Variations of sulphur isotope signatures in sulphides from the metamorphosed Ming Cu(?Au) volcanogenic massive sulphide deposit, Newfoundland Appalachians, Canada

详细信息    查看全文

• 作者：Stefanie M. Brueckner ; Stephen J. Piercey ; Graham D. Layne…
• 关键词：Sulphur isotopes ; Sulphides ; Metamorphosed VMS deposit ; In situ SIMS analysis ; Thermochemical sulphate reduction (TSR) ; Sulphur leached from igneous wall rock and/or derived from magmatic fluids ; Newfoundland Appalachians
• 刊名：Mineralium Deposita
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：50
• 期：5
• 页码：619-640
• 全文大小：20,217 KB
• 参考文献：Alt JC, Shanks WC (2011) Microbial sulfate reduction and the sulfur budget for a complete section of altered oceanic basalts, IODP Hole 1256D (eastern Pacific). EPSL 310:73-3. doi:10.-016/?j.?epsl.-011.-7.-27 View Article
  Bachinski DJ (1977) Sulfur isotopic composition of ophiolitic cupriferous sulfide deposits, Notre Dame Bay, Newfoundland. Econ Geol 72:243-57View Article
  Bachinski DJ (1978) Sulfur isotopic composition of thermally metamorphosed cupriferous iron sulfide ores associated with cordierite-antophyllite rocks, Gull Pond, Newfoundland. Econ Geol 73:64-2View Article
  Bailie R, Gutzmer J, Strauss H, Stüeken E, McClung C (2010) Sulfur isotope characteristics of metamorphosed Zn–Cu volcanogenic massive sulfides in the Areachap Group, Northern Cape Province, South Africa. Miner Deposita 45:481-96. doi:10.-007/?s00126-010-0285-8 View Article
  Bischoff JL, Rosenbauer RJ (1983) A note on the chemistry of seawater in the range 350°-00°C. Geochim et Cosmochim Acta 47:139-44View Article
  Bradshaw GD, Rowins SM, Peter JM, Taylor BE (2008) Genesis of the Wolverine volcanic sediment-hosted massive sulfide deposit, Finlayson Lake District, Yukon, Canada: mineralogical, mineral chemical, fluid inclusion, and sulfur isotope evidence. Econ Geol 103:35-0View Article
  Brueckner SM, Piercey SJ, Sylvester PJ, Maloney S, Pilgrim L (2014) Evidence for syngenetic precious metal enrichment in an Appalachian volcanogenic massive sulfide system: The 1806 Zone, Ming Mine, Newfoundland, Canada. Econ Geol 109:1611-642View Article
  ?agatay MN, Eastoe CJ (1995) A sulfur isotope study of volcanogenic massive sulfide deposits of the eastern Black Sea province, Turkey. Min Dep 30:55-6View Article
  Canfield DE (2001) Biogeochemistry of sulfur isotopes. In: Valley JW, Cole, D.R. (ed) Stable isotope geochemistry, vol 43. Reviews in Mineralogy and Geochemistry. pp 607-36
  Castonguay S, Skulski T, van Staal C, Currie M (2009) New insights on the structural geology of the Pacquet Harbour group and Point Rousse complex, Baie Verte peninsula, Newfoundland. Current Res Newfoundland and Labrador Dept of Natural Resources. Geol Surv Rep 09-:147-58
  Claypool GE, Holser WT, Kaplan IR, Sakai H, Zak I (1980) The age curves of sulfur and oxygen isotopes in marine sulfate and their mutual interpretation. Chem Geol 28:199-60View Article
  Cook NJ, Hoefs J (1997) Sulphur isotope characteristics of metamorphosed Cu-(Zn) volcanogenic massive sulphide deposits in the Norwegian Caledonides. Chem Geol 135:307-24View Article
  Crowe DE (1994) Preservation of original hydrothermal ?4S values in greenschist to upper amphibolite volcanogenic massive sulfide deposits. Geol 22:873-76
  Dubé B, Gosselin P, Mercier-Langevin P, Hannington M, Galley A (2007) Gold-rich volcanogenic massive sulphide deposits. In: Goodfellow WD (ed) Mineral deposits of Canada: a synthesis of major deposit-types, district metallogeny, the evolution of geological provinces, and exploration methods, Special Publication No. 5. Geological Association of Canada, Mineral Deposits Division, pp 75-4
  Eastoe CJ, Solomon M, Garcia Palomero F (1986) A sulfur isotope study of the massive and stockwork pyrite deposits at Rio Tinto, Spain. Trans Inst Min Metall Sect B: Appl Earth Sci 95:201-07
  Evans DTW (2004) Epigenetic gold occurrences, Baie Verte Peninsula, (NTS 12H/09, 16 and 12I/01), Newfoundland. Mineral resource report 11. Government of Newfoundland and Labrador, Department of Natural Resources, Geological Survey, St. John's, NL
  Fisher RV (1961) Proposed classification of volcaniclastic sediments and rocks. Geol Soc Am Bull 72:1409-414View Article
  Franklin JM (1993) Volcanic-associated massive sulphide deposits. In: Kirkham RV, Sinclair WD, Thorpe RI, Duke JM (eds) Mineral deposit modeling. Geological Association of Canada, Special Paper 40, pp 315-34
  Franklin JM (1996) Volcanic-associated massive sulphide base metals. In: Eckstrand OR, Sinclair WD, Thorpe RI (eds) Geology of Canadian Mineral Deposit Types. Geological Survey of Canada, Geology of Canada Series no. 8, Ottawa, ON, pp 158-83
  Galley A, Hannington M, Jonasson I (2007) Volcanogenic massive sulphide deposits. In: Goodfellow WD (ed) Mineral Deposits of Canada: a synthesis of major deposit-types, district metallogeny, the evolution of geological provinces, and exploration methods, vol Special publication no. 5. Geological Association of Canada, Mineral Deposits Division, pp 141-61
  Gemmell JB, Sharpe R (1998) Detailed sulfur sotope investigation of the TAG hydrothermal mound and stockwork zone, 26° N, Mid-Atlantic Ridge. In: Herzig PM, Humphris SE, Miller DJ, Zierenberg RA (eds) Proceedings of the Ocean Drilling Program, Scientific Results, vol 158. College Station, TX, pp 71-4
  Gemmell JB, Sharpe R, Jonasson IR, Herzig PM (2004) Sulfur isotope evidence for magmatic contributions to submarine and subaerial gold mineralization: conical seamount and th
• 作者单位：Stefanie M. Brueckner (1)
  Stephen J. Piercey (1)
  Graham D. Layne (1)
  Glenn Piercey (2)
  Paul J. Sylvester (1) (3)
  
  1. Department of Earth Sciences, Memorial University of Newfoundland, 300 Prince Philip Drive, St. John’s, NL, A1B 3X5, Canada
  2. Core Research Equipment and Instrument Training Network (CREAIT), Bruneau Centre for Research and Innovation, Memorial University of Newfoundland, P.O. Box 4200, St. John’s, NL, A1C 5S7, Canada
  3. Department of Geosciences, Texas Tech, 125 Science Bldg., Lubbock, TX, 79049-1053, USA
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geology
  Mineral Resources
  Mineralogy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1866

文摘

The Ming deposit is an early Ordovician, bimodal-mafic Cu–Au volcanogenic massive sulphide (VMS) deposit in the Newfoundland Appalachians that was metamorphosed to upper greenschist/lower amphibolite facies conditions and deformed in the Silurian and Devonian. The Ming deposit consists of several spatially proximal ore bodies of which the 1806 Zone, 1807 Zone, Ming South Up Plunge and Down Plunge and the Lower Footwall Zone are the focus of this paper. The ore bodies have similar stratigraphic sequences. The ore bodies can be divided into (1) a silicified horizon that caps the massive sulphides, (2) semi-massive to massive sulphides and (3) sulphide mineralization in a rhyodacitic footwall. Sulphide mineralization in a rhyodacitic footwall includes (a) sulphide stringers immediately below the semi-massive to massive sulphides and (b) chalcopyrite–pyrrhotite–pyrite stringers distally from semi-massive to massive sulphides in the Lower Footwall Zone. Pyrite, chalcopyrite, pyrrhotite, arsenopyrite and galena were analysed by in situ secondary ion mass spectrometry (SIMS) for sulphur isotope compositions. The isotopic signatures of pyrite, chalcopyrite, pyrrhotite and arsenopyrite fall within a limited range of 2.8 to 12.0?-for semi-massive to massive sulphides and sulphide mineralization in the footwall. The silicified horizon capping the semi-massive to massive sulphides has higher δ 34S (5.8-9.6?-, especially for pyrrhotite (mean, 17.2?±-.2?- n--). The sulphur isotope composition of galena is more heterogeneous, especially within semi-massive to massive sulphides and sulphide stringers, ranging from 0.8 to 17.3?-(mean, 6.1?±-.3?- n--5) and 7.6 to 17.1?-(mean, 13.7?±-.3?- n--), respectively. Geothermometric calculations give insufficient formation and metamorphism temperatures for neighbouring mineral pairs, because sulphides were not in isotopic equilibrium while deposited in early Ordovician or re-equilibrated during Silurian–Devonian metamorphism, respectively. Therefore, original isotopic compositions of sulphides at the Ming deposit have been preserved. Modelling of the source of sulphur shows that: (1) reduced seawater sulphate and (2) sulphur leached from igneous wall rock and/or derived from magmatic fluids are the main sources of sulphur in the Ming deposit. The influence of igneous sulphur (igneous wall rock/magmatic fluids) increases with temperature and is an important sulphur source for the semi-massive to massive sulphides and footwall mineralization, in addition to a contribution from thermochemical sulphate reduction (TSR) of seawater. It is difficult to distinguish between sulphur leached from igneous rocks and magmatic fluid-related sulphur, and it is possible that both sources contributed to the ores at the Ming deposit. In addition to igneous sulphur, the heavy isotopes of the silicified horizon are consistent with the sulphur in this horizon being derived only from thermochemical sulphate reduction of early Ordovician seawater sulphate.