| Title | The role of pingos in the development of the Dzhangyskol lake-pingo complex, central Altai Mountains, southern Siberia |
| Author | Blyakharchuk, T.A.; Wright, H.E.; Borodavko, P.S.; van der Knaap, W.O.; Ammann, B. |
| Author Affil | Blyakharchuk, T.A., Russian Academy of Sciences, Laboratory of Bioinformation Technologies, Tomsk, Russian Federation. Other: University of Minnesota; Institute of Plant Sciences, Switzerland |
| Source | Palaeogeography, Palaeoclimatology, Palaeoecology, 257(4), p.404-420, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 |
| Publication Date | Feb. 1, 2008 |
| Notes | In English. 36 refs. GeoRef Acc. No: 282403 |
| Index Terms | radioactive age determination; permafrost dating; age determination; radioactive age determination; carbon isotopes; dams; geochemistry; glacial lakes; ice dams; isotopes; lacustrine deposits; lake deposits; lakes; oxygen; paleoclimatology; periglacial processes; permafrost; pingos; pollen; Quaternary deposits; radioactive isotopes; sediments; thermokarst; thermokarst development; vegetation; Asia--Altai Mountains; Russia; Asia--Siberia; absolute age; Altai Mountains; Asia; biostratigraphy; C-14; carbon; Cenozoic; Commonwealth of Independent States; dates; Dzhangyskol Lake; glacial features; gyttja; Holocene; isotope ratios; Kurai Basin; lacustrine environment; lake sediments; lake-level changes; landform evolution; landscapes; miospores; natural dams; O-18/O-16; paleolimnology; palynomorphs; periglacial features; pollen diagrams; Quaternary; Russian Federation; Siberia; stable isotopes |
| Abstract | Dzhangyskol is a small lake of glacial origin in the central part of the Altai Mountains in southern Siberia. Pollen stratigraphies and chronologies of two cores record the vegetational development of the area from the Late Glacial treeless landscape to the forest and steppe of today. The modern lake is a remnant of a much larger ice-dammed lake, which was reduced in size and then temporarily drained after diversion of the inflowing mountain meltwater stream, which had low delta 18O values. The dry lake floor allowed development of permafrost and small pingos (frozen mounds of lake sediments). With the onset of greater climatic humidity in the mid-Holocene, the input of local water with higher delta 18O caused a rise in lake level, drowning the earlier pingos. Growth of a broad fen on the margin of the lake led to formation of a modern pingo complex. |
| URL | http://hdl.handle.net/10.1016/j.palaeo.2007.09.015 |
| Publication Type | journal article |
| Record ID | 62002820 |