An unusual sponge - microbe - synsedimentary cement framework in a Late Ordovician reef, Southampton Island (Nunavut, Canada)

被引:5
作者
Castagner, Ariane [1 ]
Desrochers, Andre [1 ]
Lavoie, Denis [2 ]
机构
[1] Univ Ottawa, Dept Earth & Environm Sci, Ottawa, ON K1N 6N5, Canada
[2] GSC Quebec, CGC Quebec, Nat Resources Canada, 490 Rue Couronne, Quebec City, PQ G1K 9A9, Canada
关键词
HUDSON-BAY BASIN; ANTICOSTI ISLAND; STRATIGRAPHY; INSIGHTS; EVENT;
D O I
10.1139/cjes-2015-0244
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
A large, resistant buildup at the top of the Upper Ordovician (Hirnantian?) Red Head Rapids Formation on Southampton Island (Nunavut, Arctic Canada) is dominated by massive boundstone and cementstone facies. These massive facies have more in common with the sponge-microbial reefs that dominated worldwide in the Early Ordovician, including the following primary components: early calcified sponge material, microbial elements, and synsedimentary cement. A close spatial relationship between sponge and microbial framework elements suggests that a poorly preserved decaying sponge framework provided substrates for the attachment and development of microbes and that the microbes played essential roles as reef consolidators. Centimetre-scale colonial metazoans are present and locally intergrown with the sponge and microbial components. Other mound-dwelling invertebrates or calcareous algae are rare. Although altered now to calcite, cement fabrics suggest that aragonite was ubiquitous as seafloor precipitate. Prior to its subaerial exposure in the latest Ordovician, the Red Head Rapids Formation buildup developed on the margin of a shallow-marine evaporative epicratonic basin where a diverse community of reef-building metazoans was unable to flourish.
引用
收藏
页码:815 / 822
页数:8
相关论文
共 31 条
  • [11] Hamblin A.P., 2008, GEOLOGICAL SURVEY CA, V5371, P1
  • [12] Late Ordovician carbonate mounds from North Greenland: a peri-Laurentian dimension to the Boda Event?
    Harper, David Alexander Taylor
    Jin, Jisuo
    Rasmussen, Christian Mac Orum
    [J]. GFF, 2014, 136 (01) : 95 - 99
  • [13] Heywood W.W., 1976, MEMOIR, V382
  • [14] Hu K., 2011, GEOLOGICAL SURVEY CA, DOI [10.4095/289545, DOI 10.4095/289545]
  • [15] Precisely locating the Ordovician equator in Laurentia
    Jin, Jisuo
    Harper, David A. T.
    Cocks, L. Robin M.
    McCausland, Phil J. A.
    Rasmussen, Christian M. O.
    Sheehan, Peter M.
    [J]. GEOLOGY, 2013, 41 (02) : 107 - 110
  • [16] Terminal Ordovician carbon isotope stratigraphy and glacioeustatic sea-level change across Anticosti Island (Quebec, Canada)
    Jones, David S.
    Fike, David A.
    Finnegan, Seth
    Fischer, Woodward W.
    Schrag, Daniel P.
    McCay, Dwight
    [J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2011, 123 (7-8) : 1645 - 1664
  • [17] The Paleozoic Hudson Bay Basin in northern Canada: New insights into hydrocarbon potential of a frontier intracratonic basin
    Lavoie, Denis
    Pinet, Nicolas
    Dietrich, Jim
    Chen, Zhuoheng
    [J]. AAPG BULLETIN, 2015, 99 (05) : 859 - 888
  • [18] LI Yue, 2003, FACIES, V48, P269, DOI DOI 10.1007/BF02667544
  • [19] Degradative calcification of a modern siliceous sponge from the Great Bahama Bank, the Bahamas: A guide for interpretation of ancient sponge-bearing limestones
    Neuweiler, Fritz
    Daoust, Isabelle
    Bourque, Pierre-Andre
    Burdige, David J.
    [J]. JOURNAL OF SEDIMENTARY RESEARCH, 2007, 77 (7-8) : 552 - 563
  • [20] Architecture and subsidence history of the intracratonic Hudson Bay Basin, northern Canada
    Pinet, Nicolas
    Lavoie, Denis
    Dietrich, Jim
    Hu, Kezhen
    Keating, Pierre
    [J]. EARTH-SCIENCE REVIEWS, 2013, 125 : 1 - 23