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Mineralogical controls on metal distribution in stream sediment derived from the Caledonides of the Scottish Southern Uplands and English Lake District

Published online by Cambridge University Press:  05 July 2018

P. Stone ,
N. Breward  and
R. J. Merriman
P. Stone*
Affiliation:
British Geological Survey, Murchison House, West Mains Road, Edinburgh EH9 3LA, UK
N. Breward
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
R. J. Merriman
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
*
E-mail: psto@bgs.ac.uk
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Abstract

Stream sediment geochemistry provides an innovative method of assessing the basinal history of the Caledonian slate belts. Despite glaciation, the stream sediment geochemical patterns spatially mimic the outcrop of underlying bedrock lithologies. However, erosion from rock to sediment by fluvial processes may either increase or reduce an element’s abundance depending on the nature of its mineral host. An element held in heavy, resistate minerals will be concentrated, whereas one residing in unstable ferromagnesian minerals, which readily break down to clays during weathering, may be preferentially removed. Examples are provided from the Cr-Ni-V-Mg, base metal and Rb-Sr element suites. Primary and secondary bedrock patterns are recognized in the stream sediments. Primary patterns follow the original composition of the source bedrock, with steep gradients in the element distribution coinciding with lithostratigraphical boundaries. Such patterns also reveal subtle divisions within the established geological units for which the main compositional control was the nature of the ancient sedimentary provenance. Secondary patterns reflect remobilization of elements within the bedrock and so may cut across lithostratigraphical boundaries. These patterns (or their absence) are influenced by the thermal histories of the Caledonian basins, and so are indicative of the geotectonic regime in which the sedimentary sequences were originally deposited.

Keywords

stream sediment geochemistryCaledonian geologySouthern UplandsScotlandLake DistrictEnglandsedimentary provenancebasin thermal history.
Type
Research Article
Information
Mineralogical Magazine , Volume 67 , Issue 2 , April 2003 , pp. 325 - 338
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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References

Armstrong, H.A., Owen, A.W., Scrutton, C.T., Clarkson, E.N.K. and Taylor, M. (1996) Evolution of the Northern Belt, Southern Uplands: implications for the Southern Uplands controversy. Journal of the Geological Society, London, 153, 197—205.CrossRefGoogle Scholar
Bhatia, M.R. (1983) Plate tectonics and geochemical composition of sandstones. Geological Journal, 91, 611—643.Google Scholar
Bhatia, M.R. and Crook, A.W. (1986) Trace element characteristics of greywackes and tectonic setting discrimination of sedimentary basins. Contributions to Mineralogy and Petrology, 92, 181—193.CrossRefGoogle Scholar
British Geological Survey (1992) Regional Geochemistry of the Lake District and Adjacent Areas. British Geological Survey, Keyworth, Nottingham, UK.Google Scholar
British Geological Survey (1993) Regional Geochemistry of Southern Scotland and Part of Northern England. British Geological Survey, Keyworth, Nottingham.Google Scholar
Cooper, A.H., Rushton, A.W.A., Molyneux, S.G., Hughes, R.A., Moore, R.M. and Webb, B.C. (1995) The stratigraphy, correlation, provenance and palaeo- geography of the Skiddaw Group (Ordovician) in the English Lake District. Geological Magazine, 132, 185—211.CrossRefGoogle Scholar
Cooper, D.C., Lee, M.K., Fortey, N.J., Cooper, A.H., Rundle, C.C., Webb, B.C. and Allen, P.M. (1988) The Crummock Water aureole: a zone of metasomatism and source of ore metals in the English Lake District. Journal of the Geological Society, London, 145, 523—540.CrossRefGoogle Scholar
Cox, R. and Lowe, D.R. (1995) A conceptual review of regional-scale controls on the composition of clastic sediment and the co-evolution of continental blocks and their sedimentary cover. Journal of Sedimentary Research , A65, 1—12.Google ScholarPubMed
Duller, P.R. and Floyd, J.D. (1995) Turbidite geochemistry and provenance studies in the Southern Uplands of Scotland. Geological Magazine, 132, 557—569.CrossRefGoogle Scholar
Floyd, J.D. (1996) Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, 86, 153—165.CrossRefGoogle Scholar
Floyd, J.D. and Trench, A. (1989) Magnetic susceptibility contrasts in Ordovician greywackes of the Southern Uplands of Scotland. Journal of the Geological Society, London. 146, 77—83.CrossRefGoogle Scholar
Fortey, N.J., Roberts, B. and Hirons, S.R. (1993) Relationship between metamorphism and structure in the Skiddaw Group, English Lake District. Geological Magazine, 130, 631—638.CrossRefGoogle Scholar
Garver, J.I., Royce, P.R. and Smick, T.A. (1996) Chromium and nickel in shale of the Taconic foreland: a case study for the provenance of finegrained sediments with an ultramafic source. Journal ofSedimentary Research , 66, 100–106.Google Scholar
Kneller, B.C. (1990) The Ludlow rocks of Sheet 38 (Ambleside). British Geological Survey Technical Report WA/90/62.Google Scholar
Kneller, B.C. (1991) A foreland basin on the southern margin of Iapetus. Journal of the Geological Society, London, 148, 207—210.CrossRefGoogle Scholar
Kneller, B.C., King, L.M. and Bell, A.M. (1993) Foreland basin development and tectonics on the northwest margin of eastern Avalonia. Geological Magazine, 130, 691—697.CrossRefGoogle Scholar
Leggett, J.K. (1987) The Southern Uplands as an accretionary prism: the importance of analogues in reconstructing palaeogeography. Journal of the Geological Society, London, 144, 737—752.CrossRefGoogle Scholar
Leggett, J.K., McKerrow, W.S. and Eales, M.H. (1979) The Southern Uplands of Scotland: a Lower Palaeozoic accretionary prism. Journal of the Geological Society, London, 136, 755—770.CrossRefGoogle Scholar
McCaffrey, W.D. (1991) Silurian turbidite provenance in NW England. PhD thesis, University of Leeds (unpublished), UK.Google Scholar
McCaffrey, W.D. and Kneller, B.C. (1996) Silurian turbidite provenance on the northern Avalonian margin. Journal of the Geological Society, London, 153, 437—450.CrossRefGoogle Scholar
Merriman, R.J. and Frey, M. (1999) Patterns of very low-grade metamorphism in metapelitic rocks. Pp. 61—107 in: Low-Grade Metamorphism (Frey, M. and Robinson, D., editors). Blackwell Science, Oxford, UK.Google Scholar
Merriman, R.J. and Roberts, B. (2001) Low-grade metamorphism in the Scottish Southern Uplands terrane: deciphering the patterns of accretionary burial, shearing and cryptic aureoles. Transactions of the Royal Society of Edinburgh: Earth Sciences, 91, 521—537.CrossRefGoogle Scholar
Moore, D.M. and Reynolds, R.C., Jr. (1997) X-ray Diffraction and Identification of Clay Minerals. Oxford University Press, UK, 378 pp.Google Scholar
Nesbitt, H.W., Young, G.M., McLennan, S.M. and Keays, R.R. (1996) Effects of chemical weathering and sorting on the petrogenesis of siliciclastic sediments, with implications for provenance studies. Journal of Geology, 104, 525—542.CrossRefGoogle Scholar
Plant, J.A., Breward, N., Simpson, P.R. and Slater, D. (1990) Regional geochemistry and the identification of metallogenic provinces: examples from lead-zinc- barium, tin-uranium and gold deposits. Journal of Geochemical Exploration, 39, 195—224.CrossRefGoogle Scholar
Plant, J.A., Stone, P. and Mendum, J.R. (1999) Regional geochemistry, terrane analysis and metallogeny in the British Caledonides. Pp. 109—126 in: Continental Tectonics (Ryan, P.D. and MacNiocaill, C., editors). Special Publication, 164. Geological Society, London.Google Scholar
Rock, N.M.S. (1988) Summary statistics in geochemistry: a study of the performance of robust estimates. Mathematical Geology, 20, 243—275.CrossRefGoogle Scholar
Rushton, A.W.A., Stone, P. and Hughes, R.A. (1996) Biostratigraphical control of thrust models for the Southern Uplands of Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, 86, 137—152.CrossRefGoogle Scholar
Stone, P., Floyd, J.D., Barnes, R.P. and Lintern, B.C. (1987) A sequential back-arc and foreland basin thrust duplex model for the Southern Uplands of Scotland. Journal of the Geological Society, London, 144, 753—764.CrossRefGoogle Scholar
Stone, P., Green, P.M., Lintern, B.C., Plant, J.A., Simpson, P.R. and Breward, N. (1991) Geochemistry characterises provenance in southern Scotland. Geology Today, 7, 177—181.CrossRefGoogle Scholar
Stone, P., Green, P.M., Lintern, B.C., Simpson, P.R. and Plant, J.A. (1993) Regional geochemical variation across the Iapetus Suture zone: tectonic implications. Scottish Journal of Geology, 29, 113—121.CrossRefGoogle Scholar
Stone, P., Cook, J.M., McDermott, C., Robinson, J.J. and Simpson, P.R. (1995) Lithostratigraphical and structural controls on distribution of As and Au in southwest Southern Uplands, Scotland. Transactions of the Institution of Mining and Metallurgy , 104, B111–B119.Google Scholar
Stone, P., Green, P.M. and Williams, T.M. (1997) Relationship of source and drainage geochemistry in the British paratectonic Caledonides: an exploratory regional assessment. Transactions of the Institution of Mining and Metallurgy , 106, B79–B84.Google Scholar
Stone, P., Cooper, A.H. and Evans, J.A. (1999a) The Skiddaw Group (English Lake District) reviewed: early Palaeozoic sedimentation and tectonism at the northern margin of Avalonia. Pp. 325—336 in: In Sight of the Suture: the Geology of the Isle of Man in its Iapetus Ocean Context (Woodcock, N.H., Fitches, W.R., Quirk, D.G. and Barnes, R.P., editors). Special Publication, 160. Geological Society, London.Google Scholar
Stone, P., Plant, J.A., Mendum, J.R. and Green, P. (1999b)) A regional geochemical assessment of some terrane relationships in the British Caledonides. Scottish Journal of Geology, 35, 145—156.CrossRefGoogle Scholar
Styles, M.T., Perez-Alvarez, M. and Floyd, J.D. (1995) Pyroxenous greywackes in the Southern Uplands of Scotland and their petrotectonic implications. Geological Magazine, 132, 539—547.CrossRefGoogle Scholar