Age determination and bulk geochemistry of sediment core KK12-1, Lake Karakul, Tajikistan in 2012 ...

• Main Authors: Heinecke, Liv, Mischke, Steffen, Adler, Karsten, Barth, Anja, Biskaborn, Boris K, Plessen, Birgit, Nitze, Ingmar, Kuhn, Gerhard, Rajabov, Ilhomjon, Herzschuh, Ulrike
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2017
• Subjects: Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Polar Terrestrial Environmental Systems @ AWI AWI_Envi; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.876024; https://doi.pangaea.de/10.1594/PANGAEA.876024

We present results of analyses on a sediment core from Lake Karakul, located in the eastern Pamir Mountains, Tajikistan. The core spans the last ~29 cal ka. We investigated and assessed processes internal and external to the lake to infer changes in past moisture availability. Among the variables used to infer lake-external processes, high values of grain-size end-member (EM) 3 (wide grain-size distribution that reflects fluvial input) and high Sr/Rb and Zr/Rb ratios (coinciding with coarse grain sizes), are indicative of moister conditions. High values in EM1, EM2 (peaks of small grain sizes that reflect long-distance dust transport or fine, glacially derived clastic input) and TiO 2 (terrigenous input) are thought to reflect greater influence of dry air masses, most likely of Westerly origin. High input of dust from distant sources, beginning before the Last Glacial Maximum (LGM) and continuing to the late glacial, reflects the influence of dry Westerlies, whereas peaks in fluvial input suggest increased ... : Supplement to: Heinecke, Liv; Mischke, Steffen; Adler, Karsten; Barth, Anja; Biskaborn, Boris K; Plessen, Birgit; Nitze, Ingmar; Kuhn, Gerhard; Rajabov, Ilhomjon; Herzschuh, Ulrike (2017): Climatic and limnological changes at Lake Karakul (Tajikistan) during the last ~29 cal ka. Journal of Paleolimnology, 58(3), 317-334 ...