Results 101 to 110 of about 4,071 (179)

Tracking Dehydration Reactions and Fossil Fluid Flux in Shear Zones Using Garnet Microstructures

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 5, Page 394-414, June 2026.
ABSTRACT Shear zones act as preferential fluid pathways during prograde and retrograde stages of metamorphism. Nonetheless, we still have limited knowledge of the drainage and permeability of natural settings. The preserved signature of fluid in exhumed rocks provides insights into fluid flow during burial and exhumation.
Alessandro Petroccia   +7 more
wiley   +1 more source

The Fate of Iron Formations in the Deep Mantle: Constraints From Iron Oxide Reduction Kinetics Experiments

open access: yesGeophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Dense sedimentary iron formations (IFs) subducted into the mantle during Earth's early history, may have descended to the core‐mantle boundary where they could exert strong control on its thermal and seismological properties. A key unanswered question is the extent to which IFs retain their oxidized character in the much more reducing mantle ...
Jemila A. Edmond   +2 more
wiley   +1 more source

Localized Convection in Sputnik Planitia, Pluto

open access: yesGeophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The cellular plains on Sputnik Planitia (SP) are thought to originate from convection in the nitrogen ice layer that fills the basin. Whereas the cells toward the center of SP's cellular plains are wider and interconnected—features explained by vigorous convection—the cells near the margins are smaller and less contiguous, with some appearing ...
C. Jain, V. S. Solomatov, W. B. McKinnon
wiley   +1 more source

Deformation of δ‐AlOOH and Its Solid Solution With Phase H as a Potential Source of Intra‐Slab Seismic Anisotropy in the Mid‐Mantle

open access: yesGeophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Seismic anisotropy is widely observed near subduction zones in the mantle transition zone and uppermost lower mantle, particularly along the western Pacific rim and tracks slabs geometries, implying an additional slab‐related source. Hydrous phases such as δ‐AlOOH and phase H (MgSiO4H2), which form a solid solution (δ‐H) and are stable in cool,
Wentian Wu   +4 more
wiley   +1 more source

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