HR: 1340h
AN: T53B-0485    [Abstracts]
TI: Macrobrecciation at a Plate Boundary: The Iskenderun Block
AU: * Sine, C R
AF: Northern Arizona University, Department of Geology Box 4099 Northern Arizona University , Flagstaff, AZ 86011-4099 United States
AU: Brumbaugh, D S
EM: david.brumbaugh@nau.edu
AF: Northern Arizona University, Department of Geology Box 4099 Northern Arizona University , Flagstaff, AZ 86011-4099 United States
AB: The area of intersection of the East Anatolian and the Dead Sea fault zones in southeast Turkey and northwest Syria represents the intersection of three tectonic Plates: African,Anatolian, and Arabian. Widespread deformation occurs in the area of the plate triple junction including the presence of multiple faults bounding plate fragments along the plate tectonic boundaries. Earthquake fault plane solutions and epicenter clustering in the area of the intersectiong fault zones has been used to identify plate fragments. This study delineates a plate boundary near the mouth of the Gulf of Iskenderun based on linear trends in epicenters and the orientation of fault plane solution nodal planes. The boundary located near the mouth of the Gulf of Iskenderun is proposed to be the southern boundary of a plate fragment roughly the size of the state of Delaware, herein named the Iskenderun block. Plate motions and moho depths suggest that the Iskenderun block is a promontory that was originally joined to the African plate and has been caught up in the deformation at the Anatolian-Arabian-African triple junction and has been subsequently torn from the African plate.
DE: 7230 Seismicity and seismotectonics
DE: 8107 Continental neotectonics
DE: 1208 Crustal movements--intraplate (8110)
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting