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TitleVMS exploration: oxygen isotope mapping from top to bottom
AuthorTaylor, B EORCID logo; Peter, J MORCID logo; Laakso, K; Rivard, B
SourceGoldschmidt 2016 conference abstracts; 2016 p. 3094 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20200371
PublisherGeochemical Society
PublisherEuropean Association of Geochemistry
MeetingGoldschmidt2016; Yokohama; JP; June 26-July 1, 2016
Mediaon-line; digital
File formatpdf
ProgramTargeted Geoscience Initiative (TGI-5) Volcanic and sedimentary systems - volcanogenic massive sulphide ore systems
Released2016 06 01
AbstractOxygen isotope mapping to delineate paleo-submarine hydrothermal systems associated with volcanogenic massive sulfide (VMS) deposits is a robust technique for exploration. Early studies in Japan [1] and California [2] documented some features of system tops and bottoms in weakly metamorphosed terranes. Subsequent studies have amplified and extended these findings to VMS deposits of many ages, and in various grades of metamorphism and tectonic settings [3,4,5] supporting a general model [6]. For some hydrothermal systems, the size of the 'thermal footprint' (area of isotopic zoning) broadly correlates with tonnage of VMS mineralization [7]. Whereas high-temperature upflow zones along synvolcanic faults provide vectors for exploration from the footwall [8], hanging wall indicators can be important, particularly in areas of cover. The Izok Lake deposit, Nunavut, Canada is a particularly good example where comparison of lithogeochemical and field-based spectral IR mapping and oxygen isotope mapping clearly indicate the advantages of the isotopic method [3]. Comparisons to other deposit areas, including, Snow Lake [9], Flin Fon [10], Sturgeon Lake [5], and La Ronde [11] indicate the importance of scale and volcanic history in interpretation and application.
Summary(Plain Language Summary, not published)
Analysis of rock samples for stable oxygen isotopes permits the detection and delineation of paleo-hydrothermal systems which, in this case, are related to buried massive sulphide deposits in volcanic terranes.

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