Results 51 to 60 of about 1,956 (204)
, 2023 Determination of the pressures and temperatures at which rocks form is crucial to understanding petrologic processes in Earth. Elastic thermobarometry is a new, simple, technique that has shown early potential to accurately constrain the temperature and ...
Giovanini, Emanuel, 1997-
core
Error sources in single-clinopyroxene thermobarometry and a mantle geotherm for the Novinka kimberlite, Yakutia [PDF]
, 2016 A new suite of 173 clinopyroxene grains from heavy-mineral concentrates of the diamondiferous Novinka kimberlite (Upper Muna field, Yakutia) has been analyzed for major and minor elements with an electron microprobe to perform a thermobarometric study ...
Kuzmin, Dmitry +8 more
core +1 more source
Magma Plumbing During the 2014–2015 Eruption of Fogo (Cape Verde Islands)
Frontiers in Earth Science, 2020 Phenocrysts in volcanic rocks are recorders of magmatic processes that have occurred at depth before and during a volcanic eruption. Our petrological investigations of stratigraphically controlled tephrite and phonotephrite samples from the latest ...
Andreas Klügel +3 more
doaj +1 more source
Tectonics, Volume 45, Issue 8, August 2026.Abstract The timing and nature of early deformation in the Rio Grande Rift remains poorly constrained. We present evidence for the earliest structural signature of rift extension in the Sangre de Cristo Range, southern Colorado, based on new geologic mapping, structural analysis, rock magnetic data, and thermochronology. These analyses focus on the ∼30.
Samantha Malavarca +7 more
wiley +1 more source
Thermodynamic modeling and thermobarometry of metasomatized rocks
, 2013 Determining the P-T conditions at which metasomatism occurs provides insight into the physical conditions at which fluid-rock interaction occurs in the crust.
Goncalves, Philippe +3 more
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract Amphibole compositions record high‐pressure‐temperature (P‐T) hydration processes during magmatism and metamorphism in the deep Earth. However, amphibole thermobarometers calibrated for basic–ultrabasic systems are scarce. To address this issue, we compiled Ca‐amphibole data from published equilibrium experiments and used machine‐learning ...
Wenbo Xu +10 more
wiley +1 more source
An Analysis of an Appalachian Metamorphic Suite [PDF]
, 2011 The Blue Ridge is one of over a dozen provinces located in the much larger Appalachian Mountain Range which spans across the eastern United States. The Appalachian Mountains began to form close to 500 million years ago and rocks within the Blue Ridge ...
Williams, Chadwick A.
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Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract The origin of the compositional dichotomy between high‐Ti and low‐Ti basalts in continental flood basalt provinces remains debated. Most existing studies attribute this dichotomy directly to variations in primitive magma composition to circumvent the complexities of significant evolutionary processes, such as multiphase fractional ...
Zongpeng Yang +6 more
wiley +1 more source
Magma storage and plumbing of adakite-type post-ophiolite intrusions in the Sabzevar ophiolitic zone, northeast Iran [PDF]
Solid Earth, 2015 Subduction-related adakite-type intrusive rocks emplaced into the late Cretaceous–Paleocene Sabzevar ophiolite zone, northeast Iran, range from Mg-andesite to rhyodacite in composition.
K. Jamshidi +4 more
doaj +1 more source
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 +11 more
wiley +1 more source