Results 31 to 40 of about 238 (148)

RADIOACTIVITY AND MINERALOGICAL INVESTIGATIONS ON YOUNGER GRANITES OF GABAL SHEIKH EL-ARAB AREA, SOUTHERN SINAI, EGYPT [PDF]

open access: yesDelta Journal of Science, 2006
The younger granites of the studied area vary in composition from monzogranite, syenogranite to alkali feldspar granite. They exhibit silicification, kaolinitization and ferrugination as a result of the post-magmatic hydrothermal alteration.
ABDEL MONEM M. OSMAN   +4 more
doaj   +1 more source

Research advances on rare metal pegmatite deposits

open access: yes地质科技通报, 2021
The pegmatite deposit is one of the most important types of rare metal deposits in the world, and it is also one of the most popular interests in the international deposit research.Significant advances have been made in the latest decades, including the ...
Zilong Ran, Yanjun Li
doaj   +1 more source

In-situ boron isotope and chemical composition of tourmaline in the Gyirong pegmatite, southern Tibet: Implications for petrogenesis and magma source

open access: yesFrontiers in Earth Science, 2023
Leucogranitic rocks, mainly including leucogranite-pegmatite systems, have been found to be widely distributed in the South Tibetan Himalaya, and they have received considerable interest because of their significance in crustal evolution and associated ...
Qiuming Pei   +8 more
doaj   +1 more source

Management and valorisation of delithiated β-spodumene and its processing stream

open access: yesCase Studies in Construction Materials, 2021
In many regions including Australia and South America (Lithium Triangle), lithium mining needs to thrive without compromising natural ecosystems. In particular, extracting lithium from pegmatites produces significant amounts of Delithiated β-spodumene ...
A. Karrech   +4 more
doaj   +1 more source

High‐Pressure Na‐Ca Carbonates in the Deep Carbon Cycle

open access: yesGeophysical Monograph Series, Page 127-136., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Sergey Rashchenko   +2 more
wiley  

+1 more source

P-T path fluid evolution in the Gross Spitzkoppe granite stock, Namibia [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
The Gross Spitzkoppe granite stock (GSS) is a zoned 30 km2 epizonal intrusion that consists of three main granites: 1) medium-grained biotite granite (marginal), 2) a coarse-grained biotite granite, and 3) a central, porphyritic granite.
S. Frindt, M. Poutiainen
doaj   +1 more source

Enhancing Membrane Materials for Efficient Li Recycling and Recovery. [PDF]

open access: yesAdv Mater
This review article systematically explores the recent advances in the membrane processes for lithium cycling and recovery, offering the first correlation between these technologies and technology readiness levels, unveiling the fundamentals for the lithium separation, and providing insights into the future design of membrane materials from both ...
Tian X   +7 more
europepmc   +2 more sources

FIRST FINDS OF BADDELEYITE IN ALKALINE COMPLEX OF THE VISHNEVYE MOUNTAINS, SOUTH URALS [PDF]

open access: yesМинералогия, 2018
Baddeleyite ZrO2 is identified in abundant assemblages with zircon in alkali pegmatites of the Vishnevogorsky complex. The mineral contains Hf, Nb, and Ca in chemical composition. Its occurrence in form of accessory mineral is predicted for various rocks
V.A. Popov, I.A. Blinov
doaj  

ZIRCONOLITE OF ALKALINE PEGMATITES OF THE VISHNEVYE MOUNTAINS: THE FIRST FINDINGS IN THE SOUTH URALS [PDF]

open access: yesМинералогия, 2018
Zirconolite, a complex oxide with an idealized formula (Ca,REE)Zr(Ti,Fe,Nb)2O7 , is an accessory mineral of Nb ores from alkali pegmatites and carbonatites of the Vishnevogorsk alkaline complex (South Urals, Russia).
V.A. Popov   +3 more
doaj  

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