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).

氧和碳的双凝聚同位素（D47和D48）的使用是一种尖端的分析方法来估计古温度，具有很好的解决各种问题的潜力。学生将参与开发和完善这种新的分析方法，以测量碳酸盐矿物产生的二氧化碳小样本中的三重氧（16 O，17 O，18 O）和碳（12 C，13 C）同位素。他们将在剑桥的戈德温实验室使用一台新的质谱仪，这台质谱仪是最近在EPSRC的支持下购买的，专门用于这一应用。这是一个案例的学生，学生将直接与工业合作主管和其他应用专家和工程师在仪器公司的实验室在弗雷克瑟姆，以改善和完善必要的硬件（离子源和电子学），计算机控制，样品制备和数据处理软件，以优化delta 47和delta 48测量的精密度和准确度。分析科学的这些发展所带来的准确性将确保矿物温度估计的准确性大大优于以前所能达到的准确性。学生将通过应用双聚集同位素方法来验证这种方法的重要性，以选择用于研究过去气候和灭绝生物生理学的重要应用。这将涉及使用各种技术（例如，扫描电镜、阴极发光、微量元素），在同位素分析之前仔细评估和选择样品，以避免那些受蚀变/埋藏成岩作用影响的样品。这个多学科项目借鉴了剑桥（古气候学、古生物学）和Nu仪器（分析科学）主管的专业知识。