Kinematically consistent, elastic block model for the eastern Mediterranean constrained by GPS measurements

I use a Global Positioning System (GPS) velocity field to constrain block models of the eastern Mediterranean and surrounding regions that account for the angular velocities of constituent blocks and elastic strain accumulation on block-bounding faults in the interseismic period. Kinematically consistent fault slip rates and locking depths are estimated by this method. Eleven blocks are considered, including the major plates, based largely on previous geodetic, seismic, and geologic studies: Eurasia (EU), Nubia (NU), Arabia (AR), Anatolia (AN), Caucasus (CA), South Aegea (AE), Central Greece (GR), North Aegea (NE), Southeast Aegea (SE), Macedonia (MA), and Adria (AD). Two models are presented, one in which the best-fitting locking depth for the entire region (-15 km) is used on all boundaries (Model A), and one in which shallower locking depths are used on the Marmara Fault, the Hellenic and Cyprus Arcs, and in the Greater Caucasus (Model B), based on a consideration of locally best-fitting locking depths. An additional block, Black Sea (BS), is postulated in a third model. The models are in fair to good agreement with the results of previous studies of plate motion, fault slip rates, seismic moment rates and paleomagnetic rotations. Notably, some block pairs in the Aegean region have Euler poles on, or near to, their common boundaries, in qualitative agreement with so-called pinned block models, e.g., for the transfer of slip from the right-lateral North Anatolian Fault system to a set of left-lateral and normal faults in central and northern Greece (McKenzie and Jackson, 1983; Taymaz et al., 1991a; Goldsworthy et al., 2002).

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2003

Author dc:creator

• Lawrence, Shawn A. (Shawn Adam), 1975-

Advisor dc:contributor.advisor

• Bradford H. Hager.

• Earth, Atmospheric, and Planetary Sciences.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/54506

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/54506