Late Archean and Early Proterozoic gold-tungsten mineralization in the Zimbabwe Archean craton: Rb-Sr and Sm-Nd isotope constraints

Research Article| January 01, 1996 Late Archean and Early Proterozoic gold-tungsten mineralization in the Zimbabwe Archean craton: Rb-Sr and Sm-Nd isotope constraints D. P. F. Darbyshire; D. P. F. Darbyshire 1Natural Environment Research Council Isotope Geosciences Laboratory, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom Search for other works by this author on: GSW Google Scholar P. E. J. Pitfield; P. E. J. Pitfield 2British Geological Survey, International Division, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom Search for other works by this author on: GSW Google Scholar S. D. G. Campbell S. D. G. Campbell 2British Geological Survey, International Division, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom Search for other works by this author on: GSW Google Scholar Author and Article Information D. P. F. Darbyshire 1Natural Environment Research Council Isotope Geosciences Laboratory, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom P. E. J. Pitfield 2British Geological Survey, International Division, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom S. D. G. Campbell 2British Geological Survey, International Division, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, United Kingdom Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (1): 19–22. https://doi.org/10.1130/0091-7613(1996)024<0019:LAAEPG>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation D. P. F. Darbyshire, P. E. J. Pitfield, S. D. G. Campbell; Late Archean and Early Proterozoic gold-tungsten mineralization in the Zimbabwe Archean craton: Rb-Sr and Sm-Nd isotope constraints. Geology 1996;; 24 (1): 19–22. doi: https://doi.org/10.1130/0091-7613(1996)024<0019:LAAEPG>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Sm-Nd technique has been successfully used to date scheelites from lode gold and tungsten deposits in the Archean Midlands greenstone belt, Zimbabwe. Two phases of mineralization have been established which correlate with Late Archean and Early Proterozoic magmatic events in the region. The gold deposits are mainly structurally controlled and are spatially associated with high strain zones and internal synvolcanic to late-tectonic tonalite plutons. Most gold-bearing structures can be categorized into one of two preferred orientations: parallel to acutely oblique with the main S1 fabric, or crosscutting S1 at a high angle and striking parallel to locally developed D2 structures or fabrics. Sm-Nd dating of scheelite demonstrates that these two structural populations are characterized by discrete phases of gold mineralization. The main S1-parallel gold deposition, dated at 2.66 ± 0.05 Ga, correlates with the Late Archean trondhjemite-tonalite-granodiorite event in Zimbabwe. The S1 discordant phase has yielded an age of 2.41 ± 0.07 Ga, broadly corresponding to the timing of emplacement of the Great Dyke and reactivation of the Late Archean high-strain zones. Sr isotope data provide important constraints on the evolution of the hydrothermal fluids. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.