Open AccessTectonics of the Marmara Sea region of Turkey: new evidence from microearthquake fault plane solutions
Author(s) -
Evans Russ,
Asudeh Isa,
Crampin Stuart,
Üçer S. Balamir
Publication year - 1985
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1985.tb05155.x
Subject(s) - geology , seismology , north anatolian fault , induced seismicity , fault plane , tectonics , fault (geology) , lineation , structural geology , slip (aerodynamics) , seismotectonics , physics , thermodynamics
Summary. Composite and single‐event fault plane solutions for microearthquakes in the Izmit Bay area of the Marmara Sea indicate right‐lateral strike‐slip motion and tension on this extension of the North Anatolian Fault. This interpretation is consistent with teleseismically determined fault‐plane solutions obtained for large earthquakes on the Marmara Sea seismic lineation. Consideration of the microplate geometry of north‐western Turkey, inferred from seismicity as well as earthquake mechanisms, suggests that the region comprises two seismotectonic units with differing styles of deformation. The (Anatolid) structures of south‐ and central‐western Anatolia are undergoing major extension, whereas the (Pontid) structures of the Marmara Sea region are being sheared, resulting in a mixed regime of both strike‐slip and extensional faulting.