Results 61 to 70 of about 4,249,154 (233)

Surface and subsurface structures of Kalabsha area, southern Egypt, from remote sensing, aeromagnetic and gravity data

Egyptian Journal of Remote Sensing and Space Sciences, 2010
Kalabsha area is known to be the most seismo-active zone at the southwestern region of the Aswan High Dam, in southern Egypt. The main purpose of this work is the analysis and interpretation of satellite imagery, aeromagnetic and ground gravity data of ...
Ahmed A. Khamies, Mamdouh M. El-Tarras
doaj   +1 more source

Some Problemes on the Aeromagnetic Survey

Journal of the Japanese Association for Petroleum Technology, 1968
Abstract In this paper, the problemes on the magnetic modelling of geological structure and the reduction of magnetic dato are mainly treated. (1) The magnetic compartment in the basement complex, uplift and/or Subsidence of the base ment surface, the sills and the intrusives in the sediment are the cansative bodies of the magnetic anomalies, but the ...
openaire   +2 more sources

Ductile and Brittle Rio Grande Rift Deformation in Oligocene Granite Records a Two‐Stage Rift History in Southern Colorado

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The timing and nature of early deformation in the Rio Grande Rift remains poorly constrained. We present evidence for the earliest structural signature of rift extension in the Sangre de Cristo Range, southern Colorado, based on new geologic mapping, structural analysis, rock magnetic data, and thermochronology. These analyses focus on the ∼30.
Samantha Malavarca, John Singleton, Mark Hudson, Gabrielle Ursin, Jeffrey M. Rahl, Martin Wong, Miriam Primus, Hunter Broeder   +7 more
wiley   +1 more source

An aeromagnetic interference compensation method by combining the XGBoost and genetic algorithm: a case study from Ottawa, Canada

Earth, Planets and Space
Aeromagnetic surveying is an efficient and practical geophysical exploration method that has been widely applied in resource prospecting and environmental monitoring.
Liangfeng Mo, Yuan Yuan, Zijin Li, Wenbo Jin, Da Li, Zhongshan Jiang, Bin Wu, Guochao Wu   +7 more
doaj   +1 more source

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

Distinct Transcrustal Evolutions of Komatiitic Primitive Magma: Implications for the Compositional Dichotomy of Continental Flood Basalts

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The origin of the compositional dichotomy between high‐Ti and low‐Ti basalts in continental flood basalt provinces remains debated. Most existing studies attribute this dichotomy directly to variations in primitive magma composition to circumvent the complexities of significant evolutionary processes, such as multiphase fractional ...
Zongpeng Yang, Tong Hou, Roman Botcharnikov, Evangelos Moulas, Meng Wang, Stephan Buhre, Zhaochong Zhang   +6 more
wiley   +1 more source

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

Shallow thermal activity of Tokachidake Volcano (Japan) investigated through repeated drone-borne magnetic surveys

Earth, Planets and Space
In recent years, new geothermal anomalies have been detected on the northwestern slope of the 62-II crater near the summit of Tokachidake Volcano, Hokkaido, Japan.
Toshiaki Hokari, Ryo Tanaka, Takeshi Hashimoto, Takao Koyama   +3 more
doaj   +1 more source

Drape Related Problems in Aeromagnetic Surveys: The Need for Tight-Drape Surveys

ASEG Extended Abstracts, 2003
The trend towards higher flight height and loose-drape fixed wing surveys has important implications for high-resolution aeromagnetic surveys for mineral exploration, especially for targets such as kimberlites. The IAGSA specifications, implemented by leading airborne geophysical contractors and some Governments, make it virtually impossible to acquire
D.R. Crowan, G.R.J. Cooper
openaire   +1 more source