Results 51 to 60 of about 3,307 (182)

Fluid or Melt? Distinguishing Syn‐Deformational Interaction Pathways

Journal of Metamorphic Geology, Volume 43, Issue 8, Page 810-838, October 2025.
ABSTRACT Understanding whether deformation occurred in the presence of aqueous fluid or silicate melt is crucial for interpreting ductile shear zones, impacting their thermal and geochemical evolution, and having rheological consequences. To identify the syn‐deformational fluid type, we investigate contrasting shear zones active during the Alice ...
Hindol Ghatak, Nathan R. Daczko, Sandra Piazolo, Tom Raimondo   +3 more
wiley   +1 more source

Mineralogia dos filões aplito-pegmatíticos litiníferos da região de Segura [PDF]

, 2010
Na região de Segura, os filões aplito-pegmatíticos litiníferos Variscos intruíram o Complexo Xisto-Grauváquico, Câmbrico. Osfilões pegmatíticos são do tipo REL-Li e incluem-se na família dos pegmatitos LCT.
Antunes, I. Margarida H. Ribeiro, Neiva, Ana Margarida R., Silva, M. M. V. G., Silva, Paulo Bravo   +3 more
core   +3 more sources

An overview of lithium resources, geochemistry, exploration, extraction, processing, and applications with a focus on electric vehicles

Journal of Economic Geology
Today, the demand for critical metals like lithium has enhanced significantly, leading to greater exploration, extraction, and utilize these metals. In this comprehensive review, we discuss the different types of lithium resources, minerals, exploration,
Mohammad Hassan Karimpour, Bahareh Borouzi Niyat   +1 more
doaj   +1 more source

Primary crustal melt compositions: Insights into the controls, mechanisms and timing of generation from kinetics experiments and melt inclusions [PDF]

, 2017
We explore the controls, mechanisms and timing of generation of primary melts and their compositions, and show that the novel studies of melt inclusions in migmatites can provide important insights into the processes of crustal anatexis of a particular ...
Acosta-Vigil, Antonio, Bartoli, Omar, Buick, Ian, Cesare, Bernardo, Hermann, J\ue3\ub6rg, London, David, Morgan, George B.   +6 more
core   +1 more source

Zircon (Re)crystallization During Metamorphism: Zircon Paragenesis in the Papua New Guinea Coesite Eclogite Revisited

Journal of Metamorphic Geology, Volume 43, Issue 7, Page 663-680, September 2025.
ABSTRACT The youngest known ultrahigh‐pressure (UHP) eclogite from Tumagabuna Island, a small island of the D'Entrecasteaux Islands chain in Papua New Guinea, exhibits zircon U–Pb age variations spanning a few million years. This age variation complicates the interpretation of the evolution of this high and ultrahigh‐pressure ([U]HP) terrane.
Linus B. Streicher, Fraukje M. Brouwer, Keewook Yi, Suzanne L. Baldwin, Wim van Westrenen   +4 more
wiley   +1 more source

Industrial mineral resources of Zambia [PDF]

, 2000
Zambia has for many years been heavily dependent upon the mining of copper which, combined with cobalt production, represents over 98% of mineral sales and 75% of export earnings (1997 figures).
Mitchell, Clive
core  

Petrochronology of Alkaline Intrusive Magmatism in the Central High‐Atlas (Morocco) and Relationships With Jurassic Salt Diapirism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract A striking feature of the Imilchil alkaline province, in the Moroccan Central High Atlas, is the close association of magmatic intrusions with Triassic sediments exhumed by diapirism. This study reports field, petrographic, geochemical and Sr‐Nd isotopic data, as well as new U‐Pb zircon ages, which allow us to constrain the timing of the ...
Youssef Ahechach, Muhammad Ouabid, Françoise Roger, Fleurice Parat, Otmane Raji, Jean‐Marie Dautria, Valérie Bosse, Cheikh Elwali Malainine, Hicham El Messbahi, Hamza Skikra, Jean‐Louis Bodinier   +10 more
wiley   +1 more source

Zircon Solubility, Metamict ZrSiO4 Replacement, and Hydrothermal Zircon Formation at Upper Crustal Pressures

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract Stable and inert under most conditions, zircon can be dissolved and precipitated by aqueous fluids in the upper crust. Geochemical models using currently available thermodynamic properties for Zr aqueous species at 0.2 GPa predict that zircon solubility increases with temperature from 400 to 900°C in fluids saturated with quartz or baddeleyite.
John C. Ayers, Chen Zhu
wiley   +1 more source

Structural caracterization of potassic feldspars from pegmatites around La Cocha, Villa Praga-Las Lagunas Group, Tilisarao-Renca subgroup and Concarán subgroup, San Luis, Argentina [PDF]

, 2016
Entre los 32º37’02" LS – 65º27’28" LO y 32º39’31" LS – 65º23’36" LO se encuentra un grupo de pegmatitas pertenecientes al Grupo Villa Praga-Las Lagunas, subgrupos Concarán y Tilisarao-Renca.
Lopez, Monica Graciela, Montenegro, Teresita Francis, Wul, Julieta Gisele   +2 more
core  

Effects of F, B2O3 and P2O5 on the solubility of water in haplogranite melts compared to natural silicate melts [PDF]

, 1993
The effects of F, B2O3 and P2O5 on the H2O solubility in a haplogranite liquid (36 wt. % SiO2, 39 wt. % NaAlSi3O8, 25 wt. % KAlSi3O8) have been determined at 0.5, 1, 2, and 3 kb and 800, 850, and 900°C.
Behrens, Harald, Dingwell, Donald B., Holtz, François   +2 more
core   +1 more source