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In this report we present the results of laboratory measurements carried out to explore
the electrical properties of gabbroic and troctolitic samples from Integrated Ocean
Drilling Program (IODP) Hole U1309D in the Atlantis Massif, an oceanic core complex
located at 30°N on the Mid-Atlantic Ridge. Oceanic core complexes are presumably localized
in portions of heterogeneous oceanic crust that are relatively rich in igneous rocks
and are the locus of significant hydrothermal activity. Electrical properties of igneous
rocks are used to discuss the rocks’ porosity structure as a function of mineralogy,
alteration processes, and deformation. Electrical properties of the gabbroic suites
sampled during IODP Expedition 304/305 can contribute to the understanding of these
processes in the Atlantis Massif. We present the full suite of electrical data together
with density and porosity measurements on the same suite of samples.