Results 71 to 80 of about 7,432 (216)

Desenvolvimento de Técnicas de Filtragens e sua Aplicação a Dados Aeromagnéticos da Bacia Amazônica

Brazilian Journal of Geophysics, 1982
ln this work two filtering methods were combined in order to enhance somente features in aeromagnetic maps such as lineaments and anomalies caused by sources of large proportions.
João Batista Corrêa da Silva, José Seixas Lourenço   +1 more
doaj   +1 more source

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

Mapping of Lineament Structures from Aeromagnetic and Landsat Data Over Ankpa Area of Lower Benue Trough, Nigeria

Open Physics, 2019
Structural analysis of aeromagnetic and Landsat data over Ankpa area, Benue state was carried out to delineate the basement topography, hydrocarbon potentials, groundwater availability and the structures that control basin formation.
Ikechukwu Boniface Ijeh, Maxwell Omeje, Faith Onyeujo Oluchi, Sunday Joel Emmanuel, Oladotun Adewoyin Olusegun, Charles Olawole Olukunle   +5 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

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

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

Distribution of igneous rocks in China revealed by aeromagnetic data [PDF]

, 2016
After several decades of aeromagnetic surveys, the measured data now cover nearly the entire Chinese continent and part of the China Sea. These data were first applied in this research and could provide important insights into the distribution of igneous
Yang, Hai, Li, Zhankui, Ding, Yanyun, Li, Wei, Xiong, Shengqing   +4 more
core   +1 more source

Occurrence Characteristics of Magnetite and Aeromagnetic Prospecting Northeast of Hebei Province

, 2022
The occurrence characteristics of magnetite and the methods to quickly and effectively explore are important topics for ore prospecting in the new era.
An-Qi Cao, Wen-Yong Li, Cheng Yang, Jia-Wei Zhao, Yan-Xu Liu, Zhi-Yuan Liu, Shan Gao, Li-Jie Wang   +7 more
core   +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