Results 81 to 90 of about 1,853 (301)

Trace element analysis of placer gold

, 2015
Trace element analysis provides an efficient method of fingerprinting placer gold populations in order to characterize bedrock-source hypogene mineralization style and effects of supergene gold mobilization in surficial settings.
Tetland, Mikkel
core  

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Substantiation of the technology for reducing dilution by changing the direction of water flow in the dredge section

Journal of Degraded and Mining Lands Management
The global demand for gold was considered, as well as the ratio of placer gold to ore. It is revealed that there is an increase in the cost of gold mining.
Victor E Kislyakov, Pavel A Zubov, Alexander S Kokorev   +2 more
doaj   +1 more source

From Food to Power: Hydrogel Thermoelectrics for Ingestible Electronics

Advanced Functional Materials, EarlyView.
We introduce a fully edible thermoelectric–electrochromic platform that harvests heat from food and converts it into a visible color change. N‐type and p‐type hydrogel thermoelectric generators connected in series power anthocyanin‐based electrochromic displays, demonstrating the feasibility of safe, biodegradable, ingestible systems for on‐food ...
Antonia Georgopoulou, Bokeon Kwak, Dario Floreano, Esther Amstad   +3 more
wiley   +1 more source

Remediation of Remains Place Gold Mining Land Using Boiler Ash and Sludge from Palm Oil Liquid Waste Processing [PDF]

BIO Web of Conferences
The activity of placer gold mining has ruined the ecosystem by disturbing the upper soil layers, contaminating waterways, and leading to sedimentation downstream.
Hermis Hermis, Mulyati Sri, Aulia M. Prayogie, Ichwana Ichwana, Simina Silmina, Arahman Nasrul   +5 more
doaj   +1 more source

El Dorado Gold Placer Mining Company

, 1937
EL DORADO GOLD PLACER MINING CO. Finn District (Washington). Powell County. Minerals Yearbook 1937. Pages 407, 426. Operated the dragline and portable washing plant at the Fontana Placer from April to November both in 1935 and 1936.https://digitalcommons.
WPA
core  

Liquid Phase Transmission Electron Microscopy: A Window into the Early Stages of Complex Material Formation

Advanced Functional Materials, EarlyView.
Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum, Vinavadini Ramnarain, Nathaly Ortiz Peña, Dris Ihiawakrim, Clément Sanchez, Ovidiu Ersen   +5 more
wiley   +1 more source

Assessing gold-bearing potential of the Kvarhush area (Western slope of the Urals, Perm krai) [PDF]

Минералогия
The paper examines the morphology and composition of native gold from placers of the Kvarkush region (Perm krai). Using optical and electron microscopy, 149 native gold grains from three placers are studied.
M.D. Shamsutdinov, S.V. Petrov
doaj   +1 more source

Gold-enriched rims on placer gold grains: an evaluation of formational processes

, 2013
Placer gold is frequently reported to assay at overall higher values of fineness than the gold in the rock from which it was liberated. A related phenomenon is the historical discovery of many extremely large gold nuggets (up to 28 lbs) in the ...
Groen, John Corwyn
core  

RECONSTRUCTING 1856-7 CALIFORNIA MINING PATTERNS FROM PLACER GOLD RECOVERED FROM THE WRECK OF THE SS CENTRAL AMERICA

, 2021
The discovery of the SS Central America 1857 shipwreck site provides a time capsule that can be used to address questions about the spatial and temporal patterns of placer mining in California during the peak of the gold rush.
VonSydow, Kathryn Ruth
core