Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2024Scopus SJRQ1/r/munzur/2234
  Late pleistocene glacial history of Mount Karadağ, SW Türkiye

  Bayrakdar, Cihan; Çılğın, Zeynel; Sarış, Faize; Yeşilyurt, Serdar; Keserci, Ferhat; Büyükdeniz, Yusuf; Halis, Onur; Vockenhuber, Christof; Ivy-Ochs, Susan; Akçar, Naki

  Glacial landforms in the southwestern part of the Anatolian Peninsula are found at lower elevations than the rest, suggesting that glaciers were present during the Late Pleistocene. Karadağ, located west of the Western Taurus Mountains, provides evidence of the climatic conditions that facilitated this extensive glaciation. It is characterized by numerous peaks exceeding 2300 m above sea level (asl), with the highest peak reaching 2418 m, making it the region's largest glaciation area. This high mountain mass is composed mainly of limestone and dolomite. This study focuses on the glacial landforms in Karadağ to reconstruct the Late Pleistocene glacial chronology and palaeoclimate of the Western Taurus Mountains. We employed detailed UAV photogrammetry, extensive fieldwork and mapping, surface exposure dating with cosmogenic 36Cl, meteorological measurements, palaeoglacier reconstruction, and palaeo-equilibrium line altitude (pELA) calculations. Karadağ, a topographic barrier to humid air masses from the Mediterranean Sea, ranks as the second wettest area in the Western Taurus Mountains. At a meteorological station we installed in Karadağ, an annual precipitation of 1700 mm or more was recorded, highlighting its significant precipitation. In Karadağ, we have identified two glacial valleys with a maximum length of 4.5 km and six cirques. The glaciers reached their maximum extent around 22.4 ± 2.8 ka during the Last Glacial Maximum (LGM), facilitated by the lowering of the pELA to 2090 m. During the LGM, the glaciers covered an area of approximately 3.5 km2 and reached a maximum thickness of about 140 m. Sample TRKR 10 at 2015 m probably belongs to the LGM period. Although a single sample does not conclude definitive conclusions, the presence of the moraine at its highest position indicates the maximum thickness of the glacier. Following the LGM, two more significant glacier advances occurred during the Lateglacial (15.5 ± 2.7 ka) and the Younger Dryas (12.4 ± 1.1 ka). During the late Pleistocene glaciations, and especially during the LGM, Karadağ probably received more precipitation than today, leading to the formation of glaciers at relatively lower elevations than on the Anatolian Peninsula.

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  AtıfScopus4·OpenAlex10

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• MakaleAçık Erişim2021/r/munzur/2709
  Paleoseismicity of the Ulubat Fault: Inferences on Seismic Behaviour of the Southern Branch of the North Anatolian Fault Zone, South Marmara; [Ulubat Fayı’nın Paleosismisitesi: Kuzey Anadolu Fay Zonu Güney Kolunun Deprem Davranışı Üzerine Çıkarımlar, Güney Marmara]

  Karabacak, Volkan; Sancar, Taylan; Selcuk, Azad Saglam; Buyukdeniz, Yusuf

  This article presents the results of the first paleoseismological studies conducted along the Ulubat Fault and their inferences on the earthquake behavior of the south branch of the North Anatolian Fault Zone (NAFZ). The Ulubat Fault is divided into 3 segments according to its geometric characteristics and paleoseismological behavior. Along the fault segments, at least 6 paleoearthquake event have been distinguished in the last 16 thousand years with paleoseismolgic fault excavations. The dating results correlated with the historical records show that the latest surface ruptures along the Ulubat Fault occurred with the earthquakes of <161/170 AD (I=IX), 1143 AD (M=6.0) and 1855 AD (M=7.3), respectively, and migrated to the west. Although it does not provide sufficient statistical evaluation opportunity, the paleoseismological data presented in this study proves that the segments of the NAFZ south branch do not present characteristic earthquake behavior in terms of recurrence period and this irregularity may be due to the multi-fragment geometry of the fault zone in the region.

  AtıfScopus6·OpenAlex6·TR Dizin4

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