Results 71 to 80 of about 3,013 (217)

The tectonic evolution of mantle rocks from the lizardophiolite complex, South-West England [PDF]

, 1999
In SW England, a highly deformed and metamorphosed assemblage of ultramafic, mafic and granitic rocks is interpreted to represent a fragment of upper mantle and lower oceanic crust: the Lizard Ophiolite Complex.
Cook, Charles Andrew
core  

Transformation of Refractory Oceanic Lithospheric Mantle by Reactive Melt Infiltration: An Experimental Study on the Roles of Temperature, Melt Volume and Ascent Velocity

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Reactive melt infiltration critically modifies the physical and chemical properties of the oceanic lithospheric mantle (OLM). This process, involving melt‐rock reactions and in situ crystallization, exhibits substantial spatial and temporal variability driven by melt volume and ascent velocity.
Yong‐Sheng Hou, Hong‐Yan Li, Chao Zhang, Yu Wang, Yi‐Gang Xu   +4 more
wiley   +1 more source

Heterogeneous Mantle Metasomatism Controlled by Continental Subduction: Evidence From Post‐Collisional Mafic Rocks in the North Qaidam Orogen

Geochemistry, Geophysics, Geosystems
Post‐collisional mafic rocks not only record geodynamic processes at the end of the orogenic cycle but also retain various clues regarding preceding interactions between subducted slabs and mantle wedges.
Xiangyu Gao, Shengyao Yu, Yu Qi, Lintao Wang, Chuanzhi Li, Xiaocong Jiang, Xingzhou Jiang, Yang Yu   +7 more
doaj   +1 more source

Resistivity Structure of the Alabama‐Oklahoma Lineament and Mississippi Embayment: Insights Into Crustal Weakness, Heat Flow, and Seismicity of the Region

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract The Alabama–Oklahoma Lineament (AOL) is a major crustal boundary that intersects the Mississippi Embayment (ME) and may influence intraplate deformation in the southern United States. We present the first regional magnetotelluric (MT) resistivity models across the AOL–ME system using EarthScope data and two‐dimensional inversion. All southwest–
Kaushik Sarker, Chris Cramer
wiley   +1 more source

Anomalously Low 3He/4He and Elevated Heat Flow in the Northern Apennines Explained by Lithospheric Delamination: A Modeling Approach

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract The 3He/4He ratios measured in 12 CO2‐dominated gas seeps from the Tuscany‐Roman Volcanic Provinces in Italy range between 0.07 and ∼1.6 Ra. Helium and δ13CO2 isotope systematics indicate a dominant crustal source with a variable but significantly lower contribution from the mantle.
Jean de la Paix Izerumugaba, Anne Battani, Frédéric Mouthereau, Anthony Ranchou‐Peyruse   +3 more
wiley   +1 more source

Conditions for melting and metasomatism in the Earth's mantle [PDF]

, 1984
If we know the compositions of mantle rocks at various depths, and the geotherm in different tectonic environments, then the conditions for melting are defined by experimentally determined solidus curves.
Wyllie, Peter J.
core  

Thermodynamic Constraints on H2 Production and Habitability From Mg‐Rich Serpentinites as Mars Analogs

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Serpentinization produces hydrogen and methane through abiotic water‐rock interactions, potentially supporting chemotrophic life in planetary subsurface environments. Serpentine deposits in the Martian Noachian landscapes of Nili Fossae and the Southern Highlands have been considered as potential paleo‐habitable zones. However, the geochemical
Devan M. Nisson, Mohit Melwani Daswani, Emmy B. Hughes, Scott M. Perl, Varsha M. Nair, H. M. T. G. A. Pitawala, Sanjeewa P. K. Malaviarachchi, P. L. Dharmapriya, Meththika Vithanage, Amit Basu Sarbadhikai, Francis Rivera‐Hernández, Suniti Karunatillake   +11 more
wiley   +1 more source

Geochemical and petrophysical characterization of mantle metasomatism beneath the North Tanzanian Divergence, East African rift.

, 2021
International audienceThe North Tanzanian Divergence (NTD) is the prolongation of the eastern branch of the East African Rift and is a place of intense volcanism.
Tiberi, Christel, Parat, Fleurice, Gregoire, Michel, Gibert, Benoit, Gautier, Stéphanie, Clutier, Adeline   +5 more
core   +1 more source

Quantitative Assessment of Peridotite Tectonomagmatic Affinities Using Compositional Data Analysis and Explainable Machine Learning

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Peridotites record the compositional evolution of the lithospheric and asthenospheric mantle across plume‐related lithospheres, convergent margins, and rift‐related volcanic environments; however, their tectonomagmatic affinities are commonly difficult to resolve using traditional low‐dimensional geochemical discrimination diagrams.
Swarnendu Roy, Koushik Sen
wiley   +1 more source

Petrological features of Subei Basin (Eastern China) lithospheric mantle and their relationships with H2O contents in NAMs

, 2010
The Subei basin is located east of the Tanlu fault, a major discontinuity which separates the Archean North China Craton from the Proterozoic Yangtze Craton.
Hao, Yantao
core