Results 91 to 100 of about 93,816 (310)

A mineral reconnaissance survey of the Abington-Biggar-Moffat-area, south-central Scotland [PDF]

, 1979
Panned heavy mineral concentrates, mostly obtained from stream sediments, were collected from 195 sites in the Abington-Biggar-Moffat area. The project area, which lies immediately east of the formerly important mining district of Wanlockhead ...
Dawson, J., Floyd, J.D., Phillip, P.R.
core  

Unusual Compression Behavior of Columbite TiO2 via First-Principles Calculations [PDF]

, 2010
The physical mechanisms behind the reduction of the bulk modulus of a high-pressure cubic TiO2 phase are confirmed by first-principles calculations.
Dong, Xiao, Qian, Guang-Rui, Tian, Yonjun, Wang, Hui-Tian, Zhang, Lixin, Zhou, Xiang-Feng   +5 more
core   +1 more source

Research on the Effect of Carbon Defects on the Hydrophilicity of Coal Pyrite Surface from the Insight of Quantum Chemistry

Molecules, 2019
To investigate the effect of carbon defects on the hydrophilicity of the whole surface of the coal pyrite, the adsorption of the single H2O molecule at different sites of the coal pyrite surface was studied with the DFT calculation.
Peng Xi, Ruixin Ma, Wenli Liu
doaj   +1 more source

Hydrochemical Characteristics of Four Retreating Glacier Forefields Off the Coast of Admiralty Bay (King George Island, Maritime Antarctic): Diverse Sources of Metals and Metalloids

Land Degradation &Development, EarlyView.
ABSTRACT This study examines the impact of geological, marine and anthropogenic sources on metal and metalloid concentrations in the forefields of four glaciers (Ecology, Sphinx, Tower and Windy) on King George Island, Antarctic. Water samples were collected at the beginning and end of the hydrological season (austral summer, December 2021 to February ...
Joanna Potapowicz, Krystyna Kozioł, Joanna Plenzler, Robert Józef Bialik, Justyna Dudek, Marcin Frankowski, Anetta Zioła‐Frankowska, Sara Lehmann‐Konera, Żaneta Polkowska   +8 more
wiley   +1 more source

Flotation Behavior of Complex Sulfide Ores in the Presence of Biodegradable Polymeric Depressants

International Journal of Polymer Science, 2017
In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4 ...
Muhammad Badar Hayat, Lana Alagha, Syed Mohammad Sannan   +2 more
doaj   +1 more source

Re–Os isotope geochronology of the Shangbao pyrite–flourite deposit in southeastern Hunan, South China: Evidence for multiple mineralization events and the role of crust–mantle interaction in polymetallic deposits

Solid Earth Sciences, 2017
In South China, both crustal reworking and crust–mantle interaction were important geological processes during the Paleozoic and Mesozoic eras. However, the relationships between these two processes and metal mineralization are still unknown.
Cheng-Cheng Huang, Hai-Feng Guo, Jie Li, Qiang Wang, Chunfu Zhang, Derek Wyman, Gong-Jian Tang   +6 more
doaj   +1 more source

Trace elements in sedimentary pyrite track redox and nutrient fluctuations in the Ediacaran/Cambrian Bambuí Group, Brazil [PDF]

, 2023
Matheus F. de Lima, Fabrício de Andrade Caxito, Ross R. Large, Indrani Mukherjee, Gabriel Jubé Uhlein, J Hippertt, Samuel Amaral Moura, Juliana Okubo, Lucas V. Warren   +8 more
openalex   +1 more source

Nutrition Status of Trees on Spoil Heaps After Coal Mining Can Be Inferred From Seasonal Dynamics of Foliar Nutrient Concentrations

Land Degradation &Development, EarlyView.
ABSTRACT A stable vegetation cover on given habitat conditions can be one of the possible requirements for post‐mining sites, as it can prevent erosion and dustiness of these anthropogenic surfaces and bring several practical future benefits, such as biomass production and microclimate improvement.
Tomáš Matys Grygar, Michaela Königová, Slavomír Adamec, Gabriela Bílková, Petr Vorm, Věra Hýlová   +5 more
wiley   +1 more source

A Study on Preventing Thermal Runaway of Contaminated Ammonium Nitrate Prill in Bulk Storage

Propellants, Explosives, Pyrotechnics, EarlyView.
Schematic illustration of a contaminated region of ammonium nitrate prill undergoing exothermic decomposition, producing gases containing NOx. The interstitial flow of these heated gases rapidly raises the temperature of ammonium nitrate along the flow path.
Pramith Priyananda, Alex M. Djerdjev, Nathan Paris, Brian S. Hawkett   +3 more
wiley   +1 more source

Sclerite formation in the hydrothermal-vent “scaly-foot” gastropod — possible control of iron sulfide biomineralization by the animal [PDF]

, 2006
A gastropod from a deep-sea hydrothermal field at the Rodriguez triple junction, Indian Ocean, has scale-shaped structures, called sclerites, mineralized with iron sulfides on its foot.
Chiba, Hitoshi, Endo, Kazuyoshi, Hashimoto, Jun, Hirata, Takafumi, Horikoshi, Koki, Kato, Yasuhiro, Kirschvink, Joseph L., Kogure, Toshihiro, Kopp, Robert E., Mizota, Chitoshi, Nealson, Kenneth H., Ozaki, Noriaki, Suga, Akinobu, Suzuki, Yohey, Takai, Ken, Tsuchida, Shinji   +15 more
core   +2 more sources