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Induced polarization of seafloor massive sulfides.
Hördt, Andreas, Bairlein, Katharina, Spagnoli, Giovanni, Jegen, Marion , Hannington, Mark D., Petersen, Sven
and Laurila, Tea E.
(2016)
Induced polarization of seafloor massive sulfides.
[Poster]
In: 4. International Workshop on Induced Polarization (IP2016). , 06.-08.06.2016, Aarhus, Denmark .
Abstract
Sefloor massive sulfides (SMS) are believed to constitute an important future mineral resource. Nevertheless, little is known about the electrical properties of SMS, in particular under in-situ conditions. We measured electrical impedance spectra of 40 samples, 30 of which are sulfidebearing, and 10 are unmineralized host-rock. The samples were saturated with sodium chloride solution with 5 S/m conductivity.
The resistivity magnitude shows a clear difference between mineralized and unmineralized samples, and also
a weak grouping between the different types of mineralization. The imaginary conductivity at 1 Hz indicates a more pronounced discrimination between mineralized and unmineralized samples, suggesting that complex measurements might be useful for exploration purposes. We also measured spectra under dry conditions.
Surprisingly, the sulfide-bearing samples exhibit significant phase shifts even for dry samples, indicating that the conducting minerals themselves cause a phase shift, and an interaction with an electrolyte might not be necessary.
Document Type: | Conference or Workshop Item (Poster) |
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Research affiliation: | OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems > FB4-MUHS Marine Mineralische Rohstoffe OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics |
Date Deposited: | 14 Jun 2016 08:37 |
Last Modified: | 23 Sep 2019 20:42 |
URI: | https://oceanrep.geomar.de/id/eprint/33065 |
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