青藏高原古高程定量恢复研究进展

Research Progress of Quantitative Paleoelevation Reconstruction of Tibetan Plateau

目前在青藏高原使用的古高程定量恢复的方法有:氧同位素古高程计(包含热动力学模型和经验模型)、△47古温度—古高程计、氢同位素古高程计、古植物古高程计(包含共存分析法、叶相分析法)和古环境分析。详细分析了各古高程计的原理、应用条件、影响因素和优缺点,进一步总结了各种研究方法取得的成果和存在的问题,探讨了各研究方法在青藏高原定量古高程研究方向的应用潜力和发展前景,并对完善现有的古高程计和今后开发新的古高程计提出相关建议。

Quantitative estimation of paleoelevation is crucial to constrain uplift history of the Tibetan Plateau.So far,there are four kinds of paleoaltimeter used to reveal Cenozoic paleoelevation of the Tibetan Plateau,including oxygen-isotope paleoaltimeter,△47 paleotemperature-paleoaltimeter,Hydrogen-isotope paleoaltimeter,Paleobotanic paleoaltimeter,and Analysis of paleoenvironment. The oxygen-isotope paleoaltimeter,which is based on the relationship between the oxygen isotope value（ δ^18O） of surface water and elevation,includes empirical relationship equation and model relationship equation. △47 paleotemperature-paleoaltimeter is a new approach to reconstruct paleoelevation,which has been used in just one position in Tibet. Paleobotanic paleoaltimeter contains co-existence analysis and leaf physiognomic approach,and Analysis of paleoenvironment is a semi-quantitative method. Through detailed comparison of various principles,application condition,influencing factors,and pros-cons of the different paleoaltimeters,we focused on summarizing achievements and problems of these research methods,and further discussed their application potential and prospects. In the future work,we need to pay more attention to obtain new modern data to improve the above paleoaltimeters and introduce new paleoaltimeters.