Results 91 to 100 of about 1,550 (205)

Cristallochimie du fer dans les chlorites métamorphiques : approche analytique multiéchelle, expérimentale, et implications pétrologiques

open access: yes, 2019
Chorite is a phyllosilicate crystallizing in a wide range of pressure and temperature conditions, among a diversity of rocks : from diagenesis to metamorphic conditions, typically in greenschist facies but also in blueschist and amphibolite facies ...
Masci, Lorella
core  

The Dense MORB Fraction Controls the Dynamic Stability and Hydration Potential of the Mantle Transition Zone

open access: yesGeophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The mantle transition zone (MTZ; ∼410–660 km depth) is a major reservoir of water and mid‐ocean ridge basalt (MORB)‐like materials, yet how composition and hydration regulate its physical stability remains unclear. Using geodynamical modeling, we examine the joint effect of water content and dense MORB fraction on the density, viscosity, and ...
Zhensheng Wang   +6 more
wiley   +1 more source

The role of weathering and aeolian inputs on clay minerals and geochemistry in Podzols on ophiolitic materials

open access: yesGeoderma
The process of podzolization in soils developed from ultramafic materials remains enigmatic, despite a few isolated cases described in subalpine areas under particularly acidifying vegetation and wet microclimatic conditions. The aim of this study was to
Michele E. D’Amico   +4 more
doaj   +1 more source

Geochemical modeling of gold precipitation conditions in the Bloco do Butiá Mine, Lavras do Sul/Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2005
A geochemical modeling of gold deposition was performed using the EQ3/EQ6 software package using conditions inferred from geological, petrographic, geochemical and fluid inclusion data from the Bloco do Butiá gold mine, Lavras do Sul, RS.
André S. Mexias   +6 more
doaj   +1 more source

From Growing Conditions to Composite Performance: Acid‐Engineered Algerian Sisal Fibers for Sustainable Bio‐Epoxy Composites

open access: yesPolymer Composites, Volume 47, Issue 18, Page 16585-16605, 20 September 2026.
High‐Performance Sustainable Ski Core Bio‐Composite Derived from Bio‐Epoxy and Sisal Sibers Systems. ABSTRACT In pursuit of sustainable and high‐performance materials, this work investigates the potential of Algerian sisal fibers as renewable reinforcements in bio‐epoxy composites.
M. A. Kacem   +4 more
wiley   +1 more source

Vacuum Infusion as a Processing Route for Transparent Wood Laminates

open access: yesPolymer Composites, Volume 47, Issue 17, Page 15441-15455, 10 September 2026.
Schematic representation of the fabrication route for transparent wood laminates, including wood veneer delignification, epoxy resin impregnation by vacuum infusion processing, and the final TW‐1 transparent wood laminate. ABSTRACT Transparent wood (TW) has attracted increasing attention as a bio‐based material for daylighting and building‐envelope ...
Letícia Zimermann Pires   +7 more
wiley   +1 more source

Glycerol valorization using Colombian olivine as a catalyst. [PDF]

open access: yesHeliyon, 2023
Villegas-Bolaños PA   +3 more
europepmc   +1 more source

Multi‐proxy sequence stratigraphy of a mixed carbonate–siliciclastic shelf across the Jurassic–Cretaceous transition

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
An integrated facies, MS and XRF‐based approach applied to the Tithonian–Berriasian Sidi Khalif Formation (central Tunisia) resolves five Tithonian and eight Berriasian third‐order sequences, showing how mixed carbonate–siliciclastic shelves record coupled eustatic, climatic and tectonic controls and providing a transferable template for similar mud ...
Hamdi Omar, Adnene Lafi, Chokri Yaich
wiley   +1 more source

Biotites and chlorites as interlayered biotite-chlorite crystal

open access: yes, 1985
With transmission electron microscopy at high resolution, it can be frequently observed in biotites and chlorites that there is mixing of unit biotite and chlorite layers.
Olives Baños, Juan
core   +1 more source

Detrital zircon ages, Lu‐Hf isotopes of zircon grains, Sr‐Nd isotopes on whole rock and geochemistry of Campanian turbidites in the Eastern Pontides (NE Türkiye): A provenance assessment and Gondwana records

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
These findings confirm that the Campanian‐aged Bozbent Member turbiditic sequence in the Eastern Pontides was deposited in an extensional fore‐arc basin and therefore exhibits the petrographic and geochemical characteristics of passive margin sandstones.
Çiğdem Saydam Eker   +6 more
wiley   +1 more source

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