Basal Induan (Early Triassic) giant sponge-microbial build-ups in Armenia: microfacies analyses and carbon isotope studies.
Détails
Etat: Public
Version: Final published version
Licence: Non spécifiée
ID Serval
serval:BIB_D03A5752AA5A
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Institution
Titre
Basal Induan (Early Triassic) giant sponge-microbial build-ups in Armenia: microfacies analyses and carbon isotope studies.
Titre de la conférence
GSA Annual Meeting in Denver, Colorado, USA
Statut éditorial
Publié
Date de publication
2016
Langue
anglais
Résumé
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.
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.
Mots-clé
Basal Triassic, sponge-microbial, Armenia
Création de la notice
26/06/2022 15:08
Dernière modification de la notice
28/11/2022 8:14
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