Results 41 to 50 of about 908 (109)

Rifting Evolution of the Central Campos Basin as a Hybrid Rifted Margin: Insights From Tectonic and Magmatic Structures

Tectonics, Volume 45, Issue 1, January 2026.
Abstract Recent observations and drilling campaigns have challenged the typical models for rifted margins by providing evidence for the existence of intermediate cases between the magmatic and amagmatic end‐members. In this contribution, we document the evolution of the Central Campos rifted margin, located in southeast Brazil, based on a combined ...
P. Alvarez, N. Stanton, G. Peron‐Pinvidic, L. Magnavita   +3 more
wiley   +1 more source

Density and P‐wave velocity structure beneath the Paraná Magmatic Province: Refertilization of an ancient lithospheric mantle [PDF]

, 2016
We estimate density and P‐wave velocity perturbations in the mantle beneath the southeastern South America plate from geoid anomalies and P‐wave traveltime residuals to constrain the structure of the lithosphere underneath the Paraná Magmatic Province ...
Bassin C., Cordani U. G., Engdahl E. R., Golub G. H., Hegarty K. A., Inoue H., Laske G., Milani E. J., Molina E. C.   +8 more
core   +1 more source

Tracing Mantle Sources to Tectono–Magmatic Settings: Machine Learning Classification of Basalts Over the Past 1 Billion Years

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract The geochemical heterogeneity of the mantle, recorded by mantle‐derived basalts, offers crucial insights into the evolution of mantle sources. However, recognizing mantle end‐members of basalts is challenging, as traditional trace element proxies yield ambiguous overlapping results in older basalts.
Jilian Jiang, Ross N. Mitchell, Xinyu Zou, Peng Peng, Chong Wang   +4 more
wiley   +1 more source

A review of carbonatitic magmatism in the Paraná-Angola-Namibia (PAN) system. [PDF]

, 2007
Mesozoic to Cenozoic alkaline-carbonatitic complexes from southern Brazil, Angola and Namibia occur along main tectonic lineaments. In general, the alkaline-carbonatite complexes show intrusive/subintrusive, subcircular or oval shaped structures and are ...
CASTORINA F, CENSI, Paolo, COMIN CHAIARAMOTI P, CUNDARI A, GOMES CB   +4 more
core   +1 more source

A Paleotectonic Atlas of the African Plate: Permian to Recent

Journal of Petroleum Geology, Volume 48, Issue 4, Page 231-279, October 2025.
ABSTRACT The fragmentary release of petroleum data defining the deep structure and stratigraphy of African basins has been integrated with existing literature to compile 19 tectonic maps over key geological intervals from Permian to Recent times. African plate margins range in their age of opening from Late Triassic (off Lebanon), through Early/Middle ...
Duncan S. Macgregor, Colin V. Reeves
wiley   +1 more source

Plume–Lithosphere Interaction and the Role of the Mid‐Lithospheric Discontinuity in Craton Delamination

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract We present results from thermo‐mechanical numerical modeling of interactions between thermal, thermo‐compositional, and purely compositional (hydrous) mantle plumes, and a rheologically layered lithosphere containing a mid‐lithospheric discontinuity (MLD). Our simulations show that mantle plume impact can effectively destabilize and delaminate
Alessio Lavecchia, István Kovács, Alexander Koptev, Sierd Cloetingh   +3 more
wiley   +1 more source

Eruption, Emplacement and Internal Architecture of Massive and Super‐Massive Inflated Submarine Basalt Lava Flows, Walvis Ridge Hotspot Track, IODP Expeditions 391/397T

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract Massive submarine basalt flows were sampled at five sites on the Tristan‐Gough‐Walvis hotspot track in the South Atlantic by International Oceanic Discovery Program Expeditions 391/397T, where the plume was interacting with a mid‐ocean ridge, a setting similar to that the of modern Iceland.
John W. Shervais, Jesse L. Scholpp, Mike Widdowson, Wendy R. Nelson, Katherine E. Potter, Stephan Homrighausen, Drew White, David Buchs, Daniel E. Heaton, Aaron Avery, Rajneesh Bhutani, Robert A. Duncan, Cornelia Class, Mbili Tshiningayamwe, Yusuke Kubota, Xiao‐Jun Wang, Tao Wu, William W. Sager, Kaj Hoernle, Tobias Höfig   +19 more
wiley   +1 more source

Hot primary melts and mantle source for the Paraná-Etendeka flood basalt province: New constraints from Al-in-olivine thermometry [PDF]

, 2019
Continental flood basalts (CFB) are amongst the most voluminous volcanic eruptions in Earth's history. They are rapidly emplaced, and in rare cases the thick lava piles are associated with primitive magmas that have high MgO contents. The compositions of
Gibson, SA, Jennings, ES, Maclennan, J
core   +2 more sources

Tectonic Framework and Low‐Oblique Rifting Kinematics of the Campos Basin, Southeastern Brazilian Margin

Tectonics, Volume 44, Issue 6, June 2025.
Abstract Understanding the tectonic framework of extensional margins is fundamental to unraveling kinematics, basement inheritance and magmatism during rifting. Using regional gravity and magnetic surveys, 2D and 3D seismic reflection data and well information in the Campos Basin, we conducted a systematic structural mapping of the syn‐rift building ...
R. A. B. Plawiak, L. P. Magnavita, R. Zanella, N. Stanton, J. P. Oliveira, P. Alvarez, V. Carneiro, M. Iemma, E. Borges, L. Borghi   +9 more
wiley   +1 more source

Revisiting the Stratigraphy and Structure of the Faroe Islands Flood Basalts for Large‐Scale CO2 Storage in Basalt Reservoirs

Basin Research, Volume 37, Issue 3, May/June 2025.
Storing CO2 in volcanic rocks has lately shown promising results; however, volcanic provinces are highly heterogeneous, implying challenges in mapping and exploring for potential CO2 reservoirs. This study showcases the importance of integrating a variety of data types across all scales in a case study in the Faroe Islands Basalt Group, North Atlantic ...
Rakul Maria Ingunardóttir Johannesen, Jana Ólavsdóttir, Lars Ole Boldreel, Óluva Eidesgaard, Kim Senger, Olivier Galland   +5 more
wiley   +1 more source