Search Results - "Pyrites."

The paper considers the data, concerning the studying of the pyritized shell Nummulites sp. from the nummulite limestones of simferopolskaya formation (Eocene), referred to the nummulite zones Nummulites nemkovi, N. distans и N. polygyratus. The pyrites of two generations are discovered. The first o...

Full description

The Iberian Pyrite Belt (IPB) contains the world’s largest massive sulfide deposit, and, due to extensive mining developed during the last 200 years, large amounts of mining waste have been abandoned in this area, with roasted pyrite ash being the focus of this study. Polymetallic mining is also cla...

Full description

During an earthquake, physical and chemical transformations lead to alteration and formation of minerals in the gouge layer. Altered and neoformed minerals can be used as tracers of some earthquake processes. In this study, we investigate pyrite and magnetic minerals within the host Chinshui siltsto...

Full description

The use of toxic chemicals as flotation reagents raises concerns about the sustainability of the process and its environmental impact. Xanthates are a family of efficient collectors that find application in the selective recovery of lead, gold and zinc ores, but they are toxic, with the majority of...

Full description

The research uses data from the Mini-TES infrared spectrometer of an Opportunity rover taken at selected locations along its route in Meridiani Planum on Mars. Using emissivity data, the corresponding mineralogical compositions were calculated. Generally, the results are consistent with previous wor...

Full description

For the first time, the mineral composition and structural features of jewelry ammonite from mine OJSC «Mikhailovcement» in Ryazan Region are studied in detail. Ammonites are associated with sediments of Callovian and Oxfordian stages. Ammonites have a complex zonal structure and mainly up to 96 wt....

Full description

Heavy metal ions such as Cu2+, Cd2+, Ni2+, and Zn2+ pose serious threats to water quality and public health due to their toxicity and persistence. In this study, a functionalized pyrite composite (FeS₂ core coated with silica) was synthesized and evaluated for its adsorption performance toward these...

Full description

Although pyrite is the main sedimentary form of sulfur, an ample mechanistic comprehension of its formation in low-sulfate environments is lacking. Applying high depth-resolution multigeochemical and stable sulfur isotope composition (δ34S) analysis of a sediment core recovered from a large shallow...

Full description

Detailed mineralogical examination of ammonites of jewelry quality has been carried out by means of radiographical, X-ray microanalyses and electronic microscopy. The ammonites consist mainly of calcite, apatite and some cells are constituted of phosphorite. The walls and shell’s septums consist of...

Full description

In view of a high-grade secondary copper sulfide ore from Serbia, combined with ore properties and flotation process characteristics, a series of experiments on grinding fineness, regulator, depressant, collector species and their dosage, and regrinding fineness of rougher concentrate were carried o...

Full description

The Iberian Pyrite Belt (IPB), located in SW Spain, is the geographical area where more mining activities related to polymetallic minerals have been developed from around 4000 years before present, being especially intense from the second half of 19th century, generating huge amounts of wastes store...

Full description

The distribution and speciation features of gold in ores and minerals of the Natalkinskoe gold deposit (North-East Russia) are studied using light microscopy (LM), scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDX), X-ray electron probe microanalysis (EPMA), "phase...

Full description

This study examines some relevant limnological and hydrogeochemical characteristics of the most emblematic pit lake of the Iberian Pyrite Belt (IPB). Corta Atalaya (CA) open pit mine is known for its large size and for being one of the most important exploitations of copper in Europe. Despite its hi...

Full description

In the Rhône Valley near the city of Montélimar, a Mw 4.9 surface-rupturing earthquake occurring on the 11th of November 2019 was linked to the reactivation of the NE–SW trending normal La Rouvière fault as a reverse fault mechanism. Here, we present the first in situ calcite U–Pb data acquired on w...

Full description

The content, distribution and speciation of gold in ores of the Natalka deposit (North East Russia) were studied. According to atomic absorption spectrometry (AAS), the vein and veinlet-vein ores are highest grade in gold, whereas veinlet-disseminated ores are lower grade and disseminated ores are p...

Full description

This work reports the synthesis of pyrite (iron disulfide (FeS2)) nanoparticles (NPs) of different morphologies using pulsed laser ablation in liquid (PLAL) in different organic solvents. The impact of the solvent on the morphological, compositional, and optical properties of the synthesized NPs is...

Full description