Holocene glacier fluctuations and climate changes in the southeastern part of the Russian Altai (South Siberia) based on a radiocarbon chronology

Агатова, А. Р.; Nazarov, Andrey; Непоп, Р. К.; Rodnight, Helena

doi:10.1016/j.quascirev.2012.04.012

Cited by 99 publications

(77 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Once again, the question of using them for reconstructing independent glaciation is open. Lack of geochronological data makes it difficult to determine the age of moraines except the nearest to the modern glacier LIA (13 th -19 th centuries) moraines (Agatova et al, 2012).…”

Section: Location Of Study Sitementioning

confidence: 99%

Pleistocene glaciations of the SE Altai, Russia, based on geomorphological data and absolute dating of glacial deposits in Chagan reference section

Агатова

Непоп

2017

Geochronometria

View full text Add to dashboard Cite

Geomorphological evidence of at least two Pleistocene glacial epochsis noted within the Chagan-Uzun river basin, SE Altai. A review and analysis of all available absolute dates for reference Chagan section is presented. The highest correlation amongst all TL dates is observed for the lens of glacio-lacustrine sediments -the most suitable among glacial deposits for luminescence dating, and indicates its possible Middle Pleistocene age. IRSL dates obtained from feldspar indicate a Middle Pleistocene age of moraines already in the upper part of the section. The small number of obtained IRSL dates does not allow making geochronological reconstructions of the Pleistocene glaciations, but gives the possibility for further experiments with different variation of OSL (IRSL) techniques. Strong low temperature peak in TL signal and strong response to IR stimulation are specific regional quartz features, which could be explained by combination of short transportation distance and low number of depositional cycles for mineral grains. Available radiocarbon dates of carbonate concretions from this section are not related to the age of moraine sedimentation and most likely indicate the period of the Chagan river incision into the ancient glacial deposits. This study has shown that TL method is not valid for dating glacial sediments and TL dates cannot be utilized as chronostratigraphic markers. Generally, the Chagan section could hardly serve as a reference section for the Altai stratigraphy; available depositional correlation schemes for the Russian Altai and Siberia which are based on several TL dates obtained in the last century needs to be improved.

show abstract

Section: Location Of Study Sitementioning

confidence: 99%

Pleistocene glaciations of the SE Altai, Russia, based on geomorphological data and absolute dating of glacial deposits in Chagan reference section

Агатова

Непоп

2017

Geochronometria

View full text Add to dashboard Cite

show abstract

“…Mayewski et al, [29] and references therein) have demonstrated that distinct periods of climate change occurred repeatedly throughout the Holocene [30]. Mountain glaciers are potentially good climatic indicators, but most of the information on the dynamic responses of mountain glaciers to past climate changes comes from European glaciers which only form 3% of the world's glaciated area [31].…”

Section: Holocene Glacier Extentmentioning

confidence: 99%

Late Pleistocene and Holocene Glacier Extent in the Georgian Caucasus

Tielidze¹

2017

OJG

View full text Add to dashboard Cite

This article presents the information of the Georgian Caucasus glaciation at the Late Pleistocene and Holocene period (~126,000-11,700 calendar years ago). Our primary aim was to numerically reproduce the ice extent deduced from geological and geomorphological mapping. We used the analog method with the 30 m resolution SRTM DEM (Shuttle Radar Topography Mission Digital Elevation Model). In addition, the rates of glaciation of those times are identified based on the stadial moraines and erratic boulders. The current investigation has revealed that in the Late Pleistocene, the central and western Caucasus characterized the highest glaciation, while the eastern Caucasus boasted the lowest glaciated area, and in the southern Georgia's highland glaciation has almost the same form as there is in the Eastern Caucasus today. The longest glaciers were located in the Enguri (Nenskra ~36 km, Mulkhura ~35.1 km, Dolra ~34.5 km), Kodori (Sakeni ~25 km, Klichi ~20 km, Marukhi ~17.3 km) Rioni (Buba ~23 km, Kirtisho ~20.5 km, Jejora ~17.5 km) and Tergi (Devdoraki ~38.5 km, Suatisi ~32 km) river basins. We found, that topography thresholds related to the elevation and hypsometry of individual catchments controlled the gradient of the rate of glacier expansion in the domain at that time.

show abstract

“…198, 199] В ранних работах, основываясь на результа тах радиоуглеродного датирования, мы связыва ли начало активизации ледников Центрального Алтая с XIII-XIV вв ., причём крупные ледники достигали максимума именно в этот период, а не большие -в конце XV -начале XVI вв . [19,20,29] . Считалось, что правая часть моренного вала Малого Актру образовалась на столетие раньше, чем левая (середина -конец XIV в .)…”

Section: результаты и обсуждениеunclassified

“…Вместе с тем по полученно му набору дат нельзя провести однозначное дати рование . Древесные остатки в левой части вала в положении in situ, описанные нами ранее [20,29], датированию дендрохронологическими метода ми не подлежат . Тем не менее, если не принимать во внимание явно случайную дату (обр .…”

Section: результаты и обсуждениеunclassified

“…Адаменко [2] . Полученный массив радио углеродных дат, дополненный позже нами [9,10,20,29], восстанавливает достаточно стройную и объек тивную картину климатических событий от сред него голоцена до современности . Необходимость очередного обращения к данной теме вызвана на коплением большого объёма дендрохронологиче ского материала, приведшего, с одной стороны, к дополнению и детализации истории климата бли жайшего прошлого, а с другой -к её значительно му изменению .…”

Section: Introductionunclassified

See 1 more Smart Citation

Activity of Maly Aktru Glacier (Сentral Altai) and changes tree line fluctuations in its basin for a historical period

Nazarov¹,

Myglan²,

Орлова³

et al. 2016

Lëd i sneg

View full text Add to dashboard Cite

Holocene glacier fluctuations and climate changes in the southeastern part of the Russian Altai (South Siberia) based on a radiocarbon chronology

Cited by 99 publications

References 28 publications

Pleistocene glaciations of the SE Altai, Russia, based on geomorphological data and absolute dating of glacial deposits in Chagan reference section

Pleistocene glaciations of the SE Altai, Russia, based on geomorphological data and absolute dating of glacial deposits in Chagan reference section

Late Pleistocene and Holocene Glacier Extent in the Georgian Caucasus

Activity of Maly Aktru Glacier (Сentral Altai) and changes tree line fluctuations in its basin for a historical period

Contact Info

Product

Resources

About