Results 21 to 30 of about 193 (140)

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

Mineralogy and geochemistry of alkali feldspars from the Tanco pegmatite, southeastern Manitoba

open access: yesThe Canadian Mineralogist, 2001
The alkali feldspar paragenetic sequence in the Tanco pegmatite at Bernic Lake, Manitoba, spans the entire crystallization and cooling history of the pegmatite, and includes six different K(Rb)-feldspar and six different albite varieties. Total feldspar modal abundances approach 50% for the entire pegmatite volume. Blocky K-feldspar, aplitic albite and
Jarrod A. Brown   +2 more
openaire   +2 more sources

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

Amazonitic alkali feldspar from the Tanakami Granitic pegmatite, southwest Japan

open access: yesJournal of Mineralogical and Petrological Sciences, 2010
This is the first detailed description of amazonitic alkali feldspar in Japan. The amazonitic feldspar is from pegmatite in the Tanakami Granite, southwest Japan. Macroscopically, the feldspar is characterized by the coexistence of pale blue and white parts.
NAKANO, Satoshi, MAKINO, Kuniaki
openaire   +2 more sources

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

Diffusion-controlled and replacement microtextures in alkali feldspars from two pegmatites: Perth, Ontario and Keystone, South Dakota [PDF]

open access: yesMineralogical Magazine, 2015
AbstractMacro- and micro-perthitic microclines from pegmatites from Perth, Ontario (Wards catalogue 46 E 0510) and Keystone, South Dakota (Wards 46 E 5125) have been studied using light and electron microscopy. A sample of the type perthite from Perth, Ontario (Hunterian Museum, Glasgow, M2361)was compared using light microscopy.
Lee, Martin R., Parsons, Ian
openaire   +2 more sources

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