Results 61 to 70 of about 193,193 (217)

Kamafugite Magma Pathways and Lava‐Flow Paleotopography From Three‐Dimensional Audiomagnetotelluric Imaging Constrained by Borehole Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract An audiomagnetotelluric (AMT) survey was conducted within the Alto Paranaíba Igneous Province, southeastern Brazil, to delineate shallow occurrences of kamafugite, a rare ultrapotassic volcanic rock worldwide. A dense grid of AMT stations was deployed, allowing the construction of a high‐resolution 3D electrical resistivity model ...
Lucca M. Franco, Emanuele F. La Terra, Liliane P. Panetto, Adevilson O. Alves, Miguel A. Tupinambá, Sergio L. Fontes, Emin U. Ulugergerli   +6 more
wiley   +1 more source

Aeromagnetic Anomalies over the Area of Unzendake Volcano.

Journal of geomagnetism and geoelectricity, 1994
An aeromagnetic survey flight over the area of Unzendake volcano was conducted in August, 1991, after the commencement of this time eruption, and a geomagnetic anomaly map was derived from collected data. The comparison of magnetic anomalies with the ones in 1981 by the New Energy Development Organization was attempted in order to judge whether there ...
openaire   +2 more sources

Magnetic anomalies in and around Japan based on aeromagnetic surveys.

Journal of geomagnetism and geoelectricity, 1984
A magnetic anomaly map was complied based on the results of aeromagnetic surveys made in and around Japan, which have been in progress since 1967 under the auspices of the Geographical Survey Institute. Magnetic lineations were found in the following zones (in many cases in good correlation to the Bouguer anomaly and/or the main tectonic zones of Japan)
TANAKA, Minoru, HIROISHI, Kazuo, MATSUMURA, Shoichi   +2 more
openaire   +2 more sources

Along‐Strike Variations in Sub‐Arc Melting Beneath the Alaska Peninsula Revealed by P‐Wave Attenuation

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract The diverse volcanic activity in the Alaska Peninsula section of the Alaska‐Aleutian subduction zone is presumably caused by substantial variations in mantle wedge melting or trans‐crustal processes beneath the arc. In this study, we investigate sub‐arc melting beneath the Alaska Peninsula by measuring P‐wave attenuation, as attenuation is ...
Zhuoran Zhang, S. Shawn Wei, Yurong Riley Zhang, Fan Wang, Dongdong Tian   +4 more
wiley   +1 more source

The Geologic History of the Chehalis Forearc Basin, Washington State, USA

Tectonics, Volume 45, Issue 7, July 2026.
Abstract The Chehalis basin is located between the Cascade arc and the Coast Range in southwest Washington State. It consists of sedimentary and volcanic rocks deposited throughout the Cenozoic and is underlain by the Siletzia terrane, a thick, large igneous province accreted in the Eocene.
R. L. Moe, J. Bershaw, L. M. Staisch, A. R. Streig   +3 more
wiley   +1 more source

Modal decomposition of magnetic maps: the case of Cape Roberts aeromagnetic survey, Antarctica

Annals of Geophysics, 2009
This paper proposes a digital enhancement tool for magnetic anomaly maps. The magnetic anomaly map is decomposed<br />by means of Eigenvalue Decomposition into a number of orthogonal bases.
Marco Gambetta
doaj   +1 more source

Araguainha Dome, Brazil: A polygonal impact structure due to a complex pre‐impact regional structural framework

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1355-1385, July 2026.
Abstract We investigated the structural framework of the north–northwestern Paraná Basin in Brazil to test whether the pre‐impact structures in this region may have had any influence on the first‐order formation and morphostructure of the Araguainha impact structure (AIS).
Renato B. Bernardes, Wolf U. Reimold, Roger L. Gibson, Julia B. Curto Ma, Adolfo B. Silva, Natalia Hauser   +5 more
wiley   +1 more source

The Matusevich aeromagnetic anomaly over Oates Land, East Antarctica

, 2003
The "Matusevich Anomaly" is a high-amplitude and linear aeromagnetic feature imaged over Oates Land, East Antarctica. Interpretation of this anomaly provides new geophysical insight into the Wilson Terrane.
DAMASKE, D., FERRACCIOLI, F., TALARICO, F. M., BOZZO, E.   +3 more
core   +1 more source

Integrated Geophysical Imaging Reveals the Origin and Pathways of Mantle‐Derived CO2 Beneath the Tangra Yumco Rift, Central Tibet

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The Tangra Yumco Rift (TYR) in central Tibet is a key window for crust–mantle interactions during extension. We performed high‐resolution crust‐mantle imaging using receiver function analysis, 1‐D nonlinear S‐wave velocity inversion, and tomoDD tomography, revealing a vertical Crust–Mantle Degassing System (CMDS) bounded by the Zhala (ZF) and ...
Zongxu Li, Rizheng He, Hanhan Tang, Qiang Xu, Lei Gao, Yulan Li, Lihui Tan, Xiao Niu, Ruo Jia   +8 more
wiley   +1 more source

High-resolution aeromagnetic survey of Calabria (Southern Italy)

Journal of Maps, 2017
We present a 1:350,000 high-resolution magnetic anomaly map of Calabria (Southern Italy), obtained by merging the results from two low-altitude aeromagnetic surveys performed in southern and northern Calabria.
Antonio Vecchio, Liliana Minelli, Francesca D’Ajello Caracciolo, Iacopo Nicolosi, Carla Bottari, Roberto Carluccio, Rossella Celi, Stefano Chiappini, Alessandra Giuntini, Valerio Materni, Alfio Messina, Tania Mochales, Adriano Nardi, Fabio Speranza, Massimo Chiappini   +14 more
doaj   +1 more source