SGER: Oxygen and cosmogenic isotope approaches to paleoaltimetry of the Bolivian Altiplano

此次SGER授予的目的是评估利用玻利维亚高原沉积的碳酸盐的* 18o值作为古高度计的潜力。* 18o古测高技术依赖于对研究区域大气水* 18o值随海拔变化的理解，并已在喜马拉雅地区成功应用。项目负责人希望将这项技术推广到玻利维亚安第斯山脉和高原的不同气候条件下。此外，宇宙古高度计在理论上是可行的，该项目寻求资金为开发新的地质古高度计奠定基础。如果成功，该项目获得的信息将允许独立计算古海拔，可以与现有的古植物学，地貌学和结构估计进行比较。该项目的探索性以及定量计算Altiplano古高程和评估一种新的古测高程技术的潜在影响使这项工作非常适合SGER资助。该建议的广泛影响是更好地建立氧同位素在古海拔研究中的应用，并测试一种新的测定古海拔的宇宙成因方法。这两种技术将广泛适用于其他现代和古代造山系统。

GarzioneEAR-0220986The purpose of this SGER award is to assess the potential for using the * 18 O values of carbonates deposited on the Bolivian Altiplano as a paleoaltimeter. The * 18 O paleoaltimetric technique relies on an understanding of the changes in the * 18 O values of meteoric water vs. altitude in the region of study and has been used successfully in the Himalaya. The PI's would like to extend the use of this technique to the diverse climatic regimes across the Bolivian Andes and Altiplano. Additionally, a cosmogenic paleoaltimeter is theoretically feasible, and this project seeks the funds to the lay the groundwork for development of a new geologic paleoaltimeter. If successful, the information gained by this project will allow an independent calculation of paleoelevation that can be compared with existing paleobotanical, geomorphologic, and structural estimates. The exploratory nature of this project and the potential impacts of 1) quantitatively calculating Altiplano paleoelevation and 2) assessing a new paleoaltimetric technique makes this work highly appropriate for SGER funding. The broader impacts of this proposal are to better establish the use of oxygen isotopes in studies of paleoelevation and to test a new cosmogenic method for paleoelevation determination. Both of these techniques will be broadly applicable to other modern and ancient orogenic systems.