Results 41 to 50 of about 21,265 (256)

Sampling methane in basalt on Earth and Mars [PDF]

open access: yes, 2013
Peer reviewedPublisher ...
Blamey, Nigel J F   +2 more
core   +1 more source

Temperatures in a sinking xenolith [PDF]

open access: yesEos, Transactions American Geophysical Union, 1937
The manuscript for this paper was not submitted.
openaire   +2 more sources

Distribution of Fenitized Crustal Xenoliths in Carbonatite Intrusions, West-Central Arkansas [PDF]

open access: yes, 1981
Crustal xenoliths from carbonatite intrusions in the Morrilton-Perryville Arkansas area display a variety of mineralogical and textural features that suggest that they are fragments of basement crystalline rock that has undergone sodic metasomatism ...
Sharp, John
core   +2 more sources

Contrasting mechanisms for crustal sulphur contamination of mafic magma: evidence from dyke and sill complexes from the British Palaeogene Igneous Province [PDF]

open access: yes, 2018
This is the final version of the article. Available from the Geological Society via the DOI in this record.he addition of crustal sulphur to magma can trigger sulphide saturation, a process fundamental to the development of some Ni–Cu–PGE deposits.
Boyce, AJ   +6 more
core   +1 more source

Helium and strontium isotopes in ultramafic xenoliths

open access: yesChemical Geology, 1986
Abstract The isotopic compositions of He and Sr have been obtained for suites of ultramafic xenoliths brought to the surface by Recent volcanic eruptions in continental environments. Samples include a range of petrologic types from Lashaine, Eledoi and Pello Hill (Tanzania), Bullenmerri maar (Victoria, Australia), Puy Beaunit (Massif Central, France)
Porcelli, DR, O'Nions, R, O'Reilly, S
openaire   +3 more sources

Back-reacted saponite in Jurassic mudstones and limestones intruded by a Tertiary sill, Isle of Skye [PDF]

open access: yes, 2005
The Lón Ostatoin stream section, Trotternish Peninsula, Isle of Skye, exposes a sequence of Middle Jurassic mudstones and limestones which have been locally metasomatized by a transgressive sill of Tertiary age. Limestones in the sequence, including some
Alt   +24 more
core   +2 more sources

Continental Basalts and Mantle Xenoliths

open access: yesEos, Transactions American Geophysical Union, 1985
In this decade of the International Lithosphere Program, much scientific attention is being directed toward the deep continental crust and subadjacent mantle. The petrologic, geochemical, and isotopic signatures of basaltic magmas, which transect much of the lithosphere as they ascend from their site of melting, and of contained cognate and accidental ...
openaire   +2 more sources

Shoshonitic enclaves in the high Sr/Y Nyemo pluton, southern Tibet: Implications for Oligocene magma mixing and the onset of extension of the southern Lhasa terrane [PDF]

open access: yes, 2020
Post-collisional potassic and high Sr/Y magmatism in the Lhasa terrane provides critical constraints on the timing and mechanism of subduction of Indian lithosphere and its role in the uplift of the Tibetan Plateau.
Asimow, Paul D.   +8 more
core  

Deep Source Regions for Back‐Arc Volcanism in the Patagonian Slab Window Imaged by Finite Frequency P and SH Body Wave Tomography

open access: yesGeophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The subduction of the Chile Ridge beneath South America beginning 12–16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46°S. Geodynamic processes associated with the slab window are poorly understood.
Walid Ben‐Mansour   +3 more
wiley   +1 more source

Raising the Roof of the World: Intra‐Crustal Asian Mantle Supports the Himalayan‐Tibetan Orogen

open access: yesTectonics, Volume 44, Issue 9, September 2025.
Abstract The Himalayan‐Tibetan orogen formed via the ongoing collision of India and Asia. Its colossal elevations stem from buoyant crustal roots that doubled in thickness during continental collision, widely believed to result from Indian crust under‐thrusting its Asian counterpart and Asian crustal thickening. However, a single crustal layer of up to
P. Sternai   +11 more
wiley   +1 more source

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