Results 51 to 60 of about 22,061 (230)

Geophysical surveys near Strontian, Highland Region [PDF]

open access: yes, 1986
Reconnaissance VLF-EM and magnetic surveys have bean carried out over Ba- Pb-Zn prospects in an area near Strontian in the Highland Region of Scotland.
Kimbell, G.S.
core  

On the peritidal cycles and their diagenetic evolution in the Lower Jurassic carbonates of the Calcare Massiccio Formation (Central Apennines) [PDF]

open access: yes, 2015
This paper shows the environmental changes and high-frequency cyclicity recorded by Lower Jurassic shallow- water carbonates known as the Calcare Massiccio Formation which crop out in the central Apennines of Italy.
Brandano, Marco   +3 more
core   +1 more source

Phytoremediation of Wastewater From Oil Well Drilling: Potential of Different Plant Species

open access: yesWater Environment Research, Volume 98, Issue 5, May 2026.
Purple fountain grass (Cenchrus setaceus “Rubrum”) is a promising plant for using in constructed wetlands treating complex oil drilling effluents. ABSTRACT This study evaluated the removal of contaminants present in wastewater from oil well drilling in the presence of three plant species: water hyacinth (Eichhornia crassipes), cattail (Typha ...
Thiago Oliveira de Souza   +5 more
wiley   +1 more source

Pelagic barite precipitation at micromolar ambient sulfate

open access: yesNature Communications, 2017
The question of how significant barite deposits were able to form from early Earth’s low-sulfate seas remains controversial. Here, the authors show pelagic barite precipitation within a strongly barite-undersaturated ecosystem, highlighting the ...
Tristan J. Horner   +6 more
doaj   +1 more source

Impact of barite and ilmenite mixture on enhancing the drilling mud weight

open access: yesEgyptian Journal of Petroleum, 2018
It is common knowledge in the technology of drilling fluids, monitoring of the drilling mud weight is critical in developing a mud system that yields good well stability.
M.I. Abdou   +3 more
doaj   +1 more source

The Mountain Pass Rare-Earth Deposits [PDF]

open access: yes, 1954
Rare-earth minerals were discovered near Mountain Pass in northeastern San Bernardino County, Calif., in April 1949, and in the following year the Sulphide Queen carbonate body was found.
Olson, J. C., Pray, L. C.
core  

Spectroscopic study of barite from the Kremikovtsi Deposit (Bulgaria) with implication for its origin [PDF]

open access: yes, 2006
Different genetic types (endogene and supergene) of barite from the Kremikovtsi deposit (Bulgaria) were studied by Laser-induced time-resolved luminescence (LITRL), Infrared (IR) and Raman spectroscopy.
Dimova Maya   +2 more
core   +1 more source

Ediacara Obscura: Unveiling Hidden Magnetisations in the Fen Complex, Southern Norway

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Paleomagnetic directions found in Ediacaran (635–539 Ma) rocks are widely dispersed, which has led to conflicting hypotheses about tectonic regimes and geomagnetic field behavior during this period, and raised doubts about the fidelity of the paleomagnetic record.
Justin A. D. Tonti‐Filippini   +8 more
wiley   +1 more source

Kinetics of barite reduction from refractory barite-sulphide ore

open access: yesMetallurgical and Materials Engineering, 2016
Refractory sulphide–barite ore was reduced with carbon in order to release lead, zinc, and copper sulphide from barite-pyrite base. Mineralogical investigations showed that due to the complex structural-textural relationships of lead, copper and zinc minerals with gangue minerals, it is not possible to enrich the ore using the conventional methods of ...
Sokić, Miroslav   +4 more
openaire   +4 more sources

Industrial mineral resources of Zambia [PDF]

open access: yes, 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  

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