Results 101 to 110 of about 5,319 (257)

Plagioclase‐Saturated Melt Hygrothermobarometry and Plagioclase‐Melt Equilibria Using Machine Learning

open access: yesGeochemistry, Geophysics, Geosystems
Compositions of plagioclase‐melt pairs are commonly used to constrain temperatures (T), dissolved water contents (H2O) and pressures (P) of pre‐eruptive magma storage and transport.
K. S. Cutler, M. Cassidy, J. D. Blundy
doaj   +1 more source

Crustal growth: Some major problems [PDF]

open access: yes
Fundamental problems with models currently used to explain the genesis and evolution of continental crust were raised. These problems focus around the difficulty of generating the upper continental crust from a lower crustal or mantle protolith without ...
Arculus, R. J.
core   +1 more source

Response to a comment by Chun-Ming Wu on "Quantifying the tectono-metamorphic evolution of pelitic rocks from a wide range of tectonic settings: mineral compositions in equilibrium” [PDF]

open access: yes, 2018
Commonly used thermometer and barometer calibrations are sensitive to mineral assemblage and, thus, bulk-rock composition. Calculated mineral stabilities for an average pelitic rock over a pressure-temperature (PT) range appropriate for normal, thickened,
Caddick, Mark, Thompson, Alan
core   +1 more source

Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]

open access: yes, 2004
Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R.   +2 more
core   +1 more source

Magmatic evolution and architecture of an oceanic intraplate volcano: Vesteris Seamount, Atlantic Ocean

open access: yesFrontiers in Earth Science
Vesteris is a large (33 × 27 km) and young (summit age: 0.65–0.010 Ma) intraplate seamount in the Greenland Sea, formed from ocean island basalt (OIB) magmatism.
L. Beloša   +7 more
doaj   +1 more source

Thermal structure and exhumation history of the Lesser Himalaya in central Nepal [PDF]

open access: yes, 2004
The Lesser Himalaya (LH) consists of metasedimentary rocks that have been scrapped off from the underthrusting Indian crust and accreted to the mountain range over the last ~20 Myr. It now forms a significant fraction of the Himalayan collisional orogen.
Avouac, J. P.   +7 more
core   +1 more source

Lithospheric origin of a diamond from the Rio Sorriso area, Mato Grosso State, Brazil

open access: yesFrontiers in Geochemistry
Diamonds are unique samples that enlarge our vision of the physical and chemical reactions occurring in Earth’s deep, inaccessible mantle. By investigating the minerals and fluids trapped within them, it is possible to ascertain the key conditions ...
A. Angellotti   +11 more
doaj   +1 more source

Discrete magma injections drive the 2021 La Palma eruption. [PDF]

open access: yesSci Adv, 2023
Ubide T   +9 more
europepmc   +1 more source

Metamorphism of the Oddanchatram anorthosite, Tamil Nadu, South India [PDF]

open access: yes
The Oddanchatram anorthosite is located in the Madurai District of Tamil Nadu, near the town of Palni. It is emplaced into a granulite facies terrain commonly presumed to have undergone its last regional metamorphism in the late Archean about 2600 m.y ...
Janardhan, A. S., Wiebe, R. A.
core   +1 more source

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