Seafloor expression and shallow structure of a fold-and-thrust system, Isfjorden, west Spitsbergen. Blinova, M., Faleide, J. I., Gabrielsen, R. H., & Mjelde, R. Polar Research, 31(1):11209, January, 2012. Publisher: Routledge _eprint: https://doi.org/10.3402/polar.v31i0.11209![Seafloor expression and shallow structure of a fold-and-thrust system, Isfjorden, west Spitsbergen [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex A detailed map of the structure of the west Spitsbergen fold-and-thrust belt in the Isfjorden area, Spitsbergen, is presented. The map was constructed from a dense grid of two-dimensional multichannel reflection seismic and bathymetric data. Joint interpretation of two data sets allowed a comparison of tectonic structures detected along the uppermost parts of the seismic sections and those reflected in the morphology of the seafloor. Three major, predominantly north-west–south-east striking faults were identified. The westernmost fault (T1) is a hinterland-directed (most likely out of sequence) thrust, while the central and easternmost faults (T2 and T3) are foreland-directed (in-sequence thrusts). The thrusts divide Isfjorden into three subareas. Subarea 1 is bounded by thrust faults T1 and T2 and comprises Tertiary rocks surrounded by Jurassic–Cretaceous strata. The structural signature of Subarea 1 is that of a system of hinterland- and foreland-directed thrust faults, resulting in a seafloor relief characterized by parallel ridges and troughs. Subarea 2 is limited by thrust faults T2 and T3 and shows Jurassic–Cretaceous outcrops on the seafloor. Subarea 3 is situated east of the main thrust fault T3 and mainly involves outcrops of Triassic–Jurassic rocks. Together, Subareas 2 and 3 are dominated by foreland-directed, north-west–south-east and NNW–SSE-striking thrusts that are hardly detectable in bathymetric data.
@article{blinova_seafloor_2012,
title = {Seafloor expression and shallow structure of a fold-and-thrust system, {Isfjorden}, west {Spitsbergen}},
volume = {31},
issn = {null},
url = {https://doi.org/10.3402/polar.v31i0.11209},
doi = {10.3402/polar.v31i0.11209},
abstract = {A detailed map of the structure of the west Spitsbergen fold-and-thrust belt in the Isfjorden area, Spitsbergen, is presented. The map was constructed from a dense grid of two-dimensional multichannel reflection seismic and bathymetric data. Joint interpretation of two data sets allowed a comparison of tectonic structures detected along the uppermost parts of the seismic sections and those reflected in the morphology of the seafloor. Three major, predominantly north-west–south-east striking faults were identified. The westernmost fault (T1) is a hinterland-directed (most likely out of sequence) thrust, while the central and easternmost faults (T2 and T3) are foreland-directed (in-sequence thrusts). The thrusts divide Isfjorden into three subareas. Subarea 1 is bounded by thrust faults T1 and T2 and comprises Tertiary rocks surrounded by Jurassic–Cretaceous strata. The structural signature of Subarea 1 is that of a system of hinterland- and foreland-directed thrust faults, resulting in a seafloor relief characterized by parallel ridges and troughs. Subarea 2 is limited by thrust faults T2 and T3 and shows Jurassic–Cretaceous outcrops on the seafloor. Subarea 3 is situated east of the main thrust fault T3 and mainly involves outcrops of Triassic–Jurassic rocks. Together, Subareas 2 and 3 are dominated by foreland-directed, north-west–south-east and NNW–SSE-striking thrusts that are hardly detectable in bathymetric data.},
number = {1},
urldate = {2020-04-21},
journal = {Polar Research},
author = {Blinova, Maria and Faleide, Jan Inge and Gabrielsen, Roy H. and Mjelde, Rolf},
month = jan,
year = {2012},
note = {Publisher: Routledge
\_eprint: https://doi.org/10.3402/polar.v31i0.11209},
keywords = {Isfjorden, Svalbard, seafloor morphology, seismic interpretation, shallow structures, west Spitsbergen fold-and-thrust belt},
pages = {11209},
}
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