Gypsum evaporites in a patch reef of the upper Slite Group in the Silurian (Wenlock) of Gotland, Sweden

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Färber C, Munnecke A
Zeitschrift: GFF
Verlag: Taylor and Francis Ltd.
Jahr der Veröffentlichung: 2014
Band: 136
Heftnummer: 1
Seitenbereich: 75-79
ISSN: 1103-5897
eISSN: 2000-0863
Sprache: Englisch


Abstract


Calcite pseudomorphs after gypsum are observed in a patch reef in the upper Slite Group (Wenlock) on north-east (NE) Gotland (Sweden). The idiomorphic pseudomorphs occur (a) in silt-sized carbonate sediment in former moldic pores, (b) in the micritic matrix of bioclastic rudstones and (c) in the thrombolitic matrix of the reef. The dominance of stenohaline organisms in the reef indicates normal marine salinities during reef growth. The development of evaporitic conditions and the formation of evaporitic minerals therefore postdate reef growth. The authigenic gypsum crystals are interpreted to be formed by downward percolating hypersaline brines which existed on an extremely shallow carbonate platform during the early Homerian (latest Cyrtograptus lundgreni graptolite Zone) regression. © 2013 © 2013 Taylor & Francis.


FAU-Autoren / FAU-Herausgeber

Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


Autor(en) der externen Einrichtung(en)
Bundesanstalt für Gewässerkunde (BfG) / Federal Institute of Hydrology


Zitierweisen

APA:
Färber, C., & Munnecke, A. (2014). Gypsum evaporites in a patch reef of the upper Slite Group in the Silurian (Wenlock) of Gotland, Sweden. GFF, 136(1), 75-79. https://dx.doi.org/10.1080/11035897.2013.859173

MLA:
Färber, Claudia, and Axel Munnecke. "Gypsum evaporites in a patch reef of the upper Slite Group in the Silurian (Wenlock) of Gotland, Sweden." GFF 136.1 (2014): 75-79.

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