Processing of Lake Baikal marine multichannel seismic reflection data

Hutchinson, Deborah R.; Lee, M.W.; Agena, W.F.; Golmshtok, A.J.; Moskalenko, V. N.; Karapetov, K.; Coleman, Dwight F.; Akentiev, L.G.

doi:10.3133/ofr92243

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…These deposits have uneven erosional lower boundaries and pronounced graded bedding. The lower parts of the turbidites contain (Hutchinson et al 1992b;Moore et al 1997) demonstrates the stratified sedimentary section of the Academician Ridge. The unconformities associated with the B6 and B10 sequence boundaries were interpreted from seismic data (Moore et al 1997).…”

Section: Bdp-97 Southern Basinmentioning

confidence: 96%

“…1; Hutchinson et al 1992b) shows the wellstratified sediments of the Southern Basin. The profile clearly shows the dark band of the bottom-simulating reflector (BSR) marking the lower boundary of the gashydrate layer Fig.…”

Section: Figmentioning

confidence: 99%

“…These data became essential for selecting the drilling sites of BDP. The results of seismic studies allowed previous models of rifting in Lake Baikal to be evaluated in terms of age, subsidence rates and succession of tectonic events (Hutchinson et al 1992a(Hutchinson et al , 1992bZonenshain et al 1992; Kazmin and Golmshtok 1996;Colman et al 1996a; Moore et al 1997;Scholz and Hutchinson, this volume). In this paper we make a first attempt to combine the results of the three drilling seasons with seismic data of corresponding areas.…”

Section: Introductionmentioning

confidence: 98%

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Sedimentation processes and new age constraints on rifting stages in Lake Baikal: results of deep-water drilling

Kuzmin

Karabanov

Prokopenko³

et al. 2000

International Journal of Earth Sciences

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With this paper we present a first attempt to combine the direct results on lithology, composition and age dating in the boreholes BDP-93, BDP-96 and BDP-97 with geological and seismic data from the areas where those sections were drilled. The sedimentary environments represented by the BDP boreholes are markedly different and possess characteristic lithological features. The results of the deep drilling provide the essential means for testing numerous age models used in geological reconstructions of the Lake Baikal rifting dynamics. Neither the basin-wide unconformity interpreted from seismic data, nor the interpreted change from shallow-water to deep-water facies at the boundary of the seismic stratigraphic complexes were found in the BDP-96 boreholes on Academician Ridge. Also, lithology does not support the proposed reconstructions of intense lake level fluctuations and transgressions during the Pliocene at Academician Ridge. The continuous deep-water hemipelagic sedimentation at Academician Ridge has existed for the past 5 Ma. The beginning of an intense rifting phase of the Neobaikalian sub-stage and related drastic changes in sedimentation processes were interpreted on seismic sections as the basin-wide unconformity B10. Different age estimates for this boundary ranged from Late Pliocene (3.5 Ma) to Plio-Pleistocene boundary. As shown by BDP-96 borehole, B10 is associated with a lithological change from diatomaceous ooze to dense silty clay and not with an erosional contact. The new age for this boundary in BDP-96 is approximately 2.5 Ma. This new age constraint suggests that the upper sedimentary strata of Northern Baikal (1.5-1.7 km thick) have formed during the past 2.5 Ma with average sedimentation rates of 60-70 cm/ka. The BDP-93 boreholes at Buguldeika suggest that uplift in Primorsky Range took place prior to 1.07-1.31 Ma, a date which exceeds the age of previous geological models.

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Section: Bdp-97 Southern Basinmentioning

confidence: 96%

Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Sedimentation processes and new age constraints on rifting stages in Lake Baikal: results of deep-water drilling

Kuzmin

Karabanov

Prokopenko³

et al. 2000

International Journal of Earth Sciences

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“…The possibility of GH occurrence in Baikal sediments was suggested as early as 1980 [2]; later, a BSR seismic reflector was discovered in the course of multichannel seismic survey [3]. The first GH samples were lifted in 1997 from depths of 121 and 161 m with the core of Hole BDP-97, which was drilled in the Southern Basin of Baikal [4].…”

Section: Introductionmentioning

confidence: 99%

Crystallization of authigenic carbonates in mud volcanoes at Lake Baikal

et al. 2008

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-This paper presents data on authigenic siderite first found in surface sediments from mud volcanoes in the Central (K-2) and Southern (Malen'kii) basins of Lake Baikal. Ca is the predominant cation, which substitutes Fe in the crystalline lattice of siderite. The enrichment of the carbonates in the 13 ë isotope (from +3.3 to +6.8‰ for the Malen'kii volcano and from +17.7 to +21.9‰ for K-2) results from the crystallization of the carbonates during methane generation via the bacterial destruction of organic matter (acetate). The overall depletion of the carbonates in 18 O is mainly inherited from the isotopic composition of Baikal water.

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