TY - JOUR
T1 - Gold-telluride nanoparticles revealed in arsenic-free pyrite
AU - Ciobanu, Cristiana L.
AU - Cook, Nigel J.
AU - Utsunomiya, Satoshi
AU - Kogagwa, Masashi
AU - Green, Leonard
AU - Gilbert, Sarah
AU - Wade, Benjamin
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.2138/am.2012.4207
DO - 10.2138/am.2012.4207
M3 - Article
AN - SCOPUS:84866653209
VL - 97
SP - 1515
EP - 1518
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
IS - 8-9
ER -