Re-evaluation of the late Paleozoic ice age in eastern Australia

澳大利亚东部晚古生代冰期的重新评估

• 批准号: 0417578
• 负责人: Christopher Fielding
• 金额: $ 14万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0417578&HistoricalAwards=false
• 关键词: Re; evaluation; late; Paleozoic; ice

Through the proposed two-year project, the PIs will provide the first modern evaluation of thelate Paleozoic Gondwanan glaciation in eastern Australia. Currently, the data and observationson which the interpretations of the glacial record in eastern Australia are based predate thescientific advances in the field of glacial geology of the past thirty years and, as such, have madeit difficult to incorporate information from the region into global reviews of the issue. Therationale for the proposed project is that until new sedimentological and geochemical data aregathered and resolved into a robust stratigraphic framework, understanding of the late Paleozoicice age in eastern Australia, and how it fits into the global picture, cannot be advanced. Theproposed project will build upon the results of previous studies carried out by the PIs inQueensland and New South Wales, Australia, and will benefit from recently improved ageconstraints for the Carboniferous system of New South Wales. This investigation will include:(1) collection of sedimentological data from key areas in New South Wales, Australia; (2)generation of stable isotopic proxy records of climate change derived from climate-sensitivecalcareous components; and (3) correlation of interpreted glacial periods with other areas inAustralia and other Gondwanan continents. The applicants are uniquely qualified to carry outthis research, having the necessary sedimentological and geochemical skills and experience, acombined twenty years research experience in the field area, and a considerable inventory ofrelevant, preliminary data.Intellectual MeritThe proposed research will contribute to a developing global re-evaluationof the late Paleozoic iaicehouselo period, and as such will have relevance and significance to abroad range of geoscientists. It is anticipated that the results from this work will, among otheroutcomes, contribute to increasingly sophisticated numerical models of past climates which arenow being used iteratively to provide estimates of rates and magnitudes of climate changethrough geologic time. Broader ImpactsBecause participation in scientific research plays a strong, positive role inguiding student perceptions of career opportunities in science, both undergraduate and graduatestudents will be included in research activities. Students will be involved in data gathering andinterpretation, and will be encouraged to publish outcomes and participate in professionalmeetings. Students from groups traditionally under-represented in the geosciences will betargeted for participation. The PIs will work with the University of Nebraska-Lincoln Office ofTrio Programs to identify students from these groups. Results of the proposed research will beincorporated into education activities, presented at professional meetings, and published in peer-reviewed journals. The benefits to society, though indirect, are certainly tangible in thecontribution made to input parameters for numerical models of climate change.

通过拟议的两年期项目，PI 将首次对澳大利亚东部古生代晚期冈瓦纳冰川进行现代评估。目前，对澳大利亚东部冰川记录的解释所依据的数据和观测早于过去三十年冰川地质学领域的科学进步，因此很难将该地区的信息纳入全球冰川评估中。的问题。该项目的基本原理是，在收集新的沉积学和地球化学数据并将其解析为可靠的地层框架之前，无法推进对澳大利亚东部古生代晚期的了解以及它如何融入全球图景。拟议的项目将建立在澳大利亚昆士兰州和新南威尔士州的 PI 先前进行的研究结果的基础上，并将受益于最近改进的新南威尔士石炭系年龄限制。本次调查将包括：（1）收集澳大利亚新南威尔士州重点地区的沉积学数据； (2)从气候敏感的钙质成分中生成气候变化的稳定同位素代理记录； (3)解释的冰川期与澳大利亚和其他冈瓦纳大陆其他地区的相关性。申请人是开展这项研究的独特资格，拥有必要的沉积学和地球化学技能和经验，结合了二十年的现场研究经验，以及大量的相关初步数据。智力优点拟议的研究将有助于发展全球研究-对晚古生代iaicehouselo时期的评估，因此对国外的地球科学家具有相关性和意义。预计这项工作的结果将有助于建立日益复杂的过去气候数值模型，这些模型目前正被迭代地用于提供整个地质时期气候变化速率和幅度的估计。更广泛的影响由于参与科学研究在引导学生对科学职业机会的看法方面发挥着强大而积极的作用，因此本科生和研究生都将参与研究活动。学生将参与数据收集和解释，并鼓励发表成果并参加专业会议。来自传统上在地球科学领域代表性不足的群体的学生将成为参与的目标。 PI 将与内布拉斯加大学林肯分校 Trio 项目办公室合作，确定这些群体中的学生。拟议研究的结果将纳入教育活动，在专业会议上展示，并在同行评审期刊上发表。对社会的好处虽然是间接的，但对于气候变化数值模型的输入参数的贡献无疑是有形的。