土地的历史上边缘化的土著社区。该项目将采用跨学科方法，汇集来自美国不同机构和智利的专家，其中建议解决以下问题：㈠ 通过限制不同事件的现场分布和时间，建立冰川波动（包括冰川消融）与热液和/或火山活动爆发之间的空间和时间联系； (ii) 利用现场数据（冰龄和冰厚度估计）以及非均质多孔介质中多相流和变形的数值模型，对冰川卸荷、水和供热变化的热液响应进行定量估计。这项研究的结果将有助于更好地理解热液响应的相互关联和相互竞争的控制（例如，冰川分布、厚度和前进/后退速率；流变学；渗透率；和储层深度）。该项目由水文科学项目、地貌学和土地利用动力学项目以及岩石学和地球化学项目。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Environmental and Hydrogeochemical Controls of Spicular Geyserite in Opaline Hot Spring Deposits

蛋白石温泉矿床中针状辉沸石的环境和水文地球化学控制

• DOI: 10.1029/2022ea002645
• 发表时间: 2023
• 期刊: Earth and Space Science
• 影响因子: 3.1
• 作者: Munoz‐Saez, C.;Gong, J.;Perez‐Fodich, A.;van Zuilen, M. A.
• 通讯作者: van Zuilen, M. A.