Article
Geochemistry & Geophysics
Gan Lu, Wu QingJu, Huang QingHua, Zhang HuiQian, Tang RongJiang
Summary: This study proposes a method of joint inversion using the quasi Newton method to obtain resistivity and velocity models with similarity constraint. By defining a new joint constraint operator, the models can evolve towards coupled and similar structure while maintaining the essential features. The joint inversion improves the coupling degree between resistivity and velocity models and enhances the resolution of magnetotelluric.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2022)
Review
Geochemistry & Geophysics
Zhinong Wang, Chengyu Sun, Dunshi Wu
Summary: In this paper, a near-surface site characterization method based on the joint iterative analysis of first-arrival and surface-wave data (JIAFS) is proposed. The method combines the advantages of first-arrival traveltime tomography (FATT) and multichannel analysis of surface waves (MASW) to establish accurate near-surface velocity and Poisson's ratio models under complex geological conditions.
SURVEYS IN GEOPHYSICS
(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
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
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
Zheng Tang, Jordi Julia, P. Martin Mai, Walter D. Mooney, Yanqiang Wu
Summary: A high-resolution 3D crustal and upper-mantle shear-wave velocity model of Northeast China is established through joint inversion of receiver functions and fundamental-mode Rayleigh wave phase velocities, providing insights into the internal structure of the Earth.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Pingping Wu, Handong Tan, Zhifeng Ding, Wenxin Kong, Miao Peng, Xingchen Wang, Lehong Xu
Summary: The integrating technique of multigeophysical data sets has been utilized to improve the imaging resolution of the subsurface structure. Through joint inversion of Magnetotelluric (MT) and dispersion data, significant improvements in resolution and accuracy have been achieved. This method has been validated through synthetic and field data tests.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Chen Liao, Xiangyun Hu, Shihui Zhang, Xuewen Li, Quanzeng Yin, Zhao Zhang, Longfei Zhang
Summary: Joint inversion is an effective technique for obtaining high-resolution solutions in geophysics. In this study, a new inversion strategy based on the alternating direction method of multipliers was proposed for convenient and efficient joint inversion. Three optimization algorithms were presented for different types of geophysical data, resulting in more accurate results compared to separate inversions. The algorithms were successfully applied to field data, verifying the practicality of the inversion strategy.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Guo Yu, Tao Lei, Wei Zhang, Xiaofei Chen, Zhanxiang He
Summary: We propose an alternating joint two-dimensional inversion algorithm for imaging integrated magnetotelluric (MT) and ambient noise dispersion data sets. The algorithm is tested on classic synthetic models and a more realistic example with partial inconsistent boundaries, demonstrating higher resolution and correct imaging of resistivity and velocity models. The results suggest that the resistivity model obtained from joint inversion is superior, while the velocity model should be evaluated comprehensively.
JOURNAL OF APPLIED GEOPHYSICS
(2023)
Article
Geochemistry & Geophysics
Chengping Chai, Charles J. Ammon, Monica Maceira, Robert Herrmann
Summary: This study investigates the subsurface structure of the Eastern United States (EUS) and finds thinner crust and slower upper mantle in certain regions. The relationship between subsurface structure and seismicity is explored, showing a weak correlation between upper mantle shear velocity and earthquake focal mechanism. The study provides valuable insights into the geological characteristics of the EUS.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
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
Geochemistry & Geophysics
Rui Guo, He Ming Yao, Maokun Li, Michael Kwok Po Ng, Lijun Jiang, Aria Abubakar
Summary: This study applies deep learning to assist joint inversion for audio-magnetotelluric and seismic travel time data, using deep residual convolutional neural networks to learn resistivity-velocity relationships efficiently. The method shows faster convergence and lower data misfits, maintaining consistent relationships between inverted resistivity and velocity.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Gao TianYang, Ding ZhiFeng, Wang XingChen, Jiang Lei
Summary: The study in the Southeast Tibetan Plateau revealed the impact of low-velocity zones and channels in the mid-lower crust on seismic activity, indicating that rigid block compression and material flow within the channels also play a significant role in crustal deformation.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2021)
Article
Geochemistry & Geophysics
Gen Li, Tonglin Li, Rongzhe Zhang
Summary: MT method is an important geophysical exploration method to study the electrical structure of the Earth for exploring mineral resources. This study proposed a multiparameter MT joint inversion algorithm considering the IP effect, which can obtain additional information that traditional MT method cannot achieve.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
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
Geochemistry & Geophysics
Max Moorkamp, Stewart Fishwick, Richard J. Walker, Alan G. Jones
EARTH AND PLANETARY SCIENCE LETTERS
(2019)
Article
Energy & Fuels
R. Delhaye, V. Rath, A. G. Jones, M. R. Muller, D. Reay
Article
Geochemistry & Geophysics
R. L. Evans, J. Elsenbeck, J. Zhu, M. G. Abdelsalam, E. Sarafian, D. Mutamina, F. Chilongola, E. A. Atekwana, A. G. Jones
Article
Geochemistry & Geophysics
Banafsheh Habibian Dehkordi, Ian J. Ferguson, Alan G. Jones, Juanjo Ledo, Grant Wennberg
Article
Geochemistry & Geophysics
Miao Peng, Handong Tan, Max Moorkamp
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Geochemistry & Geophysics
Jan Vozar, Alan G. Jones, Joan Campanya, Chris Yeomans, Mark R. Muller, Riccardo Pasquali
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geochemistry & Geophysics
Michele Paulatto, Max Moorkamp, Stefanie Hautmann, Emilie Hooft, Joanna Morgan, R. Stephen J. Sparks
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Geochemistry & Geophysics
Max Moorkamp, Anna Avdeeva
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geochemistry & Geophysics
M. Moorkamp, A. Avdeeva, Ahmet T. Basokur, Erhan Erdogan
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geochemistry & Geophysics
Hao Dong, Wenbo Wei, Sheng Jin, Gaofeng Ye, Alan G. Jones, Letian Zhang, Jian'en Jing, Chengliang Xie, Yaotian Yin
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2020)
Article
Geosciences, Multidisciplinary
F. Le Pape, A. G. Jones, M. W. Jessell, C. Hogg, L. Siebenaller, S. Perrouty, A. Toure, P. Ouiya, G. Boren
Summary: This study investigates the lithospheric structure of the West-African craton through analyzing and modeling magnetotelluric data, providing insights into the thermal signature and composition of the subcontinental lithosphere. The inferred deep structure suggests a present-day thermal lithosphere-asthenosphere boundary depth of at least 250 km below the Baoule-Mossi domain, with the lithosphere transitioning from cold and thick to thinner and more fertile below the Volta Basin. The amount of water in the lithosphere may be explained by Paleoproterozoic subduction processes, but later lithospheric enrichment cannot be ruled out.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Sarah Blake, Tiernan Henry, John Paul Moore, John Murray, Joan Campanya, Mark R. Muller, Alan G. Jones, Volker Rath, John Walsh
Summary: This study reveals a hydrogeological conceptual model of a low-enthalpy thermal spring in a fractured limestone setting in Ireland, investigating its source, circulation pathways, and temporal variation. Through a multidisciplinary approach, it is found that the thermal waters in the area continuously flow and reach their highest temperature and discharge during the winter, due to a structurally controlled hydrothermal circulation system influenced by climate change.
HYDROGEOLOGY JOURNAL
(2021)
Article
Geochemistry & Geophysics
M. C. Manassero, J. C. Afonso, F. Zyserman, A. G. Jones, S. Zlotnik, I Fomin
Summary: The article introduces a novel joint probabilistic inversion scheme for large-scale lithospheric studies, combining 3D magnetotelluric and surface-wave dispersion data. The approach utilizes advanced strategies for fast solutions and algorithms to achieve efficient simulations, demonstrating feasibility, benefits, and performance for imaging the temperature and conductivity structures of the lithosphere.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Max Moorkamp, Sinan Ozaydin, Kate Selway, Alan G. Jones
Summary: The Southern African Magnetotelluric Experiment (SAMTEX) collected data at over 700 sites in southern Africa and presented the first 3D inversions of the full dataset. The study focused on comparing different inversion codes and subsets of data to assess the robustness of the 3D models. Results showed that all inversions imaged the main conductive and resistive features, but differences existed between the models.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)