Results 61 to 70 of about 2,853,826 (347)
History, Current Situation and Challenges of Gold Mining in Ecuador’s Litoral Region
Land, 2021 Gold mining in Ecuador has been present in the country since Inca times; over the years interest in the mineral has increased, leading to the creation of legislation to control the mining sector in a safe manner.
Carlos Mestanza-Ramón +6 more
semanticscholar +1 more source
Environmental Geochemistry and Health, 2021 Marmato, Colombia, has been an important centre of gold mining since before the first Spanish colonizers arrived in 1536. The Marmato deposit is hosted in a dacite and andesite porphyry stock as sheeted sulphide-rich veinlet systems.
K. Torrance, S. Redwood, A. Cecchi
semanticscholar +1 more source
Experimental Study on Activated Sulfur Selection from High Alkalinity Lead Zinc Flotation Tailings [PDF]
E3S Web of ConferencesThis article takes the flotation tailings of a high sulfur lead-zinc mine in Inner Mongolia as the research object. XRD and BPMA automatic process mineralogical analysis systems are used to analyze the mineral composition of the tailings, and ...
Gao Tengyue +3 more
doaj +1 more source
Lancet Planetary Health, 2021 Summary Background Guyana reported a significant rise in malaria between 2008 and 2014. As there was no evidence of impairment of national malaria control strategies, public health authorities attributed the surge to a temporal increase in gold mining ...
P. M. de Salazar +4 more
semanticscholar +1 more source
Advances in Civil Engineering, 2021 Backfill mining methods are widely used in metal mines. The boundary part of the backfill has a direct effect on the local stability in mining engineering. The distribution of stress on the boundary part of the backfill and surrounding rock had their own
Rong Lu +5 more
doaj +1 more source
International Journal of Environmental Research and Public Health, 2021 Mining sites development have had a significant impact on local socioeconomic conditions, the environment, and sustainability. However, the transformation of camp-type artisanal and small-scale gold mining (ASGM) sites with large influxes of miners from ...
Satomi Kimijima +3 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch +3 more
wiley +1 more source
Advances in Civil EngineeringA series of true triaxial compression (TTC) tests was conducted on granite specimens to investigate their fracture behavior. The granite was sampled from a 1500-m-deep exploration borehole located on the Sanshandao gold field in Shandong Province, China,
Huanxin Liu +4 more
doaj +1 more source
New Contree, 2006 Hierdie artikel ondersoek die reeks kleiner “goudstormlope” wat gedurende die middel 1880’s plaasgevind het tot net na die Eerste Wêreldoorlog in KwaZulu-Natal – histories bekend as Zululand. Goudprospektering was veral aangespoor deur die £1 000 beloning aangebied deur die koloniale regering van Natal aan enige delwer wat ‘n betekenisvolle goudrif in ...
openaire +3 more sources
Entropy‐Driven Design of Low‐Melting‐Point Alloys via Compositionally Complex Strategy
Advanced Engineering Materials, EarlyView.Conventional low‐melting‐point alloys (LMPAs) are limited by a narrow compositional space and inherent property trade‐offs. This review presents an entropy‐driven design strategy that overcomes these limitations, ushering in a new class of low‐melting‐point compositionally complex alloys (LMCCAs).
Yinghui Shang +6 more
wiley +1 more source