Paleothermometry of Sedimentary Carbonates in the Andean Plateau, and the Timing and Lateral Extent of Surface Uplift

EAR-0543952 EILER这项工作的目标是创建一个数据集，该数据集展示了成束同位素测温法重建土壤温度记录的能力和局限性，并指导生成可靠记录所需的采样和分析方案。基于我们之前在中新世和最近玻利维亚高原土壤上的工作，我们认为有合理的机会在一年内成功完成这项任务，这项工作将需要大约50个块状同位素分析，并得到分析样本的扫描电子显微镜、光学显微镜和电子探针表征的支持。具体地说，我们将进行为期一年的稳定同位素系统学研究，包括对几套现代和现代土壤碳酸盐的块状同位素测温仪测量，这些土壤的平均生长温度可以根据气象记录和/或独立的古气候重建来独立估计。我们将检查的样品包括最近从高原中北部和美国西部(主要是怀俄明州中部和科罗拉多州高原)采集的土壤碳酸盐。

EAR-0543952EILERThe goals of this work are to create a data set that demonstrates the capabilities and limitations of clumped isotope thermometry for reconstructing soil temperature records, and that guides sampling and analytical protocols required to generate reliable records. Based on our previous work on Miocene and recent Bolivian Altiplano soils, we believe there is a reasonable chance of succesfully completing this task within 1 year, and that this work will require ca. 50 'clumped isotope' analyses, supported by SEM, optical microscopy and electron microprobe characterizations of analyzed samples.Specifically, we will conduct a 1-year study of the stable isotope systematics, including 'clumped isotope thermometry' measurements of several suites of modern and recent soil carbonates, for which average growth temperatures can be independently estimated based on meteorological records and/or independent paleoclimatic reconstructions. The suites we will examine include recent soil carbonates sampled from the north-central Altiplano plateau and the western United States (principally central Wyoming and the Colorado plateau).