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"Neogene aridification and lake development in the Issyk-Kul basin, Kyr" by Anna Kudriavtseva, Edward R. Sobel et al.

Uplift of the Tian Shan range modified regional climate during Cenozoic aridification in Central Asia. This study presents facies analyses and Neogene oxygen and carbon isotopic records from magnetostratigraphically dated terrestrial sedimentary sections on the southern side of the intermontane Issyk-Kul basin in the Kyrgyz Tian Shan and 26Al/10Be isochron burial ages from the southern and eastern sides of the basin. The δ18O and δ13C data show a positive ca. 2‰ shift in values between ca. 8 and 7 Ma and a change from a negative to a positive trend. This change is attributed to the upwind growth of the Kyrgyz, Kungey and Trans Ili (Zaili) ranges, which diverted the westerlies, thereby changing the Issyk-Kul basin from a windward to a leeward position, enhancing aridification and establishing the modern-day spring and summer precipitation regime within the basin. Two 4 to 5 Ma 26Al/10Be isochron burial ages constrain the onset of Sharpyl Dak deposition on the eastern side of the bas ....

Issyk Kul , Ysyk Kög , Oshskaya Oblast , Ili Zaili , Tian Shan , Kyrgyz Tian Shan , Trans Ili , Sharpyl Dak , Northern Hemisphere , Cenozoic Aridification , Central Asia , Osmogenic Al Be 26 10 , Ectonic Uplift ,