Results 11 to 20 of about 130,604 (144)

Investigation on tourmaline occurrence in the metamorphic complex in the north of Golpayegan, Sanandaj-Sirjan Zone [PDF]

open access: yesپترولوژی, 2022
The occurrence of tourmaline in the metamorphic complex of the north of Golpayegan is observed within the granitoid mass and schists in contact with granitoid and marbles.Speaking of abundance, tourmaline is less frequently a minor mineral found in ...
Solomon Ahmadi Bonakdar   +2 more
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

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

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

Hydrogen in Nominally Anhydrous Crustal Minerals [PDF]

open access: yes, 2003
Systematic infrared and nuclear magnetic resonance investigations of common crustal minerals were undertaken to better understand the geologic significance of minor components of structural hydrous species within these nominally anhydrous minerals ...
Johnson, Elizabeth Ann
core   +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

The effect of P2O5 on the viscosity of haplogranitic liquid [PDF]

open access: yes, 1993
The effect of P2O5 on the viscosity of a haplogranitic (K2O-Na2O-Al2O3-SiO2) liquid has been determined at 1 atm pressure in the temperature interval of 700 - 1650°C. Viscosity measurements of a haplogranite, haplogranite + 5.1 wt.% P2O5 and haplogranite
Knoche, Ruth   +5 more
core   +1 more source

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  

Effects of alkali dosage and silicate modulus on alkali-silica reaction in alkali-activated slag mortars

open access: yes, 2018
The effects of silicate modulus and alkali dosage on alkali-silica reaction (ASR) of alkali-activated slag (AAS) mortars are investigated under accelerated mortar bar testing conditions as specified in ASTM C1260.
Zhang, Zuhua   +3 more
core   +1 more source

University-Industry-Government Interaction: Drivers for Innovation in Nigeria [PDF]

open access: yes, 2020
This study examines the University-Industry-Government (UIG) collaboration as a potential driver for innovation in Nigeria. While Nelson and Rosenberg (1993), Freeman and Soete (1997) and Lundvall (1998) acknowledge the roles of innovation in economic ...
Alkali, Usman
core   +1 more source

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