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Kaolin polytype evidence for a hot-fluid pulse along Caledonian thrusts during rifting of the European Margin

  • J. Parnell (a1), G. Watt (a1), H. Chen (a1), H. Wycherley (a1), A. Boyce (a2), D. Elmore (a3), R. Blumstein (a3), M. Engel (a3) and P. Green (a4)...


Sedimentary basins developed along the European margin during the earliest, Permian, stage of proto-Atlantic rifting, during a phase of high heat flow. The proximity of some basins to Caledonian thrusts has implied that rifts locally utilized the basement fabric. New mineralogical and palaeomagnetic data show that thrust planes in the Moine Thrust Zone channelled a pulse of hot fluid in Permian time. The fluids precipitated kaolin in fractures in the thrust zone, and with decreasing intensity away from the zone. The high-temperature polytype dickite is largely confined to major thrust planes. Stable H and O isotope analyses indicate that the parent fluid included meteoric water involved in a hydrothermal system. Coeval hydrothermal hematite has a chemical remanence that dates the fluid pulse as Permian. This is direct evidence for post-orogenic activity in the thrust zone, in which the thrusts vented excess heat during regional crustal extension. The example from the European margin exemplifies the importance of deep-seated structures in the release of heat, and the value of kaolinite polytype mapping as a tool to record anomalous palaeo-heat flow.


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Bailey, S.W. (1980) Structure of layer silicates. Pp. 1–123 in: Crystal Structures of Clay Minerals and their X-ray Identification (Brindley, G.W. and Brown, G., editors). Monograph 5, Mineralogical Society, London.
Baron, M., Parnell, J. and Bordas Le Floch, N. (2003) Preservation of pre-orogenic palaeofluids within the Caledonides of northwest Scotland. Journal of Geochemical Exploration, 78–79, 27–31.
Beckinsale, R.D. and Obradovich, J.D. (1973) Potassium-argon ages for minerals from the Ross of Mull, Argyllshire, Scotland. Scottish Journal of Geology, 9, 115–147.
Bigeleisen, J., Perlman, M.L. and Prosser, H.C. (1952) Conversion of hydrogenic materials to hydrogen isotopic analysis. Analytical Chemistry, 24, 1356–1357.
Bray, R.J., Green, P.F. and Duddy, I.R. (1992) Thermal history reconstruction using apatite fission track analysis and vitrinite reflectance: a case study from the UK East Midlands and the southern North Sea. Pp. 3–25 in: Exploration Britain: Into the Next Decade (Hardman, R.F.P., editor). Special Publication, Geological Society of London.
Buatier, M.D., Trave, A., Labaume, P. and Potdevin, J.L. (1997) Dickite related to fluid-sediment interaction and deformation in Pyrenean thrust-fault zones. European Journal of Mineralogy, 9, 875–888.
Butler, C.A., Holdsworth, R.E. and Strachan, R.A. (1995) Evidence for Caledonian sinistral strike-slip motion and associated fault-zone weakening, Outer Hebrides FaultZone, NW Scotland. Journal of the Geological Society, London, 152, 743–746.
Cheadle, M.J., McGeary, S., Warner, M.R. and Matthews, D.H. (1987) Extensional structures on the western UK continental shelf: a review of evidence from deep seismic profiling. Pp. 445–465. in: Continental Extensional Tectonics (Coward, M.P., Dewey, J.F. and Hancock, P.L., editors). Special Publication, 28, Geological Society of London.
Clayton, R.N. and Mayeda, T.K. (1963) The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotopic analysis. Geochimica et Cosmochimica Acta, 27, 43–52.
Coward, M.P. (1982) Surge zones in the Moine thrust zone of NW Scotland. Journal of Structural Geology, 4, 247–256.
Ehrenberg, S.N., Aagaard, P., Wilson, M.J., Fraser, A.R. and Duthie, D.M.L. (1993) Depth-dependent transformations of kaolinite to dickite in sandstones of the Norwegian continental shelf. Clay Minerals, 28, 325–352.
Elmore, R.D., Blumestein, R., Engel, M. and Parnell, J. (2003) Paleomagnetic dating of fluid-flow events along the Moine Thrust Zone, Scotland. Journal of Geochemical Exploration, 78–79, 45–49.
Fallick, A.E., Macaulay, C.I. and Haszeldine, R.S. (1993) Implications of linearly correlated oxygen and hydrogen isotopic compositions for kaolinite and illite in the Magnus Sandstone. Clays and Clay Minerals, 41, 184–190.
Fisher, R.A. (1953) Dispersion on a sphere. Proceedings of the Royal Society of London, A217, 295–305.
Green, P.F., Duddy, I.R., Hegarty, K.A. and Bray, R.J. (1999) Early Tertiary heat flow along the UK Atlantic margin and adjacent areas. Pp. 349–357 in: Petroleum Geology of Northwest Europe: Proceedings of the 5th Conference (Fleet, A.J. and Boldy, S.A.R., editors). Geological Society, London.
Green, P.F., Duddy, I.R. and Hegarty, K.A. (2002) Quantifying exhumation from apatite fission-track analysis and vitrinite reflectance data: precision, accuracy and latest results from the Atlantic margin of NW Europe. Pp. 331–354 in: Exhumation of the North Atlantic Margin: Timing, Mechanisms and Implications for Petroleum Exploration (Doré, A.G., Cartwright, J.A., Stoker, M.S., Turner, J.P. and White, N., editors). Special Publication, 196, Geological Society, London.
Hall, A.J., Banks, D., Fallick, A.E. and Hamilton, P.J. (1989) A hydrothermal origin for copper-impregnated prehnite and analcime from Boylestone Quarry, Barrhead, Scotland. Journal of the Geological Society, London, 146, 701–713.
Hall, A.M. (1991) Pre-Quaternary landscape evolution in the Scottish Highlands. Transactions of the Royal Society of Edinburgh: Earth Sciences, 82, 1–26.
Hoffman, J. and Hower, J. (1979) Clay mineral assemblages as low grade metamorphic geothermometers: Application to the thrust faulted disturbed beltof Montana U.S.A. Pp. 55–79 in: Aspects of Diagenesis (Scholle, P.A. and Schuger, P.R., editors). SEPM, Tulsa, Oklahoma.
Jeans, C.V., Fallick, A.E., Fisher, M.J., Merriman, R.J., Corfield, R.M. and Manighetti, B. (1997) Clay- and zeolite-bearing Triassic sediments at Kaka Point, New Zealand: Evidence of microbially influenced mineral formation from earliest diagenesis into the lowestgrade of metamorphism. Clay Minerals, 32, 373–423.
Jenkin, G.R.T., Mohr, P., Mitchell, J.G. and Fallick, A.E. (1998) Carboniferous dykes as monitors of post-Caledonian fluid events in West Connacht, Ireland. Transactions of the Royal Society of Edinburgh: Earth Sciences, 89, 225–243.
Kelley, S.P. (1988) The relationship between K-Ar mineral ages, mica grain sizes and movementon the Moine Thrust Zone, NW Highlands, Scotland. Journal of the Geological Society, London, 145, 1–10.
Kelley, S.P. and Powell, D. (1985) Relationships between marginal thrusting and movement on major internal shear zones in the Northern Highland Caledonides, Scotland. Journal of Structural Geology, 7, 161–174.
Kennedy, B.M., Kharaka, Y.K. and Evans, W.C. (1997) Mantle fluids in the San Andreas Fault System, California. Science, 278, 1278–1281.
Kirschvink, J.L. (1980) The least-squares line and plane and the analysis of paleomagnetic data. Geophysical Journal of the Royal Astronomical Society, London, 62, 699–718.
Kirton, S.R. and Hitchen, K. (1987) Timing and style of crustal extension N of the Scottish mainland. Pp. 501–510 in: Continental Extensional Tectonics (Coward, M.P., Dewey, J.F. and Hancock, P.L., editors). Special Publication, 28, Geological Society of London.
Lewis, C.L.E., Carter, A. and Hurford, A.J. (1992) Lowtemperature effects of the Skye Tertiary intrusions on Mesozoic sediments in the Sea of Hebrides Basin. Pp. 175–188 in: Basins of the Atlantic Seaboard (Parnell, J., editor). Special Publication, 62, Geological Society of London.
Lidmar-Bergström, K. (1995) Relief and saprolites through time on the Baltic Shield. Geomorphology, 12, 45–61.
Lin, S.B. and Wang, Y.R. (1989) Mineralogy and tectonic implications of the dickites from Hengchun Peninsula, southern Taiwan. Acta Geologica Taiwanica, 27, 19–32.
Lundqvist, J. (1985) Deep-weathering in Sweden. Fennia, 163, 287–292.
MacGregor, M., Lee, G.W. and Wilson, G.V. (1920) The Iron Ores of Scotland. Geological Survey of Scotland Special Report on Mineral Resources, 11.
Middleton, D.W.J., Parnell, J., Green, P.F., Xu, G. and McSherry, M. (2001) Hotfluid flow events in Atlantic margin basins: An example from the Rathlin Basin. Pp. 91–105 in: Petroleum Exploration of Ireland's Offshore Basins (Shannon, P.M., Haughton, P.D.W. and Corcoran, D., editors). Special Publication, 188, Geological Society of London.
Parnell, J., Baron, M. and Boyce, A. (2000a) Controls on kaolinite and dickite distribution, Highland Boundary Fault Zone, Scotland and Northern Ireland. Journal of the Geological Society, London, 157, 635–640.
Parnell, J., Baron, M., Davidson, M., Elmore, D. and Engel, M. (2000b) Dolomitic breccia veins as evidence for extension and fluid flow in the Dalradian of Argyll. Geological Magazine, 137, 447–462.
Potts, G.J. (1990) A palaeomagnetic study of recumbently folded and thermally metamorphosed Torridon Group sediments, Eishort anticline, Skye, Scotland. Journal of the Geological Society, London, 147, 999–1007.
Quattrocchi, F., Favara, R., Capasso, G., Pizzino, L., Bencini, R., Cinti, D., Galli, G., Grassa, F., Francofonte, S. and Volpicielli, G. (2002) Thermal anomalies and fluid geochemistry framework in occurrence of the 2000–2001 Nizza-Monferra area seismic sequence (northern Italy): Episodic changes in the fault zone heat flow or chemical mixing phenomena?
Roberts, D.G., Thompson, M., Mitchener, B., Hossack, J., Carmichael, S. and Bjørnseth, H.-M. (1999) Palaeozoic to Tertiary rift and basin dynamics: mid-Norway to the Bay of Biscay – a new context for hydrocarbon prospectivity in the deep water frontier. Pp. p. 7–40 in: Petroleum Geology of Northwest Europe. Proceedings of the 5th Conference (Fleetand, A.J. Boldy, S.A.R, editors). Geological Society, London.
Rock, N.M.S. (1982) Petrography and age of agglomeratic vents near Toscaig, Applecross, Scotland. Proceedings of the Geologists’ Association, 93, 305–308.
Rock, N.M.S. (1983) The Permo-Carboniferous camptonite- monchiquite dyke-suite of the Scottish Highlands and Islands: distribution, field and petrological aspects. Report of the Institute of Geological Sciences, No. 82/14.
Ruiz Cruz, M.D. and Andreo, B. (1996) Genesis and transformation of dickite in Permo-Triassic sediments (Betic Cordilleras, Spain). Clay Minerals, 31, 133–152.
Savin, S.M. and Lee, M. (1988) Isotopic studies of phyllosilicates. Pp. 189–223 in: Hydrous Phyllosilicates (Bailey, S.W., editor). Mineralogical Society of America, Washington.
Shepherd, T.J., Rankin, A.H. and Alderton, D.H. (1985) A Practical Guide to Fluid Inclusion Studies. Blackie, Glasgow, UK.
Sheppard, S.M.F. and Gilg, H.A. (1996) Stable isotope geochemistry of clay minerals. Clay Minerals, 31, 1–24.
Smythe, D.K., Russell, M.J. and Skuce, A.G. (1995) Intra-continental rifting inferred from the major late Carboniferous quartz-dolerite dyke swarm of NW Europe. Scottish Journal of Geology, 31, 151–162.
Snyder, D.B. (1990) The Moine Thrustin the BIRPS data set. Journal of the Geological Society, London, 147, 81–86.
Snyder, D.B., England, R.W. and McBride, J.H. (1997) Linkage between mantle and crustal structures and its bearing on inherited structures in northwestern Scotland. Journal of the Geological Society, London, 154, 79–83.
Söderman, G. (1985) Planation and weathering in eastern Fennoscandia. Fennia, 163, 347–352.
Speight, J.M., Skelhorn, R.R., Sloat, T. and Knapp, R.J. (1982) The dyke swarms of Scotland. Pp. 449–459 in: Igneous Rocks of the British Isles (Sutherland, D.S., editor). John Wiley, Chichester, UK.
Srivastav, S.K., Dangwal, M., Bhattacharya, A. and Reddy, P.R. (1997) Satellite data reveals preearthquake thermal anomalies in Killari area, Maharashtra. Current Science, 72, 880–884.
Thomson, K., Underhill, J.R., Green, P.F., Bray, R.J. and Gibson, H.J. (1999) Evidence from apatite fission track analysis for the post-Devonian burial and exhumation history of the northern Highlands, Scotland. Marine and Petroleum Geology, 16, 27–39.
Tronin, A.A. (1996) Satellite thermal survey – a new tool for the study of seismoactive regions. International Journal of Remote Sensing, 17, 1439–1455.
Walderhaug, O. (1996) Kinetic modelling of quartz cementation and porosity loss in deeply buried sandstone reservoirs. American Association of Petroleum Geologists Bulletin, 80, 731–745.
Watson, J.V. (1984) The ending of the Caledonian orogeny in Scotland. Journal of the Geological Society, London, 141, 193–214.
Watts, N.L. (1976) Paleopedogenic palygorskite from the basal Permo-Triassic of northwest Scotland. American Mineralogist, 61, 299–302.
Woodhall, D. and Knox, R.W.O’B. (1979) Mesozoic volcanism in the northern North Sea and adjacent areas. Bulletin of the Geological Survey of Great Britain, 70, 34–56.
Woods, S., Elmore, R.D. and Engel, M. (2002) Paleomagnetic dating of smectite-to-illite conversion: testing the hypothesis in Jurassic sedimentary rocks, Skye, Scotland. Journal of Geophysical Research, 107, 10.1029/2000JB000053, EPM 2-1-2-12.
Xie, X., Li, S., Dong, W. and Hu, Z. (2001) Evidence for episodic expulsion of hotfluids along faults near diapiric structures of the Yinggehai Basin, South China Sea. Marine and Petroleum Geology, 18, 715–728.
Zijderveld, J.D.A. (1967) A.C. demagnetization of rocks: Analysis of results. Pp. 254–286 in: Methods in Palaeomagnetism. (Collinson, D.W., Creer, K.M. and Runcorn, S.K., editors). Elsevier, Amsterdam, The Netherlands.



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