Early Career: Acquisition of a laser ablation system to enable new constraints on continental crust, dinosaurs, and ore deposits

早期职业生涯：购买激光烧蚀系统，对大陆地壳、恐龙和矿床施加新的限制

• 批准号: 1561166
• 负责人: Gregory Dumond
• 金额: $ 54.23万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1561166&HistoricalAwards=false
• 关键词: Early; Career; Acquisition; laser; ablation

This project seeks to use laser ablation techniques to understand three fundamental aspects of the Earth system: 1) the origin and evolution of Earth?s continents, 2) the preservation of fossil bone material and its use in constraining aspects of Earth?s paleoclimate, and 3) understanding the source and development of economic ore deposits. Of particular interest to the national interest is the project?s efforts to mitigate dinosaur fossil bone poaching and to develop new methods for understanding the origin of economically viable metal ore deposits. This award also provides critical analytical support for three early career scientists, including two women, one of whom is Hispanic. Finally, the award will help establish a new laboratory that will facilitate the education of undergraduate and graduate Earth scientists in cutting edge analytical techniques that are applicable to understanding the Earth environment.This award will help establish the University of Arkansas? TRAIL facility (Trace element and Radiogenic Isotope Laboratory). Laser ablation capabilities provided by this award will be used to develop both conventional and split-stream analytical protocols for accessory phases, fossil bone, and sulfides utilizing the laboratory?s existing multi-collector and quadrupole ICP-MS instruments. The lab will be focused on three main goals: 1) using accessory phase (e.g., monazite, zircon, and titanite) Th-U-Pb petrochronology to constrain the metamorphic reactions that occur during melting and deformation in the deep continental crust, 2) understanding vertebrate taphonomy and its utility for constraining aspects of paleoclimate and paleoecology, and 3) providing new constraints on the genesis of economic ore deposits via the in situ analysis of Pb-isotopes, Cu-isotopes, and trace elements in sulfides. A fourth early career scientist in the Department of Anthropology will utilize LA-ICP-MS to analyze archeological pottery to constrain trade networks.

该项目试图使用激光消融技术来了解地球系统的三个基本方面：1）地球大洲的起源和进化，2）保存化石骨料及其在地球古气候的约束方面的使用， 3）了解经济矿床的来源和发展。国家利益特别感兴趣的是该项目减轻恐龙化石骨偷猎的努力，并开发出了解经济上可行的金属矿石矿床起源的新方法。该奖项还为三名早期职业科学家，包括两名女性，其中一名是西班牙裔。最后，该奖项将有助于建立一个新的实验室，该实验室将有助于在尖端分析技术中的本科生和研究生地球科学家的教育，这些技术适用于理解地球环境。该奖项将有助于建立阿肯色大学？步道设施（痕量元素和放射性同位素实验室）。该奖项提供的激光消融能力将用于开发用于辅助阶段，化石骨和硫化物的传统和分流分析方案，利用实验室现有的多核心和四倍体ICP-MS仪器。该实验室将集中在三个主要目标上：1）使用辅助阶段（例如，独居石，锆石和钛铁矿）TH-U-PB石化学来限制深层大陆壳中熔化和变形过程中发生的变质反应，2）理解脊椎动物的taphonomy及其对限制古气候和古生态学方面的实用性，以及3）通过对PB - 异构体，Cu-异构体和硫化物中的痕量元素的原位分析对经济矿石沉积物的起源提供新的约束。人类学系的第四位早期职业科学家将利用LA-ICP-MS分析考古陶器来限制贸易网络。