Results 31 to 40 of about 113 (110)

Tracking the Caribbean Magmatic Evolution: The British Virgin Islands as a Transition Between the Greater and Lesser Antilles Arcs

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract The British Virgin Islands (BVI) archipelago, located between the Greater Antilles and the Lesser Antilles, is a key location to study the geodynamic evolution of the Caribbean plate. Geochemistry of the studied samples reveals typical volcanic arc signatures, including a calc‐alkaline affinity, strong negative HFSE anomalies, and LILE ...
Noémie Bosc, Delphine Bosch, Mélanie Noury, Olivier Bruguier, Lény Montheil, Douwe J. J. van Hinsbergen, Jean‐Jacques Cornée, Jonathan Outin, Mélody Philippon   +8 more
wiley   +1 more source

Tectono-metamorphic evolution of the Wadi Hafafit Culmination (central Eastern Desert, Egypt). Implication for Neoproterozoic core complex exhumation in NE Africa

Geologica Acta, 2009
The Neoproterozoic rock assemblages in the Wadi Hafafit Culmination (WHC) can be subdivided into two main units which are separated by the Nugrus Thrust.
H. ABD EL-NABYY, W. FRISCH, W. SIEBEL
doaj  

Adjoint‐Based Marker‐In‐Cell Data Assimilation for Constraining Thermal and Flow Processes From Lagrangian Particle Records

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 2, June 2025.
Abstract Geophysical problems often involve Lagrangian particles that follow surrounding flows and record information about the system, such as the pressure and temperature path recorded in metamorphic rocks. These Lagrangian particles can be useful for constraining unknown parameters, such as their sources and the thermal and flow processes of the ...
Atsushi Nakao, Tatsu Kuwatani, Shin‐ichi Ito, Hiromichi Nagao   +3 more
wiley   +1 more source

Tectonic Setting and Evolution of Anatectic Melt Composition During Prograde Metamorphism up to UHT Metamorphism: Constraints From P–T–t–Melting Path From Rundvågshetta, Lützow–Holm Complex, East Antarctica

Journal of Metamorphic Geology, Volume 43, Issue 5, Page 467-495, June 2025.
ABSTRACT The pressure–temperature–time (P–T–t) evolution of a metapelitic ultrahigh‐temperature (UHT) granulite from Rundvågshetta (Lützow–Holm Complex, East Antarctica) and chemical evolution of partial melt during the prograde metamorphism up to UHT metamorphism are studied in detail.
Kota Suzuki, Tetsuo Kawakami, Tetsu Kogiso, Shuhei Sakata, Fumiko Higashino, Masanori Yokoi, Shumpei Kudo   +6 more
wiley   +1 more source

Linking Cenozoic Magmatism in the North‐Central Tibetan Plateau With Plateau Growth

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Accurate reconstruction of paleo‐crustal and lithospheric thicknesses is crucial for understanding the deep geodynamic processes driving the uplift and growth of the Tibetan Plateau (TP) and their association with Cenozoic magmatism. We reconstruct the Cenozoic crustal thickness evolution of the north‐central TP using a machine learning model ...
Peng Guo, Ting Yang, Wei‐Qiang Ji
wiley   +1 more source

A recalibration of the chlorite?biotite?muscovite geobarometer

Contributions to Mineralogy and Petrology, 1987
Massonne (1981) reported experiments on the composition of muscovite in the assemblage phlogopite-muscovite-K-feldspar-quart. The experimental data have been used to recalculate the equilibrium conditions for the chlorite-muscovite-biotite-quartz assemblage which has been proposed as a new geobarometer by Powell and Evans (1983).
openaire   +1 more source

A Machine Learning Approach to Single Garnet Geothermometry and Application to Tracing the Fingerprint of Superdeep Diamonds

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract Estimating the equilibration temperatures of mantle‐derived garnets is crucial for assessing the diamond potential of kimberlites. Traditional garnet geothermometers require co‐existing mineral data or costly trace element analysis, limiting their practical use.
Qiwei Zhang, Matthew F. Hardman, Thomas Stachel, Ingrid Chinn, Michael Seller, Bruce Kjarsgaard, D. Graham Pearson   +6 more
wiley   +1 more source

Xenolith Constraints on the Mantle Potential Temperature and Thickness of Cratonic Roots Through Time

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract The temperature of the convecting mantle and thickness of the lithosphere control many of Earth's processes. However, there is disagreement regarding the evolution of these quantities through time. We use a global data set of mantle xenoliths and xenocrysts to construct paleogeotherms at different eruption ages (16–1,311 Ma) and estimate the ...
Z. J. Sudholz, A. Copley
wiley   +1 more source

Changes in the Redox State of the Nishinoshima Magmatic System During and After the 2020 Explosive Eruption

Island Arc, Volume 34, Issue 1, January/December 2025.
ABSTRACT Intermittent volcanic activity has continued at Nishinoshima volcano in the Izu–Bonin arc in the western Pacific since 2013, characterized mostly by effusive Strombolian eruptions (Episodes 1–3). Subsequently, the eruption style changed suddenly to explosive violent Strombolian in mid‐June 2020 (Episode 4), after which the volcano entered a ...
Kenta K. Yoshida, Noriko Tada, Tomoki Sato, Erika Tanaka, Hidemi Ishibashi, Yohei Mori, Fukashi Maeno, Yoshihiko Tamura, Shigeaki Ono   +8 more
wiley   +1 more source

Pressure and Temperature Estimation in Greenschist‐Facies Metapelites: An Example From the Variscan Belt in Sardinia

Journal of Metamorphic Geology, Volume 43, Issue 1, Page 21-46, January 2025.
ABSTRACT Phase equilibrium modelling is a powerful method for obtaining pressure–temperature (P–T) estimates in metapelites; however, the advantages, disadvantages, and limitations of applying this technique to greenschist‐facies pelites have received little attention.
A. Petroccia, J. B. Forshaw, P. Lanari, S. Iaccarino, C. Montomoli, R. Carosi   +5 more
wiley   +1 more source