Bati Karadeniz Havzasinin Guney Bolumunde Akcakoca-Cide Aciklarinda Sikismali Tektonik Rejime Ait Yeni Bulgular

TL;DR

This study investigates the active tectonic and fault structures in the Western Black Sea Basin's southern part near Akcakoca-Cide, using seismic and geological data to reveal ongoing compressional tectonics and recent earthquake activity.

Contribution

It provides new geological and seismic evidence for active thrusting and fault structures in the region, integrating seismic reflection data with geological sections to understand tectonic processes.

Findings

Confirmation of active reverse faulting similar to historical earthquakes

Identification of fault structures formed by compressional tectonics

Support for N-S directional compressional regime in the region

Abstract

The earthquake occurred on October 15, 2016 (Ml=5.0) re-attracted attention to the tectonic activity of Western Black Sea Basin. The focal mechanism solution of this earthquake indicates reverse faulting, similar to the Bartin Earthquake of September 3, 1968 (MS=6.6), which is the strongest instrumentally recorded earthquake along the Turkish margin of Black Sea, and reveals another seismological evidence for the active thrusting in the region. In this study, the fault structures that considered to be formed by the effect of compressional tectonic regime and the structures formed by the activities of these faults beneath the shelf and slope areas between the region offshore Akcakoca-Cide at the southern part of the Western Black Sea Basin revealed by using marine seismic reflection data and the composite well log data. By means of the geological sections in previous geological studies, the land-offshore geological sections were prepared and findings about the continuation of the geological features from land to offshore in the study area were presented. These geological sections developed for the study area and the geological features recognized from the seismic migration sections, support the presence of the N-S directional compressional tectonic regime in Western Black Sea.