Acquisition of a 193 nm excimer laser ablation system and optical profiler for in situ (U-Th)/He and U-Pb geochronology and thermochronology at the University of Colorado Boulder

科罗拉多大学博尔德分校购置 193 nm 准分子激光烧蚀系统和光学剖面仪，用于原位 (U-Th)/He 和 U-Pb 地质年代学和热年代学

• 批准号: 1920648
• 负责人: Rebecca Flowers
• 金额: $ 49.96万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2023-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1920648&HistoricalAwards=false
• 关键词: Acquisition; 193; nm; excimer; laser

The core missions of the CU TRaIL (University of Colorado Boulder - Thermochronology Research and Instrumentation Lab) are to foster innovative, interdisciplinary, and high-caliber research while also providing geochronology data and training to the broader Earth science community. This project will acquire three pieces of instrumentation that will add new high-spatial resolution capabilities to the CU TRaIL. This equipment will diversify the services that the lab offers, expand the opportunities that it provides to visitors, and enrich an array of ongoing research that includes studies of landscape evolution and topographic development, work on lunar rocks to decipher the impact history of the Moon, and investigations in ancient rocks to constrain development of the "Great Unconformity" and links with biologic change. The project includes support for an underrepresented undergraduate summer intern, an undergraduate research seminar, and three undergraduate research projects.This project will acquire: 1) an excimer laser-ablation system, 2) hardware to build a quadrupole He line dedicated to in situ He analysis, and 3) an optical profiler. The equipment will advance the lab?s research and that of its user community by enabling in situ (U-Th)/He dating, U-Th and He mapping of single crystals, U-Pb dating, and in situ measurements and mapping of other elements. These new capabilities will allow: 1) rapid sample screening for strategic mineral selection, 2) quantification of intracrystalline heterogeneities, 3) direct measurement of diffusion gradients in single crystals, 4) chemical characterization, 5) dating of imperfect and small crystals, 6) largely non-destructive analysis of high-value samples, 7) avoidance of U loss that can occur during conventional whole-crystal heating, 8) more efficient analysis of higher-retentivity phases, 9) possible increased throughput for detrital investigations, and 10) in situ U-Pb and (U-Th)/He double-dating. The project includes support for an underrepresented undergraduate summer intern, an undergraduate research seminar, and three undergraduate research projects.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.

科罗拉多大学TRAIL(科罗拉多大学博尔德分校-热年代学研究和仪器实验室)的核心任务是促进创新、跨学科和高水平的研究，同时也向更广泛的地球科学界提供地质年代学数据和培训。该项目将获得三件仪器，这些仪器将为CU轨迹添加新的高空间分辨率能力。该设备将使该实验室提供的服务多样化，扩大它为参观者提供的机会，并丰富一系列正在进行的研究，包括景观演变和地形发展的研究，对月球岩石进行破译的工作，以及对古代岩石的调查，以限制“大不整合”的发展及其与生物变化的联系。该项目包括支持一名人数不足的本科生暑期实习生、一次本科生研究研讨会和三个本科生研究项目。该项目将获得：1)准分子激光消融系统，2)建造用于原位分析的四极He线的硬件，以及3)光学轮廓仪。该设备将推动S实验室及其用户群体的研究，实现单晶的U-Th/He原位测年、U-Th和He作图、U-Pb测年以及其他元素的原位测量和作图。这些新能力将允许：1)用于战略性矿物选择的快速样品筛选，2)晶体内不均质性的量化，3)单晶中扩散梯度的直接测量，4)化学表征，5)不完美和小晶体的测年，6)高价值样品的基本无损分析，7)避免在常规全晶体加热期间发生的铀损失，8)对高保留率相进行更有效的分析，9)可能增加碎屑研究的吞吐量，以及10)原位U-Pb和(U-Th)/He双重测年。该项目包括对一名人数不足的本科生暑期实习生、一次本科生研究研讨会和三个本科生研究项目的支持。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。