A multimethod dating study of ancient permafrost, Batagay megaslump, east Siberia
Datos Bibliográficos
Dating of ancient permafrost is essential for understanding long-term permafrost stability and interpreting palaeoenvironmental conditions but presents substantial challenges to geochronology. Here, we apply four methods to permafrost from the megaslump at Batagay, east Siberia: (1) optically stimulated luminescence (OSL) dating of quartz, (2) post-infrared infrared-stimulated luminescence (pIRIR) dating of K-feldspar, (3) radiocarbon dating of organic material, and (4) 36 Cl/Cl dating of ice wedges. All four chronometers produce stratigraphically consistent and comparable ages. However, OSL appears to date Marine Isotope Stage (MIS) 3 to MIS 2 deposits more reliably than pIRIR, whereas the latter is more consistent with 36 Cl/Cl ages for older deposits. The lower ice complex developed at least 650 ka, potentially during MIS 16, and represents the oldest dated permafrost in western Beringia and the second-oldest known ice in the Northern Hemisphere. It has survived multiple interglaciations, including the super-interglaciation MIS 11c, though a thaw unconformity and erosional surface indicate at least one episode of permafrost thaw and erosion occurred sometime between MIS 16 and 6. The upper ice complex formed from at least 60 to 30 ka during late MIS 4 to 3. The sand unit above the upper ice complex is dated to MIS 3–2, whereas the sand unit below formed at some time between MIS 4 and 16.
Geochemistry · Geochronology · Geomorphology · Holocene · Interglacial · Marine isotope stage · Optically stimulated luminescence · Permafrost · Quartz · Quaternary · Radiocarbon dating · Radiometric dating · Stadial · Thermoluminescence dating · Climate change and permafrost · Geology · Geology and Paleoclimatology Research · Methane Hydrates and Related Phenomena · Oceanography · Paleontology
Preliminary paleoenvironmental analysis and luminescence dating of upper Middle Pleistocene permafrost deposits of the Ulakhan Sular Formation, Adycha River, east Siberia
Microstructure and geochemical properties of modern and buried soils and hosting permafrost sediments of the Batagay retrogressive thaw slump
Direct AMS radiocarbon age of the MIS 3-2 thin composite wedges from Batagay Upper Sand
Blueprint for forever
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An Introduction to Optical Dating
Holocene thermal maximum in the western Arctic (0–180°W)
Laboratory fading rates of various luminescence signals from feldspar-rich sediment extracts
A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ 18 O records
Testing the potential of an elevated temperature IRSL signal from K-feldspar
The spatial and temporal complexity of the Holocene thermal maximum
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Anomalous Fading of Thermo-luminescence in Mineral Samples
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Drac
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The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
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| Obras citantes distintas | 5 |
|---|---|
| Citas por año | 1,25 |
| Intervalo de citas | 2022 - 2025 (4) |
| Velocidad de citación | recent |
| Altamente citado | No |
| Tipos de cita | Neutras: 3 |