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Müller, Jens; Oberhänsli, Hedi; Melles, Martin; Schwab, Markus J; Hubberten, Hans-Wolfgang (2000): Geochemistry and age model of sediment core BDP96-1. PANGAEA,, Supplement to: Müller, J et al. (2000): Late Pliocene sedimentation in Lake Baikal: implications for climatic and tectonic change in SE Siberia. Palaeogeography, Palaeoclimatology, Palaeoecology, 174(4), 305-326,

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Within the framework of the Baikal Drilling Project (BDP), a 192 m long sediment core (BDP-96-1) was recovered from the Academician Ridge, a submerged topographic high between the North and Central Basins of Lake Baikal. Sedimentological, clay mineralogical and geochemical investigations were carried out on the core interval between 90 and 124 m depth, corresponding to ca. 2.4-3.4 Ma. The aim was to reconstruct the climatic and tectonic history of the continental region during the intensification of Northern Hemisphere glaciation in Late Pliocene time. A major climate change occurred in the Lake Baikal area at about 2.65 Ma. Enhanced physical weathering in the catchment, mirrored in the illite to smectite ratio, and temporarily reduced bioproduction in the lake, reflected by the diatom abundance, evidence a change towards a colder and more arid climate, probably associated with an intensification of the Siberian High. In addition, the coincident onset of distinct fluctuations in these parameters and in the Zr/Al ratio suggests the beginning of the Late Cenozoic high amplitude climate cycles at about 2.65 Ma. Fluctuations in the Zr/Al ratio are traced back to changes in the aeolian input, with high values in warmer, more humid phases due to a weaker Siberian High. Assuming that the sand content in the sediment reflects tectonic pulses, the Lake Baikal area was tectonically active during the entire investigated period, but in particular around 2.65 Ma. Tectonic movements have likely led to a gradual catchment change since about 3.15 Ma from the western towards the eastern lake surroundings, as indicated in the geochemistry and clay mineralogy of the sediments. The strong coincidence between tectonic and climatic changes in the Baikal area hints at the Himalayan uplift being one of the triggers for the Northern Hemisphere Glaciation.
Related to:
Müller, Jens (2000): Late Pliocene environmental history of SE Siberia as inferred from Lake Baikal sediments. PhD Thesis, University of Potsdam, Germany
Baikal Drilling Project (BDP)
Latitude: 53.696660 * Longitude: 108.351660
Minimum DEPTH, sediment/rock: 90.05 m * Maximum DEPTH, sediment/rock: 123.41 m
BDP96-1 * Latitude: 53.696660 * Longitude: 108.351660 * Lake water depth: 321 m * Recovery: 192 m * Location: Lake Baikal/Academician Ridge * Campaign: BDP1996 * Basis: Sampling/drilling in lake * Method/Device: Drilling/drill rig (DRILL)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Age modelAge modelkaMelles, Martin
3Silicon dioxideSiO2%Melles, Martin
4Titanium dioxideTiO2%Melles, Martin
5Aluminium oxideAl2O3%Melles, Martin
6Iron oxide, Fe2O3Fe2O3%Melles, Martin
7Manganese oxideMnO%Melles, Martin
8Magnesium oxideMgO%Melles, Martin
9Calcium oxideCaO%Melles, Martin
10Sodium oxideNa2O%Melles, MartinX-ray fluorescence (XRF)
11Potassium oxideK2O%Melles, MartinX-ray fluorescence (XRF)
12Phosphorus oxideP2O5%Melles, Martin
13BariumBamg/kgMelles, Martin
14CeriumCemg/kgMelles, Martin
15CobaltComg/kgMelles, Martin
16ChromiumCrmg/kgMelles, Martin
17CopperCumg/kgMelles, Martin
18MolybdenumMomg/kgMelles, Martin
19NiobiumNbmg/kgMelles, Martin
20NickelNimg/kgMelles, Martin
21LeadPbmg/kgMelles, Martin
22RubidiumRbmg/kgMelles, Martin
23StrontiumSrmg/kgMelles, Martin
24ThoriumThmg/kgMelles, Martin
25UraniumUmg/kgMelles, Martin
26VanadiumVmg/kgMelles, MartinX-ray fluorescence (XRF)
27YttriumYmg/kgMelles, Martin
28ZincZnmg/kgMelles, Martin
29ZirconiumZrmg/kgMelles, Martin
30Smectite/standard ratioSmec/stdMelles, MartinX-ray diffraction TEXTUR, clay fractionStandard=Molybdensulfid
31Illite/standard ratioIll/stdMelles, MartinX-ray diffraction TEXTUR, clay fractionStandard=Molybdensulfid
32Chlorite/standard ratioChl/stdMelles, MartinX-ray diffraction TEXTUR, clay fractionStandard=Molybdensulfid
33Kaolinite/standard ratioKln/stdMelles, MartinX-ray diffraction TEXTUR, clay fractionStandard=Molybdensulfid
34Quartz/total intensity ratioQz/tot intMelles, MartinX-ray diffraction TEXTUR, clay fractionStandard=Molybdensulfid
35Feldspar/standard ratioFsp/stdMelles, MartinStandard=Molybdensulfid
36SmectiteSme%Melles, MartinX-ray diffraction TEXTUR, clay fraction
37IlliteIll%Melles, MartinX-ray diffraction TEXTUR, clay fraction
38ChloriteChl%Melles, MartinX-ray diffraction TEXTUR, clay fraction
39KaoliniteKln%Melles, MartinX-ray diffraction TEXTUR, clay fraction
9282 data points

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