CAREER: Developing New Methodologies to Investigate the Thermal, Tectonic, and Climatic History of Continental Settings - An Integrated Educational and Research Project
职业:开发新方法来研究大陆环境的热、构造和气候历史 - 一个综合教育和研究项目
基本信息
- 批准号:0545071
- 负责人:
- 金额:$ 45.11万
- 依托单位:
- 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:2006-04-15 至 2012-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
For over two decades it has been assumed that transport properties for both heat and helium are similar in the crust and that transport for both tracers is in steady-state. In addition, the presence of a terrestrial helium-heat imbalance was suggested based on the observed low mantle He/heat flux ratio at the proximity of mid-ocean ridges. Recent work, however, indicates that the driving transport mechanisms for these two tracers are of a fundamentally different nature for a high range of rock permeabilities in the crust. It was concluded that low He/heat flux ratios in a steady-state regime do not reflect a He deficit in the crust or mantle original reservoirs, but rather, the combined impact of air saturated water, advection, conduction, and diffusion. Together with other noble gas measurements and determined noble gas temperatures (NGTs), part I of the proposed work will take advantage of these recent findings to test and develop the newly created He/heat flux tracer to identify the occurrence, both in time and space, of tectonothermal events in continental regions, and in the Michigan Basin in particular. Part II will take advantage of common tools in order to address questions in relation to NGT determination in ice-covered regions. The latter is a direct measure of the temperature at which groundwater equilibrated with the atmosphere during infiltration and offer a unique opportunity to improve our understanding of past climate in continental areas as well as to assess the impact of glaciation on groundwater recharge in mid-high latitude regions. In addition to illustrating how He/heat flux ratios can be used in conjunction with NGTs to investigate the tectonothermal history of continental regions, this work will also contribute to an improved understanding of NGT determination in ice-covered regions. This work will impact knowledge in the fields of Mantle Geochemistry, Geophysics, Structural Geology, Hydrology and Paleoclimatology.This research will be the basis of a new, exclusively research-oriented undergraduate course. Identifying problems to be addressed, collecting and analyzing data, testing hypotheses, reaching potential conclusions and writing the prototype of a scientific paper will be an integral part of this class. Of particular relevance is the participation of undergraduate non-science majors, in particular women and underrepresented groups into scientific discovery, which is expected to captivate students and ultimately draw increasing numbers into a scientific career.
二十多年来,人们一直认为热量和氦在地壳中的传输特性是相似的,并且两种示踪剂的传输都处于稳态。此外,根据在大洋中脊附近观测到的低地幔氦/热通量比,提出了陆地氦热不平衡的存在。然而,最近的工作表明,这两种示踪剂的驱动传输机制是一个根本不同的性质为高范围的岩石渗透率在地壳中。得出的结论是,低的He/热通量比在稳态制度不反映他赤字在地壳或地幔原始水库,而是,空气饱和水,平流,传导和扩散的综合影响。连同其他惰性气体测量和确定的惰性气体温度(NGTs),拟议工作的第一部分将利用这些最新的发现来测试和开发新创建的He/热通量示踪剂,以确定大陆地区,特别是密歇根盆地的构造活动在时间和空间上的发生。第二部分将利用共同的工具,以解决有关的问题NGT确定在冰雪覆盖的地区。后者是一个直接测量的温度时,地下水与大气在渗透过程中达到平衡,并提供了一个独特的机会,以提高我们对过去的气候在大陆地区的理解,以及评估冰川作用对地下水补给的影响在中高纬度地区。 除了说明如何他/热通量比可以与NGTs一起使用,以调查大陆地区的构造历史,这项工作也将有助于更好地了解NGT确定在冰覆盖的地区。这项工作将影响地幔地球化学,地球物理学,结构地质学,水文学和古气候学领域的知识。这项研究将是一个新的,完全以研究为导向的本科课程的基础。确定要解决的问题,收集和分析数据,测试假设,得出潜在的结论和撰写科学论文的原型将是本课程不可或缺的一部分。特别重要的是,非理科专业的本科生,特别是妇女和代表性不足的群体参与科学发现,预计这将吸引学生,并最终吸引越来越多的人从事科学职业。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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M. Clara Castro其他文献
Noble gas signatures in snow
- DOI:
10.1016/j.chemgeo.2018.02.022 - 发表时间:
2018-04-20 - 期刊:
- 影响因子:
- 作者:
Julien Amalberti;Chris M. Hall;M. Clara Castro - 通讯作者:
M. Clara Castro
Magmatic and rock-leaching contributions to the metal load in hydrothermal fluids at þeistareykir, Iceland
- DOI:
10.1016/j.apgeochem.2024.106213 - 发表时间:
2024-12-01 - 期刊:
- 影响因子:
- 作者:
Marion Saby;Vincent van Hinsberg;Daniele L. Pinti;Kim Berlo;Bjarni Gautason;Ásgerður Sigurðardóttir;M. Clara Castro - 通讯作者:
M. Clara Castro
<sup>3</sup>H/<sup>3</sup>He, <sup>14</sup>C and (U–Th)/He groundwater ages in the St. Lawrence Lowlands, Quebec, Eastern Canada
- DOI:
10.1016/j.chemgeo.2015.08.003 - 发表时间:
2015-10-15 - 期刊:
- 影响因子:
- 作者:
Geneviève Vautour;Daniele L. Pinti;Pauline Méjean;Marion Saby;Guillaume Meyzonnat;Marie Larocque;M. Clara Castro;Chris M. Hall;Christine Boucher;Emilie Roulleau;Florent Barbecot;Naoto Takahata;Yuji Sano - 通讯作者:
Yuji Sano
M. Clara Castro的其他文献
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{{ truncateString('M. Clara Castro', 18)}}的其他基金
Development of Noble Gases as Tracers of Groundwater Circulation in Fractured and Karstic Systems
开发稀有气体作为裂缝和岩溶系统地下水循环示踪剂
- 批准号:
1344357 - 财政年份:2014
- 资助金额:
$ 45.11万 - 项目类别:
Continuing Grant
Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases
基于稀有气体为极地和高山冰川地区开发新的古气候代理
- 批准号:
1245580 - 财政年份:2012
- 资助金额:
$ 45.11万 - 项目类别:
Standard Grant
Acquisition of a new noble gas mass spectrometer and extraction system for the University of Michigan
为密歇根大学采购新型惰性气体质谱仪和萃取系统
- 批准号:
1049822 - 财政年份:2012
- 资助金额:
$ 45.11万 - 项目类别:
Continuing Grant
Using He as a Natural Tracer to Understand the Dynamics of Groundwater Systems: A Quantitative Approach
使用 He 作为自然示踪剂来了解地下水系统的动态:一种定量方法
- 批准号:
0308707 - 财政年份:2003
- 资助金额:
$ 45.11万 - 项目类别:
Continuing Grant
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