Geologica Belgica

1374-8505 2034-1954

 

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An JANSSEN & Rudy SWENNEN

Organic components and diagenetic products in the travertine deposit at Villers-devant-Orval  (S. Belgium)

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Mots-clés : KEYWORDS: travertine, algal and cyanobacterial filaments, diagenesis, needle-like calcite crystals, gothic-arch calcite crystals

Abstract

ABSTRACT. The travertine deposit at Villers-devant-Orval (S. Belgium) formed during the Preboreal till the Boreal. In the first terrace studied in this paper, five lithostratigraphic units were distinguished, based on the presence of gravel, loam, peat and fine, medium grained and coarse travertine. Within the latter, encrusted branches and algal and cyanobacterial filaments are the most important organic components. Vadose diagenesis of the deposit is indicated by the presence of needle-crystals, fiber calcite crystals and dendrites. Meteoric phreatic diagenetic products occur as gothic-arch calcite crystals and euhedral crystals, which cement the pores.

To cite this article

An JANSSEN & Rudy SWENNEN, «Organic components and diagenetic products in the travertine deposit at Villers-devant-Orval  (S. Belgium)», Geologica Belgica [En ligne], number 3-4, volume 2 (1999), 39-53 URL : http://popups.ulg.ac.be/1374-8505/index.php?id=1797.

About: An JANSSEN

Fysico-chemische geologie, K.U.Leuven, Celestijnenlaan200C, B-3001 Heverlee, Belgium. E-mail:, An.Janssen@geo.kuleuven.ac.be,

About: Rudy SWENNEN

Fysico-chemische geologie, K.U.Leuven, Celestijnenlaan200C, B-3001 Heverlee, Belgium, E.mail: Rudy. Swennen @ geo. kuleuven.ac. be