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| Karlıova Triple Junction | |
|---|---|
| Name | Karlıova Triple Junction |
| Region | Eastern Anatolia |
| Type | Triple junction |
| Tectonic plates | Anatolian Plate; Eurasian Plate; Arabian Plate |
Karlıova Triple Junction The Karlıova Triple Junction is a tectonic junction in eastern Turkey where the boundaries of the Anatolian Plate, the Eurasian Plate, and the Arabian Plate meet. It lies within the bounds of Bingöl Province near the town of Karlıova, forming a principal structural node that controls regional faulting, seismicity, crustal deformation, and volcanism across Eastern Anatolia and the Pontic Mountains–Taurus Mountains corridor.
The triple junction occupies a key position at the terminus of the North Anatolian Fault, the origin of the East Anatolian Fault, and the northeastern limit of the Arabian Plate indentation against the Eurasian Plate. Regional interactions involve the Hellenic Arc, the Anatolian Fault System, and boundary segments oriented toward Caucasus structures such as the Greater Caucasus and Lesser Caucasus. Nearby administrative and geographic references include Bingöl, Erzurum, Muş Province, Diyarbakır, and the historical regions of Armenia (historical), Kurdistan (greater) and Pontus (region).
Plate convergence here is driven by the collision of the Arabian Plate with the Eurasian Plate, which forces westward escape of the Anatolian Plate along strike-slip systems including the North Anatolian Fault and the East Anatolian Fault. The junction links crustal domains influenced by the Anatolian Orogeny, Alpine orogeny, and remnant microcontinents such as the Tauride Microcontinent and the Caucasus Block. Lithospheric structure has been imaged in seismic tomographic studies coordinated by organizations like the General Directorate of Mineral Research and Exploration (MTA) and international projects involving the European-Mediterranean Seismological Centre, the US Geological Survey, and the IRIS Consortium. Geodynamic models reference datasets from GPS networks, InSAR campaigns, and paleoseismological trenching near faults like the Pütürge segment.
The junction is characterized by compound fault geometries, including left-lateral and right-lateral strike-slip segments, thrusts, and pull-apart basins. Key mapped structures include the western termination of the North Anatolian Fault, the northeastern initiation of the East Anatolian Fault, and transfer zones linking to the Varto Fault and Bingöl Fault. Volcanic and magmatic provinces connected to the setting include products of the Quaternary volcanism in Nemrut (volcano), Süphan, and the Ararat volcanic complex to the east. Stratigraphy records interactions among units such as the Neogene basins of Muş Basin, Paleozoic–Mesozoic sequences, and Cenozoic molasse deposits tied to the Anatolian uplift.
The region exhibits high seismic hazard with historical and instrumental earthquakes documented by archives of the Ottoman Empire and modern catalogs from the Turkish Disaster and Emergency Management Authority (AFAD), EMSC, and USGS. Notable seismic events that affected nearby areas include large ruptures on the North Anatolian Fault such as the 1939 Erzincan earthquake and later sequences propagating westward, as well as earthquakes recorded near Bingöl and Muş. Paleoseismic trenches and slackwater deposits studied by teams from institutions like Boğaziçi University, Istanbul Technical University, and Middle East Technical University reveal recurrence intervals and surface rupture behavior informing probabilistic seismic hazard models used by the World Bank and UNDRR in regional risk assessments.
Surface expression includes scarped fault lines, linear valleys, sag ponds, and offset river channels on streams like the Karasu River and tributaries of the Murad River and Keban Reservoir catchment. The high-relief setting integrates glacial and fluvial landforms across the Taurus Mountains foothills and plateaus of Eastern Anatolia Province. Landscape evolution has been influenced by Quaternary climate shifts, producing alluvial fans, terraces, and mass-wasting features cataloged by provincial agencies such as the General Directorate of Forestry and academic groups from Atatürk University.
Research efforts are multidisciplinary, involving seismology, structural geology, geodesy, and volcanology, with contributions from the MTA, AFAD, Boğaziçi University Kandilli Observatory and Earthquake Research Institute, Istanbul Technical University Department of Geology, and international collaborators including ETH Zurich, GFZ Potsdam, and CNRS. Monitoring infrastructure includes permanent GNSS stations, seismic networks, and remote sensing by Copernicus missions and agencies like the European Space Agency. Key datasets and simulation tools are produced in partnership with the International Seismological Centre and computational groups using software frameworks such as SEISAN and finite-element platforms to model stress transfer and rupture propagation.
The junction’s seismicity affects populated centers including Bingöl, Muş, Erzurum, and transport corridors such as the Ankara–Kars railway and highways linking to Diyarbakır. Infrastructure vulnerabilities have prompted retrofitting initiatives supported by agencies like EU Civil Protection Mechanism partners and national programs under Turkish Statistical Institute planning. Disaster response and resilience projects involve non-governmental organizations such as the Turkish Red Crescent, international donors including the World Bank and European Bank for Reconstruction and Development, and academic outreach through institutions like Hacettepe University to improve building codes and community preparedness.
Category:Geology of Turkey Category:Seismotectonics Category:Plate tectonics