Results 61 to 70 of about 1,086 (189)

Rapid Transition From High‐Pressure Metamorphism to Exhumation Driven by Orogen‐Parallel Extensional Shearing (Adula Unit, Eastern Central Alps)

Tectonics, Volume 45, Issue 2, February 2026.
Abstract In the Central Alps, the Adula unit exposes high‐ and ultra‐high‐pressure (HP‐UHP) metamorphic rocks, providing key insights into the subduction and exhumation dynamics of the former distal European margin. We investigate the San Bernardino Shear Zone (SBSZ), a top‐to‐the‐east extensional shear zone developed within orthogneiss and paragneiss ...
C. Montemagni, R. Monti, N. Malaspina, P. Vannucchi, S. Zanchetta   +4 more
wiley   +1 more source

Pohorje eclogites revisited: Evidence for ultrahigh-pressure metamorphic conditions

Geologija, 2010
Kyanite eclogites from the Pohorje Mountains, Slovenia, are providing the first evidence of ultrahigh-pressureEo-Alpine metamorphism in the Eastern Alps. Polycrystalline quartz inclusions in garnet, omphacite and kyaniteare surrounded by radial fractures
Mirijam Vrabec
doaj  

Combining Petrology and Seismology to Unravel the Plumbing System of a Typical Arc Volcano: An Example From Marapi, West Sumatra, Indonesia

Geochemistry, Geophysics, Geosystems, 2021
Marapi in Sumatra is characterized by frequent short‐lived explosions and small eruptions (Volcanic Explosivity Index 1–2) and in the past 250 years, the volcano has erupted >60 times.
D. Nurfiani, X. Wang, H. Gunawan, H. Triastuty, D. Hidayat, S. J. Wei, B. Taisne, C. Bouvet de Maisonneuve   +7 more
doaj   +1 more source

MODELLING HEAT GENERATION DURING FRICTION AND VISCOPLASTIC DEFORMATION BASED ON THE EXAMPLE OF THE YENISEI SHEAR ZONE (EASTERN SIBERIA)

Геодинамика и тектонофизика, 2021
Deviations of the РТ parameters from the background values, corresponding to the lithostatic pressure and the standard geotherm characteristic of the neighboring crustal blocks of the Yenisei Ridge, were recorded by geothermobarometry in the zones of ...
O. P. Polyansky, A. V. Babichev, A. N. Semenov, V. V. Reverdatto   +3 more
doaj   +1 more source

Origin of Silicic Magmas at Kibblewhite Volcano: Implications for Bimodal Volcanism in the Kermadec Arc

Island Arc, Volume 35, Issue 1, January/December 2026.
ABSTRACT This study investigates the origin of silicic magmas at the Kibblewhite Volcano in the Kermadec arc. Two alternative differentiation pathways are evaluated: fractional crystallization of primary basaltic magmas producing low‐Mg andesites, and fractional crystallization of primary andesitic magmas represented by magnesian andesites.
Yasuhiro Hirai, Yoshihiko Tamura
wiley   +1 more source

Geothermobarometry of mafic and ultramafic xenoliths: examples from Hualalai and Mauna Kea volcanoes, Hawaii

, 2021
Xenoliths of plutonic rocks sporadically torn off by erupting magmas are known to carry valuable information about volcano plumbing systems and the lithosphere in which they emplace.
Ziberna L., Luca Ziberna
core   +1 more source

Magma residence time, ascent rate and eruptive style of the November ash-laden activity during the 2021 Tajogaite eruption (La Palma, Spain)

Volcanica
We combined compositional analyses, crystal size distributions and geothermobarometry of tephra erupted during the 2021 Tajogaite eruption (La Palma, Spain), focusing on samples collected in November 2021 associated with a period of abundant ash emission
Barbara Bonechi, Margherita Polacci, Fabio Arzilli, Jorge Romero, Jonathan Fellowes, Mike Burton   +5 more
doaj   +1 more source

Carbonic Fluids Drive Continental Carbon Cycling as Revealed by the Geochemistry of the Eclogite‐Garnet Peridotite Interface

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Subduction zones regulate Earth's carbon distribution, yet the mechanism of carbon transfer from continental crust to mantle remains elusive. We examined an eclogite‐garnet peridotite interface from the Chinese Continental Scientific Drilling Program in the Sulu orogen, representing the slab–mantle wedge boundary formed during continental ...
Dong‐Bo Tan, Jing Lei, Yilin Xiao, Hai‐Ou Gu, He Sun, Xiangying Ye, Zeng‐Li Guo   +6 more
wiley   +1 more source

Neoproterozoic metamorphic evolution of the Isbjørnhamna Group rocks from south-western Svalbard [PDF]

, 2010
A metamorphosed volcano-sedimentary complex constitutes the Caledonian basement in the south-western part of Wedel Jarlsberg Land, Svalbard. Field, textural and previous thermochronologic data indicate a weak, localized metamorphic Caledonian overprint ...
Daniel K. Holm, Majka, Jaroslaw,, Mazur, Stanislaw, Maciej Manecki, Stanislaw Mazur, Holm, Daniel K., Czerny, Jerzy, Jaroslaw Majka, Jerzy Czerny, Manecki, Maciej   +9 more
core   +2 more sources

Fast and Spatially Heterogeneous Cooling Rates at Amphibolite‐Facies Conditions in the Lepontine Alps (Switzerland)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The Lepontine dome (European Central Alps) is constituted by basement nappes under Alpine regional Barrovian metamorphism, yet the duration and pattern of its post‐peak amphibolite‐facies cooling remain uncertain. We examine garnet‐rim compositional re‐adjustment and employ inverse multicomponent diffusion modeling to estimate apparent cooling
A. Tagliaferri, E. Moulas, S. M. Schmalholz, F. L. Schenker   +3 more
wiley   +1 more source