Is there an active hydrothermal flux from the orca seamount in the bransfield strait, antarctica?

Vista sencilla de ítem
dc.contributor.authorRodrigo, Cristian
dc.contributor.authorBlamey, Jenny M.
dc.contributor.authorHuhn, Oliver
dc.contributor.authorProvost, Christine
dc.date.accessioned2022-07-05T23:08:27Z
dc.date.available2022-07-05T23:08:27Z
dc.date.issued2018-09
dc.descriptionIndexación Scopuses
dc.description.abstractThe rifting zone of Bransfield Strait, Antarctica, is tectonically and geologically unique. It is a back-arc basin that was opened by extensional forces associated to roll-back subduction after cessation of spreading activity of the Phoenix Ridge, and the transtension of the westward ending of Scotia-Antarctica Plate boundary. The Bransfield Rift/ Ridge is still active generating volcanism or magma rise to force hydrothermal activity. During the ANT-XXV/4 cruise onboard R/V “Polarstern”, standard CTD and beam transmission measurements were done to determine temperature anomaly and turbidity. Water sampling was performed to determine δ 3 He and to find thermophilic microorganisms to examine the Orca seamount hydrothermal activity. A temperature anomaly of ~0.08 °C, a pick of turbidity, and high value of δ 3 He (>10%) were found inside Orca seamount. Results are consistent with a hydrothermal flux coming from the seamount. The report of the first observation of thermophilic and hyperthermophilic microorganisms in cold deep Antarctic waters is part of this study. Inside Orca seamount these microorganisms were found at three different depth levels close to the bottom. We suggest that the fluid migration from the volcano resulted from recent magmatic activity and provided the required elemental nutrients for microbial growth. Besides some thermophiles were found outside the seamount in a small quantity close to the seafloor. These would probably be related to subsidiary structures of the Orca seamount, or were transported by currents from other active volcanic sites as Deception Island. The finding of these thermophilic and hyperthermophilic microorganisms raise questions about the dispersal and their resistance in these extreme environments. © 2018, Servicio Nacional de Geologia y Mineria. All rights reserved.es
dc.description.urihttp://www.andeangeology.cl/index.php/revista1/article/view/V45n3-3086
dc.identifier.citationAndean Geology Volume 45, Issue 3, Pages 344 - 3561 September 2018es
dc.identifier.doi10.5027/andgeoV45n3-3086
dc.identifier.issn07187092
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/23178
dc.language.isoenes
dc.publisherServicio Nacional de Geologia y Mineriaes
dc.subjectAgrotises
dc.subjectAntarcticaes
dc.subjectDeceptiones
dc.subjectAtlantic Oceanes
dc.subjectBransfield Straites
dc.subjectDeception Islandes
dc.subjectGulf of Mexicoes
dc.subjectOrca Basines
dc.subjectSouth Shetland Islandses
dc.titleIs there an active hydrothermal flux from the orca seamount in the bransfield strait, antarctica?es
dc.typeArtículoes
Archivos
Bloque original
Mostrando 1 - 1 de 1
Miniatura
Nombre:
Rodrigo_C_Is_there_2018.pdf
Tamaño:
1.09 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO EN INGLÉS
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FIng - Artículos de Revista