Sedimentation rates, residence times and radionuclide inventories in Lake Baikal from 137Cs and 210Pb in sediment cores

Edgington, D.N.; Klump, J. Val; Robbins, John A.; Kusner, Yuri S.; Pampura, V.D.; Sandimirov, I. V.

doi:10.1038/350601a0

Cited by 132 publications

(55 citation statements)

References 20 publications

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“…The beginning of these episodes is indicated by the age of the base of the draped unit, 650 ka (Table 1). This estimate is older than that of Romashkin et al (1997), who based their estimate of 150 ka on sedimentation rates derived from 210 Pb data from short cores (Edgington et al 1991). The 210 Pb-derived rates are considerably higher than those derived from radiocarbon dating of longer cores (Colman et al 1996b), probably because of compaction of the very water-rich surficial sediments.…”

Section: Importance Of the Selenga Deltacontrasting

confidence: 46%

“…Sedimentation rates at three sites on the delta for about the last hundred years are approximately 0.1 cm/yr (100 cm/kyr) based on 210 Pb analyses (Edgington et al 1991). For the last 30,000 years, well documented by radiocarbon ages (Colman et al 1996b), sedimentation rates are between 15 and 19 cm/kyr at all sites (four) except for one (316) located on the crest of a fault scarp.…”

Section: Selenga Deltamentioning

confidence: 83%

“…Sedimentation rates can be calculated from many types of age estimates, ranging from long-term rates derived from broad biostratigraphic age estimates (e.g., Mats 1993) to short-term rates derived from methods such as 210 Pb and 137 Cs (Edgington et al 1991). The former provide averages that are too general for our purposes.…”

Section: Sedimentation Ratesmentioning

confidence: 99%

“…Of particular importance in discussing sedimentary environments and processes are the published chronological data (e.g., Edgington et al 1991, Edgington et al 1996Colman et al 1996b;Williams et al 1997). The purpose of this synthesis is an integrated examination of major sedimentary environments in Lake Baikal, the processes that formed them, and how they have changed over varying time intervals within the Quaternary.…”

Section: Purpose and Focusmentioning

confidence: 99%

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Quaternary Sedimentation and Subsidence History of Lake Baikal, Siberia, Based on Seismic Stratigraphy and Coring

Colman¹,

Karabanov²,

Nelson³

2003

Journal of Sedimentary Research

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The long, continuous, high-latitude, stratigraphic record of Lake Baikal was deposited in three broad sedimentary environments, defined by high-resolution seismic-reflection and coring methods: (1) turbidite depositional systems, by far the most widespread, characterizing most of the margins and floors of the main basins of the lake, (2) large deltas of major drainages, and (3) tectonically or topographically isolated ridges and banks. Holocene sedimentation rates based on radiocarbon ages vary by more than an order of magnitude among these environments, from less than about 0.03 mm/yr on ridges and banks to more than about 0.3 mm/yr on basin floors. Extrapolating these rates, with a correction for compaction, yields tentative estimates of about 25 and 11 Ma for the inception of rifting in the Central and North basins, respectively, and less than 6 Ma for the 200-m sediment depth on Academician Ridge.The Selenga Delta has the distinctive form of a classic prograding Gilbert-type delta, but its history appears to represent a complex combination of tectonism and sedimentation. The central part of the delta is underlain by prograding, shallow-water sequences, now several hundred meters below the lake surface. These deposits and much of the delta slope are mantled by fine-grained, deep-water, hemipelagic deposits whose base is estimated to be about 650,000 years old. Modern coarse-grained sediment bypasses the delta slope through fault-controlled canyons that feed large, subaqueous fans at the ends of the South and Central basins. These relations, along with abundant other evidence of recent faulting and the great depths of the Central and South basins, suggest that these two rift basins have experienced a period of unusually rapid subsidence over the last 650,000 years, during at least part of which sedimentation has failed to keep pace.

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Section: Importance Of the Selenga Deltacontrasting

confidence: 46%

Section: Selenga Deltamentioning

confidence: 83%

Section: Sedimentation Ratesmentioning

confidence: 99%

Section: Purpose and Focusmentioning

confidence: 99%

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Quaternary Sedimentation and Subsidence History of Lake Baikal, Siberia, Based on Seismic Stratigraphy and Coring

Colman¹,

Karabanov²,

Nelson³

2003

Journal of Sedimentary Research

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“…These sediments preserve signals of changes that occurred both within and outside the lake basin. Furthermore, variations in sedimentation rates within and among basins (Edgington et al 1991) provide researchers with opportunities to choose among scales of temporal resolution necessary for paleolimnologic and paleoclimatic reconstructions.…”

mentioning

confidence: 99%

A 200,000‐year, high‐resolution record of diatom productivity and community makeup from Lake Baikal shows high correspondence to the marine oxygen‐isotope record of climate change

Edlund

Stoermer

2000

Limnology & Oceanography

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Siliceous microfossil succession was analyzed in a 200,000‐yr sediment sequence recovered from the Buguldeika Saddle in Lake Baikal, Russia. Siliceous microfossil abundance varied among core depths from no preserved microfossils during inferred colder climate conditions to recent interglacial sediments containing over 300 × 106 microfossils per g dry sediment. Depth‐age microfossil assemblage zones (CA‐I to CA‐IV) identified using correspondence analysis had high correspondence to stages in the marine d18O isotope record and could be partially aligned with Late Pleistocene glacial‐interglacial cycling models from the mid‐Siberian Highland. These observations suggest that Lake Baikal phytoplankton communities have responded to climatic changes driven by insolation parameters and global ice volumes on temporal scales similar to tropical and polar oceans. Microfossil zone CA‐I (0–11.4 kyr B.P.) corresponded to the Holocene interglacial or d18O stage 1 (0–11.4 kyr B.P.), a period of higher production in Lake Baikal during a climatic optimum. Microfossil zone CA‐II (12.3–18.7 kyr B.P.) corresponded to the Sartan glaciation and d18O stage 2 (12–24 kyr B.P.). Zone CA‐III (21.3–73.2 kyr B.P.) comprised d18O stages 3 and 4. However, within zone CA‐III, subzones CA‐IIIa and IIIb (21.3–56.8 kyr B.P.) grouped were well aligned with d18O stage 3 and contained sediments deposited during the inferred Karginskiy interstade. Microfossil zone CA‐IVa (77.4–129.2 kyr B.P.) and CA‐IVb (130.3–172.5 kyr B.P.) included d18O stages 5 and 6, respectively, with sediments that were most likely deposited during the Taz glaciation and the Kazantsevo interstade. Climate‐induced changes are reflected in production differences and in community composition specificity within microfossil zones or climate stages. This suggests that climate change drives major historical successional patterns in Lake Baikal's primary producer community; changes in primary producers must have further impacted the system's entire biota.

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Paleolimnological Methods And Applications For Persistent Organic Pollutants

Blais

Muir

2002

Tracking Environmental Change Using Lake Sediments

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Sedimentation rates, residence times and radionuclide inventories in Lake Baikal from 137Cs and 210Pb in sediment cores

Cited by 132 publications

References 20 publications

Quaternary Sedimentation and Subsidence History of Lake Baikal, Siberia, Based on Seismic Stratigraphy and Coring

Quaternary Sedimentation and Subsidence History of Lake Baikal, Siberia, Based on Seismic Stratigraphy and Coring

A 200,000‐year, high‐resolution record of diatom productivity and community makeup from Lake Baikal shows high correspondence to the marine oxygen‐isotope record of climate change

Paleolimnological Methods And Applications For Persistent Organic Pollutants

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