Clumped isotope thermometry

团块同位素测温法

• 批准号: 2568780
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2568780
• 关键词: Clumped; isotope; thermometry

The use of dual clumped isotopes of oxygen and carbon (D47 and D48) is a cutting-edge analytical method to estimate palaeotemperatures with excellent potential for solving a wide variety of problems. The student will be involved in the development and refinement of this new analytical approach to the measurement of triple oxygen (16O, 17O, 18O) and carbon (12C, 13C) isotopes in small samples of CO2 produced from carbonate minerals. They will use a new mass spectrometer in the Godwin Laboratory at Cambridge which has recently been purchased, with support from EPSRC, specifically for this application. This is a Case studentship and the student will work directly with the and the industrial co-supervisor and other application specialists and engineers in the instrument company's laboratories in Wrexham to improve and refine the necessary hardware (ion source and electronics), computer control, sample preparation and data processing software to optimise the precision and accuracy of the measurement of delta47 and delta48.The increased precision and accuracy resulting from these developments in the analytical science will ensure that the accuracy of temperature estimates for minerals are significantly better than previously attainable. The student will validate the importance of this approach by applying the dual clumped isotope method to a selection of important applications for the study of past climate and the physiology of extinct organisms. This wil involve using a variety of techniques (e.g., SEM, cathodoluminescence, trace elements) to carefully evaluate and select samples prior to isotope analysis in order to avoid those affected by alteration/burial diagenesis.This multidisciplinary project draws on expertise of supervisors in Cambridge (palaeoclimatolgy, palaeobiology) and at Nu Instruments (analytical science).

使用氧和碳的双簇同位素（D47 和 D48）是一种估算古温度的尖端分析方法，具有解决各种问题的巨大潜力。该学生将参与开发和完善这种新的分析方法，用于测量碳酸盐矿物产生的二氧化碳小样品中的三氧（16O、17O、18O）和碳（12C、13C）同位素。他们将在剑桥戈德温实验室使用一台新的质谱仪，该实验室是最近在 EPSRC 的支持下购买的，专门用于此应用。这是一个案例助学金，学生将直接与雷克瑟姆仪器公司实验室的工业联合主管以及其他应用专家和工程师合作，改进和完善必要的硬件（离子源和电子设备）、计算机控制、样品准备和数据处理软件，以优化 delta47 和 delta48 测量的精度和准确度。分析科学的这些发展带来的精度和准确度的提高将确保矿物温度估计的准确度明显优于以前的水平。学生将通过将双簇同位素方法应用于研究过去气候和灭绝生物生理学的一系列重要应用来验证这种方法的重要性。这将涉及使用各种技术（例如，SEM、阴极发光、微量元素）在同位素分析之前仔细评估和选择样本，以避免受到蚀变/埋藏成岩作用的影响。这个多学科项目借鉴了剑桥主管的专业知识（古气候学、古生物学）和 Nu Instruments（分析科学）。