RT Journal Article
T1 A nanoscale investigation of Carlin-type gold deposits: an atom-scale elemental and isotopic perspective
A1 Gopon, Phillip
A1 Douglas, James O.
A1 Auger, María A.
A1 Hansen, Lars
A1 Wade, Jon
A1 Cline, Jean S.
A1 Robb, Laurence J.
A1 Moody, Michael P.
AB Carlin-type gold deposits are one of the most important gold mineralization styles in the world. Despite their economic importance and the large volume of work that has been published, there remain crucial questions regarding their metallogenesis. Much of this uncertainty is due to the cryptic nature of the gold occurrence, with gold occurring as dispersed nanoscale inclusions within host pyrite rims that formed on earlier formed barren pyrite cores. The small size of the gold inclusions has made determining their nature within the host sulfides and the mechanisms by which they precipitated from the ore fluids particularly problematic. This study combines high-resolution electron probe microanalysis (EPMA) with atom probe tomography (APT) to constrain whether the gold occurs as nanospheres or is dispersed within the Carlin pyrites. APT offers the unique capability of obtaining major, minor, trace, and isotopic chemical information at near-atomic spatial resolution. We use this capability to investigate the atomic-scale distribution of trace elements within Carlin-type pyrite rims, as well as the relative differences of sulfur isotopes within the rim and core of gold-hosting pyrite.
PB GeoScienceWorld
SN 0361-0128
YR 2019
FD 2019-09-01
LK https://hdl.handle.net/10016/30386
UL https://hdl.handle.net/10016/30386
LA eng
NO Funding from the United Kingdom Engineering and Physical Sciences Research Council (EPSRC) under grants EP/K029770/1 and EP/M022803/1, as well as from the United Kingdom Environmental Research Council (NERC) under grant NE/K009540/1
DS e-Archivo
RD 19 may. 2024