Results 91 to 100 of about 27,724 (241)

Sintering polycrystalline olivine and polycrystalline clinopyroxene containing trace amount of graphite from natural crystals

Earth, Planets and Space, 2017
Graphite-bearing polycrystalline olivine and polycrystalline clinopyroxene with submicron to micron grain size were successfully sintered from a single crystal of naturally occurring olivine (Fo88–92Fa12–8: Mg1.76–1.84Fe0.16–0.24SiO4) and a single ...
Yumiko Tsubokawa, Masahiro Ishikawa
doaj   +1 more source

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

, 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., Moore, Rory O., Rossman, George R.   +2 more
core   +1 more source

Episodic Rifting of a Large Igneous Province Concentrated Along a Microcontinent Boundary

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Many large igneous provinces (LIPs) comprise once contiguous magmatic products that are now fragmented across multiple tectonic plates. Emplacement of these voluminous magmatic products is commonly coeval with, or shortly followed by, fragmentation into constituent domains.
Jeremy L. Asimus, Hugo K. H. Olierook, Sally A. Gibson, Joanne M. Whittaker, Jacqueline A. Halpin, Nathan R. Daczko, Millard F. Coffin, Daniel E. Heaton, Anthony A. P. Koppers, Kaj Hoernle, Folkmar Hauff, Ivan Belousov   +11 more
wiley   +1 more source

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O- and CO2- Rich Fluids [PDF]

, 2018
The safe application of geological carbon storage depends also on the seismic hazard associated with fluid injection. In this regard, we performed friction experiments using a rotary shear apparatus on precut basalts with variable degree of hydrothermal ...
Andrea, Marzoli, Elena, Spagnuolo, Francois, Passelegue, Giacomel, Piercarlo, Giulio Di Toro,, Nasrrddine, Youbi, Nazzari, Manuela   +6 more
core   +1 more source

Epidote Records (De)hydration From the Seafloor Through Subduction and Underplating: Implications for Subduction Zone Fluid Budgets and Slow Slip

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract When, where, and how much fluid is released from subducting oceanic crust control deformation, element cycling, and magmatism in subduction zones. However, the palimpsest of tectonometamorphic processes in the exhumed rock record complicates the relation of geologic observations to geodynamic models of subduction fluid sources and transport ...
P. C. Lindquist, C. B. Condit, W. F. Hoover, V. E. Guevara, G. S. Epstein   +4 more
wiley   +1 more source

The Effect of Temperature and Physical State of Water on the Frictional Properties of Chlorite‐Altered Basaltic Gouges (Krafla Geothermal Field, Iceland)

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Changes in the physical state of water may alter fault frictional properties in high‐temperature geothermal systems, yet they have been little studied. Here, we perform slide‐hold‐slide experiments to examine the frictional properties (frictional strength μss and frictional healing Δμ) of chlorite‐altered basalt from Krafla Geothermal Field ...
W.‐H. Wu, W. Feng, R. Gomila, T. Tesei, A. K. Mortensen, G. Di Toro   +5 more
wiley   +1 more source

The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]

, 2019
The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto, Cingolani, Carlos Alberto, Etcheverry, Ricardo Oscar, Lajoinie, Maria Florencia, Lanfranchini, Mabel Elena, Recio, C., Sial, A.N.   +6 more
core   +1 more source

Mount Etna as a Leaking Pipe of Magmas From the Low Velocity Zone

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Mount Etna, one of the most active volcanoes on Earth, exhibits unusual characteristics in terms of its geological setting, effusion rate, and volatile content. Mount Etna is closely related to the subduction of the Ionian plate below Eurasia, but, chemically, Mount Etna lavas are akin to intraplate magmatism.
Sebastien Pilet, Jules Reymond, Laetitia Rochat, Rosa Anna Corsaro, Massimo Chiaradia, Luca Caricchi, Othmar Müntener   +6 more
wiley   +1 more source

Water in Eclogite and Pyroxenite Xenoliths From the Bottom 100 km of the Slave Craton (Canada) Mantle Root

Geochemistry, Geophysics, Geosystems
Major and trace elements, including H2O, were determined in garnet and clinopyroxene to constrain the evolution of mantle xenoliths from Diavik, Canada.
Esther Schmädicke, Jürgen Gose, Thomas Stachel   +2 more
doaj   +1 more source

The Electrical Conductivity of the Lower Mantle From High‐Pressure/High‐Temperature Measurements of Pyrolite and Ten Years of Geomagnetic Observations

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Electromagnetic sounding coupled with experimental measurements of electrical conductivity (EC) can provide valuable constraints on the thermochemical state of Earth's lower mantle. Here, we report a new set of experimentally determined EC values of pyrolite, a candidate composition of the lower mantle, between 25 and 80 GPa at room ...
Charlotte Trubowitz, Motohiko Murakami, Federico Munch, Alexander Grayver, Christian Liebske, Amir Khan, Nobuyoshi Miyajima, Pinku Saha, Yoshiyuki Okuda, Georg Spiekermann, Luiz Grafulha Morales   +10 more
wiley   +1 more source