Results 41 to 50 of about 2,647 (217)

Geodynamic Significance of Intraplate Basaltic Magmatism From the Western Mediterranean Region

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Dynamic topography changes as mantle convection evolves, making its past surface expression difficult to reconstruct. Widespread Neogene‐Quaternary intraplate basaltic magmatism across the Western Mediterranean Region allows us to test whether dated basalts preserve the mantle thermal structure responsible for regional dynamic support.
Chia‐Yu Tien, Nicky White, Megan Holdt, John Maclennan, Benedict Conway‐Jones   +4 more
wiley   +1 more source

Water and Oxygen Fugacity in the Lithospheric Mantle Wedge beneath the Northern Canadian Cordillera (Alligator Lake)

Geochemistry, Geophysics, Geosystems, 2018
Assessing water contents of subduction zone mantle peridotites can gain insight into the compositions of slab‐derived fluids/melts and the active margin water cycle.
McKensie L. Kilgore, Anne H. Peslier, Alan D. Brandon, William M. Lamb   +3 more
doaj   +1 more source

Quantifying Natural Hydrogen‐Helium Sources and Dynamic Accumulation in Global Sedimentary Basins

Earth's Future, Volume 14, Issue 10, October 2026.
Abstract Despite the scientific and economic importance of hydrogen and helium, their crustal budgets remain poorly quantified. This study systematically assesses the accumulation of natural hydrogen and helium in global sedimentary basins by integrating predictive models for both gases with H2/He ratios.
Yongbo Wei, Quanyou Liu, Thomas J. Algeo, Dongya Zhu, Qingqiang Meng, Huiyuan Xu, Wang Zhang, Xiaoqi Wu, Pengpeng Li, Xiaowei Huang, Yin Fu, Yicheng Mou, Di Zhu, Ziqi Feng, Huaiwei Ni, Fang Hao, Zhijun Jin   +16 more
wiley   +1 more source

Basalt magma interaction with harzburgite and the formation of high-magnesium andesites [PDF]

The interaction of basalt melt with mantle harzburgite at low pressure might result in silica enrichment of the melt by assimilation of orthopyroxene.
Fisk, Martin R.
core   +2 more sources

Combined XRF, XRD, SEM-EDS, and Raman Analyses on Serpentinized Harzburgite (Nickel Laterite Mine, New Caledonia): Implications for Exploration and Geometallurgy

, 2019
Different techniques have been combined to determine the crystallography and the chemical composition of serpentinized harzburgite sampled in a drill core coming from the lower part of the New Caledonia ophiolite.
Beate Orberger (5714225), Stéphanie Gascoin (3798040), Daniel Chateigner (3798031), Beate Orberger, Yassine El Mendili, Sébastien Petit, Daniel Chateigner, Cédric Duée, Stéphanie Gascoin, Cédric Duée (1995391), Henry Pilliere, Henry Pilliere (7296830), Jean-François Bardeau, Jean-François Bardeau (1674574), Sébastien Petit (7296827), Monique Le Guen, Yassine El Mendili (7296824), Monique Le Guen (5714228)   +17 more
core   +2 more sources

Heterogeneity of plastic deformations of olivine in ultramafic rocks of the Baikal-Muya ophiolite belt (north-east of Baikal)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2016
Relevance of the research. Permanently identified signs of plastic flow in ultramafic rocks predetermined an approach to their study as metamorphic rocks. This approach uses non-traditional method of the petrofabric analysis.
Alexey Ivanovich Chernyshov, Elena Egorovna Pugacheva   +1 more
doaj   +2 more sources

Mantle Wedge Metasomatism During Subduction Initiation: Mineral Transformations and Fluid Fluxes (BOIC Ophiolite, Newfoundland)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The soles of ophiolites preserve slices of oceanic crust metamorphosed to amphibolite‐ to granulite‐facies conditions beneath heavily deformed mantle peridotites, providing key records of fluid and mass transfer across nascent subduction interfaces.
Louise Mérit, Philippe Agard, Loïc Labrousse, Benoît Dubacq, Cécile Prigent, Carl Guilmette, Jean H. Bédard, François Fournier‐Roy, Horst R. Marschall, Axel Gerdes, Benjamin Lefeuvre, Alana Hinchey   +11 more
wiley   +1 more source

Geochemistry of the Madawara Igneous Complex, BundelkhandCraton, Central India: Implications for PGE Metallogeny

Open Geosciences, 2015
The southern part of the Bundelkhand cratoncontains a series of a E-W trending mafic and ultramaficrocks, about 40 km in length and 2–4 km wide, that occuras intrusions within the Bundelkhand Gneissic Complex(BnGC). They are confined between the Madawara-
Manavalan Satyanarayanan, Singh Surya Prakash, Balaram Vysetti, Niranjan Mohanty   +3 more
doaj   +1 more source

Lithosphere tearing along STEP faults and synkinematic formation of lherzolite and wehrlite in the shallow subcontinental mantle [PDF]

Solid Earth, 2019
Subduction-transform edge propagator (STEP) faults are the locus of continual lithospheric tearing at slab edges, resulting in sharp changes in the lithospheric and crustal thickness and triggering lateral and/or near-vertical mantle flow.
K. Hidas, K. Hidas, C. J. Garrido, G. Booth-Rea, C. Marchesi, C. Marchesi, J.-L. Bodinier, J.-M. Dautria, A. Louni-Hacini, A. Azzouni-Sekkal, A. Azzouni-Sekkal   +10 more
doaj   +1 more source

Ultramafic pseudotachylytes in high-pressure metamorphogenic peridotite from Luobusha, Tibet: a record of crustal paleo-earthquakes

Frontiers in Earth Science, 2023
In this paper, we report an occurrence of ultramafic pseudotachylytes, providing fault-rock evidence of paleo-earthquakes, from the Luobusha ophiolite complex in the Yarlung Zangbo suture zone.
Haoran Zhang, Xiwei Xu, Saihong Yang
doaj   +1 more source