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See detailStructure and evolution of Lake Hazar pull-apart Basin along the East Anatolian Fault
Garcia Moreno, D.; Hubert, Aurelia ULg; Moernaut, J. et al

in Basin Research (2010)

The Hazar Basin is a 25 km-long, 7 km-wide and 216 m-deep depression located on the central section of the East Anatolian Fault zone (eastern Turkey) and predominantly overlain by Lake Hazar. This basin ... [more ▼]

The Hazar Basin is a 25 km-long, 7 km-wide and 216 m-deep depression located on the central section of the East Anatolian Fault zone (eastern Turkey) and predominantly overlain by Lake Hazar. This basin has been described previously as a pull-apart basin because of its rhombic shape and an apparent fault step-over between the main fault traces situated at the southwestern and northeastern ends of the lake. However, detailed structural investigation beneath Lake Hazar has not been undertaken previously to verify this interpretation. Geophysical and sedimentological data from Lake Hazar were collected during field campaigns in 2006 and 2007. The analysis of this data reveals that the main strand of the East Anatolian Fault (the Master Fault) is continuous across the Hazar Basin, connecting the two segments previously assumed to be the sidewall faults of a pull-apart structure. In the northeastern part of the lake, an asymmetrical subsiding sub-basin, bounded by two major faults, is cross-cut by the Master Fault, which forms a releasing bend within the lake. Comparison of the structure revealed by this study with analogue models produced for transtensional step-overs suggests that the Hazar Basin structure represents a highly evolved pull-apart basin, to the extent that the previous asperity has been bypassed by a linking fault. The absence of a step-over structure at the Hazar Basin means that no significant segmentation boundary is recognised on the East Anatolian Fault between Palu and Sincik. Therefore, this fault segment is capable of causing larger earthquakes than recognised previously. [less ▲]

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See detailStructure of the East Anatolian Fault at the Hazar Basin, eastern Turkey
Garcia Moreno, David; Hubert, Aurelia ULg; Moernaut, J et al

in Cahiers du Centre Européen de Géodynamique et de Séismologie (2009), 28

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See detailStructure and evolution of a main segment boundary along the East Anatolian fault, Turkey 2008
Garcia-Moreno, D.; Hubert, Aurelia ULg; Moernaut, J et al

Conference (2008, November)

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See detailThe Hazar pull-apart along the East Anatolian Fault: Structure and active deformation
Garcia Moreno, David; Hubert, Aurelia ULg; Moernaut, J et al

in Geophysical Research Abstracts (2008, April), 10

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See detailThe Hazar pull-apart along the East Anatolian Fault: Structure and active deformation
Hubert, Aurelia ULg; Garcia, D; Moernaut, J et al

Conference (2008, January)

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See detailLacustrine record of Late Pleistocene and Holocene climate evolution, volcanism and seismic activity in Lake Puyehue (Chilean Lake District)
De Batist, M.; Fagel, Nathalie ULg; Loutre, M. F. et al

Book published by Journal of Paleolimnology (2008)

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See detailSedimentary dynamics on isolated highs in Lake Baikal: evidence from detailed high-resolution geophysical data and sediment cores
Charlet, F.; Fagel, Nathalie ULg; De Batist, M. et al

in Global and Planetary Change (2005), 46(1-4), 125-144

High- and very-high-resolution seismic data, side-scan sonar mosaics and piston cores from three isolated highs in Lake Baikal (Vydrino Shoulder, Posolsky Bank, Continent Ridge) have allowed to document ... [more ▼]

High- and very-high-resolution seismic data, side-scan sonar mosaics and piston cores from three isolated highs in Lake Baikal (Vydrino Shoulder, Posolsky Bank, Continent Ridge) have allowed to document in unprecedented detail the depositional, re-depositional and tectonic processes and to characterise the overall sedimentary environment on such isolated highs. Our data show that Vydrino Shoulder actually represents a turbidity- or underflow-sourced slope fan, with a distinct channel-levee morphology, and affected by tectonics and stratigraphic unconformities. Sediment cores contain up to 90% of terrigenous material. Posolsky Bank is a major tilted fault block, clearly affected by tectonic activity, by stratigraphic unconformities and by mass wasting along its margins. Sedimentation on its crest is undisturbed, but average sedimentation rates are high due to the influence of the nearby Selenga River. Continent Ridge is also affected by active faulting, stratigraphic unconformities and by mass-wasting along its flanks. The area receives only 30% of terrigenous input. There are no signs of sediment reworking due to bottom-currents. Our study thus shows that in comparison with other environments in Lake Baikal, the isolated highs probably hold the best potential to contain a high-quality, continuous, undisturbed and undiluted sedimentary record suitable for paleoclimate research. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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