Results 111 to 120 of about 66,575 (296)

Magmatic and Tectonic Structures in the Crust Beneath Armenia and Surrounding Regions of Lesser Caucasus Inferred From Body‐Wave Earthquake Tomography

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract The Armenian Highlands, a tectonically active segment of the Arabia‐Eurasia collision zone, exhibit widespread Quaternary volcanism, rapid uplift, and intense seismicity. However, the lithospheric processes driving these phenomena remain poorly understood.
Ivan Koulakov, Lilit Sargsyan, Ara Levonyan, Elya Sahakyan, Mikayel Gevorgyan, Khachatur Meliksetian   +5 more
wiley   +1 more source

The Age and Composition of the Voyager Seamounts: Evidence for a Long‐Lived Marquesas Mantle Source

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract We present new observations on the dynamics and locations of deep mantle reservoirs derived from the ages and compositions of Voyager Seamount Chain lava flows. The previously unexplored Voyager Seamount Chain trends NW–SE between the Mid‐Pacific Mountains and the Northwestern Hawaiian Ridge.
Andrea Balbas, Hannah Paradis, Kevin Konrad, Valerie A. Finlayson, Michael Bizimis, Stephanie Anderson, Christopher Kelley, Nicole A. Raineault, Beth N. Orcutt   +8 more
wiley   +1 more source

Crustal Structure Across the Okavango Rift, Botswana: The SEISORZ Wide‐Angle Seismic Experiment

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract The Okavango Rift Zone (ORZ) is an incipient continental rift in Botswana at the terminus of the Southwestern Branch of the East African Rift System. The lack of syn‐rift magmatism and tectonic processes overprinting pre‐rift structures provide an opportunity to investigate incipient‐stage rift processes and the role of pre‐existing structures
J. Pablo Canales, Lucky Moffat, Kebabonye Laletsang, Daniel Lizarralde, Steven Harder, Galen Kaip, Estella A. Atekwana, Motsoptse P. Modisi   +7 more
wiley   +1 more source

Deep Sources of Recent Volcanism in Armenia Inferred From Ambient Noise Tomography

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We perform Rayleigh wave ambient noise tomography to investigate crustal seismic velocity structure and sources of volcanism in Armenia. Armenia, a key part of the tectonically and volcanically active Caucasus‐Anatolia region, is actively being deformed by the ongoing Arabian‐Eurasian continental collision.
Kh. Meliksetian, L. Sargsyan, I. Koulakov, N. Toghramadjian, N. Belovezhets, Y. Berezhnev, G. Navasardyan, E. Grigoryan, A. Vasilevsky, E. Sahakyan   +9 more
wiley   +1 more source

East Meets West: The Trace of the Mesoproterozoic Kibaran Event in the Mantle Lithosphere Beneath Eastern Tanzania

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We present elemental geochemistry and multiple isotopic systematics (Re‐Os, Lu‐Hf, Sm‐Nd and Sr) for mantle peridotite xenoliths from Lashaine in northern Tanzania. We use the data to examine how the major Proterozoic tectono‐thermal events that affected the crust of the western Tanzanian craton are imprinted on the lithospheric mantle in the ...
Sheng‐Hua Zhou, Qiao Shu, Sally A. Gibson, Hong‐Fu Zhang, Jing‐Jing Zhu, Hélène Legros, D. Graham Pearson   +6 more
wiley   +1 more source

Early-Devonian intrusive magmatism of the Urals as indicator critical stage Paleozoic history mobile belt

Литосфера, 2015
It is established that during all-Uralian stage of mantle-type magmatism of Early Devonian age (410-393 Ma) the mantle Ordovician-Silurian magmatism was changed by mantle-crustal and crustal types.
G. B. Fershtater
doaj  

Monazite and Zircon U-Pb and Muscovite 40ar/39ar Geochronology Constraints on the Timing of Magmatism and Mineralization in the Huxingshan Tungsten Deposit, South China

, 2023
Lei Zhu, Bin Li, Anhuai Lu, Dexian Zhang, Jun-Wei Xu   +4 more
openalex   +1 more source

High resolution bathymetric survey on the NW slope of Walvis Ridge, offshore Namibia [PDF]

, 2011
Expedition 17/1 of the German research vessel R/V MARIA S. MERIAN, carried out geophysical surveys and experiments between November and December 2010 in the area around Walvis Ridge, Southeast Atlantic Ocean.
Behrmann, Jan H., Prokoph, Andreas, Shulgin, Alexey   +2 more
core  

Intraplate Volcanism Driven by Slab‐Plume Interaction: Numerical Modeling and Its Application to the Eifel, Massif Central and Hainan Volcanic Areas

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract Intraplate volcanism has long been linked to deep mantle plumes. However, recent studies showed that intraplate magmatism can originate from transition zone dynamics, where lower‐mantle plumes might be ponding, creating a Thermal Boundary Layer (TBL).
Yingying Li, Bernhard Steinberger, Sascha Brune, Eline Le Breton, Anne Glerum, Michaël Pons   +5 more
wiley   +1 more source

Síntesis geocronológica del magmatismo, metamorfismo y metalogenia de Costa Rica, América Central Geochronological synthesis of magmatism, metamorphism and metallogeny of Costa Rica, Central America

Revista Geológica de América Central, 2012
Una recopilación completa de 651 determinaciones de edades radiométricas desde 1968 (415 dataciones 40Ar/39Ar, 211 K/Ar, 5 U/Th, 4 Rb/Sr, 2 U/Pb y de fisión termocronología con zircón), tanto aquellas publicadas desde 1968 como muchas nuevas ...
Guillermo E. Alvarado, Phillipe B. Gans
doaj