RV POSEIDON Fahrtbericht / Cruise Report POS524 - GrimseyEM: Geophysical and geological investigations in the vicinity of the Grimsey Hydrothermal Field offshore Northern Iceland for the assessment of the geothermal potential and the exploration for potential mineralizations within the seafloor, Reykjavik (Iceland) – Bergen (Norway), 7.6 - 26.6.2018 .

Hölz, Sebastian and Martins, Sofia, eds. (2018) RV POSEIDON Fahrtbericht / Cruise Report POS524 - GrimseyEM: Geophysical and geological investigations in the vicinity of the Grimsey Hydrothermal Field offshore Northern Iceland for the assessment of the geothermal potential and the exploration for potential mineralizations within the seafloor, Reykjavik (Iceland) – Bergen (Norway), 7.6 - 26.6.2018 . Open Access . GEOMAR Report, N. Ser. 044 . GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany, 69 pp. DOI 10.3289/CR_POS524.

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Abstract

In the marine environment elevated electrical conductivities may be caused by sulfide mineralizations within the seafloor as well as hot saline pore fluids. Such conductive targets may be studied with suitable electromagnetic systems like the novel coil-system MARTEMIS1, which we previously used to investigate a known zone of sediment covered mineralization at the Palinuro Seamount (cruises POS483 & POS509) and in the vicinity of the TAG hydrothermal mound at the Mid Atlantic Ridge (cruise JC138). Both the Palinuro site as well as the sites in the vicinity of the TAG hydrothermal mound (Shinkai, Double Mound, MIR) are hydrothermally inactive and, thus, allowed to study, how the responses of an inductive EM system is influenced and shaped by mineralizations within the seafloor without having to consider the effect of of heated pore fluids. In the interpretation of the collected data at these inactive sites we learned that the MARTEMIS system is able to detect conductivity anomalies in the vicinity of mineralizations. (...)

Document Type: Report (Cruise Report)
Keywords: RV Poseidon, POS524, Cruise report, GrimseyEM, Grimsey Hydrothermal Vent Field, MARTEMIS system
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
DOI etc.: 10.3289/CR_POS524
ISSN: 2193-8113
Expeditions/Models/Experiments:
Date Deposited: 10 Oct 2018 12:19
Last Modified: 12 Oct 2018 09:02
URI: http://oceanrep.geomar.de/id/eprint/44465

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