Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Xenotime reveals Caledonian hydrothermal overprint on Neoproterozoic Cu mineralization, East Greenland

    Access Status
    Open access via publisher
    Authors
    Olierook, Hugo K. H.
    Crook, K.
    Sinclair, P.
    Fougerouse, Denis
    Joseph, C.
    Kirkland, Christopher L.
    Kennedy, Allen
    Gao, Hao
    Evans, Noreen
    McDonald, Bradley J.
    Quintero, Raiza R.
    Kumara, Anusha Shantha
    Cameron, G.
    Walsh, B.
    Roberts, M.P.
    McInnes, Brent I. A.
    Date
    2023
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Olierook, H.K.H. and Crook, K. and Sinclair, P. and Fougerouse, D. and Joseph, C. and Kirkland, C.L. and Kennedy, A. et al. 2023. Xenotime reveals Caledonian hydrothermal overprint on Neoproterozoic Cu mineralization, East Greenland. Journal of the Geological Society. 180 (5): jgs2022–141.
    Source Title
    Journal of the Geological Society
    DOI
    10.1144/jgs2022-141
    Additional URLs
    https://pubs.geoscienceworld.org/gsl/jgs/article/180/5/jgs2022-141/624241/Xenotime-reveals-Caledonian-hydrothermal-overprint
    ISSN
    0016-7649
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    John de Laeter Centre (JdLC)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LE130100053
    http://purl.org/au-research/grants/arc/LE1400100150
    http://purl.org/au-research/grants/arc/LE130100219
    URI
    http://hdl.handle.net/20.500.11937/96281
    Collection
    • Curtin Research Publications
    Abstract

    Constraining the age of many types of ore deposits remains challenging because of the lack of radiogenic isotopes incorporated into common ore-forming minerals. The timing of pre-Caledonian-hosted Cu mineralization along the entire c. 1200 km long East Greenland Caledonides remains virtually unknown, hampering our knowledge of ore deposit timing and genesis in a frontier exploration region. Here, automated mineral analysis of a series of nodular, disseminated and vein-hosted Cu-± Pb-mineralized metasedimentary rocks in central East Greenland reveals detrital zircon and hydrothermal xenotime, both amenable to U–Pb geochronology. Detrital zircon geochronology of a co-deposited quartzite reveals an age distribution highly similar to the Cryogenian (c. 700 Ma) upper Eleanore Bay Supergroup. Hydrothermal xenotime U–Pb analyses adjacent to nodular and disseminated chalcocite across three proximal samples have variable amounts of common Pb that together yield a well-defined single discordia with a lower concordia intercept of 438 ± 13 Ma (2σ). This age is within uncertainty of the onset of Caledonian regional metamorphism and granitoid production and clearly post-dates deposition of the upper Eleanore Bay Supergroup by several hundred million years. Considering a published chalcocite Pb–Pb isochron age of 680 ± 65 Ma, the hydrothermal xenotime U–Pb ages imply that Caledonian-driven fluid activity, sourced from metamorphic reactions or from granitoids, remobilized diagenetic Cu and Pb mineralization. Chalcocite Pb–Pb isotopes show that dissolved and reprecipitated portions are volumetrically minor, radiogenic and Pb-poor, implying that fluids stripped most of the Pb from the system. Thus, it is likely that remobilization was localized on the grain scale, although some Cu and Pb was transported away from diagenetic sites, perhaps into veins. Although Caledonian metamorphism and granitoid emplacement is widespread in central East Greenland, the full extent of their roles in upgrading Cu mineralization remains to be ascertained.

    Related items

    Showing items related by title, author, creator and subject.

    • Geochemical characterisation of xenotime formation environments using U-Th
      McNaughton, Neal; Rasmussen, B. (2017)
      Xenotime (YPO4) is a trace component in many metasedimentary and some igneous rocks, altered rocks and many hydrothermal ore assemblages, where it forms in response to a range of different processes from igneous crystallisation ...
    • In situ U–Pb geochronology of xenotime and monazite from the Abra polymetallic deposit in the Capricorn Orogen, Australia: Dating hydrothermal mineralization and fluid flow in a long-lived crustal structure
      Zi, Jianwei; Rasmussen, Birger; Muhling, J.; Fletcher, Ian; Thorne, A.; Johnson, S.; Cutten, H.; Dunkley, Daniel; Korhonen, Fawna (2015)
      The Proterozoic Capricorn Orogen is a major tectonic zone that records the assembly and subsequent reworking of the West Australian Craton. Recent seismic transects across the orogen have identified major crustal structures, ...
    • The timing of gold mineralization across the eastern Yilgarn craton using U–Pb geochronology of hydrothermal phosphate minerals
      Vielreicher, N.; Groves, D.; McNaughton, Neal; Fletcher, I. (2015)
      The highly mineralized Eastern Goldfields of the eastern Yilgarn craton is an amalgamation of dominantly Neoarchaean granitoid-greenstone terranes and domains that record a history of early rifting, followed by westward ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.