Acquisition of a Laser Ablation System in Support of (U-Th)/He and U/Pb Multidating of Accessory Minerals

获取激光烧蚀系统以支持副矿物 (U-Th)/He 和 U/Pb 多重测年

• 批准号: 1321361
• 负责人: Kip Hodges
• 金额: $ 21.6万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1321361&HistoricalAwards=false
• 关键词: Acquisition; Laser; Ablation; System; Support

In recent years, geoscientists have increasingly applied the methods of geochronology - the determination of mineral crystallization ages - and thermochronology - the determination of cooling ages - to minerals in sedimentary rocks with the aim of fingerprinting the bedrock sources of these minerals and the cooling histories of those sources. There is great scientific advantage in performing both geochronologic and thermochronologic studies on the same mineral grains, but conventional analytical techniques seldom enable such 'multidating' studies. This grant permits the acquisition of a new ultraviolet laser ablation instrument that, when integrated with existing instruments in the Noble Gas Geochronology and Geochemistry Laboratories at Arizona State University, will establish the first fully automated analytical system for zircon (U-Th)/He thermochronology and U/Pb geochronology.Broader impacts from this project include opportunities for geology graduate and undergraduate students from outside the ASU community to perform analyses on the system as guest researchers. In addition, the integration of components to build the system will serve as a case study for an on-line 'analytical systems engineering' subject in ASU's B.S. degree program in Exploration Systems Design.

近年来，地球科学家越来越多地将地质年代学（测定矿物结晶年龄）和热年代学（测定冷却年龄）方法应用于沉积岩中的矿物，目的是确定这些矿物的基岩来源和这些来源的冷却历史。对同一矿物颗粒进行地质年代学和热年代学研究具有巨大的科学优势，但传统的分析技术很少能够实现这种“多重测年”研究。这笔赠款允许购买一台新型紫外激光烧蚀仪器，该仪器与亚利桑那州立大学稀有气体地质年代学和地球化学实验室的现有仪器集成后，将建立第一个锆石（U-Th）/He热年代学和U/Pb地质年代学的全自动分析系统。该项目的更广泛影响包括为亚利桑那州立大学社区以外的地质学研究生和本科生提供机会 作为客座研究人员对系统进行分析。此外，构建系统的组件集成将作为亚利桑那州立大学理学士学位在线“分析系统工程”科目的案例研究。探索系统设计学位课程。