Article
Geochemistry & Geophysics
Billel Melouk, Abdelkrim Yelles-Chaouche, Fethi Semmane, Juan Jose Galiana-Merino
Summary: This study investigates the Moho depth and velocity structure of the crust and upper mantle beneath seismic stations in Algeria. An inversion technique using teleseismic P-wave receiver functions and Rayleigh wave dispersion curves is applied. The results show variations in Moho depth and reveal a two-layer crust in the study area. The study sheds new light on the crustal structure and Moho depth in northern Algeria. Overall, the study is rated 8 out of 10 in terms of importance.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Astronomy & Astrophysics
Rakshit Joshi, Brigitte Knapmeyer-Endrun, Klaus Mosegaard, Heiner Igel, Ulrich R. Christensen
Summary: Estimation of crustal structure and thickness is crucial for understanding planetary formation and evolution, particularly for planets like Mars with low seismic activity due to lack of plate tectonics. The proposed method of joint inversion of receiver functions and apparent incidence angles, along with information-theoretic statistical tests for model selection, can enhance accuracy in data analysis.
EARTH AND SPACE SCIENCE
(2021)
Article
Geochemistry & Geophysics
Xu Wang, Ling Chen, Morteza Talebian, Yinshuang Ai, Mingming Jiang, Huajian Yao, Yumei He, Abdolreza Ghods, Farhad Sobouti, Bo Wan, Yang Chu, Guangbing Hou, Qi-Fu Chen, Sun-Lin Chung, Wenjiao Xiao, Fu-Yuan Wu, Rixiang Zhu
Summary: The study successfully imaged the shallow crustal S-wave velocity structure in the Iranian Plateau using a joint inversion method. The results revealed high- and low-velocity anomalies, which are likely associated with magmatic activity and marl/shale layers, respectively. These findings provide important insights into sedimentary deformation in the Zagros fold-and-thrust belt and the variations in compositions and forming-environments of magmatic rocks in the Iranian hinterland.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Manuel J. Aguilar-Velazquez, Xyoli Perez-Campos, Olivia Pita-Sllim
Summary: Over the years, seismologists have recognized the complex crustal structure beneath Mexico City, which can affect the behavior of seismic waves. This study presents a high-resolution S-wave velocity model obtained by combining radial receiver functions and group-velocity dispersion curves. The obtained model includes azimuthal variations that indicate crustal discontinuities. Through geostatistical analysis, the horizontal spatial correlation of the crustal structure was determined, and two innovative techniques were introduced for estimating S-wave velocities and improving the accuracy of the model.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Qiuyue Yang, Kelly H. Liu, Tuo Wang, Jianguo Song, Stephen S. Gao
Summary: A three-dimensional shear wave velocity model for the southeastern United States was constructed by jointly inverting receiver functions and Rayleigh wave phase velocity dispersion data. The resulting model shows clear spatial correspondence with major surficial geological features.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Mehdi Tork Qashqai, Erdinc Saygin
Summary: The study developed a joint inversion approach using teleseismic P-wave coda autocorrelations to simultaneously constrain the crustal Vp, Vs, and Vp/Vs ratio, showing significant improvement in parameter estimation compared to traditional methods. The velocity models inferred from the approach along a seismic profile in central Australia revealed distinct patterns of Moho and Vp/Vs variations, corresponding well with previous studies and reflecting interactions between crustal domains.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Qiang Xu, Junmeng Zhao, Xiaohui Yuan, Hongbing Liu, Changhui Ju, Bernd Schurr, Wasja Bloch
Summary: This study presents new insights into the crustal structure of the east Pamir and its surrounding regions, including variations in crustal thickness, Moho structure, and crustal interaction patterns.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Shitan Nie, Xiaobo Tian, Xiaofeng Liang, Bo Wan
Summary: This study conducted joint inversion of seismic measurements in the central Tibetan Plateau and found a low-velocity layer in the middle-lower crust, indicating the presence of ductile deformation but not crustal channel-flow. The results suggest that there is not enough melt volume in central Tibet to support crustal channel-flow and the formation of extensional structures may be attributed to ductile deformation in the middle-lower crust.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Christian Schiffer, Stephane Rondenay, Lars Ottemoller, Anne Drottning
Summary: The crustal structure of the Nordland and Troms region in Norway has attracted scientific attention due to its seismic activity and conflicting interpretations. The Lofoten-Vesteralen archipelago, which shows variations in crustal thickness, is a key part of the puzzle. This study uses new lithospheric models to address the debate and finds consistency with previous models, suggesting that the crustal structure may not be as controversial as previously thought. The findings highlight the importance of conceptualizing the Moho as a transition zone with thickness and structural variations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Review
Astronomy & Astrophysics
Di-Cheng Zhu, Qing Wang, Roberto F. Weinberg, Peter A. Cawood, Zhidan Zhao, Zeng-Qian Hou, Xuan-Xue Mo
Summary: The continental crust in the southern Tibet region of the India-Asia collision zone is characterized by an overthickened layer of felsic composition with an underlying granulite-eclogite layer. Extensive data suggests that this crust experienced magmatism from 245 to 10 million years ago, with flare-ups at 185-90 and 55 million years ago caused by a combination of external and internal factors. The growth of this crust is attributed to a process of fractional crystallization, subduction-induced melting, and collision-induced melting, resulting in vertical stratification and density sorting of the Gangdese crust.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
(2023)
Article
Geochemistry & Geophysics
Yuchen Liu, Lupei Zhu
Summary: Interfaces are significant in Earth's layering structure and a new model parametrization with iterative linearized inversion method has been developed to determine 1-D crustal velocity structure efficiently. The method applied to dense linear array across the Wabash Valley Seismic Zone produced high-resolution crustal image, revealing crustal features and potential geological processes in the area.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Hadi Shafaii Moghadam, Qiu-Li Li, William L. Griffin, Robert J. Stern, Jose F. Santos, Mihai N. Ducea, Chris J. Ottley, Orhan Karsli, Fatemeh Sepidbar, Suzanne Y. O'Reilly
Summary: Continental-arc igneous rock compositions change in response to the transition from subduction to collision, providing insights into the evolution of crust, lithosphere, and magma sources. The Urumieh-Dokhtar Magmatic Belt (UDMB) in Iran offers a natural laboratory to study these changes. Geochemical and geochronological data reveal different stages of magmatic activity, reflecting the processes of subduction, collision, and crustal thickening. The temporal changes in UDMB magmas are related to the response of the overriding plate to changes in the subduction geometry and collision events.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Jie Fan, Xuewei Bao, Bingfeng Zhang
Summary: We constructed a new 3-D shear wave velocity model of the crust and upper mantle beneath SE China and determined crustal thicknesses and Vp/Vs ratios. We found high-velocity anomalies and high Vp/Vs ratios beneath the coastal volcanic-intrusive belt (CVIB), indicating underplating of mafic material. We observed stronger asthenospheric upwelling and partial melting beneath the CVIB, suggesting an increase in intensity of geodynamic processes responsible for the Mesozoic magmatism in SE China.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Energy & Fuels
Hajar Miri, Banafsheh Habibian Dehkordi, Gholamreza Payrovian
Summary: This study focuses on the geological characteristics of the Sarab structure in southwestern Iran and its major exploration target, the Asmari Formation, using the magnetotelluric method for detection and analysis. The results indicate that the electrical contrasts of sedimentary rock layers have a significant impact on exploration, and highlight the resistive structure characteristics of the Sarab Anticline in the region.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Rakshit Joshi, Brigitte Knapmeyer-Endrun, Klaus Mosegaard, M. A. Wieczorek, Heiner Igel, Ulrich R. Christensen, Philippe Lognonne
Summary: Recent estimates of Mars' crustal thickness suggest that it can either be around 20 km or around 40 km beneath the InSight lander. To gain a better understanding of the subsurface structure, scientists propose using random matrix theory applied to receiver functions. By analyzing waveforms and using a spiked covariance model, they can detect coherent arrivals and identify previously undetected converted arrivals. This information is then used to determine the crustal thickness and depth of mid-crustal interfaces.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
K. Motaghi, M. Tatar, K. Priestley, F. Romanelli, C. Doglioni, G. F. Panza
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Astronomy & Astrophysics
J. R. Elliott, E. A. Bergman, A. C. Copley, A. R. Ghods, E. K. Nissen, B. Oveisi, M. Tatar, R. J. Walters, F. Yamini-Fard
EARTH AND SPACE SCIENCE
(2015)
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Geochemistry & Geophysics
M. Ebrahimi, M. Tatar, A. Aoudia, M. Guidarelli
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(2018)
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Geochemistry & Geophysics
K. Motaghi, E. Shabanian, M. Tatar, M. Cuffaro, C. Doglioni
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Geochemistry & Geophysics
Keith Priestley, Dan McKenzie, Jamie Barron, Mohammad Tatar, Eric Debayle
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2012)
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Geochemistry & Geophysics
R. Rouhollahi, M. R. Ghayamghamian, F. Yaminifard, P. Suhadolc, M. Tatar
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(2012)
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Geochemistry & Geophysics
H. Kianimehr, E. Kissling, F. Yaminifard, M. Tatar
JOURNAL OF SEISMOLOGY
(2018)
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Geochemistry & Geophysics
K. Motaghi, M. Tatar, Z. H. Shomali, A. Kaviani, K. Priestley
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2012)
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Geochemistry & Geophysics
S. M. Momeni, M. Tatar
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2018)
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Geochemistry & Geophysics
Mohammad Tatar, Denis Hatzfeld, Amin Abbassi, Farzam Yamini Fard
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Geochemistry & Geophysics
Edwin Nissen, James Jackson, Salman Jahani, Mohammad Tatar
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2014)
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Geochemistry & Geophysics
Meysam Mahmoodabadi, Farzam Yaminifard, Mohammad Tatar, Ayoub Kaviani, Khalil Motaghi
GEOPHYSICAL JOURNAL INTERNATIONAL
(2019)
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Geochemistry & Geophysics
S. SoltaniMoghadam, M. Tatar, A. Komeazi
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2019)
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Geochemistry & Geophysics
Majid Nemati, Mohammad Tatar
ANNALS OF GEOPHYSICS
(2015)