Acquisition of a 213nm laser and cathodoluminescence detector for microanalysis of zircon and other Earth materials

0824974 Kohn该提案旨在获得资金，用于博伊西州立大学的地质年代学和微量元素研究的213 nm激光和阴极发光（CL）探测器。CL探测器将固定在物理系现有的JEOL JSM-T300 SEM上。该仪器目前具有SE、BSE和EDS探测器，包括数字成像功能的升级，以允许SEM与CL探测器连接。SEM-CL将用于靶向锆石，以便使用所需激光进行后续激光消融（LA）ICP-MS。CL探测器也被提出用于针对石英中的Ti测量域。激光器将固定在一个待购买的四极ICP-MS上，该四极ICP-MS将被安置在地球科学系，用于锆石、石榴石、独居石、碳酸盐和磷酸盐化石分析。该仪器将用于正在进行的NSF EAR资助的研究项目。主要目标包括：1）使用CL-SEM结合ID-TIMS进行原位U-Th-Pb锆石定年，以确定矿物年龄，2）使用LA-ICP-MS进行石榴石和其他硅酸盐分带分析，以推断成岩过程并更好地了解高分辨率放射性同位素组成，3）使用U-Th-Pb衰变系列进行独居石定年，4）使用U系列进行碳酸盐和化石定年，（5）有孔虫元素分带分析，确定古温度和古营养元素分布;（6）石英CL成像，用于后续的钛测温。这些测量的基本主题包括更好地了解古生代气候变化，碎屑岩的来源和地层，岩石起源和历史，以及古营养元素的分布和循环。 CL仪器将被纳入物理系现有的SEM系统，该系统将被升级以支持数字成像。SEM系统将继续由目前资金雄厚的技术人员维护。使用CL时，将增加薪酬费用作为附加费。LA系统将与新购买的ICP-MS在一个新装修的实验室。一名全职技术人员将通过大学资助项目雇用。Co-PI Crowley将与技术人员沿着管理LA-ICP-MS，包括维护和培训。使用时将按小时收费。该仪器将作为基础，通过现有的推广方案，其中包括研讨会和实验室图尔斯之旅，在各级学生培训。通过目前的外联工作，有100多名大学预科学生受到了影响。PI最近因将本科生纳入实验室工作而获得了年度本科生研究导师奖。这些仪器将被纳入教学课程，研究成果将通过文献和合作努力传播。***

0824974Kohn This proposal seeks funding to acquire a 213 nm laser and cathodolminescence (CL) detector for geochronologic and trace element research at Boise State University. The CL detector will be affixed to an existing JEOL JSM-T300 SEM currently deployed in the Department of Physics. The instrument currently has SE, BSE, and EDS detectors Upgrades for digital imaging capabilities are included to allow the SEM to interface with the CL detector. The SEM-CL will be used to target zircons for subsequent laser ablation (LA) ICP-MS with the requested laser. The CL detector is also proposed for targeting Ti measurement domains in quartz. The laser will be affixed on a to-be-purchased quadrapole ICP-MS to be housed in the Department of Geosciences for zircon, garnet, monazite, carbonate and phosphatic fossil analysis. The instrumentation will be employed for on-going NSF EAR-funded research projects. Major objectives in clued: 1) in situ U-Th-Pb zircon dating using CL-SEM coupled with ID-TIMS allowing mineral age determination, 2) garnet and other silicate zoning analysis using LA-ICP-MS to infer petrogenic processes and better understand high-resolution radiogenic isotope compositions, 3) monazite dating using U-Th-Pb decay series, 4) carbonate and fossil dating using U-series, 5) foraminifera elemental zoning analysis to determine paleotemperatures and paleonutrient distributions, and 6) quartz CL imaging for subsequent Ti-thermometry. Underlying themes among these measurements include a better understanding of Paleozic climate changes, clastic rock provenance and stratigraphy, rock origins and histories, and paleonutrient distributions and cycling. The CL instrumentation will be incorporated into existing SEM system housed on the Department of Physics which will be upgraded to support digital imaging. The SEM system will continue to be maintained by currently hard-funded technicians. Remuneration costs will be added as a surcharge for CL usage. The LA system will be coupled with the newly-purchased ICP-MS in a newly-renovated laboratory. A full-time technician will be hired through University funding lines. Co-PI Crowley will administer the LA-ICP-MS to include maintenance and training, along with the technician. An hourly rate will be charged for usage. The instrumentation will serve as the basis for student training at all levels through existing outreach programs which feature seminars and laboratory tours. Over 100 pre-college students have been exposed through the current outreach efforts. The PI recently received an Undergraduate Research Mentor of the Year award for incorporating undergraduates in laboratory efforts. The instrumentation will be incorporated into teaching curricula and research results will be disseminated through the literature and through collaborative efforts. ***