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Late Mississippian limestone sedimentary environment in southern Pembrokeshire (Bullslaughter Bay, Wales): evidence of meteoric diagenesis and hypersaline features

Published online by Cambridge University Press:  09 September 2020

Yvonne Battiau-Queney Open the ORCID record for Yvonne Battiau-Queney [Opens in a new window] ,
Alain Préat Open the ORCID record for Alain Préat [Opens in a new window] ,
Alain Trentesaux ,
Philippe Recourt  and
Viviane Bout-Roumazeilles
Yvonne Battiau-Queney*
Affiliation:
Université de Lille, CNRS, Université Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-59000 Lille, France
Alain Préat
Affiliation:
Université Libre de Bruxelles, Research Group ‘Biogeochemistry & Modelling of the Earth System’, B-1050, Brussels, Belgium
Alain Trentesaux
Affiliation:
Université de Lille, CNRS, Université Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-59000 Lille, France
Philippe Recourt
Affiliation:
Université de Lille, CNRS, Université Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-59000 Lille, France
Viviane Bout-Roumazeilles
Affiliation:
Université de Lille, CNRS, Université Littoral Côte d’Opale, UMR 8187, LOG, Laboratoire d’Océanologie et de Géosciences, F-59000 Lille, France
*
Author for correspondence: Yvonne Battiau-Queney, Email: yvonne.battiau@orange.fr
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Abstract

Bullslaughter Bay in southern Pembrokeshire, UK, exposes sections of Upper Mississippian limestone strata. In many places, the rock suffered an isovolumetric alteration during a period of sea-level oscillations. We used multiple approaches to study the weathered rocks, combining sedimentological, petrographic and isotopic compositions (δ18O and δ13C values). Two main microfacies are recognized: (i) packstones/grainstones, characteristic of an open marine shallow subtidal/intertidal environment, with a high degree of agitation, slightly elevated salinity and temporary subaerial exposure; and (ii) mudstones/wackestones in a lagoonal setting and intertidal or supratidal environments, with a pedogenetic influence. In both cases, a complex diagenetic story, which started early in a meteoric environment, induced a strong alteration producing loose sediments in place of the parent rock. Calcretization, at or near the sediment surface in the vadose zone, was one of the most widespread diagenetic modes. It could be associated with beachrocks. Carbon and oxygen stable isotope analyses from more or less weathered limestones support the petrographic data: they show non-marine values with δ13C ranges of from −2.13 ‰ to 1.75 ‰ and δ18O from −6.05 ‰ to −4.66 ‰. These values are systematically lower than those of the middle Carboniferous seawater. Some periods of low sea level and subaerial exposure allowed gypsum to form. Neoformation of euhedral quartz by probable replacement after sulfate, and halite pseudomorphs after gypsum in a hypersaline environment are documented for the first time in southern Pembrokeshire. The studied weathered limestones present a complex diagenetic evolution related to sea-level oscillations in a range of hot and contrasting seasonal climates.

Keywords

coastal sedimentationglacio-eustasyoxygen and carbon isotopessparmicritizationcalcreteevaporite minerals
Type
Original Article
Information
Geological Magazine , Volume 158 , Issue 5 , May 2021 , pp. 759 - 786
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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References

Albright, J L and Lueth, VW (2003) Pecos diamonds–quartz and dolomite crystals from the Seven Rivers Formation outcrops of southeastern New Mexico. New Mexico Geology 25, 63–72.Google Scholar
Allan, JR and Matthews, RK (1982) Isotope signatures associated with early meteoric diagenesis. Sedimentology 29, 797–817.CrossRefGoogle Scholar
Armenteros, I (2010) Diagenesis of carbonates in continental settings. In Carbonates in Continental Settings, Geochemistry, Diagenesis and Applications (eds Alonso-Zarza, AM and Tanner, LH), pp. 61–151. Developments in Sedimentology Vol. 62. Amsterdam: Elsevier.CrossRefGoogle Scholar
Battiau-Queney, Y (1980) Contribution à l’étude géomorphologique du Massif Gallois (G.B.). Thèse Doctorat ès Lettres, Honoré Champion, Paris, 798 pp. Published thesis.Google Scholar
Battiau-Queney, Y (1984) The pre-glacial evolution of Wales. Earth Surface Processes and Landforms 9, 229–52.CrossRefGoogle Scholar
Bibi, I, Singh, B and Sivester, E (2011) Akaganéite (β-FeOOH) precipitation in inland acid sulfate soils of south-western New South Wales (NSW), Australia. Geochimica et Cosmochimica Acta 75, 6429–38.CrossRefGoogle Scholar
Błażejowski, B and Walsh, PT (2013) A Visean (Brigantian) conodont assemblage preserved in the dissolution residue of a breccia matrix at Bullslaughter Bay, Pembrokeshire, South Wales. Neues Jahrbuch für Geologie und Paläontologie 267, 239–54.CrossRefGoogle Scholar
British Geological Survey (1977) Geological Map of Pembroke and Linney Head. 1:50,000 Series. Keyworth: British Geological Survey.Google Scholar
British Geological Survey (1996) Tectonic Map of Britain, Ireland, and Adjacent Areas. Keyworth: British Geological Survey.Google Scholar
Carew, JL and Mylroie, JE (1997) Geology of the Bahamas. In Geology and Hydrogeology of Carbonate Islands (eds Vacher, HL and Quinn, T), pp. 91–139. Developments in Sedimentology Vol. 54. Amsterdam: Elsevier.Google Scholar
Davies, JR (1984) Sedimentary cyclicity in the late Asbian and early Brigantian (Dinantian) limestones of the Anglesey and Llandudno district, North Wales. Proceedings of the Geologists’ Association 95, 392–3.Google Scholar
Davies, JR (1991) Karstification and pedogenesis on a late Dinantian carbonate platform, Anglesey, North Wales. Proceedings of the Yorkshire Geological Society 48, 297–321.Google Scholar
Davies, S (2008) The record of Carboniferous sea level change in low latitude sedimentary successions from Britain and Ireland during the onset of the Late Palaeozoic ice age. In Resolving the Late Palaeozoic Ice Age in Time and Space (eds Fielding, CR, Frank, TD and Isabell, JL), pp. 187–204. Geological Society of America, Special Paper no. 441.CrossRefGoogle Scholar
Dixon, EEL (1921) The Geology of the South Wales Coalfield, Part XIII: The Country Around Pembroke and Tenby. Memoirs of the Geological Survey of Great Britain. London: HMSO Google Scholar
Dunning, FW (1992) Structure. In Geology of England and Wales (eds Duff, PMcLD and Smith, AJ), pp. 523–61. London, Bath: The Geological Society of London.Google Scholar
Falcon-Lang, HJ (1999) The Early Carboniferous (Asbian–Brigantian) seasonal tropical climate of northern Britain. Palaios 14, 116–26.CrossRefGoogle Scholar
Fielding, CR, Frank, TD and Isbell, JL (2008) The late Palaeozoic ice age – a review of current understanding and synthesis of global climate patterns. In Resolving the Late Paleozoic Ice Age in Time and Space (edsFielding, CR, Frank, TD andIsbell, JL), pp. 343–54. Geological Society of America, Special Paper no. 441.Google Scholar
Flügel, E (2004) Microfacies of Carbonate Rocks: Analysis, Interpretation and Application. Berlin: Springer Verlag, 976 pp.CrossRefGoogle Scholar
Friedman, GM and Shukla, V (1980) Significance of authigenic quartz euhedra after sulfates: example from the Lockport Formation (Middle Silurian) of New York. Journal of Sedimentary Geology 50, 1299–304.Google Scholar
George, TN (1958) Lower Carboniferous palaeogeography of the British Isles. Proceedings of the Yorkshire Geological Society 31, 227–318.CrossRefGoogle Scholar
George, TN (1970) South Wales: British Regional Geology. London: HMSO, 152 pp.Google Scholar
George, TN (1974) Lower Carboniferous rocks in Wales. In The Upper Palaeozoic and Post-Palaeozoic Rocks of Wales (ed. Owen, TR), pp. 85–115. Cardiff: University of Wales Press.Google Scholar
George, TN (1979) Eustasy and tectonics: sedimentary rhythms and stratigraphical units in British Dinantian correlation. Proceedings of the Yorkshire Geological Society 42, 229–62.CrossRefGoogle Scholar
George, GT (2008) The Geology of South Wales: A Field Guide. Bearsted: Published Privately (GT George).Google Scholar
George, TN, Johnson, GAL, Mitchell, M, Prentice, JE, Ramsbottom, WHC, Sevastopulo, GD and Wilson, RB (1976) A Correlation of Dinantian Rocks in the British Isles. Geological Society of London, Special Report no. 7, 87 pp.Google Scholar
Grimm, WD (1962) Idiomorphe quarze als leitmineralien fur salinare fazies. Erdöl Kohle 15, 880–7.Google Scholar
Grossman, EL, Yancey, TE, Jones, TE, Bruckschen, P, Chuvashov, B, Mazzullo, SJ and Mii, HS (2008) Glaciation, aridification, and carbon sequestration in the Permo-Carboniferous: the isotopic record from low latitudes? Palaeogeography, Palaeoclimatology, Palaeoecology 268, 222–33.CrossRefGoogle Scholar
Gundu Rao, C (1986) Authigenic quartz and vanished evaporitic nodules in Krol D unit of Garhwal lesser Himalaya: further evidence of an extinct hypersaline environment. Current Science 57, 856–7.Google Scholar
Hardie, LA (1977) Sedimentation on the Modern Carbonate Tidal Flats of Northwest Andros Island, Bahamas. The John Hopkins University Studies in Geology 22. Baltimore: Johns Hopkins University Press, 202 pp.Google Scholar
Horbury, AD (1989) The relative roles of tectonism and eustasy in the deposition of the Urswick Limestone in south Cumbria and north Lancashire. In The Role of Tectonics in Devonian and Carboniferous Sedimentation in the British Isles (eds Arthurton, RS, Guteridge, P and Nolan, SC), pp. 153–69. Occasional Publication of the Yorkshire Geological Society no. 6.Google Scholar
Hovorka, S (1992) Halite pseudomorphs after gypsum in bedded anhydrite – clue to gypsum-anhydrite relationships. Journal of Sedimentary Petrology 62, 1098–111.Google Scholar
Isbell, JL, Miller, MF, Wolfe, KL and Lenaker, PA (2003) Timing of late Palaeozoic glaciation in Gondwana: was glaciation responsible for the development of Northern Hemisphere cyclothems? In Extreme Depositional Environments: Mega End Members in Geologic Time (edsChan, MA and Archer, AW), pp. 5–24. Geological Society of America, Special Paper no. 370.Google Scholar
James, NP and Choquette, PW (1990) Limestones – the meteoric diagenetic environment. In Diagenesis (eds Mclleath, IA and Morrow, DW), pp. 35–74. Geoscience Canada, Reprint Series 4. Ottawa: Geological Association of Canada.Google Scholar
Jones, DJ (1974) The Namurian series in South Wales. In The Upper Palaeozoic and Post-Palaeozoic Rocks of Wales (ed. Owen, R), pp. 117–32. Cardiff: University of Wales Press.Google Scholar
Kahle, CF (1977) Origin of subaerial Holocene calcareous crusts: role of algae, fungi and sparmicritization. Sedimentology 24, 413–35.CrossRefGoogle Scholar
Kelling, G (1974) Upper Carboniferous sedimentation in South Wales. In The Upper Palaeozoic and Post-Palaeozoic Rocks of Wales (ed. Owen, R), pp. 185–224. Cardiff: University of Wales Press.Google Scholar
Kelling, G and Collinson, JD (1992) Silesian. In Geology of England and Wales (eds Duff, PMcLD and Smith, AJ), pp. 239–73. London, Bath: The Geological Society of London.Google Scholar
Knauth, LP and Kennedy, MJ (2009) The Late Precambrian greening of the Earth. Nature 460, 728–32.CrossRefGoogle Scholar
Krinsley, DH and Doornkamp, JC (1973) Atlas of Quartz Sand Surface Textures. Cambridge: Cambridge University Press, 91 pp.Google Scholar
Land, LS (1989) Introduction to diagenesis in the meteoric environment. In Carbonate Diagenesis and Porosity (ed. Moore, CH), pp. 161–75. New York: Elsevier Science.Google Scholar
Leeder, MR (1992) Dinantian. In Geology of England and Wales (eds Duff, PMcLD and Smith, AJ), pp. 207–38. London, Bath: The Geological Society of London.Google Scholar
Le Ribault, L (1975) L’exoscopie des Quartz. Paris: Masson, 150 pp.Google Scholar
Leveridge, BE and Hartley, AJ (2006) The Variscan Orogeny: the development and deformation of Devonian/Carboniferous basins in SW England and South Wales. In The Geology of England and Wales (eds Brenchley, PJ and Rawson, PF), pp. 225–55. London: Geological Society of London.CrossRefGoogle Scholar
Logan, BW (1987) The MacLeod Evaporite Basin, Western Australia. American Association of Petroleum Geologists, Memoir no. 44, 140 pp.Google Scholar
Lohmann, KC (1982) Inverted J carbon and oxygen isotopic trends criteria for shallow meteoric phreatic diagenesis. Geological Society of America, Abstracts with Program, 548.Google Scholar
Lohmann, KC (1988) Geochemical patterns of meteoric diagenetic system and their application to studies of palaeokarst. In Paleokarsts (eds James, NP and Choquette, PW), pp. 58–80. New York: Springer Verlag.CrossRefGoogle Scholar
Mii, HS, Grossman, EL and Yancey, TE (1999) Carboniferous isotope stratigraphies of North America: implications for Carboniferous paleoceanography and Mississippian glaciation. Geological Society of America Bulletin 111, 960–73.2.3.CO;2>CrossRefGoogle Scholar
Moore, CHS (1989) Carbonate Diagenesis and Porosity. Developments in Sedimentology Vol. 46. Amsterdam: Elsevier, 338 pp.Google Scholar
Owen, TR (1974) The Variscan orogeny in Wales. In The Upper Palaeozoic and Post-Palaeozoic rocks of Wales (ed Owen, TR), pp. 285–94. Cardiff: University of Wales Press.Google Scholar
Paszkowski, M and Szydłak, T (1986) Evidence of hypersaline sedimentary environment in Dinantian carbonate deposits in area of Krzeszowice near Kraków. Annales Societatis Geologorum Poloniae 56, 385–97.Google Scholar
Quinif, Y (2010) Fantômes de Roche et Fantômisation – Essai sur un Nouveau Paradigme en Karstogenèse. Karstologia Mémoires 18, 184 pp.Google Scholar
Ramsbottom, WHC (1973) Transgressions and regressions in the Dinantian: a new synthesis of British Dinantian stratigraphy. Proceedings of the Yorkshire Geological Society 39, 567–607.CrossRefGoogle Scholar
Ramsbottom, WHC (1977) Major cycles of transgression and regression (mesothems) in the Namurian. Proceedings of the Yorkshire Geological Society 41, 261–91.CrossRefGoogle Scholar
Rasmussen, KA and Neumann, AC (1988) Holocene overprints of Pleistocene paleokarsts: Bight of Abaco, Bahamas. In Paleokarsts (eds James, NP and Choquette, PW), pp. 133–48. New York: Springer Verlag.Google Scholar
Rasmussen, K and Neumann, AC (1990) Carbonate sequence development and the taphonomy of sub-karstic basin; Bight of Abaco, Bahamas. In 13th International Sedimentology Congress, Nottingham, England, 26–31 August 1990. Abstract Volume, pp. 449–50.Google Scholar
Rowberry, MD, Battiau-Queney, Y, Walsh, PT, Błażejowski, B, Bout-Roumazeilles, V, Trentesaux, A, Křížová, L and Griffiths, H (2014) The weathered Carboniferous limestone at Bullslaughter Bay, South Wales: the first example of ghost-rock recorded in the British Isles. Geologica Belgica 17, 33–42.Google Scholar
Rygel, M, Fielding, C, Frank, T and Birgenheier, L (2008) The magnitude of late Paleozoic glacioeustatic fluctuations: a synthesis. Journal of Sedimentary Research 78, 500–11.CrossRefGoogle Scholar
Sadio, S (1991) Pédogenèse et Potentialités Forestières des Sols Sulfatés Acides Salés des Tannes du Sine Saloum, Sénégal. Paris: ORSTOM, 270 pp.Google Scholar
Saltzman, MR and Thomas, E (2012) Carbon isotope stratigraphy. In The Geologic Time Scale, Vol. 1 (eds Gradstein, FM, Ogg, JG, Schmitz, MD and Ogg, GM), pp. 207–32. Amsterdam: Elsevier.CrossRefGoogle Scholar
Sanz, A, Garcia-González, MT, Vizcayno, C and Rodriguez, R (1996) Iron-manganese nodules in a semi-arid environment. Australian Journal of Soil Research 34, 623–34.CrossRefGoogle Scholar
Schreiber, BC and El-Tabakh, M (2010) Deposition and early alteration of evaporites. Sedimentology 47, 215–38.CrossRefGoogle Scholar
Schreiber, BC and Walker, D (1992) Halite pseudomorphs after gypsum: a suggested mechanism, Journal of Sedimentary Petrology 62, 61–70.Google Scholar
Sial, AN, Gaucher, C, Ferreira, VP, Pereira, NS, Cezario, WS, Chiglino, L and Lima, HM (2015) Isotope and elemental chemostratigraphy. In Chemostratigraphy: Concepts, Techniques, and Applications (ed. Ramkumar, M), pp. 23–64. Amsterdam: Elsevier.CrossRefGoogle Scholar
Smith, L and Read, J (2000) Rapid onset of late Paleozoic glaciation on Gondwana. Geology 28, 279–82.2.0.CO;2>CrossRefGoogle Scholar
Somerville, ID (1979) A cyclicity in the early Brigantian (D2) limestones east of the Clwydian Range, North Wales and its use in correlation. Geological Journal 14, 69–86.CrossRefGoogle Scholar
Somerville, HEA and Somerville, ID (1998) Late Viséan conodont biostratigraphy and biofacies in the Kingscourt area, Ireland. Bollettino della Societa Paleontologica Italiana 37, 443–64.Google Scholar
Tanner, LH (2010) Continental carbonates as indicator of paleoclimate. In Carbonates in Continental Settings, Geochemistry, Diagenesis and Applications (eds Alonso-Zarza, AM and Tanner, LH), pp. 179–214. Developments in Sedimentology Vol. 62. Amsterdam: Elsevier.CrossRefGoogle Scholar
Thomas, TM (1971) Gash-breccias of south Pembrokeshire: fossil karstic phenomena? Transactions of the Institute of British Geographers 54, 89–100.CrossRefGoogle Scholar
Tucker, ME (2001) Sedimentology Petrology, 3rd ed. Oxford: Wiley-Blackwell, 262 pp.Google Scholar
Ulmer-Scholle, DS, Scholle, PA and Brady, PV (1993) Silicification of evaporites in Permian (Guadalupian) back-reef carbonates of the Delaware Basin, west Texas and New Mexico. Journal of Sedimentary Petrology 63, 955–65.Google Scholar
Vanstone, SD (1996) The influence of climatic change on exposure surface development: a case study from the Late Dinantian of England and Wales. In Recent Advances in Lower Carboniferous Geology (eds Strogen, P, Somerville, ID and Jones, GL), pp. 281–301. Geological Society of London, Special Publication no. 107.CrossRefGoogle Scholar
Vanstone, SD (1998) Late Dinantian palaeokarst of England and Wales: implications for exposure surface development. Sedimentology 45, 19–37.CrossRefGoogle Scholar
Viczian, I (1992) Diagenetic neoformation in Middle Triassic evaporitic and carbonate rocks, Mecsek Mts (S. Hungary). Acta Mineralogica-Petrographica, Szeged 33, 13–24.Google Scholar
Walkden, GM (1972) The mineralogy and origin of interbedded clay wayboards in the Carboniferous of the Derbyshire Dome. Geological Journal 8, 143–60.CrossRefGoogle Scholar
Walkden, GM (1974) Palaeokarstic surfaces in Upper Visean (Carboniferous) limestones of the Derbyshire Block, England. Journal of Sedimentary Petrology 44, 1232–47.Google Scholar
Walkden, GM (1987) Sedimentary and diagenetic styles in late Dinantian Carbonates of Britain. In European Dinantian Environments (eds Miller, J, Adams, AE. and Wright, VP), pp. 131–56. Chichester: Wiley.Google Scholar
Walkden, GM and Davies, J (1983) Polyphase erosion of subaerial omission surfaces in the Late Dinantian of Anglesey, North Wales. Sedimentology 30, 861–78.CrossRefGoogle Scholar
Walsh, PT, Battiau-Queney, Y, Howells, SE, Ollier, CD and Rowberry, MD (2008) The Gash Breccias of the Pembroke Peninsula, SW Wales. Geology Today 24, 137–45.CrossRefGoogle Scholar
Wanless, HR and Shepard, FP (1936) Sea level and climatic changes related to late Paleozoic cycles. Geological Society of America Bulletin 47, 1177–206.CrossRefGoogle Scholar
Waters, CN and Davies, SJ (2006) Carboniferous: extensional basins, advancing deltas and coal swamps. In The Geology of England and Wales (eds Brenchley, PJ and Rawson, PF), pp. 173–223. London: Geological Society of London.CrossRefGoogle Scholar
Waters, CN, Waters, RA, Barclay, WJ and Davies, JR (2009) A lithostratigraphical framework for the Carboniferous successions of southern Great Britain (onshore). British Geological Survey Research Report, RR/09/01.Google Scholar
Wendt, J, Kaufmann, B and Belka, Z (2001) An exhumed Paleozoic underwater scenery: the Visean mud mounds of the eastern Anti-Atlas (Morocco). Sedimentary Geology 145, 215–33.CrossRefGoogle Scholar
Woodcock, NH, Miller, AVM and Woodhouse, CD (2014) Chaotic breccia zones on the Pembroke Peninsula, South Wales: evidence for collapse into voids along dilatational faults. Journal of Structural Geology 69, 91–107.CrossRefGoogle Scholar
Wright, VP (1982a) The recognition and interpretation of palaeokarst: two examples from the Lower Carboniferous of South Wales. Journal of Sedimentary Petrology 52, 83–94.Google Scholar
Wright, VP (1982b) Calcrete palaeosols from the Lower Carboniferous Llanelly Formation, South Wales. Sedimentary Geology 33, 1–33.CrossRefGoogle Scholar
Wright, VP and Tucker, ME (1991) Calcretes: an introduction. In Calcretes (eds Wright, VP and Tucker, ME), pp. 1–22. International Association of Sedimentologists, Reprint Series 2. Oxford: Blackwell Scientific Publications.CrossRefGoogle Scholar
Wright, VP and Vanstone, SD (2001) Onset of late Palaeozoic glacio-eustasy and the evolving climates of low latitude areas: a synthesis of current understanding. Journal of the Geological Society, London 158, 579–82.CrossRefGoogle Scholar
Wright, VP, Vanstone, SD and Marshall, JD (1997) Contrasting flooding histories of Mississippian carbonate platforms revealed by marine alteration effects in palaeosols. Sedimentology 44, 825–42.CrossRefGoogle Scholar