Elsevier

Precambrian Research

Volume 53, Issues 3–4, November 1991, Pages 165-197
Precambrian Research

Research report
Coastal lithofacies and biofacies associated with syndepositional dolomitization and silicification (Draken Formation, Upper Riphean, Svalbard)

https://doi.org/10.1016/0301-9268(91)90071-HGet rights and content

Abstract

The Draken Formation (120–250 m) of northeast Spitsbergen (Svalbard) forms part of a thick Upper Proterozoic carbonate platform succession. It consists predominantly of intraformational dolomitic conglomerates, with excellent textural preservation. Six main lithofacies were recognized in the field: quartz sandstones, stromatolitic mats, conglomerates with silicified intraclasts, dolostone conglomerates with desiccated mudrocks, oolitic/pisolitic grainstones and fenestral dolostones.

A series of five main gradational biofacies were recognized from silicified (and rare calcified) microfossils. Biofacies 1 represents low-energy subtidal benthos (erect filaments) and plankton (acritarchs and vase-shaped microfossils) whereas biofacies 2 to 5 are microbial mat assemblages (with filamentous mat-builders, and associated dwellers and washed-in plankton) ranging from basal intertidal to high intertidal/supratidal.

Colour values (a measure of the lightness of the colour shade) of sawn rock samples were quantified using a Munsell chart, and exhibit a pronounced variation (means of major groups varying from 4.0 to 5.95) across the spectrum of subtidal to supratidal sediments as inferred from other criteria. The lightening in progressively more exposed sediments is related to lowering of organic carbon contents, probably mainly by oxidation.

Six types of early cement have been recognized. Calcite microspar (type 1) is common as a subtidal cement in many Proterozoic formations, whereas types 2 (subtidal isopachous fringes), 3 (subtidal hardground dolomicrite) and 4 (intertidal meniscus dolomicrite) are very similar to Phanerozoic examples except for their dolomitic mineralogy. Types 5 and 6 are complex and variable dolomite growths associated with expansion and replacive phenomena. They characterize the fenestral lithofacies and compare with modern supratidal cements. Consideration of diagenetic fabrics and truncation textures of intraclasts indicates that leaching, dolomitization, silicification were all significant syndepositional processes altering the original metastable carbonates.

The data set provides evidence for a spectrum of peritidal environments including ooid shoals, protected subtidal, tidal sandflats and protected carbonate mudflats. Different sections show a preponderance of particular facies. The coastal lithofacies continuum was completely dolomitized, unlike offshore to ooid shoal facies of adjacent formations. Dolomitization thus bears a relationship to depositional bathymetry. Although hydrodynamics clearly have a role, the potential importance of whiting precipitation in raising Mg/Ca in marginal marine environments is also stressed.

References (78)

  • T. Aigner

    Storm Depositional Systems

  • D.M. Aissouai

    Magnesian calcite cements and their diagenesis: dissolution and dolomitization, Mururoa Atoll

    Sedimentology

    (1988)
  • J.R.L. Allen

    Pedogenic carbonates in the Old Red Sandstone facies (late Silurian-early Carboniferous) of the Anglo-Welsh area, southern Britain

  • K. Amiri-Garroussi

    Eocene spheroidal dolomite from the western Sirte Basin, Libya

    Sedimentology

    (1988)
  • P.A. Baker et al.

    Occurrence and formation of dolomite in organic-rich continental margin sediments

    Am. Assoc. Petrol. Geol. Bull.

    (1985)
  • J. Bauld

    Geobiological role of cyanobacterial mats in sedimentary environments: production and preservation of organic matter

    BMR J. Aus. Geol. Geophys.

    (1981)
  • J. Bauld

    Benthic microbial communities of Australian saline lakes

  • R.A. Berner

    Principles of Chemical Sedimentology

  • J. Bertrand-Sarfati et al.

    Platform-to-basin facies evolution: the carbonates of Late Proterozoic (Vendian) Gourma (West Africa)

    J. Sediment. Petrol.

    (1983)
  • J. Bertrand-Sarfati et al.

    Pedogenetic and diagenetic fabrics in the Upper Proterozoic Sarnyéré Formation (Gourma, Mali)

    Precambrian Res.

    (1983)
  • B. Bloeser

    Melanocyrillium, a new genus of structurally complex Late Proterozoic microfossils from the Kwagunt Formation (Chuar Group), Grand Canyon, Arizona

    J. Palcontol.

    (1985)
  • P.K. Bose

    Penecontemporaneous dolomitization in the Precambrian Bhander Limestone, Rajasthan, India—a petrographic attestation

    Geol. Rundsch.

    (1979)
  • J.D. Carballo et al.

    Holocene dolomitization of supratidal sediments by active tidal pumping, Sugarloaf Key, Florida

    J. Sediment. Petrol.

    (1987)
  • N. Chow et al.

    Facies-specific calcitic and bimineralic ooids from Middle and Upper Cambrian platform carbonates, western Newfoundland, Canada

    J. Sediment. Petrol.

    (1987)
  • M.L. Coleman

    Geochemistry of diagenetic non-silicate minerals: kinetic considerations

    Philos. Trans. R. Soc. London Ser. A

    (1985)
  • M. Coniglio

    Neomorphism and cementation in ancient deep-water limestones, Cow Head Group (Cambro-Ordovician), western Newfoundland, Canada

    Sediment. Geol.

    (1989)
  • I.J. Fairchild

    Stages in a Precambrian dolomitization, Scotland: cementing versus replacement textures

    Sedimentology

    (1980)
  • I.J. Fairchild

    Sedimentation and origin of a late Precambrian “dolomite” from Scotland

    J. Sediment. Petrol.

    (1980)
  • I.J. Fairchild

    Dolomitic stromatolite-bearing units with storm deposits from the Vendian of East Greenland and Scotland: a case of facies equivalence

  • I.J. Fairchild et al.

    The Vendian of NE Spitsbergen: petrogenesis of a dolomite-tillite association

    Precambrian Res.

    (1984)
  • I.J. Fairchild et al.

    A tempestite-stromatolite-evaporite association (Late Vendian, East Greenland): a shoreface-lagoon model

    Precambrian Res.

    (1989)
  • I.J. Fairchild et al.

    Petrological and isotopic implications of some contrasting Late Precambrian carbonates, NE Spitsbergen

    Sedimentology

    (1987)
  • I.J. Fairchild et al.

    Late Proterozoic glacial carbonates in NE Spitsbergen: new insights into the carbonate-tillite association

    Geol. Mag.

    (1989)
  • I.J. Fairchild et al.

    Stratigraphic shifts in carbon isotopes from Proterozoic stromatolitic carbonates (Mauritania): influences of primary mineralogy and diagenesis

    Am. J. Sci.

    (1990)
  • J. Ferguson et al.

    Lithification of peritidal carbonates by continental brines at Fisherman Bay, South Australia, to form a megapolygon/spelean limestone association

    J. Sediment. Petrol.

    (1982)
  • S. Golubic

    Organisms that build stromatolites

  • S. Golubic

    Microbial mats and modern stromatolites in Shark Bay, Western Australia

  • J.W. Green et al.

    Paleobiology of distinctive benthic microfossils from the Upper Proterozoic Eleonore Bay Group, central East Greenland

    Am. J. Bot.

    (1987)
  • J.W. Green et al.

    Microfossils from oolites and pisolites of the Upper Proterozoic Eleonore Bay Group, central East Greenland

    J. Paleontol.

    (1988)
  • J.W. Green et al.

    Microfossils from silicified stromatolitic carbonates of the Upper Proterozoic Limestone-Dolomite “Series”, central East Greenland

    Geol. Mag.

    (1989)
  • J.P. Grotzinger

    Facies and evolution of Precambrian carbonate depositional systems: emergence of the modern platform archetype

  • J. Haller

    Geology of the East Greenland Caledonides

  • C.R. Handford et al.

    Salina-margin tepees, pisoliths, and aragonite cements, Lake MacLeod, Western Australia: their significance in interpreting ancient analogues

    Geology

    (1984)
  • L.A. Hardic

    Dolomitization: a critical view of some current views

    J. Sediment. Petrol.

    (1987)
  • W.B. Harland

    The Caledonian sequence in Ny Friesland, Spitsbergen

    Q. J. Geol. Soc. London

    (1959)
  • J.P. Hendry

    Diagenetic Studies of Bathonian Carbonates from Central and Eastern England

  • P.M. Herrington et al.

    Carbonate shelf and slope facies evolution prior to Vendian glaciation, central east Greenland

  • R.J. Horodyski

    Stromatolites of the Upper Siyeh Limestone (Middle Proterozoic), Belt Supergroup, Glacier National Park, Montana

    Precambrian Res.

    (1976)
  • B.J. Javor et al.

    Laminated microbial mats, Laguna Guerrero Negro, Mexico

    Geomicrobiol. J.

    (1980)
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