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Structural controls and origin of gold–silver mineralization in the Grampian Terrane of Scotland and Ireland

Published online by Cambridge University Press:  25 February 2014

P. W. GEOFF TANNER
P. W. GEOFF TANNER*
Affiliation:
School of Geographical and Earth Sciences, University of Glasgow, Gregory Building, Lilybank Gardens, Glasgow G12 8QQ, UK
*
*E-mail: geoff.tanner@virgin.net
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Abstract

Gold-bearing mineral deposits occur over a strike distance of >300 km within the Grampian Terrane of Scotland and Ireland. This terrane consists of Neoproterozoic–Lower Ordovician rocks of the Dalradian Supergroup that were polyphase deformed and metamorphosed during the c. 470 Ma Grampian Orogeny. Sulphide-rich Au–Ag deposits occur in Scotland at Calliachar–Urlar Burn, Tombuie, Tyndrum and Cononish, and in Ireland at Curraghinalt (Omagh), Cavanacaw, Croagh Patrick, Cregganbaun and Bohaun. They are hosted by 0.1–6 m thick quartz veins and have a similar overall mineralogy, including native gold, As, Cu, Fe, Pb and Sn sulphides, with hessite, tetrahedrite and electrum present in the first six localities above. The mineralized quartz veins, which are characterized by open-space textures, crystallized at c. 3–5 km depth in the crust. All of the deposits were structurally controlled and, apart from Curraghinalt, occur within second-order Riedel R, R′ and T fractures resulting from a regional N–S-trending maximum principal stress. These deposits are of Upper Silurian to Lower Devonian (post-Scandian) age, and are inferred to have crystallized from hot, silica-rich metamorphic fluids derived from dehydration reactions at the greenschist/amphibolite-facies boundary. Curraghinalt is an older, Grampian, thrust-related deposit. Plutonic igneous rocks (mainly granitoid) contributed in part to the fluids, which were channelled into major orogen-parallel, strike-slip faults, to be injected by fault-valve pumping into the damage zones and fault breccias of newly formed Riedel fractures. Any residual fluid probably percolated to the ground surface to form Rhynie chert-type hot-springs.

Keywords

DalradianRiedelfracturestrike-slipquartz veinfluiddeposit
Type
Original Articles
Information
Geological Magazine , Volume 151 , Issue 6 , November 2014 , pp. 1072 - 1094
Copyright
Copyright © Cambridge University Press 2014 

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References

Aherne, S., Reynolds, N. A. & Burke, D. J. 1992. Gold mineralization in the Silurian and Ordovician of south Mayo. In The Irish Minerals Industry 1980–1990 (eds Bowden, A. A., Earls, G., O'Connor, P. G. and Pyne, J. F.), pp. 39–49. Irish Association for Economic Geology.Google Scholar
Alderton, D. H. M. 1988. Ag–Au–Te mineralization in the Ratagain complex, northwest Scotland. Transactions of the Institution of Mining and Metallurgy (Section B: Applied Earth Sciences) 97, 171–80.Google Scholar
Alsop, G. I. & Hutton, D. H. W. 1993. Major south-east directed Caledonian thrusting and folding in the Dalradian rocks of mid-Ulster: implications for Caledonian tectonics and mid-crustal shear zones. Geological Magazine 130, 233–44.CrossRefGoogle Scholar
Anderson, E. M. 1951. The Dynamics of Faulting and Dyke Formation with Applications to Britain, 2nd ed. Edinburgh: Oliver & Boyd, 206 pp.Google Scholar
Atherton, M. P. & Ghani, A. A. 2002. Slab breakoff: a model for Caledonian, Late Granite syn-collisional magmatism in the orthotectonic (metamorphic) zone of Scotland and Donegal, Ireland. Lithos 62, 65–85.Google Scholar
Bailey, E. B. & Macgregor, M. 1912. The Glen Orchy Anticline (Argyllshire). Quarterly Journal of the Geological Society, London 68, 164–79.Google Scholar
Baxter, E. F., Ague, J. J. & Depaolo, D. J. 2002. Prograde temperature-time evolution in the Barrovian type-locality constrained by Sm/Nd garnet ages from Glen Clova, Scotland. Journal of the Geological Society, London 159, 71–82.CrossRefGoogle Scholar
Bons, P. D. 2001. The formation of large quartz veins by rapid ascent of fluids in mobile hydrofractures. Tectonophysics 336 (1–4), 1–17.Google Scholar
Chang, Z., Large, R. R. & Maslennikov, V. 2008. Sulfur isotopes in sediment-hosted orogenic gold deposits: evidence for an early timing and a seawater sulfur source. Geology 36, 971–74.Google Scholar
Chapman, R. J., Leake, R. C., Moles, N. R., Earls, G., Cooper, C., Harrington, K. & Berzin, R. 2000. The application of microchemical analysis of alluvial gold grains to the understanding of complex local and regional gold mineralization: A case study in the Irish and Scottish Caledonides. Economic Geology 95, 1753–73.Google Scholar
Chew, D. M. 2001. Basement protrusion origin of serpentinite in the Dalradian. Irish Journal of Earth Sciences 19, 23–35.Google Scholar
Cliff, D. C. & Wolfenden, M. 1992. The Lack gold deposit, Northern Ireland. In The Irish Minerals Industry 1980–1990 (eds Bowden, A. A., Earls, G., O'Connor, P. G. & Pyne, J. F.), pp. 65–75. Irish Association for Economic Geology.Google Scholar
Clifford, J. A. 1992. A note on gold mineralization in County Tyrone. In The Irish Minerals Industry 1980–1990 (eds Bowden, A. A., Earls, G., O'Connor, P. G. and Pyne, J. F.), pp. 45–7. Irish Association for Economic Geology.Google Scholar
Cloos, E. 1955. Experimental analysis of fracture patterns. Geological Society of America Bulletin 66, 241–56.CrossRefGoogle Scholar
Conliffe, J., Selby, D., Porter, S. J. & Feely, M. 2010. Re–Os molybdenite dates from the Ballachulish and Kilmelford igneous complexes (Scottish Highlands): age constraints for late Caledonian magmatism. Journal of the Geological Society, London 167, 297–302.CrossRefGoogle Scholar
Cooper, M. R., Crowley, Q. G., Hollis, S. P., Noble, S. R. & Henney, P. J. 2013. A U–Pb age for the Late Caledonian Sperrin Mountains minor intrusions suite in the north of Ireland: timing of slab break-off in the Grampian terrane and the significance of deep-seated, crustal lineaments. Journal of the Geological Society, London 170, 603–14.CrossRefGoogle Scholar
Cooper, M. R., Crowley, Q. G., Hollis, S. P., Noble, S. R., Roberts, S., Chew, D., Earls, G., Herrington, R. & Merriman, R. J. 2011. Age constraints and geochemistry of the Ordovician Tyrone Igneous Complex, Northern Ireland: implications for the Grampian orogeny. Journal of the Geological Society, London 168, 837–50.CrossRefGoogle Scholar
Corkhill, C., Ixer, R. A. F., Mason, J. S., Irving, D. & Pattrick, R. A. D. 2010. Polymetallic auriferous vein mineralization near Loch Tay, Perthshire, Scotland. Scottish Journal of Geology 46, 23–30.Google Scholar
Coulomb, C. A. 1773. Essai sur une application des regles des maximis et minimis a quelques problemes de statique relatifs a l'architecture. Mémoires présentés par divers savants à l'Académie des Sciences, Paris 7, 343–82.Google Scholar
Cox, S. F. 2005. Coupling between deformation, fluid pressures, and fluid flow in ore-producing hydrothermal systems at depth in the crust. Economic Geology 100, 39–75.Google Scholar
Craw, D. 1990. Regional fluid and metal mobility in the Dalradian metamorphic belt, Southern Grampian Highlands, Scotland. Mineralium Deposita 25, 281–8.Google Scholar
Craw, D. & Chamberlain, C. P. 1996. Meteoric incursion and oxygen fronts in the Dalradian metamorphic belt, southwest Scotland: a new hypothesis for regional gold mobility. Mineralium Deposita 31, 365–73.CrossRefGoogle Scholar
Craw, D., Upton, P., Yu, B.-S., Horton, T. & Chen, Y.-G. 2010. Young orogenic gold mineralisation in active collisional mountains, Taiwan. Mineralium Deposita 45, 631–46.Google Scholar
Curtis, S. F., Pattrick, R. A. D., Jenkin, G. R. T., Fallick, A. E., Boyce, A. J. & Treagus, J. E. 1993. Fluid inclusion and stable isotope study of fault-related mineralization in Tyndrum area, Scotland. Transactions of the Institute of Mining and Metallurgy (Section B: Applied Earth Sciences) 102, 39–47.Google Scholar
Davis, G. H., Bump, A. P., Garcia, P. E. & Ahlgren, S. G. 1999. Conjugate Riedel deformation band shear zones. Journal of Structural Geology 22, 169–90.Google Scholar
Dearman, W. R. 1963. Wrench-faulting in Cornwall and South Devon. Proceedings of the Geologists’ Association 74, 265–87.Google Scholar
Dewey, J. F. 2005. Orogeny can be very short. Proceedings of the National Academy of Sciences, USA 102, 15286–93.Google Scholar
Dewey, J. F. & Strachan, R. A. 2003. Changing Silurian–Devonian relative plate motion in the Caledonides: sinistral transpression to sinistral transtension. Journal of the Geological Society, London 160, 219–29.Google Scholar
Dietrich, A., Gutierrez, R., Nelson, E. P. & Layer, P. W. 2011. Geology of the epithermal Ag–Au Huevos Verdes vein system and San Jose district, Deseado massif, Patagonia, Argentina. Mineralium Deposita 47, 233–49.Google Scholar
Dominy, S. C., Platten, I. M., Xie, Y. & Sangster, C. J. S. 2009. Analysis of geological mapping data at the Cononish Gold-Silver Mine, Perthshire, Scotland. In Proceedings of the Seventh International Mining Geology Conference, Perth, WA, pp. 187–96. Melbourne: The Australasian Institute of Mining and Metallurgy.Google Scholar
Earls, G., Clifford, J. A. & Meldrum, A. H. 1992. Curraghinalt gold deposit, County Tyrone, Northern Ireland. In The Irish Minerals Industry 1980–1990 (eds Bowden, A. A., Earls, G., O'Connor, P. G. & Pyne, J. F.), pp. 50–51. Irish Association for Economic Geology.Google Scholar
Fortey, N. J. & Smith, C. G. 1986. Stratabound mineralisation in the Dalradian rocks near Tyndrum, Perthshire. Scottish Journal of Geology 22, 377–93.CrossRefGoogle Scholar
Garson, M. S. & Plant, J. A. 1973. Alpine type ultramafic rocks and episodic mountain building in the Scottish Highlands. Nature 242 (116), 34–8.Google Scholar
Griffith, A. A. 1920. The phenomena of rupture and flow in solids. Philosophical Transactions of the Royal Society A 221, 163–98.Google Scholar
Groves, D. I., Goldfarb, R. J., Robert, F. & Hart, C. J. R. 2003. Gold deposits in metamorphic belts: overview of current understanding, outstanding problems, future research and exploration significance. Economic Geology 98, 1–29.Google Scholar
Hall, J. 1985. Geophysical constraints on crustal structure in the Dalradian region of Scotland. Journal of the Geological Society, London 142, 149–55.Google Scholar
Hall, A. J. 1993. Stratiform mineralisation in the Dalradian of Scotland. In Mineralisation in the British Isles (eds Pattrick, R. A. D. and Polya, D. A.), pp 38–101. London: Chapman and Hall.Google Scholar
Hancock, P. L. 1965. Axial-trace-fractures and deformed concretionary rods in south Pembrokeshire. Geological Magazine 102, 143–63.Google Scholar
Hawson, C. A. & Hall, A. J. 1987. Middle Dalradian Corrycharmaig serpentinite, Perthshire, Scotland: an ultramafic intrusion. Transactions of the Institute of Mining and Metallurgy (Section B: Applied Earth Sciences) 96, B173–7.Google Scholar
Hill, N. J., Jenkin, G. R. T., Boyce, A. J., Sangster, C. J. S., Catterall, D. J., Holwell, D. A., Naden, J., Gunn, G. & Rice, C. M. 2011. New gold occurrences in the Scottish Dalradian, UK – nature and constraints on genesis. In Fermor 2011 – Ore Deposits in an Evolving Earth, Abstract Book, p. 25. London: The Geological Society.Google Scholar
Hill, N. J., Jenkin, G. R. T., Holwell, D. A., Catterall, D., Boyce, A. J., Mark, D., Naden, J. & Rice, C. M. 2013. How the Neoproterozoic S-isotope record illuminates the genesis of vein gold systems: an example from the Dalradian Supergroup in Scotland. In Ore Deposits in an Evolving Earth (eds Jenkin, G. R. T., Lusty, P. A. J., McDonald, I., Smith, M. P., Boyce, A. J. & Wilkinson, J. J.). Geological Society of London, Special Publication no. 393. Published online 22 November 2013. doi: 10.1144/SP393.9.Google Scholar
Hollis, S. P., Roberts, S., Cooper, M. R., Earls, G., Herrington, R., Condon, D. J., Cooper, M. J., Archibald, S. M. & Piercey, S. J. 2012. Episodic arc-ophiolite emplacement and the growth of continental margins: late accretion in the Northern Irish sector of the Grampian–Taconic orogeny. Geological Society of America Bulletin 124, 1702–23.Google Scholar
Hubbert, M. K. & Rubey, W. W. 1959. Role of fluid pressure in the mechanisms of overthrust faulting. Geological Society of America Bulletin 70, 115–205.CrossRefGoogle Scholar
Hutton, D. H. W. 1987. Strike-slip terranes and a model for the evolution of the British and Irish Caledonides. Geological Magazine 124, 405–25.Google Scholar
Hutton, D. H. W. & Dewey, J. F. 1986. Palaeozoic terrane accretion in the western Irish Caledonides. Tectonics 5, 1115–24.Google Scholar
Hutton, D. H. W. & McErlean, M. 1991. Silurian and Early Devonian sinistral deformation of the Ratagain granite, Scotland: constraints on the age of the Caledonian movement on the Great Glen fault system. Journal of the Geological Society, London 148, 1–4.CrossRefGoogle Scholar
Ixer, R. A. F., Pattrick, R. A. D. & Stanley, C. J. 1997. Geology, mineralogy and genesis of gold mineralization at Calliachar-Urlar Burn, Scotland. Transactions of the Institute of Mining and Metallurgy (Section B: Applied Earth Sciences) 106, B99–108.Google Scholar
Jacques, J. M. & Reavy, R. J. 1994. Caledonian plutonism and major lineaments in the SW Scottish Highlands. Journal of the Geological Society, London 151, 955–69.Google Scholar
Johnston, J. D. 1992. The fractal geometry of vein systems: the potential for ore reserve calculation. In The Irish Minerals Industry 1980–1990 (eds Bowden, A. A., Earls, G., O'Connor, P. G. & Pyne, J. F.), pp. 105–17. Irish Association for Economic Geology.Google Scholar
Johnston, J. D. & McCaffrey, K. J. W. 1996. Fractal geometries of vein systems and the variation of scaling relationships with mechanism. Journal of Structural Geology 18, 349–58.Google Scholar
Katz, Y., Weinberger, R. & Aydin, A. 2004. Geometry and kinematic evolution of Riedel shear structures, Capitol Reef National Park, Utah. Journal of Structural Geology 26, 491–501.Google Scholar
Kolb, J. & Hagemann, S. 2009. Structural control of low-sulfidation epithermal gold mineralization in the Rosario-Bunawan district, East Mindanao Ridge, Philippines. Mineralium Deposita 44, 795–815.Google Scholar
Kreuzer, O. P., Blenkinsop, T. G., Morrison, R. J. & Peters, S. G. 2007. Ore controls in the Charter Towers goldfield, N.E. Australia: constraints from geological, geophysical and numerical analyses. Ore Geology Reviews 32, 37–80.Google Scholar
Kynaston, H. & Hill, J. B. 1908. The Geology of the Country near Oban and Dalmally (Sheet 45). Memoir of the Geological Survey, Scotland.Google Scholar
Leake, B. E. 1990. Granite magmas: their sources, initiation and consequences of emplacement. Journal of the Geological Society, London 147, 579–89.Google Scholar
Leake, B. E. In press. A new map and interpretation of the geology of part of Joyces Country, Counties Galway and Mayo. Irish Journal of Earth Sciences.Google Scholar
Leake, B. E. & Tanner, P. W. G. 1994. The Geology of the Dalradian and Associated Rocks of Connemara, Western Ireland. Dublin: Royal Irish Academy, 96 pp.Google Scholar
Lowry, D., Boyce, A. J., Fallick, A. E. & Stephens, W. E. 1995. Genesis of porphyry and plutonic mineralisation systems in metaluminous granitoids of the Grampian Terrane, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences 85, 221–37.Google Scholar
Lusty, P. A., Naden, J., Bouch, J. J., McKervey, J. A. & McFarlane, J. A. 2011. Atypical gold mineralization in an orogenic setting–the Bohaun deposit, western Irish Caledonides. Economic Geology 106, 359–80.CrossRefGoogle Scholar
Mares, V. M. 1998. Structural development of the Soldiers Cap Group in the eastern fold belt of the Mt Isa Inlier: a succession of horizontal and vertical deformation events and large-scale shearing. Australian Journal of Earth Sciences 45, 373–87.Google Scholar
Mark, D., Rice, C. M., Fallick, A. E., Trewin, N. H., Lee, M. R., Boyce, A. & Lee, J. K. W. 2011. 40Ar/39Ar dating of hydrothermal activity, biota and gold mineralization in the Rhynie hot-spring system, Aberdeenshire, Scotland. Geochimica et Cosmochimica Acta 75, 555–69.CrossRefGoogle Scholar
Mark, D., Rice, C. M. & Trewin, N. H. 2013. Discussion on ‘A high-precision U–Pb age constraint on the Rhynie Chert Konservat-Lagerstätte: time scale and other implications’. Journal of the Geological Society, London 168, 863–72.Google Scholar
McFarlane, J. A. S., Cooper, M. R. & Chew, D. M. 2009. New geological and geophysical insights into the Dalradian Lack Inlier, Northern Ireland: implications for lithostratigraphy and gold mineralisation. In 2009 Irish Association for Economic Geology Annual Review, pp. 57–8.Google Scholar
Moody, J. D. & Hill, M. J. 1956. Wrench-fault tectonics. Bulletin of the Geological Society of America 67, 1207–46.CrossRefGoogle Scholar
Morris, J. H., Long, C. B., McConnell, B. & Archer, J. B. 1995. Geology of Connemara. An Introduction to the Physical Structure, Ancient Environments and Modern Landscapes of Parts of Northwest Galway and Southwest Mayo, to Accompany the Bedrock Geology 1:100,000 Scale Map Series. Sheet 10, Connemara. Dublin: Geological Survey of Ireland.Google Scholar
Mueller, A. G., Harris, L. B. & Lungan, A. 1988. Structural control of greenstone-hosted gold mineralization by transcurrent shearing: a new interpretation of the Kalgoorie mining district, western Australia. Ore Geology Reviews 3, 359–87.Google Scholar
Neilson, J. C., Kokelaar, B. P. & Crowley, Q. C. 2009. Timing, relations and cause of plutonic and volcanic activity of the Siluro-Devonian post-collision magmatic episode in the Grampian Terrane, Scotland. Journal of the Geological Society, London 166, 545–61.Google Scholar
Neumayr, P., Hagemann, S. G. & Couture, J.-F. 2000. Structural setting, textures, and timing of hydrothermal vein systems in the Val d'Or camp, Abitibi, Canada: implications for the evolution of transcrustal, second- and third-order fault zones and gold mineralization. Canadian Journal of Earth Sciences 37, 95–114.Google Scholar
Nixon, C. W., Sanderson, D. J. & Bull, J. M. 2011. Deformation within a strike-slip fault network at Westward Ho!, Devon U.K.: domino vs conjugate faulting. Journal of Structural Geology 33, 833–43.Google Scholar
Oliver, G. J. H. 2001. Reconstruction of the Grampian episode in Scotland: its place in the Caledonian Orogeny. Tectonophysics 332, 23–49.Google Scholar
Parker, R. T. G., Clifford, J. A. & Meldrum, A. H. 1989. The Cononish gold–silver deposit, Perthshire, Scotland. Transactions of the Institute of Mining and Mineralogy (Section B, Applied Earth Science) 98, B51–2.Google Scholar
Parker, R. & Pearson, N. 2012. Technical report on the Omagh gold project. Counties Tyrone and Fermanagh, Northern Ireland. ACA Howie International Limited, pp. 4–33.Google Scholar
Parnell, J., Earls, G., Wilkinson, J. J., Hutton, D. H. W., Boyce, A. J., Fallick, A. E., Ellam, R. M., Gleeson, S. A., Moles, N. R., Carey, P. F. & Legg, I. 2000. Regional fluid flow and gold mineralization in the Dalradian of the Sperrin Mountains, Northern Ireland. Economic Geology 95, 1389–416.Google Scholar
Parry, S. F., Noble, S. R., Crowley, Q. G. & Wellman, C. H. 2011. A high-precision U-Pb age constraint on the Rhynie Chert Konservat-Lagerstätte: time scale and other implications. Journal of the Geological Society, London 168, 863–72.Google Scholar
Pattrick, R. A. D. 1985. Pb-Zn and minor U mineralization at Tyndrum, Scotland. Mineralogical Magazine 49, 671–81.Google Scholar
Pattrick, R. A. D., Boyce, A. & MacIntyre, R. M. 1988. Gold-silver vein mineralization at Tyndrum, Scotland. Mineralogy and Petrology 38, 61–76.Google Scholar
Phillips, G. N. & Powell, R. 2010. Formation of gold deposits: a metamorphic devolatilization model. Journal of Metamorphic Geology 28, 689–718.Google Scholar
Pitcairn, I. K., Teagle, D. A. H., Craw, D., Olivo, G. R., Kerrich, R. & Brewer, T. S. 2006. Sources of metals and fluids in orogenic gold deposits: insights from the Otago and Alpine Schists, New Zealand. Economic Geology 101, 1525–46.Google Scholar
Rice, C. M., Ashcroft, W. A., Batten, D. J., Boyce, A. J., Caulfield, J. B. D., Fallick, A. E., Hole, M. J., Jones, E., Pearson, M. J., Rogers, G., Saxton, J. M., Stuart, F. M., Trewin, N. H. & Turner, G. 1995. A Devonian auriferous hot spring system. Rhynie, Scotland. Journal of the Geological Society, London 152, 229–50.Google Scholar
Rice, C. M., Mark, D. F., Selby, D. & Hill, N. J. 2013. Dating vein-hosted gold deposits in the Caledonides of N. Britain. In Mineral Deposits Studies Group, 36th Annual Winter Meeting, 2–4 January, 2013, Programme and Abstract Volume, p. 88.Google Scholar
Rice, C. M. & Trewin, N. H. 1988. A Lower Devonian gold-bearing hot spring system. Rhynie, Scotland. Transactions of the Institution of Mining and Metallurgy 97, B141–4.Google Scholar
Rice, C. M., Trewin, N. H. & Anderson, L. I. 2002. Geological setting of the Early Devonian Rhynie cherts, Aberdeenshire, Scotland: an early terrestrial hot spring system. Journal of the Geological Society, London 159, 203–14.Google Scholar
Riedel, W. 1929. Zur Mechanik geologischer Brucherscheinungen. Zentral blatt für Mineralogie Abteilung B, 354–68.Google Scholar
Rogers, G. & Dunning, G. R. 1991. Geochronology of appinitic and related granitic magmatism in the W Highlands of Scotland: constraints on the timing of transcurrent fault movement. Journal of the Geological Society, London 148, 17–27.Google Scholar
Rose, P. T. S. & Harris, A. L. 2000. Evidence for the Lower Palaeozoic age of the Tay Nappe: the timing and nature of Grampian events in the Scottish Highland sector of the Laurentian Margin. Journal of the Geological Society, London 157, 381–91.Google Scholar
Ryan, P. D. & Archer, J. B. 1980. The stratigraphy and petrochemistry of the Lough Nafooey Group (Tremadocian), western Ireland. Journal of the Geological Society, London 137, 443–58.CrossRefGoogle Scholar
Ryan, P. D. & Dewey, J. F. 2011. Arc-continent collisions in the Ordovician of western Ireland: stratigraphic, structural and metamorphic evolution. In Arc-Continent Collision (eds Brown, D. & Ryan, P. D.), pp. 373–401. Berlin, Heidelberg: Springer-Verlag.Google Scholar
Scotgold. 2007. Prospectus for Initial Public Offering on the Australian Stock Exchange. Scotgold Resources Limited, 97 pp.Google Scholar
Scotgold. 2012. ASX Announcement, March, 2012. Scotgold Resources Limited.Google Scholar
Secor, D. T. 1965. Role of fluid pressure in jointing. American Journal of Science 263, 633–46.Google Scholar
Sibson, R. H. 2000. A brittle failure mode plot defining conditions for high-flux flow. Economic Geology 95, 41–8.Google Scholar
Stephenson, D., Mendum, J. R., Fettes, D. J. & Leslie, A. G. 2013. The Dalradian rocks of Scotland: an introduction. Proceedings of the Geologists’ Association, 124, 3–82.Google Scholar
Tanner, P. W. G. 2007. Origin of the Tay Nappe, Scotland (abstract). In The Peach and Horne Meeting. Symposium on Continental Tectonics and Mountain Building, Ullapool, 2007.Google Scholar
Tanner, P. W. G. 2012. The giant quartz veins in the Tyndrum-Dalmally area, Grampian Highlands, Scotland: their geometry, origin, and relationship to the Cononish gold-silver deposit. Earth and Environmental Transactions of the Royal Society of Edinburgh 103, 51–76.Google Scholar
Tanner, P. W. G. 2013. A kinematic model for the Grampian Orogeny, Scotland. In New Perspectives on the Caledonides of Scandinavia and Related Areas (eds Corfu, F., Gasser, D. & Chew, D. M.). Geological Society of London, Special Publication no. 390. Published online 26 November 2013. doi: 10.1144/SP390.23.Google Scholar
Tanner, P. W. G., Bendall, C. A., Pickett, E. A., Roberts, J. L., Treagus, J. E. & Stephenson, D. 2013 a. The Dalradian rocks of the South-west Grampian Highlands of Scotland. Proceedings of the Geologists’ Association 124, 83–147.Google Scholar
Tanner, P. W. G. & Sutherland, S. 2007. The Highland Border Complex, Scotland: a paradox resolved. Journal of the Geological Society, London 164, 111–16.Google Scholar
Tanner, P. W. G. & Thomas, P. R. 2010. Major nappe-like D2 folds in the Dalradian rocks of the Beinn Udlaidh area, Central Highlands, Scotland. Earth and Environmental Transactions of the Royal Society of Edinburgh 100, 371–89.Google Scholar
Tanner, P. W. G., Thomas, C. W., Harris, A. L., Gould, D., Harte, B., Treagus, J. E. & Stephenson, D. 2013 b. The Dalradian rocks of the Highland Border region of Scotland. Proceedings of the Geologists’ Association 124, 215–62.Google Scholar
Tchalenko, J. 1970. Similarities between shear zones of different magnitudes. Geological Society of America Bulletin 81, 1625–39.Google Scholar
Treagus, J. E. 1991. Fault displacements in the Dalradian of the Central Highlands. Scottish Journal of Geology 27, 135–45.Google Scholar
Treagus, J. E. 2000. Solid Geology of the Schiehallion District: Memoir for 1:50 000 Geological Sheet 55W (Scotland). British Geological Survey.Google Scholar
Treagus, J. E., Pattrick, R. A. D. & Curtis, S. F. 1999. Movement and mineralization in the Tyndrum Fault Zone, Scotland and its regional significance. Journal of the Geological Society, London 156, 591–604.Google Scholar
Vearncombe, J. R. 1993. Quartz vein morphology and implications for formation depth and classification of Achaean gold-vein deposits. Ore Geology Reviews 8, 407–24.Google Scholar
Vearncombe, J. R. 1998. Shear zones, fault networks, and Archean gold. Geology 26, 855–8.Google Scholar
Vorhies, S. H. & Ague, J. J. 2011. Pressure–temperature evolution and thermal regimes in the Barrovian zones, Scotland. Journal of the Geological Society, London 168, 1147–66.Google Scholar
Watson, J. 1984. The ending of the Caledonian orogeny in Scotland. Journal of the Geological Society, London 141, 193–214.Google Scholar
Wilkinson, J. J., Boyce, A. J., Earls, G. & Fallick, A. E. 1999. Gold remobilization by low-temperature brines: evidence from the Curraghinalt gold deposit, Northern Ireland. Economic Geology 94, 289–96.Google Scholar
Wilkinson, J. J. & Johnston, J. D. 1996. Pressure fluctuations, phase separation, and gold precipitation during seismic fracture propagation. Geology 24, 395–8.Google Scholar
Wright, V., Woodcock, N. H. & Dickson, J. A. D. 2009. Fissure fills along faults: Variscan examples from Gower, South Wales. Geological Magazine 146, 890–902.Google Scholar
Yardley, B. W. D. & Cleverley, J. S. 2013. The role of metamorphic fluids in the formation of ore deposits. In Ore deposits in an Evolving Earth (eds Jenkin, G. R. T., Lusty, P. A. J., McDonald, I., Smith, M. P., Boyce, A. J. & Wilkinson, J. J.). Geological Society of London, Special Publication no. 393. Published online 7 October 2013. doi: 10.1144/SP393.5.Google Scholar
Zhou, J.–X. 1988. A gold and silver-bearing subvolcanic centre in the Scottish Caledonides near Lagalochan, Argyllshire. Journal of the Geological Society, London 145, 225–34.Google Scholar