Home›Active tectonic and paleoseismologic characteristics of the Yenice-Gönen fault, NW Turkey, in light of the 18 March 1953 Yenice-Gönen Earthquake (Ms=7.2)
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Active tectonic and paleoseismologic characteristics of the Yenice-Gönen fault, NW Turkey, in light of the 18 March 1953 Yenice-Gönen Earthquake (Ms=7.2)
BULLETIN OF THE MINERAL RESEARCH AND EXPLORATION (MTA Dergisi)
Article Details
Active tectonic and paleoseismologic characteristics of the Yenice-Gönen fault, NW Turkey, in light of the 18 March 1953 Yenice-Gönen Earthquake (Ms=7.2)
The Yenice-Gönen Fault (YGF) is located in the central part of the Biga Peninsula between Gönen and Yenice and is a right-lateral strike-slip active fault with general trending N65°E. On 18 March 1953 there was an earthquake on the YGF that died 263 people (Ms=7.2) and a 70 km surface rupture developed during this earthquake. In this study measurements of slip distribution were performed on the surface rupture of the Yenice-Gönen Earthquake (YGE) and the annual slip rate on the YGF was calculated. Right-lateral displacements of between 1.70±0.1 and 3.20±0.2 metres were measured on the surface rupture of the YGE. The maximum displacements were in an area close to the central part of the YGF (between Çakır and Karaköy village) and these values decreased relatively in NE and SW directions, documenting that was the bilaterally surface rupture propogation during the YGE. In the last 300.000 years, a total offset of 800±50 metres was measured on Gönen River and annual slip rate of 2.65±0.15 mm was calculated along the YGF. Current GPS studies show right-lateral strike-slip faults in the South Marmara region have slip rates of 6-8 mm/year. This slip rate is assessed as being partitioned between the YGF, Sarıköy Fault and Çan-Biga Fault zones which represent extensions of the North Anatolian Fault system within the South Marmara region. Paleoseismology studies determined that in the last 6200 years 6 earthquakes resulting in surface ruptures have occurred on the YGF, including the 1953 earthquake. According to the 14C and OSL dating results, the variable and irregular earthquake recurrence interval of YGF is ranging from 505 to 1793 years. In this study average earthquake recurrence interval of YGF was determined as 1180 years.
Structural Geology, Active tectonics · Volume 172 / December 2023 · Pages: 119-140
Ali KOÇYİĞİT
Indexed In · Volume 172 / December 2023
Neotectonics of the Sarıköy-İnova and Çan-Bayramiç-Ezine fault zones: basin formation, age and slip rates, NW Anatolia-Türkiye
Authors:
Ali KOÇYİĞİT
ABSTRACT
The Sarıköy-İnova and the Çan-Bayramiç-Ezine fault zones (SIFZ, ÇBEFZ) comprise the southern strand of the North Anatolian Fault System in the Biga Peninsula. They are located in the area between Sarıköy to northeast and the Dalyan settlement around Bozcaada in the North Aegean Sea to southwest. Both of the fault zones are active. This is evidenced by the 6 March 1737 (Ms =7.0) İnova, 1st February 1809 Hurma (Ms = 6.1), and the 8 February 1826 Güllüce (Ms = 6.2) historical earthquakes resulted from these fault zones. Maximum lengths of fault segments comprising the SIFZ and the ÇBEFZ are 14 km and 15 km, respectively. Based on the maximum lengths of fault segments, the magnitude of the peak earthquakes to be originated from these faults are Mw = 6.3 and 6.6, respectively. Based on both the geological and geographic markers, the total right lateral offsets accumulated on the SIFZ and ÇBEFZ are 12 km and 20 km, respectively. These offset values imply to the slip rates of 4.6 mm/yr and 7.7 mm/yr, respectively. Five pull-apart basins were developed on both fault zones. These are the Sarıköy, İnova, Kazabat, Çan and Ezine-Bayramiç basins. The first three of them are pure strike-slip pull-apart basins, while the type of the rest basins is superimposed. The angular unconformity between the nondeformed basin fill of Quaternary age and the folded to thrust-faulted basement rocks of pre-Quaternary age reveals strongly that the pull-apart basins have formed during the Quaternary time. This relationship also reveals that the commencement age of the strike-slip neotectonic regime and formation of associated fault zones are the Early Quaternary. This work was dedicated to the retirement memory of Dr. Fuat Şaroğlu.
Şule GÜRBOĞA, Aslı Zeynep YAVUZOĞLU, Recep GÜNEY, Fatma BETÜL KARCI, Ayhan YAVUZOĞLU, Özgür TÜRKMEN, Pir Çağatay KARTAL, Bahri Serkan AYDEMİR, Murat EVREN, Murat CENK, Barbaros ŞİMŞEK, Eyyüp ÖZBEK, Tuğrul Şükrü YURTSEVER, Füsun YİĞİT FETHİ, Eşref AYLAN, Uğur Zeki KIRAT
Indexed In · Volume 163 / 2020
Tectonic meaning of the deformation in shallow marine region between Gaziköy-Mürefte (Sea of Marmara) by using seismic reflection data, NW Anatolia
Authors:
Şule GÜRBOĞA, Aslı Zeynep YAVUZOĞLU, Recep GÜNEY, Fatma BETÜL KARCI, Ayhan YAVUZOĞLU, Özgür TÜRKMEN, Pir Çağatay KARTAL, Bahri Serkan AYDEMİR, Murat EVREN, Murat CENK, Barbaros ŞİMŞEK, Eyyüp ÖZBEK, Tuğrul Şükrü YURTSEVER, Füsun YİĞİT FETHİ, Eşref AYLAN, Uğur Zeki KIRAT
ABSTRACT
Within the scope of this paper, seismic reflection and bathymetry studies were carried out in the shallow marine area forming the westernmost part of the Tekirdağ Basin using the R/V Selen Research Vessel within the MTA Marine Research Department. In the study area, ~ 500 km length bathymetry data and ~191 km shallow seismic profiles ( 41 lines) were collected. By means of the data, tectonic structures and deformation textures of the North Anatolian Fault System (NAFS) in the marine area of Gaziköy were examined. As a result of the processing and interpretation of the seismic sections, compression structures occurring due to the SW rotation of the NAFS in the study area, the morphology of the Ganos depression that formed as a result of faulting and also three different stratigraphic units were distinguished. These units are separated from each other by distinct unconformity surfaces and each unit presents different deformation structures. One of the most significant results obtained from the seismic data is that the unconformity surface that separates the current sediments of the seafloor from the older units is represented by the overlapping structures indicate sea level changes. It has been assessed that this situation occurred as a result of the erosional process developed during sea level fall.
https://doi.org/10.19111/bulletinofmre.784476
Keywords:
Gaziköy-Mürefte, Shallow marine deformation, Unconformity surface, North Anatolian Fault System, Sea of Marmara.
Descriptions, systematics and revisions of the subgenera Alveolina (Glomalveolina) Hottinger, 1960 and Alveolina (Alveolina) d’Orbigny, 1826 (Foraminiferida)
Authors:
Şükrü ACAR
ABSTRACT
In this study, the genus Alveolina D’ Orbigny, 1826 and its Alveolina (Alveolina) D’ Orbigny, 1826 and Alveolina (Glomalveolina) Hottinger, 1960 subgenera were re-examined and identified. Systematics of the subgenera Alveolina (Alveolina)=Alv. (Alv.) and Alveolina (Glomalveolina)=Alv.(Glomalv.) have also been reviewed and revised. Alv. (Glomalv.) is considered as a subgenus, not a genus (?). Because, all the generic features of microspheric generations (fB) of these two subgenera are identical. Thus, Alveolina D’ Orbigny, 1826 and Glomalveolina Hottinger, 1960 cannot be used as if they were two different genera (?). Otherwise Glomalveolina would be the synonym of Alveolina in “Systematic Paleontology” chapter. Therefore, Alv. (Alv.) and Alv. (Glomalv.) are both subgenusses, and the structural difference between these subgenera is observed seen in their megalospheric generations (fA). Besides, description of the genus (?) Glomalveolina has never been made in any of the studies in which Glomalveolina is referred as genus (?). However, the subgenus Alv. (Glomalv.) has incorrectly been used by many authors as “genus (?) Glomalveolina Hottinger, 1960 or 1962”.
https://doi.org/10.19111/bulletinofmre.501688
Multivariate analysis of log-ratio transformed data and its priority in mining science: Porphyry and polymetallic vein deposits case studies
Authors:
Farshad DARABI-GOLESTAN, Ardeshir HEZARKHANI
ABSTRACT
Each mineralization style is characterized by typical signature associations between elements due to elemental interactions, therefore the coherence and closure effects problem must be overcome in geochemical processing. The coherence indicates the ratios between two components (rows or columns) remains the same whether they are considered in a subcomposition or in the full composition. The log-ratio transformation (LRT) has recognized as a standard procedure to support subcompositional coherence. The log-transformed data is applicable for geochemical data to unveil such associations, prior to applying the multivariate analysis like correspondence analysis (CA) and principal component analysis (PCA). At the present study, subcompositional coherence is overcome by inverse iso-metric log-ratio transformation for geochemical compositional data at two polymetallic and porphyry deposits. Based on Ilr-transformed data, Ag, Au, As, Pb, Te, Mo and rather S, W, Cu are enriched as polymetallic elements at Glojeh, while Au-Cu-(Mo) compositions indicate a porphyry deposit occurred in Dalli deposit. The ability to handle zero values in the data matrix and determining an elemental eccentricity from the center of each axis based on Euclidean distances are the advantages of CA method, with compression to LRT. Whereas, loading factors which spread in every direction and providing subcompositional coherence are the competitive advantages of PCA based on LRT, for both case studies. Results with these techniques show significant ability to draw an inference in such geochemical data, and in improving the performance of multivariate techniques using LRT.
https://doi.org/10.19111/bulletinofmre.456958
Keywords:
Isometric log-ratio transformation, Subcompositional coherence, Correspondence analysis, Principal component analysis, Geochemical compositional data, Polymetallic and porphyry deposits.
Relationship between petroleum and iodine in Southeastern Anatolia Basin
Authors:
Adil ÖZDEMİR
ABSTRACT
This study was made for investigating the relationship between iodine and hydrocarbon accumulations and to determine iodine contents of formation waters in the Southeastern Anatolia basin oilfields where have been produced almost all of the Turkey oils (more than 95%). Formation water samples have taken from 234 production wells in 49 oilfields which have different geological structures where oil and gas production has performed by the Turkish Petroleum Company (TPAO). Also, the drilling mud samples from EBY-17 oilwell in Elbeyli (Adıyaman) field has collected, and their iodine analyses were carried out. Although the fields in the Southeastern Anatolia basin are old and some fields the secondary production methods are used, the high relationship between the oil and gas deposits and iodine were proved. As well as in other oil and gas fields in the world, not all reservoir waters in the Southeastern Anatolia basin are saline. However, all of them are rich in iodine. Therefore, the iodine-rich waters are a direct indicator for oil and gas producible reservoirs (containing mature hydrocarbon). Reservoir-targeted iodine geology and hydrogeology methods have simple sampling process, and laboratory analyses can result at a short time. The results are low cost, reliable and consistent. In the case when these data are utilized with other geological and geophysical methods, it is determined will be a practical and useful tool to reduce the hydrocarbon exploration risk to a minimum and to discover new deposits suitable for commercial production.
https://doi.org/10.19111/bulletinofmre.501519
Keywords:
Southeastern Anatolia basin, Iodine, Petroleum hydrogeology, Oil and gas exploration, Oilfi eld waters, Formation waters.
