2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland.

A. Bocin, R.A. Stephenson, A. Tryggvason, I Panea, V.I. Mocanu, F Hauser

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    The DACIA-PLAN (Danube and Carpathian Integrated Action on Processes in the Lithosphere and Neotectonics) deep seismic reflection survey was performed in August-September 2001, with the objective of obtaining new information on the deep structure of the external Carpathians nappe system and the architecture of the Tertiary/Quaternary basins developed within and adjacent to the Vrancea zone, including the rapidly subsiding Focsani Basin. The DACIA-PLAN profile is about 140 km long, having a roughly WNW-ESE direction, from near the southeast Transylvanian Basin, across the mountainous south-eastern Carpathians and their foreland to near the Danube River. A high resolution 2.5D velocity model of the upper crust along the seismic profile has been determined from a tomographic inversion of the DACIA-PLAN first arrival data. The results show that the data fairly accurately resolve the transition from sediment to crystalline basement beneath the Focsani Basin, where industry seismic data are available for correlation, at depths up to about 10 km. Beneath the external Carpathians nappes, apparent basement (material with velocities above 5.8 km/s) lies at depths as shallow as 3-4 km, which is less than previously surmised on the basis of geological observations. The first arrival travel-time data suggest that there is significant lateral structural heterogeneity on the apparent basement surface in this area, suggesting that the high velocity material may be involved in Carpathian thrusting. © 2005 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)273-291
    JournalTectonophysics
    Volume410
    DOIs
    Publication statusPublished - 2005

    Fingerprint

    seismic velocity
    neotectonics
    basements
    lithosphere
    folds (geology)
    basin
    nappe
    modeling
    arrivals
    arrival time
    profiles
    upper crust
    rivers
    travel time
    travel
    seismic reflection
    crusts
    seismic data
    sediments
    industries

    Cite this

    Bocin, A., Stephenson, R. A., Tryggvason, A., Panea, I., Mocanu, V. I., & Hauser, F. (2005). 2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland. Tectonophysics, 410, 273-291. https://doi.org/10.1016/j.tecto.2005.05.045
    Bocin, A. ; Stephenson, R.A. ; Tryggvason, A. ; Panea, I ; Mocanu, V.I. ; Hauser, F. / 2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland. In: Tectonophysics. 2005 ; Vol. 410. pp. 273-291.
    @article{ac911337e1ed4c8281b0b10e1fe48cdf,
    title = "2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland.",
    abstract = "The DACIA-PLAN (Danube and Carpathian Integrated Action on Processes in the Lithosphere and Neotectonics) deep seismic reflection survey was performed in August-September 2001, with the objective of obtaining new information on the deep structure of the external Carpathians nappe system and the architecture of the Tertiary/Quaternary basins developed within and adjacent to the Vrancea zone, including the rapidly subsiding Focsani Basin. The DACIA-PLAN profile is about 140 km long, having a roughly WNW-ESE direction, from near the southeast Transylvanian Basin, across the mountainous south-eastern Carpathians and their foreland to near the Danube River. A high resolution 2.5D velocity model of the upper crust along the seismic profile has been determined from a tomographic inversion of the DACIA-PLAN first arrival data. The results show that the data fairly accurately resolve the transition from sediment to crystalline basement beneath the Focsani Basin, where industry seismic data are available for correlation, at depths up to about 10 km. Beneath the external Carpathians nappes, apparent basement (material with velocities above 5.8 km/s) lies at depths as shallow as 3-4 km, which is less than previously surmised on the basis of geological observations. The first arrival travel-time data suggest that there is significant lateral structural heterogeneity on the apparent basement surface in this area, suggesting that the high velocity material may be involved in Carpathian thrusting. {\circledC} 2005 Elsevier B.V. All rights reserved.",
    author = "A. Bocin and R.A. Stephenson and A. Tryggvason and I Panea and V.I. Mocanu and F Hauser",
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    Bocin, A, Stephenson, RA, Tryggvason, A, Panea, I, Mocanu, VI & Hauser, F 2005, '2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland.' Tectonophysics, vol. 410, pp. 273-291. https://doi.org/10.1016/j.tecto.2005.05.045

    2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland. / Bocin, A.; Stephenson, R.A.; Tryggvason, A.; Panea, I; Mocanu, V.I.; Hauser, F.

    In: Tectonophysics, Vol. 410, 2005, p. 273-291.

    Research output: Contribution to JournalArticleAcademicpeer-review

    TY - JOUR

    T1 - 2.5D seismic velocity modelling in the south-eastern Romanian Carpathians Orogen and its foreland.

    AU - Bocin, A.

    AU - Stephenson, R.A.

    AU - Tryggvason, A.

    AU - Panea, I

    AU - Mocanu, V.I.

    AU - Hauser, F

    PY - 2005

    Y1 - 2005

    N2 - The DACIA-PLAN (Danube and Carpathian Integrated Action on Processes in the Lithosphere and Neotectonics) deep seismic reflection survey was performed in August-September 2001, with the objective of obtaining new information on the deep structure of the external Carpathians nappe system and the architecture of the Tertiary/Quaternary basins developed within and adjacent to the Vrancea zone, including the rapidly subsiding Focsani Basin. The DACIA-PLAN profile is about 140 km long, having a roughly WNW-ESE direction, from near the southeast Transylvanian Basin, across the mountainous south-eastern Carpathians and their foreland to near the Danube River. A high resolution 2.5D velocity model of the upper crust along the seismic profile has been determined from a tomographic inversion of the DACIA-PLAN first arrival data. The results show that the data fairly accurately resolve the transition from sediment to crystalline basement beneath the Focsani Basin, where industry seismic data are available for correlation, at depths up to about 10 km. Beneath the external Carpathians nappes, apparent basement (material with velocities above 5.8 km/s) lies at depths as shallow as 3-4 km, which is less than previously surmised on the basis of geological observations. The first arrival travel-time data suggest that there is significant lateral structural heterogeneity on the apparent basement surface in this area, suggesting that the high velocity material may be involved in Carpathian thrusting. © 2005 Elsevier B.V. All rights reserved.

    AB - The DACIA-PLAN (Danube and Carpathian Integrated Action on Processes in the Lithosphere and Neotectonics) deep seismic reflection survey was performed in August-September 2001, with the objective of obtaining new information on the deep structure of the external Carpathians nappe system and the architecture of the Tertiary/Quaternary basins developed within and adjacent to the Vrancea zone, including the rapidly subsiding Focsani Basin. The DACIA-PLAN profile is about 140 km long, having a roughly WNW-ESE direction, from near the southeast Transylvanian Basin, across the mountainous south-eastern Carpathians and their foreland to near the Danube River. A high resolution 2.5D velocity model of the upper crust along the seismic profile has been determined from a tomographic inversion of the DACIA-PLAN first arrival data. The results show that the data fairly accurately resolve the transition from sediment to crystalline basement beneath the Focsani Basin, where industry seismic data are available for correlation, at depths up to about 10 km. Beneath the external Carpathians nappes, apparent basement (material with velocities above 5.8 km/s) lies at depths as shallow as 3-4 km, which is less than previously surmised on the basis of geological observations. The first arrival travel-time data suggest that there is significant lateral structural heterogeneity on the apparent basement surface in this area, suggesting that the high velocity material may be involved in Carpathian thrusting. © 2005 Elsevier B.V. All rights reserved.

    U2 - 10.1016/j.tecto.2005.05.045

    DO - 10.1016/j.tecto.2005.05.045

    M3 - Article

    VL - 410

    SP - 273

    EP - 291

    JO - Tectonophysics

    JF - Tectonophysics

    SN - 0040-1951

    ER -