Paleoclimatic and Paleohydrologic Reconstruction in Western China

这项研究的目的是建立绝对的 年表和重建第四纪气候和水- 柴达木盆地是一个干旱的高海拔盆地 在中国西部。 学习材料主要包括长 中国科学家在青海盐场取回的岩心 中央研究院湖泊研究所。 这些核心具有 交替的钠长石盐和碎屑沉积层 在整个第四纪的不同气候条件下 或者更长。 在选定的核心上，QSLI的科学家们已经发射了 稳定同位素研究、铀系/14 C/古地磁测年、 花粉和粒度分析，介形类，和主要/次要 元素化学 详细的地质年代学研究将使用 宇宙成因26 Cl的加速器质谱测量 和10 Be，补充铀系测年， 最近的章节 此外，36 Cl和可能的10 Be积聚 对昆仑山的冰碛物进行年代测定， 柴达木盆地将进行提供一个框架， 将冰川的波动与 水文系统与湖泊变化 终点站 拟议的研究将是一个联合项目， 中国科学家在QSLI的样本将被共享， 相关数据将被汇集，以达到最佳的解释， 的古气候和古水文历史 地区 中亚是世界上最后一个巨大的“空白区”之一， 在第四纪气候变化方面。 也是 一个特别重要的区域，位于中心附近 世界上最大的陆地 因此，这项研究 气候波动将导致全球 古气候科学 ***

The objective of this research is to establish absolute chronologies and reconstruct Quaternary climatic and water- balance variations in Qaidam Basin, an arid, high altitude basin in western China. The study material consists mainly of long drill cores retrieved by Chinese scientists at the Qinghai Salt Lakes Institute (QSLI), Academia Sinica. These cores have alternating layers of evaporitic salts and clastic sediments laid down in varied climatic conditions through the entire Quaternary or longer. On selected cores, the QSLI scientists have launched studies of stable isotopes, U-series/14C/paleomagnetic dating, pollen and grain-size analyses, Ostracods, and major/minor elemental chemistry. Detailed geochronological studies will be done using accelerator mass-spectrometric measurements of cosmogenic 26Cl and 10Be, supplemented with uranium-series dating for the more recent sections. Additionally, 36Cl and possibly 10Be buildup dating glacial moraines in the Kunlun Mountains bordering the Qaidam Basin will be carried out to provide a framework for correlating the glacial fluctuations at the headwaters of the hydrologic systems with the lacustrine variations at the terminus. The proposed research will be a joint project with the Chinese scientists at QSLI in that samples will be shared and all the relevant data will be pooled to arrive at optimal interpre- tations of the paleoclimatic and paleohydrologic history of the region. Central Asia is one of the last great "blank areas" in the world with regard to Quaternary climatic change. It is also an area of particular importance, lying, as it does, near the center of the world's largest landmass. Therefore, any light this study will shed on climatic fluctuations would contribute to global paleoclimatological science. ***