Results 61 to 70 of about 4,836 (216)

Gold Mineralizing Potential of the Late Triassic Calcareous, Carbonaceous and Sulfide‐Rich Sedimentary Rocks of the Isatomae Formation in the South Kitakami Belt, Japan

Resource Geology, Volume 76, Issue 1, January/December 2026.
Isatomae Formation illustrating mineralogical and geochemical characteristics. (a) Overview of the Isatomae Formation, showing the marine anoxic environment and related biogenic processes. (b) Deposition of metal‐rich Fe oxyhydroxides were transformed into sulfides through diagenesis and low grade metamorphism.
June Born Born, Yasushi Watanabe, Takuya Echigo, Yoshiaki Kon, Takumi Mimura   +4 more
wiley   +1 more source

Gravity and Magnetic Separation for Concentrating Critical Raw Materials from Granite Quarry Waste: A Case Study from Buddusò (Sardinia, Italy)

Resources
The Critical Raw Materials Act (CRMA), enacted by the European Union (EU) in May 2024, represents a strategic framework that aims to address the growing demand for critical raw materials (CRMs) and reduce dependency on non-EU sources.
Antonello Aquilano, Elena Marrocchino, Carmela Vaccaro   +2 more
doaj   +1 more source

Cation ordering over short range and long range scales in the MgAl2O4-CuAl2O4 series [PDF]

, 2012
A multi-analytical approach using electron microprobe analysis, X‑ray structural refinement, and optical absorption spectroscopy was applied to characterize short-range and long-range structures of synthetic spinel single crystals along the MgAl2O4 ...
Bosi, F., Fregola, ROSA ANNA, Hålenius, U., Skogby, H.   +3 more
core   +1 more source

Allanite in Mantle Eclogite Xenoliths

Journal of Petrology
Abstract Rare-Earth Elements (REE) are key geochemical tracers of crust–mantle differentiation, but there are few direct data on REE-rich minerals in mantle rocks. Here, we report the combined petrography and comprehensive chemical and isotopic characterization of three coesite- and kyanite-bearing eclogite xenoliths from the Udachnaya ...
Denis S Mikhailenko, Sonja Aulbach, Aleksandr S Stepanov, Andrey V Korsakov, Le Zhang, Yi-Gang Xu   +5 more
openaire   +1 more source

Can Multiphase Inclusions in Garnet From Eclogite Facies Rocks Be a Product of Melt or Supercritical Fluid Entrapment During Subduction?

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 891-908, December 2025.
ABSTRACT Dehydration of rocks and minerals during high‐pressure metamorphism is controlled by the thermal structure of the subduction zone and can be traced by the stability fields of hydrous phases. Consistent with the results of experimental works, the content of silicate components in fluids is assumed to increase from the fields of subcritical to ...
Shah Wali Faryad
wiley   +1 more source

Fast and Spatially Heterogeneous Cooling Rates at Amphibolite‐Facies Conditions in the Lepontine Alps (Switzerland)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The Lepontine dome (European Central Alps) is constituted by basement nappes under Alpine regional Barrovian metamorphism, yet the duration and pattern of its post‐peak amphibolite‐facies cooling remain uncertain. We examine garnet‐rim compositional re‐adjustment and employ inverse multicomponent diffusion modeling to estimate apparent cooling
A. Tagliaferri, E. Moulas, S. M. Schmalholz, F. L. Schenker   +3 more
wiley   +1 more source

Inferences on the Mesozoic evolution of the North Aegean from the isotopic record of the Chalkidiki block [PDF]

, 2016
International audienceThe Chalkidiki block is a major domain in the North Aegean that, contrary to other domains in the region, largely escaped thermal perturbations during Tertiary extension.
Brun, Jean-Pierre, Chatzitheodoridis, Elias, Kydonakis, Konstantinos, Monie, Patrick, Poujol, Marc   +4 more
core   +2 more sources

Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu, Guibin Zhang, Lifei Zhang, Shuzhen Wang, Feng Chang   +4 more
wiley   +1 more source

Rare-earth and rare-metal mineralization in late granite of Syrostan massif (Southern Urals)

Литосфера, 2015
The article provides a complete list of Syrostan massif minerals, which includes 47 mineral species. It is shown that the rare-metal and rare-earth mineralization is confined to the late vein facies - granite dykes and pegmatites.
E. P. Makagonov, V. A. Muftahov
doaj   +2 more sources

Cumulate causes for the low contents of sulfide-loving elements in the continental crust [PDF]

, 2017
Despite the economic importance of chalcophile (sulfide-loving) and siderophile (metal-loving) elements (CSEs), it is unclear how they become enriched or depleted in the continental crust, compared with the oceanic crust.
A Gale, AG Tomkins, B Peucker-Ehrenbrink, B Simons, C Annen, C Patten, C Timm, C-TA Lee, C-TA Lee, D Tanner, ES Kiseeva, FE Jenner, FE Jenner, FE Jenner, FE Jenner, FE Jenner, FE Jenner, FE Jenner, Frances Elaine Jenner, G Witt-Eickschen, H Freymuth, H Freymuth, H Palme, HStC O’Neill, HStC O’Neill, J Adam, J Blichert-Toft, J Hermann, J Prytulak, JA Pearce, JJ Wilkinson, JP Richards, JPD Noll, KP Jochum, M Chiaradia, PJ Wallace, R Arevalo, RL Rudnick, S Guillot, SG Nielsen, SS Dare, T Elliott, T Plank, V Matjuschkin, VJM Salters, W Sun, W Yi, WM White, Y Li, Y Li, Z Wang, Z Zhang   +51 more
core   +1 more source