Results 61 to 70 of about 7,709 (174)

Role of dunite in genesis of primitive MORB

Proceedings of the Japan Academy, Series B, 2005
Dunite and related rocks from the Moho transition zone of the East Pacific Rise (EPR) and the Mid-Cayman Trough (MCT) are examined to know the spreading-rate dependence of their compositions. The rocks from both ridges are basically a reaction product between peridotite and primitive MORB. Despite the large difference of prevalent peridotite chemistry,
openaire   +2 more sources

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, Volume 44, Issue 7, Page 510-536, August 2026.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

From Magma to Atmosphere: Halogen Fluxes During Volcanic Eruptions

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Volcanic eruptions release significant quantities of volatile elements into the atmosphere and stratosphere. Plinian eruptions are particularly efficient at dispersing these elements due to their large magma volumes and high eruption columns.
T. d’Augustin, H. Balcone‐Boissard, G. Boudon, E. Deloule, P. Burckel, J.‐C. Thouret, A. Belousov, M. Belousova, A. Duvernois, S. Bekki, M. Marchand, M. Bonifacie   +11 more
wiley   +1 more source

Evidence of the spreading culmination in the Eastern Tethyan Repno oceanic domain, assessed by the petrology and geochemistry of N-MORB extrusive rocks from the Mt. Medvednica ophiolite mélange (NW Croatia)

Geologia Croatica, 2012
Eastern Tethyan Repno oceanic domain (ROD) from Zagorje-Mid-Transdanubian Shear Zone bounds Meliata-Maliak and Dinaric-Vardar oceanic systems. The domain lacks ophiolite complexes and oceanic rocks are restricted into Early Callovian to Late Valanginian ...
Damir Slovenec, Boško Lugović
doaj   +1 more source

Calcium Solubility of Bridgmanite in Subducted Basalt in Earth's Lower Mantle

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The calcium solubility in bridgmanite and the resulting abundance of davemaoite under lower‐mantle pressure‐temperature conditions have been under debate following a recent report of extensive calcium dissolution in bridgmanite. We experimentally investigated the calcium solubility in bridgmanite in a basaltic composition at pressures up to ...
Chengwei Zhang, Takashi Yoshino, Elias El Ghazaoui, Stella Chariton, Vitali B. Prakapenka, Luo Li, Yanyao Zhang, Jung‐Fu Lin   +7 more
wiley   +1 more source

Изотопно-геохимическая гетерогенность магматических пород террейнов островодужной природы Восточной Камчатки

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
Показаны различия вещественного состава пород, слагающих отдельные вулканические поля в пределах островодужных террейнов Камчатки. Установлено, что для меловых пород северных сегментов Кроноцкого террейна характерны вулканиты низкокалиевой толеитовой ...
Н.В. Цуканов, П.И. Федоров, Д.В. Коваленко   +2 more
doaj   +1 more source

Geochemistry of amphibolites and related graphitic gneisses from the Suchý and Malá Magura Mountains (central Western Carpathians) – evidence for relics of the Variscan ophiolite complex

Geologica Carpathica, 2015
Three small bodies of amphibolites and associated graphitic gneisses from the Suchý and Malá Magura Mountains (Tatric Megaunit, central Western Carpathians) have been studied by petrographic and geochemical methods.
Ivan Peter, Méres Štefan
doaj   +1 more source

Пикриты Камчатско-Корякского региона

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле
Охарактеризованы особенности химического состава и условия становления ультраосновных вулканитов (пикритов) Камчатки и Корякии, с учетом новых данных о тектоническом развитии этих регионов.
З.Г. Бадрединов, Б.А. Марковский   +1 more
doaj   +1 more source

ЗАКОНОМЕРНОСТИ ДИНАМИКИ ОКРАИННОМОРСКОГО МАГМАТИЗМА (КОРЕЙСКО-ЯПОНСКИЙ РЕГИОН)

Литосфера, 2019
Синтез информации по магматическим породам Корейско-Япономорского региона и вулканитам некоторых задуговых бассейнов запада Тихого океана позволил выявить специфику динамики магматизма Японского бассейна.

doaj  

МЕТАВУЛКАНИТЫ КЫРАНСКОГО БЛОКА (ВОСТОЧНОЕ ЗАБАЙКАЛЬЕ)

Литосфера, 2019
Проведенные исследования метабазальтов кулиндинской и ононской свит Кыранского блока условно рифейского возраста показали, что вулканические породы обеих свит близки и доволь- но монотонны по своему химическому составу.

doaj