Turkish Journal of Earth Sciences最新文献_第5页

Foraminiferal micropaleontology of the Harami Formation (Elazığ, Eastern Turkey), and reassessment of its age based on larger benthic foraminifera 哈拉米组有孔虫微古生物学(Elazığ，土耳其东部)，并基于更大底栖有孔虫重新评估其年龄

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1857

Sibel Kayğılı

引用次数: 0

Identification of transtensional and transpressional features in the Sea of Marmara using onshore-offshore seismic and geodetic data 利用陆上-海上地震和大地测量资料识别马尔马拉海的张拉和张拉特征

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1846

Zeynep Coşkun, Ali̇ Pinar

{"title":"Identification of transtensional and transpressional features in the Sea of Marmara using onshore-offshore seismic and geodetic data","authors":"Zeynep Coşkun, Ali̇ Pinar","doi":"10.55730/1300-0985.1846","DOIUrl":"https://doi.org/10.55730/1300-0985.1846","url":null,"abstract":": The scope of the study is to determine transtensional and transpressional features along the North Anatolian Fault beneath the Sea of Marmara, using seismic and geodetic data. For this purpose, focal mechanisms of small size NAF earthquakes, recorded by broadband stations and OBSs, have been derived and used as a tool to identify the transtensional and transpressional features. The focal mechanisms of: (1) small to moderate size events are obtained by the CMT inversion technique of Kuge (2003), using onshore waveform data from 2002–2015, (2) micro-earthquakes are obtained using the technique of Horiuchi (2015), using offshore waveform data recorded by 15 OBS stations from 2015–2016. Furthermore, published GPS velocities are used to determine the style of faulting and strain rates. The geodetic horizontal crustal strain rates are determined at equally spaced grid points by interpolating northing and easting components of the 112 GPS vectors from 1994–2013. The results indicate that extensional and strike-slip style deformation dominates the region, while contractional features are rare. Significant extension is observed in Çınarcık Basin and the area between Marmara Island and Central Basin. Yalova-Çınarcık region shows predominantly N-S extension while the Çınarcık Basin events show NE-SW extension. Compressional or transpressional features are derived to the west of Marmara Island and Ganos and in the Central segment extending from Central Basin toward Çınarcık Basin. The GPS strain rate results point out the highest values, 24 × 10 –8 /year, in Çınarcık Basin, while the lowest values, 11 × 10 –8 /year, are observed in Central Marmara. The highest strain rates in both edges of the fault segment in Çınarcık Basin can be indicative of a steadily creeping fault segment. In turn, lower strain rates in the Central Marmara region suggest that this segment of the NAF is locked.","PeriodicalId":49411,"journal":{"name":"Turkish Journal of Earth Sciences","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48620556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deciphering the magma storage conditions and preeruptive processes at Cumaçay: a Plio-Quaternary volcanic eruption center in Eastern Anatolia, Turkey 解读Cumaçay的岩浆储存条件和喷发前过程：土耳其安纳托利亚东部的上新世-第四纪火山喷发中心

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1837

Yavuz Özdemir, Ayhan Özdemi̇r

{"title":"Deciphering the magma storage conditions and preeruptive processes at Cumaçay: a Plio-Quaternary volcanic eruption center in Eastern Anatolia, Turkey","authors":"Yavuz Özdemir, Ayhan Özdemi̇r","doi":"10.55730/1300-0985.1837","DOIUrl":"https://doi.org/10.55730/1300-0985.1837","url":null,"abstract":": We investigate the geology and petrology of Cumaçay, one of the Plio-Quaternary eruption centers of postcollisional volcanism in Eastern Turkey, using a combination of geochronology, bulk-rock geochemistry, thermobarometry, and thermodynamic simulations. Our new K-Ar ages reveal an age of 3.5–0.97 Ma for the eruptive products, which spread around an area of approximately 1000 km 2 . Mineral-melt equilibria for olivine, orthopyroxene, clinopyroxene, and plagioclase allow estimation of crystallization pressures, and temperatures indicate two separate crustal storage of crystallization at 14–28 km and 5–15 km. The temperature estimation from diverse methods ranges from 954 °C to 1224 °C. Thermodynamic modelings using Magma Chamber Simulator (MCS) at a representative pressure (5 kbar) imply that the assimilation and crustal contamination (AFC) resulted in evolved melts with various SiO 2 contents at mid to lower crustal depths. Calculated wide range of temperatures, compositional variety from evolved members, and MCS recharge simulation at a representative pressure (2.5 kbar) reveal that the magma mixing between contrasted melts characterizes the final chemical dispersal of the erupted lavas.","PeriodicalId":49411,"journal":{"name":"Turkish Journal of Earth Sciences","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42430453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Land subsidence due to natural gas extraction in the Thrace basin (NW Turkey) and its influence on the North Anatolian fault under the Marmara Sea 土耳其西北部色雷斯盆地天然气开采引起的地面沉降及其对马尔马拉海下北安那托利亚断裂的影响

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1852

Tohid Nozadkhalil, Z. Çakır, S. Ergintav, U. Doğan, T. Walter

引用次数: 0

Evidence for surface rupture of the 1939 Erzincan earthquake based on field data and paleoseismology on the Ezinepazarı Fault (North Anatolian Fault Zone, Central Anatolia) 基于现场资料和北安纳托利亚断裂带ezinepazardi断裂带古地震学的1939年埃尔津詹地震地表破裂证据

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1829

Fikret Koçbulut

{"title":"Evidence for surface rupture of the 1939 Erzincan earthquake based on field data and paleoseismology on the Ezinepazarı Fault (North Anatolian Fault Zone, Central Anatolia)","authors":"Fikret Koçbulut","doi":"10.55730/1300-0985.1829","DOIUrl":"https://doi.org/10.55730/1300-0985.1829","url":null,"abstract":": The Ezinepazarı Fault (EPF) is an active segment that restricts the Niksar Basin in the central part of the North Anatolian Fault Zone and has been the source of the devastating Mw 8.0 earthquake in the last 100 years. Traces of the surface rupture of the EPF, which occurred in AD 1939, can still be observed in the field today as a right-lateral strike-slip character. While paleoseismological studies were mostly focused on the western part of the North Anatolian Fault Zone (NAFZ) in previous studies, the studies on the central and eastern parts of the NAFZ are rarely addressed. In this context, trench-based paleoseismology studies were carried out on the surface rupture traces in order to determine both historical/prehistoric earthquakes caused by the fault and the Quaternary period characteristics of the EPF. According to the data obtained, at least two historical earthquake activities have been detected besides the last 1939 earthquake on the EPF. Accordingly, the first and second events occurred in E1: 5871 ± 2300 BP and E2: 1651 ± 128 BP, respectively. When the determined data are compared with the historical earthquake catalogs, it is concluded that Event 2 (E2) can be correlated with the AD 343 Niksar earthquake; thus, the EPF has an irregular earthquake recurrence interval.","PeriodicalId":49411,"journal":{"name":"Turkish Journal of Earth Sciences","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48275083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micropaleontological findings and absolute ages mark the termination of the Last Glacial Maximum in the Eastern Mediterranean Region: New electron spin resonance data from Gediz Delta (Western Turkey) 微观天文学发现和绝对年龄标志着东地中海地区最后一次冰川盛期的结束：来自格迪兹三角洲（土耳其西部）的新电子自旋共振数据

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1859

Ekin Gökçe Benli, Hülya Aslin, I. Işintek, Birol Engin, B. Geçkin

{"title":"Micropaleontological findings and absolute ages mark the termination of the Last Glacial Maximum in the Eastern Mediterranean Region: New electron spin resonance data from Gediz Delta (Western Turkey)","authors":"Ekin Gökçe Benli, Hülya Aslin, I. Işintek, Birol Engin, B. Geçkin","doi":"10.55730/1300-0985.1859","DOIUrl":"https://doi.org/10.55730/1300-0985.1859","url":null,"abstract":": Sediments and fossil content of Gediz Delta (Eastern Aegean Sea- İzmir) were examined from the samples collected from three drilling cores from the west (seaward) to east (landward) of the delta. Each drilling core contains Quarternary marine deposits with a marine fauna of foraminifers, bivalves, gastropods, echinoids, and ostracods at the bottom and Quaternary continental delta deposits at the top. According to our Electron Spin Resonance (ESR) age model marine sediments of the Aegean Sea started to cover the western Gediz Delta area before 19.9 ka (thousand years). Following the Last Glacial Maximum (LGM), after the transgression due to deglaciation occurred 15.3 ka ago, the coastline progressed 15–20 km eastward and covered the entire delta area. At the end of the LGM, as a result of the overflow of Manisa Gediz Lake depending on the deglaciation in Western Anatolia, and its flow from the Emiralem Strait to the İzmir Bay, the continental deposits reaching the West Gediz Delta region are younger than 11.4 ka.","PeriodicalId":49411,"journal":{"name":"Turkish Journal of Earth Sciences","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49312768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Contemporary Velocity Field for Turkey Inferred from Combination of a Dense Network of Long Term GNSS Observations 从密集的全球导航卫星系统长期观测网络组合推断土耳其当代速度场

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1844

A. İ. Kurt, Ali Değer Özbakır, Ayhan Cingöz, S. Ergintav, U. Doğan, Seda Özarpacı

引用次数: 7

Obituary Prof. Dr. Ercan Özcan Ercan教授博士Özcan

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1834

A. Okay, D. Altıner, Gyorgy Less

引用次数: 0

Internal deformation of continental blocks within converging plates: insights from the Ovacık Fault (Anatolia, Türkiye) 收敛板块内大陆块体的内部变形:来自Ovacık断层(安纳托利亚，土耳其)的启示

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1849

Cengiz Zabcı, T. Sançar, D. Tikhomirov, S. Ivy‐Ochs, C. Vockenhuber, A. Friedrich, Müge Yazıcı, N. Akçar

{"title":"Internal deformation of continental blocks within converging plates: insights from the Ovacık Fault (Anatolia, Türkiye)","authors":"Cengiz Zabcı, T. Sançar, D. Tikhomirov, S. Ivy‐Ochs, C. Vockenhuber, A. Friedrich, Müge Yazıcı, N. Akçar","doi":"10.55730/1300-0985.1849","DOIUrl":"https://doi.org/10.55730/1300-0985.1849","url":null,"abstract":": The active tectonics of Anatolia is mostly characterized by its westward motion with respect to Eurasia between the Hellenic subduction in the west and Arabia-Eurasia continental collision in the east. Although most of the deformation is suggested to be confined along Anatolia’s boundary elements, viz. the North and East Anatolian shear zones, recent studies indicate a higher magnitude of internal strain accumulation, especially along the parallel/subparallel strike-slip faults of its central province. We present the first morphochronology-based slip rate estimate for one of these strike-slip structures, the Ovacık Fault, by using cosmogenic 36 Cl dating of offset fluvial deposits. At the Köseler Site (39.3643°N, 39.1688°E), two faulted risers, bounding the alluvial fan with its subplanar surface (NF1/NF1’) and the inset terrace tread (NF1/T2), are offset 19–24 and 15–22 m, respectively. The scattered surface ages and variability of 36 Cl concentrations in depth profiles suggest strong evidence for inheritance in alluvial fan and terrace deposits; thus, we used modelled depth-profile ages for both surfaces. The modelled ages 8–10 ka for NF1 and 6–8 ka for T2 yield slip-rate estimates 2.4 +0.5/–0.4 mm/a and 2.8 +0.7/–0.7 mm/a, respectively, for the upper-tread reconstruction of the NF1/NF1’and the lower-tread reconstruction of the NF1/T2. Our results together with previous slip-rate estimates for other structures show a significant internal deformation for Anatolia, especially along its subparallel strike-slip faults. These secondary faults slice Anatolia into several pieces giving rise to the formation of the Malatya-Erzincan, Cappadocian, and Central Anatolian slices, where the geometry is strongly controlled by the distribution of the Tethyan accretionary complexes.","PeriodicalId":49411,"journal":{"name":"Turkish Journal of Earth Sciences","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44067058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paleoseismology of the Ganos segment; the western extend of the North Anatolian Fault (Turkey) 加诺斯段古地震学;北安纳托利亚断层(土耳其)的西延

IF 1 4区地球科学

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI: 10.55730/1300-0985.1850

M. Aksoy, M. Meghraoui, M. Ferry, Z. Çakır, G. Uçarkuş, T. Sançar, M. Altın

引用次数: 0