2014 GSA Annual Meeting in Vancouver, British Columbia (19–22 October 2014)

Paper No. 208-26
Presentation Time: 3:15 PM

UNDERSTANDING THE ROLE OF STRIKE-SLIP FAULTING AS OCEANS CLOSE, NORTH CENTRAL TURKEY


PETTIT, Bridget S., Geological Sciences, The University of Texas at Austin, 7 Las Flores, Aliso Viejo, CA 92656, CATLOS, Elizabeth J., Geological Sciences, University of Texas at Austin, Jackson School of Geosciences, Austin, TX 78712 and ELLIOTT, Brent, The Bureau of Economic Geology, The University of Texas at Austin, University Station Box X, Austin, TX 78713, bridgetpettit@utexas.edu

The goal of this project is to compile and interpret remotely sensed imagery and produce maps intended to lessen hazards associated with Turkey’s North Anatolian Shear Zone (NASZ). These hazards include landslides and rock falls due to seismic activity. The NASZ contains the North Anatolian Fault, a right lateral strike slip fault extending approximately 1200 km in length. The NASZ is speculated to have accommodated from 25 to 110 km of displacement, depending on location. In the proposed field area, the shear zone is comprised of five major strands: Erbaa, Tosya-Ladik, Niksar-Kalekoy, Erzincan, and Tasova-Tekke faults with a combined estimated displacement of ~80 km. These strands, although named after villages and towns along the NASZ, do not have consistent names in the geological literature. The range of names highlights the fact that many details of these structures are unknown. By looking at surface expressions, it is possible to identify the extent of each fault and their relationship to one another; the resulting maps help to understand the tectonic history and identify geohazards of the region. To produce these maps, aerial photographs, Digital Elevation Models (DEMs), geological maps, and strike and dip data of the field area are compiled. Locations, extent, and type of faulting are then proposed based on data visible in the maps. The final step is to visit the proposed locations in outcrop and update the map according to the results. As an outcome, a series of maps have been produced that focus in the region around the town of Amasya.