Collaborative Research: Stable strontium isotope ratios (88/86Sr) in abiotic and microbially mediated barite

合作研究：非生物和微生物介导的重晶石中的稳定锶同位素比率 (88/86Sr)

• 批准号: 1053312
• 负责人: Elizabeth Griffith
• 金额: $ 14.22万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-03-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1053312&HistoricalAwards=false
• 关键词: Collaborative; Research; Stable; strontium; isotope

Results from the proposed research will generate novel isotope measurements from barite, a highly stable and widely-distributed mineral found in magmatic, metamorphic, and sedimentary rocks of all ages, as well as in soils, aerosol dust, and extraterrestrial material. Establishing the controlling parameters of stable Sr-isotopic fractionation in barite will open a new avenue for geological and environmental research including geochemical, hydrogeological, hydrothermal, and paleoenvironmental studies. This fundamental research will lay the groundwork for future studies in the earth sciences using measurements of mass dependent Sr isotopes in barite. Barite may be an ideal vehicle to address critical questions in the earth sciences, including early earth biogeochemistry, evidence of potential life in extraterrestrial samples, reconstruction of temperatures in formation fluids such as springs and seeps, water rock interactions, tracking provenances of atmospheric inputs into soils, and reconstructing global changes in Sr2+ budgets during earth?s past.Very few laboratories in the world have developed methods to measure stable Sr-isotope ratios; and work on this new stable isotopic system proposed here will provide a unique opportunity to contribute to the development of this new isotope system in its beginning stages. Graduate and undergraduate students will have the opportunity to work and interact in multiple laboratories on this research project (at Kent State Univ., USC, Univ. of Akron, UCLA, Univ. of Oklahoma) thus developing and mentoring research and analytical skills. They will conduct careful experiments, collect samples in the field at an established field site in western Oklahoma and interact with students involved in this project as well as field sites in western Colorado and northern Utah. Outreach activities in local high schools will be established through a published hands-on learning module which investigates fundamental concepts of the ?greenhouse effect? and will employ our current geology students to visit their old high schools and relay their excitement for the geosciences as a future career.

拟议的研究的结果将产生Barite的新型同位素测量，这是一种高度稳定且分布广泛的矿物，在岩浆，变质和所有年龄段的沉积岩中，以及土壤，气溶胶粉尘和外星材料中发现。在Barite中建立稳定的SR-同位素分馏的控制参数将为地质和环境研究开辟新的途径，包括地球化学，水文学，水热和古环境研究。这项基本研究将使用Barite中质量依赖的SR同位素的测量来为地球科学的未来研究奠定基础。 Barite may be an ideal vehicle to address critical questions in the earth sciences, including early earth biogeochemistry, evidence of potential life in extraterrestrial samples, reconstruction of temperatures in formation fluids such as springs and seeps, water rock interactions, tracking provenances of atmospheric inputs into soils, and reconstructing global changes in Sr2+ budgets during earth?s past.Very few laboratories in the world have developed methods to measure稳定的SR同位素比；在此提出的这个新的稳定同位素系统上的工作将为在起始阶段开发这种新的同位素系统的开发提供独特的机会。毕业生和本科生将有机会在该研究项目的多个实验室（在肯特州立大学，USC，UCLA。，UCLA，UCLA，UCLA，UCLA。）在多个实验室工作和互动，从而发展和指导研究和分析技能。他们将进行仔细的实验​​，在俄克拉荷马州西部既定地现场的现场收集样品，并与参与该项目的学生以及西科罗拉多州西部和犹他州北部的现场互动。将通过出版的动手学习模块来建立当地高中的外展活动，该模块研究了“温室效应的基本概念”？并将聘请我们当前的地质学生参观他们的旧高中，并将对地球科学的兴奋转移为未来的职业。