Basal Induan (Early Triassic) giant sponge-microbial build-ups in Armenia: microfacies analyses and carbon isotope studies.

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Ressource 1Download: Frisenbichler-Baud Abstract: GIANT SPONGE-MICROBIAL BUILD-UPS IN ARMENIA:GSA 2016.pdf (85.86 [Ko])
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Serval ID
serval:BIB_D03A5752AA5A
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Institution
Title
Basal Induan (Early Triassic) giant sponge-microbial build-ups in Armenia: microfacies analyses and carbon isotope studies.
Title of the conference
GSA Annual Meeting in Denver, Colorado, USA
Author(s)
Friesenbichler Evelyn, Baud Aymon, Krystyn Leopold, Sahakyan Lilit, Richoz Sylvain
Publication state
Published
Issued date
2016
Language
english
Abstract
The Transcaucasia area (central Armenia) offers the opportunity to study a distinctive sponge-microbial community development in the
aftermath of the end-Permian mass extinction (Permian-Triassic Boundary sponge-microbialites PTBSM): isolated communities
started to built vertical edifices up to 12 m high during Griesbachian times (Induan, Lower Triassic), and show two growth phases
within a pelagic carbonate ramp. The first sponge-microbial build-ups, which are rich in sponge spicules, co-occur with impressive
calcium carbonate crystal fans (CCFs) that vary in thickness between 5 cm to 2 m. A comparison between the δ13C values from the
PTBSM that formed during the first growth phase and the surrounding sediment revealed a remarkable differences: the
δ13Cmicrobialite values are up to 2.3‰ more positive than the corresponding δ13Csediment values.
Keywords
Basal Triassic, sponge-microbial, Armenia
Create date
26/06/2022 14:08
Last modification date
28/11/2022 7:14
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