Deconvolving Magmatic, Crustal and Atmospheric Gases in Yellowstone using a Coupled Noble Gas and Nitrogen Isotope Approach

使用耦合稀有气体和氮同位素方法对黄石公园的岩浆、地壳和大气气体进行反卷积

• 批准号: 2151120
• 负责人: Peter Barry
• 金额: $ 59万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2151120&HistoricalAwards=false
• 关键词: Deconvolving; Magmatic; Crustal; Atmospheric; Gases

The Earth’s surface is rich in volatile elements (e.g., H, C, N), providing the unique conditions that sustain life on our planet. However, the origin of terrestrial volatiles remains enigmatic, with considerable debate and uncertainty surrounding regarding volatile source(s) and the overall timing of planetary accretion. Analyzing the composition of primordial gases emanating from Earth's mantle represents one of the best avenues to determine the origin of terrestrial volatiles. The Yellowstone–Columbia River volcanic mega-province is one of the few volcanic localities on Earth where pristine, plume-derived magmatic gas reaches the surface and can be easily collected for analysis. Geochemical data from previous studies in Yellowstone suggest that gas vents are sourced from a deep-seated mantle plume, that is dominantly chondritic in origin. In this project, a comprehensive study of gas emissions from Yellowstone National Park (YNP) will be conducted. The aims are to: (i) investigate the nature and extent of the Yellowstone plume's interaction with the Archean-aged crustal basement, which will provide further insight into (ii) the source of the YNP plume, and the (iii) processes acting to obfuscate mantle source signals. Specifically, the proposed research will constrain the composition of YNP magmatic gases and their parental plume mantle source with unprecedented spatial and analytical resolution. The PIs will employ static noble gas mass spectrometry techniques, clumped N isotope measurements and the first ultra-high-precision (sub per mil (‰) precision) dynamic mass spectrometry measurements of magmatic gas to deconvolve mantle, crustal and atmospheric endmembers and to place firmer constraints on the origin of volatiles in the Yellowstone plume, which will help pinpoint the origin of volatiles on Earth. Questions pertaining to the origin of volatiles on Earth are of broad interest to the scientific community. Results from this study will provide insight into the relationship between mantle volatiles and Earth’s atmospheric composition, which is of direct relevance to understanding the drivers of Earth’s habitability and the subsequent evolution of life. Findings will be communicated to the scientific community through peer-reviewed publications and to the public through a multi-faceted outreach approach, including newsletter publications and field-based lectures that will be simulcast as a Facebook Live Event in coordination with YNP rangers. Further, the PIs will work with the YNP Exhibits Specialist to incorporate geochemical findings from this and other studies into a permanent “wayside exhibit” within the park. If possible, a short geochemical synopsis will also be included in the YNP welcome packet (distributed to the 4 million annual visitors). Additionally, an interactive website presenting a “Yellowstone Geochemical Trail Map.” will also be constructed and linked to the aforementioned wayside exhibit and entry brochure.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.

地球表面富含挥发性元素（例如H，C，N），提供了在我们地球上维持生命的独特条件。然而，陆地挥发物的起源仍然是神秘的，关于挥发性来源的考虑和不确定性以及行星积聚的整体时间安排。分析地球地幔产生的原始气体的组成是确定陆地挥发物起源的最佳途径之一。黄石 - 哥伦比亚河火山巨型巨星是地球上为数不多的火山区域之一，原始的，羽流的岩浆气体到达地面，可以轻松收集以进行分析。黄石以前研究的地球化学数据表明，气体通风孔来自座位上的深层地幔羽流，这在起源上是主要的软骨。在该项目中，将对黄石国家公园（YNP）的气体排放进行全面研究。目的是：（i）研究黄石羽流与大古老的地下地下室相互作用的性质和程度，该地下室将进一步了解（ii）YNP羽流的来源，以及（III）过程以混淆粘合厚度源信号。具体而言，拟议的研究将限制具有前所未有的空间和分析分辨率的YNP岩浆气体及其父母羽流源的组成。 PI将采用静态贵重气体质谱技术，聚集的N同位素测量以及第一个超高准则（sub sub sub（sub sub sub（‰）精度）动态质谱测量到岩浆气体对磁化，覆盖甲板，外壳和大气的固件上的固定的固定在北极固定的范围上的闪光，并将其固定在闪光上的范围，并将其定位在北段上，以使固定在闪烁上，以弥补闪光的范围。 地球。与地球上挥发物的起源有关的问题对科学界引起了广泛的关注。这项研究的结果将洞悉地幔挥发物与地球大气组成之间的关系，这与了解地球的居住能力的驱动力以及随后的生命进化是直接相关的。调查结果将通过同行评审的出版物和公众通过多方面的外展方法传达给科学界，包括新闻通讯出版物和基于现场的讲座，这些讲座将作为Facebook直播，与YNP Rangers协调。此外，PIS将与YNP展览专家合作，将这项研究和其他研究的地球化学发现纳入公园内的永久“路边展览”。如果可能的话，YNP欢迎数据包（分发给400万访客）也将包括一个简短的地球化学摘要。此外，一个交互式网站上呈现“黄石地球化学步道图”。该奖项也将与后来的出口和入境手册相关联。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响标准，被视为通过评估而被视为珍贵的支持。