Bustos Rodriguez, Humberto ; Oyola Lozano, Dagoberto ; Rojas Martínez, Yebrayl A. ; Pérez Alcázar, Germán A. ; Flege, Stefan ; Balogh, Adam G. ; Cabri, Louis J. ; Tubrett, Michael (2007)
Mineralogical analysis of auriferous ores from the El Diamante mine, Colombia.
In: Hyperfine Interactions, 175 (1-3)
doi: 10.1007/s10751-008-9603-2
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
X-ray diffraction (XRD), Mössbauer spectrometry (MS), secondary ions mass spectroscopy (SIMS) and laser-ablation microprobe–inductively coupled plasma–mass spectrometry (LAM–ICP–MS) were used to study mineral samples of Colombian auriferous ores collected from the “El Diamante” mine, located in the municipality of Guachavez-Nariño, in Colombia. The samples were prepared as polished thin sections and polished sections. From XRD data, quartz, sphalerite and pyrite were detected and their respective cell parameters were estimated. From MS analyses, pyrite, arsenopyrite and chalcopyrite were identified; their respective hyperfine parameters and respective texture were deduced. Multiple regions of approximately 200 × 200 μm in each sample were analyzed with SIMS; the occurrence of “invisible gold” associated mainly with pyrite and secondarily with arsenopyrite could thus be assigned. It was also found that pyrite is of the arsenious type. Spots from 30 to 40 μm in diameter were analyzed with LAM–ICP–MS for pyrite, arsenopyrite and sphalerite; Au is “homogeneously” distributed inside the structure of the arsenious pyrite and the arsenopyrite (not as inclusions); the chemical composition indicates similarities of this “invisible gold”, forming a solid solution with arsenious pyrite and arsenopyrite. One hundred nineteen and 62 ppm of ‘invisible gold’ was quantified in 21 spots analyzed on pyrite and in 14 spots on arsenopyrite, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Bustos Rodriguez, Humberto ; Oyola Lozano, Dagoberto ; Rojas Martínez, Yebrayl A. ; Pérez Alcázar, Germán A. ; Flege, Stefan ; Balogh, Adam G. ; Cabri, Louis J. ; Tubrett, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Mineralogical analysis of auriferous ores from the El Diamante mine, Colombia |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2007 |
| Verlag: | Springer Netherlands |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Hyperfine Interactions |
| Jahrgang/Volume einer Zeitschrift: | 175 |
| (Heft-)Nummer: | 1-3 |
| DOI: | 10.1007/s10751-008-9603-2 |
| Kurzbeschreibung (Abstract): | X-ray diffraction (XRD), Mössbauer spectrometry (MS), secondary ions mass spectroscopy (SIMS) and laser-ablation microprobe–inductively coupled plasma–mass spectrometry (LAM–ICP–MS) were used to study mineral samples of Colombian auriferous ores collected from the “El Diamante” mine, located in the municipality of Guachavez-Nariño, in Colombia. The samples were prepared as polished thin sections and polished sections. From XRD data, quartz, sphalerite and pyrite were detected and their respective cell parameters were estimated. From MS analyses, pyrite, arsenopyrite and chalcopyrite were identified; their respective hyperfine parameters and respective texture were deduced. Multiple regions of approximately 200 × 200 μm in each sample were analyzed with SIMS; the occurrence of “invisible gold” associated mainly with pyrite and secondarily with arsenopyrite could thus be assigned. It was also found that pyrite is of the arsenious type. Spots from 30 to 40 μm in diameter were analyzed with LAM–ICP–MS for pyrite, arsenopyrite and sphalerite; Au is “homogeneously” distributed inside the structure of the arsenious pyrite and the arsenopyrite (not as inclusions); the chemical composition indicates similarities of this “invisible gold”, forming a solid solution with arsenious pyrite and arsenopyrite. One hundred nineteen and 62 ppm of ‘invisible gold’ was quantified in 21 spots analyzed on pyrite and in 14 spots on arsenopyrite, respectively. |
| Freie Schlagworte: | Mössbauer; Invisible gold; SIMS; XRD; LAM–ICP–MS; Pyrite; Arsenopyrite |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 24 Jun 2009 08:58 |
| Letzte Änderung: | 05 Mär 2013 09:20 |
| PPN: | |
| Sponsoren: | We are grateful to the Central Research Committee of the University of Tolima and COLCIENCIAS, for the financial support; to the GMTF of University of Valle, Colombia, where part of the experimental work was conducted;, to the Institute forMaterials Science of the Darmstadt University of Technology, Darmstadt, Germany, for the SIMS analysis of mineral samples and to Memorial University of Newfoundland (MUN), Canada for the LAM–ICP–MS analysis. |
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