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dc.contributor.authorWu, Y.F.
dc.contributor.authorFougerouse, Denis
dc.contributor.authorEvans, Katy
dc.contributor.authorReddy, Steven
dc.contributor.authorSaxey, David
dc.contributor.authorGuagliardo, P.
dc.contributor.authorLi, J.W.
dc.date.accessioned2020-05-21T03:28:44Z
dc.date.available2020-05-21T03:28:44Z
dc.date.issued2019
dc.identifier.citationWu, Y.F. and Fougerouse, D. and Evans, K. and Reddy, S.M. and Saxey, D.W. and Guagliardo, P. and Li, J.W. 2019. Gold, arsenic, and copper zoning in pyrite: A record of fluid chemistry and growth kinetics. Geology. 47 (7): pp. 641-644.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/79362
dc.identifier.doi10.1130/G46114.1
dc.description.abstract

Chemical zoning in minerals records fluid-rock interaction and crystal growth kinetics via texturally complex features, the genesis of which remains a subject of debate. Here, we combined nanoscale secondary ion mass spectrometry (NanoSIMS) and atom probe tomography to better characterize trace-element zoning in a gold (Au)-rich pyrite crystal from the Daqiao epizonal orogenic Au deposit, China. Observations on the micron to atomic scale were used to recognize the multiple processes and mechanisms that created the zoning. Chemically distinct, micron-scale concentric zones of pyrite formed in response to changing fluid composition in a dynamic hydraulic fracturing environment. At a smaller scale, within an Au-rich zone, sector zones of Au, As, and Cu at the micron to sub-micron scale were controlled by the structure of the crystal surface. Micron-scale patchy distribution of Au, As, and Cu and atomic-scale transitions from homogeneous to heterogeneous "island" arsenian pyrite formed as a consequence of heteroepitaxial Stranski-Krastanov growth. Nanoscale Au oscillatory zoning is interpreted as a consequence of diffusion-limited self-organization processes at the crystal-fluid interface. The multiple scales of observation enabled us to see how kinetically driven intrinsic processes interacted with extrinsic factors (e.g., pressure decreases) to produce the complexity in mineral zoning. Nanoscale heterogeneities in Au, As, and Cu present as solid solution in pyrite suggest that interpretation of spikes on microbeam-derived depth-concentration profiles as metallic particles should be treated with caution.

dc.languageEnglish
dc.publisherGEOLOGICAL SOC AMER, INC
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeology
dc.subjectTRACE-ELEMENT
dc.subjectCARLIN-TYPE
dc.subjectSULFUR ISOTOPES
dc.subjectMODEL
dc.subjectDEPOSIT
dc.titleGold, arsenic, and copper zoning in pyrite: A record of fluid chemistry and growth kinetics
dc.typeJournal Article
dcterms.source.volume47
dcterms.source.number7
dcterms.source.startPage641
dcterms.source.endPage644
dcterms.source.issn0091-7613
dcterms.source.titleGeology
dc.date.updated2020-05-21T03:28:43Z
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidEvans, Katy [0000-0001-5144-4507]
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.researcheridEvans, Katy [G-5748-2011]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
dcterms.source.eissn1943-2682
curtin.contributor.scopusauthoridFougerouse, Denis [56418452200]
curtin.contributor.scopusauthoridEvans, Katy [55500036700]
curtin.contributor.scopusauthoridReddy, Steven [7402263354]
curtin.contributor.scopusauthoridSaxey, David [15059256300]


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