The formation of micritic limestones and the development of limestone-marl alternations in the Silurian of Gotland, Sweden

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Munnecke A, Samtleben C
Zeitschrift: Facies
Verlag: Springer Verlag (Germany)
Jahr der Veröffentlichung: 1996
Band: Facies
Heftnummer: 34
Seitenbereich: 159-176
ISSN: 0172-9179
Sprache: Englisch


Abstract


Micritic Iimestone-mari alternations make up the

major part of the Silurian strata on Gotland (Sweden).

Their position on the stable Baltic Shield protectcd them

from deep burial and tectonic stress and allowed the

preservation of early stages of burial diagenesis, incl uding

lilhification. In the micritic Iimestones certain characteristics

have been preserved (e.g., pitted microspar

crystals, sharp bot;ndaries between microspar and components,

Iack of deformation phenomena) that offcr

insights into lheir formation. We suppose thc formation

of lhese micritic Iimestones and Iimestone-mari alternations

to be based on a rhylhmic diagenesis within an

aragonite solution zone (ASZ) close below the sediment

surface. The micritic Iimestones are the product of a

poikilotopic cementation of carbonate muds which consisted

of varying portions of aragonitic, calcitic and

terrigenaus matter. Their microspar crystals show the

primary size and shape of the cements lithifying the

original carbonate mud. Dissolution of aragonite in the

marls provided the carbonate for the lithification of the limestones. By cementation, lhe Iimestone beds evaded

further compaclion. The marls, which already underwent a

volume decrease by aragonite depletion, lacked cement and

became more and more compacted due to increasing se
overburden. Allhough field Observationsshow lhat

primary differences in material influence lhe development

of Iimestone-mari alternations lhey are notrequired for lheir

formation.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Munnecke, Axel Prof. Dr.
Lehrstuhl für Paläoumwelt


Forschungsbereiche

Klima und Ressourcen
Forschungsschwerpunkt einer Fakultät: Naturwissenschaftliche Fakultät


Zitierweisen

APA:
Munnecke, A., & Samtleben, C. (1996). The formation of micritic limestones and the development of limestone-marl alternations in the Silurian of Gotland, Sweden. Facies, Facies(34), 159-176. https://dx.doi.org/10.1007/BF02546162

MLA:
Munnecke, Axel, and Christian Samtleben. "The formation of micritic limestones and the development of limestone-marl alternations in the Silurian of Gotland, Sweden." Facies Facies.34 (1996): 159-176.

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