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Publikováno v:
Applied Geochemistry. 25:1830-1844
Sorption phenomena are known to play significant roles in metal mobility in mine drainage waters. The present study focuses on sorption phenomena controlling Ni concentrations in contaminated neutral drainage issued from the waste rock piles of the T
Publikováno v:
Applied Surface Science. :156-160
The maximum entropy method (MEM) has been applied to the deconvolution of X-ray photoelectron spectra. Spectral broadening, resulting from extrinsic contributions by the X-ray excitation source and the energy analyser, is removed using a Fourier tran
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science. 328:309-314
Kinetic energy distributions of singly charged, positive 16O+ ions that were sputtered and/or elastically scattered from planar polished surfaces of sphalerite, bornite, chalcopyrite, pentlandite, pyrrhotite, arsenopyrite, pyrite and galena under O2+
Publikováno v:
Surface and Interface Analysis. 26:597-605
Kinetic energy distributions of the secondary ions and scattered ions of O + , Cs + and Ar + (bombardment with primary ions of O-, O 2+, Cs + and Ar + was utilized) were obtained from the elemental surfaces of Mg, Al, Si, Ag and Pb using a modified C
Publikováno v:
Journal of Geochemical Exploration. 60:241-247
The quantitative analysis of trace concentrations of Au in pyrite using a new procedure of SIMS quantification is investigated. Analysis of an Au implanted pyrite standard demonstrates the infinite velocity (IV) method as a viable procedure for evalu
Publikováno v:
Surface Science. 396:266-272
The maximum entropy method (MEM) is a new procedure for deconvoluting exciting line width and instrument resolution contributions from XPS spectra. MEM has been used to obtain additional detail from XPS 2p spectra collected from pyrite, marcasite and
Publikováno v:
Journal of Geochemical Exploration. 56:1-11
The magnetic fraction of sulphide mine tailings immediately above and below the watertable were examined. Samples originated from an experimental test cell at the Mattabi Mine refinery site, Sturgeon Lake, Ontario, Canada. XRD powder patterns of satu
Publikováno v:
Geochimica et Cosmochimica Acta. 59:1079-1090
Samples of natural pyrrhotite and pyrite were fractured within the analytical chamber of an X-ray photoelectron spectrometer. The pristine mineral surfaces were then exposed, in the absence of oxygen, to total doses of 100, 200, 400, 800, 1400, 28,00
Publikováno v:
Geochimica et Cosmochimica Acta. 59:721-733
Angle resolved X-ray photoelectron spectroscopy (ARXPS) of air-oxidized pyrrhotite (Fe 7 S 8 ) surfaces reveals two distinctive compositional zones. The outer most zone is composed of iron oxyhydroxide, whereas the underlying zone is sulphur-rich and