Download or read book A Model of the Crust and Upper Mantle Structures in Central Anatolia Turkey Constrained by Gravity and Seismic Data written by Yagmur Yilmaz and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The complex tectonic setting of the easternmost Mediterranean Sea and central Anatolia remains largely unresolved. Previous studies, mostly based on seismic investigations, presented results that conflicted with each other. The purpose of this study is to use gravity modeling to distinguish which aspects of previously published work is consistent with Earth's gravity signal. For this purpose, I constructed gravity model profiles between longitudes 30℗ðE and 38℗ðE, each ranging from latitude 32℗ðN to latitude 40℗ðN. In these models, I incorporated structural boundaries published in previous work and compared to the satellite based EIGEN-6C4 gravity data product, what the gravity signal of the structures would be. Based on my gravity models, I identified that the crustal thickness is increasing in northern as well as in eastern direction. My gravity models show that the Cyprus slab subducts with an angle of 29 and 31 degrees along longitudes 31℗ðE and 32℗ðE, respectively. Even though the Cyprus slab is present between longitudes 33℗ðE and 34℗ðE, it has most likely experienced slab breakoff which might cause lithospheric removal farther to the north in central Anatolia. The last three profiles longitude 35℗ðE, 36℗ðE and 37℗ðE do not have the Cyprus slab.The central Anatolian lithosphere is thinner than both the African and Arabian lithosphere. The average lithospheric thickness is 75-81 km in central Anatolia and approximately 97 and 105 km in the African and Arabian plates, respectively. When the densities were compared to the African and Arabian plates, I observed relatively low-density crust and uppermost mantle in central Anatolia. The thin lithosphere and low-density material may indicate thermal alteration associated with delamination, slab breakoff and/or drip tectonics in central Anatolia.
Download or read book The Crust and Upper Mantle Structure of Eastern Anatolia Turkey from Gravity Modeling Constrained by Seismic Data written by Gokay Onal and published by . This book was released on 2016 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Anatolian region is part of a young continental collision zone between the Arabian and Eurasian plates. The lithosphere in Eastern Anatolia is underlain by a low-velocity zone associated with asthenospheric flow in the upper mantle. The asthenospheric flow might have been caused by lithospheric delamination and slab detachment. There are many debates about the thickness of the mantle lithosphere, the effect of the hot asthenospheric material on the crustal structure, and the geodynamic evolution of Eastern Anatolia. To better understand the geodynamic evolution of Eastern Anatolia, a 2.5-D gravity model of the crust and upper mantle structure between 38°E/37°N and 44°E /41°N was developed using terrestrial and satellite gravity data. The model is constrained by all available geological and geophysical data. The results of the gravity modeling reveal low-density structures within the lower crust, indicating a thermally heated crust, and a low-velocity zone in the upper mantle associated with the hot asthenospheric flow in the region. The presence of the asthenospheric flow in the upper mantle might have an effect on the crustal and lithospheric structures in the region. The lithospheric thicknesses in the Anatolian and Arabian plates are significantly different. The lithospheric thickness increases from 60 km in the northern segment of the Anatolian plate to 95 km in the Arabian Plate. Thus, the lithosphere beneath Eastern Anatolia is extremely thin. This is attributed to lithospheric delamination and slab break-off. The extremely thin lithosphere, the presence of a hot asthenosphere, the rapid uplift of topography and widespread volcanism across the region may indicate that lithospheric delamination and slab detachment occurred in Eastern Anatolia. The topography in Eastern Anatolian is not isostatically compensated. There is a residual topography of approximately 1.7 km that cannot be explained by crustal roots. Thus, part of the Eastern Anatolian Plateau may be dynamically supported by asthenospheric flow in the upper mantle.
Download or read book The Earth s Crust and Upper Mantle written by Pembroke J. Hart and published by American Geophysical Union. This book was released on 1969 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure of the Earth s Crust written by Stephan Mueller and published by Elsevier Science & Technology. This book was released on 1974 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Global Seismology written by Ibrahim Cemen and published by John Wiley & Sons. This book was released on 2017-03-03 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neotectonics involves the study of the motions and deformations of the Earth's crust that are current or recent in geologic time. The Mediterranean region is one of the most important regions for neotectonics and related natural hazards. This volume focuses on the neotectonics of the Eastern Mediterranean region, which has experienced many major extensive earthquakes, including the devastating Izmit, Turkey earthquake on August 17, 1999. The event lasted for 37 seconds, killing around 17,000 people, injuring 44,000 people, and leaving approximately half a million people homeless. Since then, several North American, European, and Turkish research groups have studied the neotectonics and earthquake potential of the region using different geological and geophysical methods, including GPS studies, geodesy, and passive source seismology. Some results from their studies were presented in major North American and European geological meetings. This volume highlights the work involving the Eastern Mediterranean region, which has one of the world's longest and best studied active strike-slip (horizontal motion) faults: the east-west trending North Anatolian fault zone, which is very similar to the San Andreas fault in California. This volume features discussions of: Widespread applications in measuring plate motion that have strong implications in predicting natural disasters like earthquakes, both on a regional and a global scale Recent motions, particularly those produced by earthquakes, that provide insights on the physics of earthquake recurrence, the growth of mountains, orogenic movements, and seismic hazards Unique methodical approaches in collecting tectonophysical data, including field, seismic, experimental, computer-based, and theoretical approaches. Active Global Seismology is a valuable resource for geoscientists, particularly in the field of tectonophysics, geophysics, geodynamics, seismology, structural geology, environmental geology, and geoengineering. Read an interview with the editors to find out more: https://eos.org/editors-vox/neotectonics-and-earthquake-forecasting
Download or read book Synthesis of Regional Crust and Upper mantle Structure from Seismic and Gravity Data written by Shelton S. Alexander and published by . This book was released on 1982 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure of the Earth s Crust and Upper Mantle from the Data of Seismic Investigations written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure of the Earth s Crust and Upper Mantle Plotted from the Data of Seismic Studies written by and published by . This book was released on 1978 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crustal and Upper Mantle Structure of Ridge transform Intersections at Ultra slow Spreading Rates written by Dana E. Vitek and published by . This book was released on 1999 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The North Anatolian Fault Turkey written by Elvira Papaleo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The TRANSMED Atlas The Mediterranean Region from Crust to Mantle written by William Cavazza and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: A publication of the Mediterranean Consortium for the 32nd International Geological Congress
Download or read book Crustal Structure from In Country and Ground Truth Data written by and published by . This book was released on 2009 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are investigating the crustal and upper mantle structure of the region in central Asia bounded approximately by longitude 41-67 deg E and latitude 20-44 deg N by using in-country datasets of seismic phase arrival times, supplemented by ground truth datasets developed from our previous research efforts. We present the results of Pn tomography using a dataset consisting entirely of GT5 events in the region. From 27 calibrated earthquake clusters we extract 832 events that qualify as ground truth (GT)5 at the 90% confidence level. The raypaths of Pn readings from these events provide good coverage of most of the region except for the Makran region in the southeast. To determine an appropriate reference model for the region we compared empirical travel times calculated from the GT5 dataset to those predicted by several models: the ak135 global model (Kennett et al., 1995), the CUB2.0 model (Ritzwoller et al., 2003), and the so-called "Unified" model a 3-D velocity model of the crust and upper mantle in Eurasia, constructed from models developed by researchers at Lawrence Livermore National Laboratory (LLNL) and Los Alamos National Laboratory (LANL) (Pasyanos et al, 2004; Begnaud et al., 2004; Steck et al., 2004; Flanagan et al., 2007). Although the CUB2.0 and Unified models do vary laterally, in the study region they vary quite slowly and capture little of the variability of observed travel times. All three models predict Pn travel times that are systematically too fast. These baseline errors range from 2-4 seconds. For this initial round of tomography we stretched the ak135 model to a crustal thickness of 45 km for the reference model.
Download or read book The Upper Mantle written by Anne Reinier Ritsema and published by . This book was released on 1972 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatise on Geophysics written by and published by Elsevier. This book was released on 2015-04-17 with total page 5604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Treatise on Geophysics, Second Edition, is a comprehensive and in-depth study of the physics of the Earth beyond what any geophysics text has provided previously. Thoroughly revised and updated, it provides fundamental and state-of-the-art discussion of all aspects of geophysics. A highlight of the second edition is a new volume on Near Surface Geophysics that discusses the role of geophysics in the exploitation and conservation of natural resources and the assessment of degradation of natural systems by pollution. Additional features include new material in the Planets and Moon, Mantle Dynamics, Core Dynamics, Crustal and Lithosphere Dynamics, Evolution of the Earth, and Geodesy volumes. New material is also presented on the uses of Earth gravity measurements. This title is essential for professionals, researchers, professors, and advanced undergraduate and graduate students in the fields of Geophysics and Earth system science. Comprehensive and detailed coverage of all aspects of geophysics Fundamental and state-of-the-art discussions of all research topics Integration of topics into a coherent whole
Download or read book General Features of the Upper Mantle Structure from Seismic Data written by Nina I. Pavlenkova and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2005 Joint Assembly written by American Geophysical Union. Joint Assembly and published by . This book was released on 2005 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Earth s Crust and Upper Mantle written by Pembroke J. Hart and published by . This book was released on 1971 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt:
