TY - JOUR
T1 - Forearc high uplift by lower crustal flow during growth of the Cyprus-Anatolian margin
AU - Fernández-Blanco, David
AU - Mannu, Utsav
AU - Bertotti, Giovanni
AU - Willett, Sean D.
N1 - Accepted Author Manuscript
PY - 2020
Y1 - 2020
N2 - We present a model for the dynamic formation of the forearc high of southern Anatolia where sedimentation in the forearc basin leads to thermally-activated deformation in the lower crust. Our thermo-mechanical models demonstrate that forearc sedimentation increases the temperature of the underlying crust by “blanketing” the heat flux and increasing Moho depth. Deformation switches from frictional to viscous with a higher strain rate led by increased temperature. Viscous deformation changes large-wavelength subsidence into coeval, short-wavelength uplift and subsidence. Models show that forearc highs are intrinsic to accretionary wedges and can grow dynamically and non-linearly at rates dependent on sediment accretion, sedimentation and temperature. The mechanism explains the uplift of the southern margin of the Central Anatolian Plateau and the Neogene vertical motions and upper-plate strain in the Anatolian margin along Central Cyprus. This system is analogous to forearc highs in other mature accretionary margins, like Cascadia, Lesser Antilles or Makran.
AB - We present a model for the dynamic formation of the forearc high of southern Anatolia where sedimentation in the forearc basin leads to thermally-activated deformation in the lower crust. Our thermo-mechanical models demonstrate that forearc sedimentation increases the temperature of the underlying crust by “blanketing” the heat flux and increasing Moho depth. Deformation switches from frictional to viscous with a higher strain rate led by increased temperature. Viscous deformation changes large-wavelength subsidence into coeval, short-wavelength uplift and subsidence. Models show that forearc highs are intrinsic to accretionary wedges and can grow dynamically and non-linearly at rates dependent on sediment accretion, sedimentation and temperature. The mechanism explains the uplift of the southern margin of the Central Anatolian Plateau and the Neogene vertical motions and upper-plate strain in the Anatolian margin along Central Cyprus. This system is analogous to forearc highs in other mature accretionary margins, like Cascadia, Lesser Antilles or Makran.
KW - accretionary wedge
KW - Central Anatolian Plateau
KW - orogenic plateau
KW - outer-arc high
KW - plateau margin
UR - http://www.scopus.com/inward/record.url?scp=85086078833&partnerID=8YFLogxK
U2 - 10.1016/j.epsl.2020.116314
DO - 10.1016/j.epsl.2020.116314
M3 - Article
AN - SCOPUS:85086078833
SN - 0012-821X
VL - 544
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
M1 - 116314
ER -