Conductive crust imaged in western Turkey by MT

M. Bayrak, SS Nalbant

    Research output: Contribution to journalArticle

    23 Citations (Scopus)

    Abstract

    Wide-band magnetotelluric (MT) data across the Izmir-Ankara Suture Zone ((I) over dot ASZ), the Bornova Flysch Zone and the Menderes Massif of western Turkey images shallow and deep crustal structures. Inversions of the MT data reveals two subzones of the crust with varying thickness; the viscoelastic lower crust appears as a conductive zone (< 75 ohm m), while the brittle upper crust is shown as a relatively high resistivity zone in the geoelectrical model. We also observe a very interesting twin-core structure with a very high resistivity (> 2000 ohm m) at a depth from 5 km to 25 km under the (I) over dot ASZ. A hypocentral cross-section of earthquakes along the profile shows more dense seismic activity in and around the twin-core structure. Due to this correspondence, we interpret that decoupling of the twin-core structure could be responsible for the denser seismic activity around the (I) over dot ASZ. The depth of the lithosphere/asthenosphere boundary is rather shallow in the geoelectrical model, about 45 km at the SE and NW end of the profile, and 55 km in the middle.
    LanguageEnglish
    Pages3521-3524
    JournalGeophysical Research Letters
    Volume28
    Issue number18
    Publication statusPublished - 2001

    Fingerprint

    Turkey
    crusts
    crust
    asthenosphere
    suture zone
    flysch
    profiles
    crustal structure
    lithosphere
    decoupling
    lower crust
    earthquakes
    cross section
    inversions
    broadband
    earthquake
    cross sections
    seismic activity
    inversion

    Cite this

    Bayrak, M., & Nalbant, SS. (2001). Conductive crust imaged in western Turkey by MT. Geophysical Research Letters, 28(18), 3521-3524.
    Bayrak, M. ; Nalbant, SS. / Conductive crust imaged in western Turkey by MT. In: Geophysical Research Letters. 2001 ; Vol. 28, No. 18. pp. 3521-3524.
    @article{c912885deb8c45cfa4872f80b40c6e5f,
    title = "Conductive crust imaged in western Turkey by MT",
    abstract = "Wide-band magnetotelluric (MT) data across the Izmir-Ankara Suture Zone ((I) over dot ASZ), the Bornova Flysch Zone and the Menderes Massif of western Turkey images shallow and deep crustal structures. Inversions of the MT data reveals two subzones of the crust with varying thickness; the viscoelastic lower crust appears as a conductive zone (< 75 ohm m), while the brittle upper crust is shown as a relatively high resistivity zone in the geoelectrical model. We also observe a very interesting twin-core structure with a very high resistivity (> 2000 ohm m) at a depth from 5 km to 25 km under the (I) over dot ASZ. A hypocentral cross-section of earthquakes along the profile shows more dense seismic activity in and around the twin-core structure. Due to this correspondence, we interpret that decoupling of the twin-core structure could be responsible for the denser seismic activity around the (I) over dot ASZ. The depth of the lithosphere/asthenosphere boundary is rather shallow in the geoelectrical model, about 45 km at the SE and NW end of the profile, and 55 km in the middle.",
    author = "M. Bayrak and SS Nalbant",
    year = "2001",
    language = "English",
    volume = "28",
    pages = "3521--3524",
    journal = "Geophysical Research Letters",
    issn = "0094-8276",
    number = "18",

    }

    Bayrak, M & Nalbant, SS 2001, 'Conductive crust imaged in western Turkey by MT', Geophysical Research Letters, vol. 28, no. 18, pp. 3521-3524.

    Conductive crust imaged in western Turkey by MT. / Bayrak, M.; Nalbant, SS.

    In: Geophysical Research Letters, Vol. 28, No. 18, 2001, p. 3521-3524.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Conductive crust imaged in western Turkey by MT

    AU - Bayrak, M.

    AU - Nalbant, SS

    PY - 2001

    Y1 - 2001

    N2 - Wide-band magnetotelluric (MT) data across the Izmir-Ankara Suture Zone ((I) over dot ASZ), the Bornova Flysch Zone and the Menderes Massif of western Turkey images shallow and deep crustal structures. Inversions of the MT data reveals two subzones of the crust with varying thickness; the viscoelastic lower crust appears as a conductive zone (< 75 ohm m), while the brittle upper crust is shown as a relatively high resistivity zone in the geoelectrical model. We also observe a very interesting twin-core structure with a very high resistivity (> 2000 ohm m) at a depth from 5 km to 25 km under the (I) over dot ASZ. A hypocentral cross-section of earthquakes along the profile shows more dense seismic activity in and around the twin-core structure. Due to this correspondence, we interpret that decoupling of the twin-core structure could be responsible for the denser seismic activity around the (I) over dot ASZ. The depth of the lithosphere/asthenosphere boundary is rather shallow in the geoelectrical model, about 45 km at the SE and NW end of the profile, and 55 km in the middle.

    AB - Wide-band magnetotelluric (MT) data across the Izmir-Ankara Suture Zone ((I) over dot ASZ), the Bornova Flysch Zone and the Menderes Massif of western Turkey images shallow and deep crustal structures. Inversions of the MT data reveals two subzones of the crust with varying thickness; the viscoelastic lower crust appears as a conductive zone (< 75 ohm m), while the brittle upper crust is shown as a relatively high resistivity zone in the geoelectrical model. We also observe a very interesting twin-core structure with a very high resistivity (> 2000 ohm m) at a depth from 5 km to 25 km under the (I) over dot ASZ. A hypocentral cross-section of earthquakes along the profile shows more dense seismic activity in and around the twin-core structure. Due to this correspondence, we interpret that decoupling of the twin-core structure could be responsible for the denser seismic activity around the (I) over dot ASZ. The depth of the lithosphere/asthenosphere boundary is rather shallow in the geoelectrical model, about 45 km at the SE and NW end of the profile, and 55 km in the middle.

    M3 - Article

    VL - 28

    SP - 3521

    EP - 3524

    JO - Geophysical Research Letters

    T2 - Geophysical Research Letters

    JF - Geophysical Research Letters

    SN - 0094-8276

    IS - 18

    ER -