Late Neogene climatic features recorded by isotope records in the Issyk Kul basin, Kyrgyzstan

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dc.contributor.authorKudriavtseva, Aen_AU
dc.contributor.authorSobel, Een_AU
dc.contributor.authorCodilean, ATen_AU
dc.contributor.authorRoud, Sen_AU
dc.contributor.authorWack, Men_AU
dc.contributor.authorGilder, Sen_AU
dc.contributor.authorHoke, Gen_AU
dc.contributor.authorMulch, Aen_AU
dc.contributor.authorMikolaichuk, Aen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorFülöp, RHen_AU
dc.contributor.authorWilcken, KMen_AU
dc.date.accessioned2023-03-30T21:49:49Zen_AU
dc.date.available2023-03-30T21:49:49Zen_AU
dc.date.issued2021-04-19en_AU
dc.date.statistics2023-03-28en_AU
dc.description.abstractWe present two carbonate oxygen and carbon isotope records from late Miocene – early Pleistocene stratigraphic sections from the southern flank of the Issyk Kul basin, Kyrgyz Tien Shan. The two sections are 700 and 500 m thick and composed of fluvial and lacustrine sediments. They were dated using magnetostratigraphy (Roud et al., G-Cubed, in review) and 26Al/10Be isochron burial dating (presented here). Carbonate stable isotope data is useful for reconstruction of climate in Asia over the Cenozoic. Oxygen isotopes are commonly used to detect moisture sources and their interaction with topography. Pedogenic carbon isotopes are used to reconstruct past atmospheric CO2 levels or the spread of C4 vegetation. The environment of Central Asia is primarily affected by the northern mid-latitude westerlies − winds transporting moisture eastward across Eurasia. Issyk Kul basin is situated on the windward side of the northern Tien Shan. Published data suggest that the Tien Shan mountain ranges interacted with the westerlies since late Oligocene and reorganized Central Asian climate during Neogene (Caves et al., 2017; Charreau et al., 2012; Macaulay et al., 2016; Wang, et al., 2020). The amount of existing published paleoclimate data from northern Central Asia is scarce compared to interior China, and therefore the influence of the Tien Shan uplift on climate in Asia during the Cenozoic is poorly reconstructed. Our data provide new insight into the role of the range and its interaction with the westerlies in forming climate on the windward side of the northern Tien Shan in the late Neogene. We combine our data with published stratigraphically-older sections nearby (Macaulay et al., 2016) to complete the Neogene stable isotope record of the Issyk Kul basin and study how the evolution of the basin influenced regional climate. Our d18O and d13C values show slightly positive trends, unlike stratigraphically-older data from the Issyk Kul basin. The preliminary interpretation suggests that the circulation pattern within the range was changed in late Miocene possibly reflecting active tectonic uplift northward of the basin and an increase in aridification.en_AU
dc.identifier.citationKudriavtseva, A., Sobel, E., Codilean, A., Roud, S., Wack, M., Gilder, S., Hoke, G., Mulch, A., Mikolaichuk, A., Fink, D., Fülöp, R., & Wilcken, K. (2021). Late Neogene climatic features recorded by isotope records in the Issyk Kul basin, Kyrgyzstan. Paper presented to the EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12907. Retrieved from: https://doi.org/10.5194/egusphere-egu21-12907en_AU
dc.identifier.conferenceenddate30 April 2021en_AU
dc.identifier.conferencenameEGU General Assembly 2021en_AU
dc.identifier.conferenceplaceOnlineen_AU
dc.identifier.conferencestartdate19 April 2021en_AU
dc.identifier.otherEGU21-12907en_AU
dc.identifier.urihttps://doi.org/10.5194/egusphere-egu21-12907en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14760en_AU
dc.language.isoenen_AU
dc.publisherCopernicus GmbHen_AU
dc.subjectCarbon isotopesen_AU
dc.subjectCarbonatesen_AU
dc.subjectDataen_AU
dc.subjectClimatesen_AU
dc.subjectEnvironmenten_AU
dc.subjectWinden_AU
dc.subjectKyrgyzstanen_AU
dc.subjectAsiaen_AU
dc.titleLate Neogene climatic features recorded by isotope records in the Issyk Kul basin, Kyrgyzstanen_AU
dc.typeConference Paperen_AU
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