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Bulletin of Volcanology

, Volume 56, Issue 6–7, pp 573–591 | Cite as

Evolution of an englacial volcano: Brown Bluff, Antarctica

  • I. P. Skilling
Original Paper

Abstract

Marine shallow-water to emergent volcanoes have been described in detail, but comparable englacial centres are not well documented. Brown Bluff is a Pleistocene, shallow water, alkali basaltic volcano whose deposits were ponded within an englacial lake, enclosed by ice >400 m thick. Its evolution is divided chronologically into pillow volcano, hyalotuff cone, slope failure and hyaloclastite delta/subaerial stages. Seventeen lithofacies and five structural units (A-E) are recognised and described. The pillow volcano stage (Unit A) is similar to those of many submarine seamount volcanoes. It comprises extrusive and intrusive pillow lavas draped by slumped hyaloclastite. Units B and D define the hyalotuff cone stage, which was centred on a summit vent(s), and comprises slumped, poorly sorted hyalotuffs redeposited downslope by sediment gravity flows and ponded against an ice barrier. This stage also includes water-cooled subaerial lavas and massive hyalotuffs ponded within a crater. Cone construction was interrupted by drainage of the lake and slope failure of the northeast flank, represented by debris avalanche-type deposits (Unit C). Unit E represents the youngest stage and consists of a Gilbert-type hyaloclastite delta(s), which prograded away from a summit vent(s), and compound subaerial lavas. A second drainage episode allowed subaerial lavas to accumulate in the surrounding trough.

Key words

hydrovolcanism englacial surtseyan tuff cone hyaloclastite 

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References

  1. Aalto KR (1976) Sedimentology of a melange: Franciscan of Trinidad, California. J Sed Pet 46:913–929Google Scholar
  2. Allen CC, Jercinovic MJ, Allen JSB (1982) Subglacial volcanism in north-central British Columbia and Iceland. J Geol 90:699–715Google Scholar
  3. Batiza R, Fornari DJ, Vanko DA, Lonsdale P (1984) Craters, calderas and hyaloclastites on young Pacific seamounts. J Geophys Res 89:8371–8390Google Scholar
  4. Bergh SG, Sigvaldason GE (1991) Pleistocene mass-flow deposits of basaltic hyaloclastite on a shallow submarine shelf, South Iceland. Bull Volcanol 53:597–611Google Scholar
  5. Bjornsson H (1988) Hydrology of ice-caps in volcanic regions. Soc Sci Islandica, Reykjavik, p 139Google Scholar
  6. Butterworth PJ (1990) The Cenozoic glacial sediments of the Antarctic Peninsula: evidence for late Oligocene glaciation and Pliocene warming. 13th International Sedimentological Congress, Nottingham, (abstr)Google Scholar
  7. Cas RAF, Landis CA, Fordyce RE (1989) A monogenetic, Surtlatype, Surtseyan volcano from the Eocene-Oligocene Waiareka-Deborah volcanics, Otago, New Zealand: a model. Bull Volcanol 51:281–298Google Scholar
  8. Fornari DJ, Malahoff A, Heezen BC (1978) Volcanic structure of the crest of the Puna Ridge, Hawaii: geophysical implications of submarine volcanic terrain. Bull Geol Soc Am 89:605–616Google Scholar
  9. Furnes H, Fridleifsson IB, Atkins FB (1980) Subglacial volcanics — on the formation of acid hyaloclastites. J Volcanol Geotherm Res 8:95–110Google Scholar
  10. Glicken H (1991) Sedimentary architecture of large volcanic-debris avalanches. In: Fisher RV, Smith GA (eds) Sedimentation in volcanic settings. SEPM Spec Publ 45:99–106Google Scholar
  11. A Honnorez J, Kirst P (1975) Submarine basaltic volcanism: morphometric parameters for discriminating hyaloclastites from hyalotuffs. Bull Volcanol 39:1–25Google Scholar
  12. Houghton BF, Wilson CJN (1989) A vesicularity index for pyroclastic deposits. Bull Volcanol 51:451–462Google Scholar
  13. Jones JG (1969) Intraglacial volcanoes of the Laugarvatn region, south-west Iceland, I. Q J Geol Soc London 124:197–211Google Scholar
  14. Jones JG (1970) Intraglacial volcanoes of the Laugarvatn region, southwest Iceland, II. J Geol 78:127–140Google Scholar
  15. Jones JG, Nelson PHH (1970) The flow of basalt lava from air into water — its structural expression and stratigraphic significance. Geol Mag 107:13–19Google Scholar
  16. Kokelaar BP (1986) Magma-water interactions in subaqueous and emergent basaltic volcanism. Bull Volcanol 48:275–289Google Scholar
  17. Kokelaar BP, Durant GP (1983) The submarine eruption and erosion of Surtla (Surtsey), Iceland. J Volcanol Geotherm Res 19:239–246Google Scholar
  18. Kuenen H (1952) Estimated size of the Grand Banks turbidity current. Am J Sci 250:874–884Google Scholar
  19. Larter RD, Barker PF (1989) Seismic stratigraphy of the Antarctic Peninsula Pacific margin: a record of Pliocene-Pleistocene ice volume and palaeoclimate. Geology 17:731–734Google Scholar
  20. Leat PT, Thompson RN (1988) Miocene hydrovolcanism in NW Colorado, USA, fuelled by explosive mixing of basic magma and wet unconsolidated sediment. Bull Volcanol 50:229–243Google Scholar
  21. LeMasurier WE (1972) Volcanic record of Cenozoic glacial history of Marie Byrd Land. In: Adie RJ (ed) Antarctic-geology and geophysics, Universitetsførlaget, Oslo, pp 215–223Google Scholar
  22. Long PE, Wood BJ (1986) Structures, textures, and cooling histories of Columbia River basalt flows. Geol Soc Am Bull 97:1144–1155Google Scholar
  23. Lonsdale P, Batiza R (1980) Hyaloclastite and lava flows on young seamounts examined with a submersible. Geol Soc Am Bull 91:545–554Google Scholar
  24. Lowe DR (1982) Sediment gravity flows: II. Depositional models with special reference to the deposits of high-density turbidity currents. J Sed Pet 52:279–297Google Scholar
  25. Mathews VM (1947) “Tuyas”. Flat-topped volcanoes in northern British Columbia. Am J Sci 245:560–570Google Scholar
  26. Moore JG (1985) Structure and eruptive mechanisms at Surtsey Volcano, Iceland. Geol Mag 122:649–661Google Scholar
  27. Moore JG, Phillips RL, Grigg RW, Peterson DW, Swanson DA (1973) Flow of lava into the sea 1969–1971, Kilauea volcano, Hawaii. Bull Geol Soc Am 84:537–546Google Scholar
  28. Morgenstern NP (1967) Submarine slumping and the initiation of turbidity currents. In: Richards AF (ed) Marine Geotechnique. 189–220Google Scholar
  29. Nelson PHH (1975) The James Ross Island Volcanic Group of north-east Graham Land. Brit Antarct Surv Sci Rept 54:1–62Google Scholar
  30. Nemec W (1990) Aspects of sediment movement of steep deltas. In: Collela A, Prior DB (eds) Coarse grained deltas. Spec Pub Int Assoc Sed 10:29–73Google Scholar
  31. Nemec W, Steel RJ, Gjelberg J, Collinson JD, Prestholm E, Oxnevad IE (1988) Anatomy of collapsed and re-established delta front in Lower Cretaceous of eastern Spitsbergen: gravitational sliding and sedimentation processes. Bull Am Assoc Petrol Geol 72:454–476Google Scholar
  32. Palmer BA, Neall VE (1989) The Murimotu Formation, 9500-year old deposits of a debris avalanche and associated lahars, Mount Ruapehu, North Island, New Zealand. N Z J Geol Geophys 32:477–486Google Scholar
  33. Porebski SJ, Gradzinski R (1990) Lava-fed Gilbert-type delta in the Polonez Cove Formation (Lower Oligocene), King George Island, West Antarctica. In: Colella A, Prior DB (eds) Coarse grained deltas. Spec Publ Int Assoc Sed 10:335–351Google Scholar
  34. Postma G, Roep TB (1985) Resedimented conglomerates in the bottomsets of Gilbert-type gravel deltas. J Sed Pet 55:874–885Google Scholar
  35. Rex D (1976) Geochronology in relation to the stratigraphy of the Antarctic Peninsula. Brit Antarct Surv Bull 43:49–58Google Scholar
  36. Siebert L (1984) Large volcanic debris avalanches: characteristics of source areas, deposits and associated eruptions. J Volcanol Geotherm Res 22:163–167Google Scholar
  37. Smellie JL (1987) Geochemistry and tectonic setting of alkaline volcanic rocks in the Antarctic Peninsula: a review. J Volcanol Geotherm Res 32:269–285Google Scholar
  38. Smellie JL, Skilling IP (1994) Products of subglacial volcanic eruptions under different ice thicknesses: two examples from Antarctica. Sed Geol 91:115–129Google Scholar
  39. Smellie JL, Pankhurst RJ, Hole MJ, Thomson JW (1988) Age distribution and eruptive conditions of Late Cenozoic alkaline volcanism in the Antarctic peninsula and eastern Ellsworth Land: review. Brit Antarct Surv Bull 80:21–49Google Scholar
  40. Smellie JL, Hole MJ, Nell PAR (1993) Late Miocene valley-confined subglacial volcanism in northern Alexander Island, Antarctic Peninsula. Bull Volcanol 55:273–288Google Scholar
  41. Sohn YK, Chough SK (1992) The Ilchulbong tuff cone, Cheju Island, South Korea: depositional processes and evolution of an emergent, Surtseyan-type tuff cone. Sedimentology 39:523–544Google Scholar
  42. Staudigel H, Schmincke HU (1984) The Pliocene seamount series of La Palma (Canary Islands). J Geophys Res 89:11 195–11 215Google Scholar
  43. Ui T (1983) Volcanic dry avalanche deposits-identification and comparison with non-volcanic debris stream deposits. J Volcanol Geotherm Res 18:135–150Google Scholar
  44. Voight B, Glicken H, Janda RJ, Douglass PM (1981) Catastrophic rockslide avalanche of May 18. In: Lipman PW, Mullineaux DR (eds) The 1980 eruptions of Mount St Helens, U S Geol Surv Prof Paper 1250:347–377Google Scholar
  45. Walker GPL, Blake DH (1966) Formation of a palagonite breccia mass beneath a valley glacier. Q J Geol Soc London 122:45–61Google Scholar
  46. Wohletz KH (1983) Mechanisms of hydrovolcanic pyroclast formation: grain-size, scanning electron microscopy, and experimental studies. J Volcanol Geotherm Res 17:31–63Google Scholar
  47. Worner G, Viereck L (1987) Subglacial to emergent volcanism at Shield Nunatak, Mt. Melbourne Volcanic Field, Antarctica. Polarforschung 57:27–41Google Scholar
  48. Wright AC (1980) Landforms of McMurdo Volcanic Group, Southern Foothills of the Royal Society Range, Antarctica. N Z J Geol Geophys 23:605–613Google Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • I. P. Skilling
    • 1
  1. 1.British Antarctic SurveyNatural Environment Research Council, High CrossCambridgeUK

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