U.S.-France Collaborative Study of the Alteration of Ancient Stromatolites: New Insights through Coupled Petrology and Isotope Geochemistry
美法合作研究古代叠层石的蚀变:通过耦合岩石学和同位素地球化学获得新见解
基本信息
- 批准号:1404389
- 负责人:
- 金额:$ 2.97万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-06-15 至 2016-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
a non-technical explanation Stromatolites, the macrofossil evidence of microbial activity, are an important biosignature in the search for life on early Earth and in extraterrestrial missions. Although it has become increasingly important to place value on organic biomarkers to define a record of past life, stromatolites remain the most readily visible microbial macrofossil. Yet, the taphonomic effect of diagenesis and metamorphism on stromatolites is poorly known, hampering their utility as a faithful recorder of past life.The project proposes to develop a new collaboration to describe and quantify the effects of contact and regional metamorphism and fluid-induced diagenetic changes on biogenic stromatolite beds of the 1,878 Ma Biwabik-Gunflint iron formations of the Lake Superior region. This target has been chosen because it offers a phenomenal natural laboratory setting that is accessible, samples can be carefully and accurately plotted in a three-dimensional framework, and the geologic history is complex and covers several divergent taphonomic pathways. The full study will be significant to researchers studying paleontological and biogeochemical patterns in other altered sediments both on early Earth and extraterrestrial targets. The research will provide critical primary research experience for two undergraduate students at a primarily undergraduate institution, enhancing their careers with opportunities not available at their host institution. The teaching methods of the PI will be enhanced with a greater understanding of coupled petrologic and geochemical information. Most critically, by creating a new collaboration, there will develop additional opportunities for interdisciplinary project-based learning which forms an integral component of the PI?s pedagogy.a technical description The focus of this CNIC proposal is to work in a world-class laboratory at the Université of Brest, France. During this visit, the new collaborative team will analyze samples for iron isotope and trace element geochemical proxies that will integrate with the PI?s extensive database on mineralogic and petrographic changes throughout the metamorphic gradient of a biogenic stromatolite layer. This specific collaboration will both complement and challenge previous research on the geochemical imprint of iron formations and the preservation of original geobiochemical signatures in ancient fossil deposits. The implications will be of major importance to researchers in fields as diverse as astrobiology, geochemistry, mineralogy, economic geology, and paleobiology.
一个非技术性的解释Stromatalum,微生物活动的宏化石证据,是在早期地球上寻找生命和外星任务的重要生物标志。虽然它已经变得越来越重要,把有机生物标志物的价值,以确定过去的生活记录,叠层石仍然是最容易看到的微生物宏化石。然而,成岩作用和变质作用对叠层石的埋藏作用知之甚少,妨碍了它们作为过去生命的忠实记录者的效用。该项目建议开展一项新的合作,以描述和量化接触和区域变质作用以及流体引起的成岩作用对苏必利尔湖上级地区1,878 Ma Biwabik-Gunflint铁地层的生物叠层石床的影响。之所以选择这个目标,是因为它提供了一个可访问的惊人的自然实验室环境,可以在三维框架中仔细准确地绘制样品,地质历史复杂,涵盖了几个不同的埋藏路径。完整的研究将对研究早期地球和外星目标上其他蚀变沉积物中的古生物学和地球化学模式的研究人员具有重要意义。该研究将为两名本科生在一个主要的本科院校提供关键的主要研究经验,提高他们的职业生涯与机会在他们的主办机构不可用。PI的教学方法将随着对耦合岩石学和地球化学信息的更好理解而得到加强。最重要的是,通过建立一个新的合作,将有发展跨学科的项目为基础的学习,形成了PI的一个组成部分的额外的机会?a技术说明CNIC的这一建议的重点是在法国布雷斯特大学的世界级实验室工作。在这次访问期间,新的合作小组将分析样品的铁同位素和微量元素地球化学代理,将与PI?的广泛的数据库矿物学和岩相学的变化,整个变质梯度的生物叠层石层。这项具体的合作将补充和挑战以前关于铁形成的地球化学印记和保存古代化石矿床中原始地球生物化学特征的研究。这些影响对天体生物学、地球化学、矿物学、经济地质学和古生物学等不同领域的研究人员都具有重要意义。
项目成果
期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
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Russell Shapiro其他文献
Dimerelloid brachiopod Dzieduszyckia from Famennian hydrocarbon seep deposits of Slaven Chert, Nevada, USA, with insights into systematics and paleoecology of the Dimerelloidea
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- 影响因子:0
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Russell Shapiro - 通讯作者:
Russell Shapiro
Russell Shapiro的其他文献
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{{ truncateString('Russell Shapiro', 18)}}的其他基金
MRI: Acquisition of a Scanning Electron Microscope with Energy Dispersive Spectrometry for Collaborative Research in Geobiology
MRI:获取具有能量色散光谱测量功能的扫描电子显微镜,用于地球生物学的合作研究
- 批准号:
1532226 - 财政年份:2015
- 资助金额:
$ 2.97万 - 项目类别:
Standard Grant
Development of a High-Resolution Stromatolite Facies Model: Environmental Impacts at the Dawn of Oxygenation
高分辨率叠层石相模型的开发:氧化初期的环境影响
- 批准号:
1251422 - 财政年份:2013
- 资助金额:
$ 2.97万 - 项目类别:
Standard Grant
C-RUI: Geomicrobial Processes in an Ancient Methane Seep Deposit: Resolving Temporal and Spatial Shifts in Localized Microbial Ecosystems
C-RUI:古代甲烷渗漏沉积物中的地球微生物过程:解决局部微生物生态系统的时空变化
- 批准号:
0650657 - 财政年份:2006
- 资助金额:
$ 2.97万 - 项目类别:
Standard Grant
C-RUI: Geomicrobial Processes in an Ancient Methane Seep Deposit: Resolving Temporal and Spatial Shifts in Localized Microbial Ecosystems
C-RUI:古代甲烷渗漏沉积物中的地球微生物过程:解决局部微生物生态系统的时空变化
- 批准号:
0433917 - 财政年份:2004
- 资助金额:
$ 2.97万 - 项目类别:
Standard Grant
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