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Gold-telluride nanoparticles revealed in arsenic-free pyrite.
- Source :
-
American Mineralogist . Aug/Sep2012, Vol. 97 Issue 8/9, p1515-1518. 4p. - Publication Year :
- 2012
-
Abstract
- Pyrite, the most abundant sulfide on Earth and a common component of gold deposits, can be a significant host for refractory gold. This is the first documentation of pore-attached, composite Au-telluride nanoparticles in "arsenic-free" pyrite. Trace elements mapping in pyrite from an intrusion-hosted Au deposit with orogenic overprint (Dongping, China) shows trails of tellurides overlapping Co-Ni-zonation. Intragranular microfracturing, anomalous anisotropy, and high porosity are all features consistent with devolatilization attributable to the orogenic event. The pyrite-hosted nanoparticles are likely the "frozen," solid expression of Te-rich, Au-Ag-Pb-bearing vapors discharged at this stage. Nanoparticle formation, as presented here, provides the "smallest-scale" tool to fingerprint Au-trapping during crustal metamorphism [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0003004X
- Volume :
- 97
- Issue :
- 8/9
- Database :
- Academic Search Index
- Journal :
- American Mineralogist
- Publication Type :
- Academic Journal
- Accession number :
- 79268671
- Full Text :
- https://doi.org/10.2138/am.2012.4207