Results 121 to 130 of about 31,421 (268)
MICROTOPOCHEMISTRY AND GEOCHEMICAL FEATURES OF A PYRITE NODULE OF СARBONACEOUS SILTSTONES OF THE SAF′YANOVKA MASSIVE SULFIDE DEPOSIT (CENTRAL URAL) [PDF]
Минералогия, 2017 Pyrite nodules of carbonaceous siltstones of the Saf´yanovka nonmetamorphosed massive sulfide deposit consist of a porous poikilitic pyrite core (zone A), which is partly transformed to metacrystalline pyrite aggregates at the periphery (zones В и С ...
N.P. Safina +3 more
doaj
The effect of mixing thiol collectors in the flotation of pure sulphide ores
, 2012 Includes bibliographical references.Using mixtures of xanthate with either dithiophosphate (DTP) or dithiocarbamate (DTC) has been reported to increase the flotation performance of several sulphide flotation operations.
Castelyn, Daniel Gregory
core
The influence of pyrite content on the flotation of chalcopyrite/pyrite mixtures
, 2014 Available online 20 October 2013In the flotation of copper ores, several processing plants report that copper recovery is affected by the proportion and reactivity of pyrite in the ore, with the effect becoming more intense when the feed particles are ...
Addai-Mensah, J. +9 more
core +1 more source
Journal of Economic Geology, 2015 Introduction Pyrite is the most abundant sulfide mineral in low sulfidation ore deposits. Experimental studies have shown that low-temperature ( 200°C) from hydrothermal or metamorphic fluids (Butler and Rickard, 2000).
Zahra Alaminia +2 more
doaj
CHEMICAL COMPOSITION AND TRACE ELEMENT PATTERN OF A PYRRHOTITE-PYRITE NODULE FROM THE DERGAMYCH CO-BEARING MASSIVE SULFIDE DEPOSIT, SOUTH URALS [PDF]
Минералогия, 2018 Distribution of trace elements of pyrrhotite-pyrite nodule from sulfide-serpentinite «gravelites» of the Dergamysh Co-bearing massive sulfide deposit is studied using LA ICP MS method. The nodule is zonal with a central porous core composed of pyrrhotite
I.Yu. Melekestseva +3 more
doaj
Semiconductor electrochemistry of coal pyrite
, 1992 This project seeks to advance the fundamental understanding of the physicochemical processes occurring at the pyrite/aqueous interface, in the context of coal cleaning, coal desulfurization, and acid mine drainage. A novel approach to the study of pyrite
Osseo-Asare, K.
core +1 more source
, 2012 Pyrite and chalcopyrite mineral samples from Mangampet barite mine, Kadapa, Andhra Pradesh, India are used in the present study. XRD data indicate that the pyrite mineral has a face centered cubic lattice structure with lattice constant 5.4179 Å. Also it
Seshamaheswaramma, K. +5 more
core +1 more source
, 1979 Pyrite and pyrrhotite are the only minerals other than native sulphur used in the manufacture of sulphuric acid. Pyrite is known to occur separately in Amjhore area of Bihar and as associated mineral in the complex base metal sulphides of ...
Altekar, V A +3 more
core
, 1999 Pyrite formation within and directly below sapropels in the eastern Mediterranean was governed by the relative rates of sulphide production and Fe liberation and supply to the organic-rich layers.
Middelburg, J.J. +15 more
core +1 more source
Photosynthetic primary production in the Mesoproterozoic
New Phytologist, Volume 251, Issue 1, Page 64-80, July 2026.Summary The Mesoproterozoic atmosphere had more CO2 and less O2 than at present. While the upper ocean was oxygenated, the deeper ocean was euxinic or ferruginous. Primary production was performed by Chlorobia, Cyanobacteria, Proteobacteria, and Archaeplastida.
Patricia Sánchez‐Baracaldo +1 more
wiley +1 more source