Dataset of geoelectrical properties for samples obtained at the Higashi-Aogashima Knoll Caldera hydrothermal field, Japan

Area of Science:

• Geophysics
• Rock Physics
• Marine Geology

Background:

• Seafloor hydrothermal rocks possess unique physical and electrical properties.
• Terrestrial rock physics models are often inadequate for interpreting seafloor geophysical data.
• Specialized datasets are crucial for understanding seafloor resistivity structures.

Purpose of the Study:

• To present a dataset of fundamental measurements and analyses of seafloor hydrothermal rock samples.
• To provide data on physical properties (porosity, particle density) and electrical properties (complex impedance).
• To facilitate the interpretation of geophysical and electromagnetic exploration data in seafloor hydrothermal systems.

Main Methods:

• Porosity and particle density were measured using the buoyancy method.
• Complex impedance data were acquired using electrochemical impedance spectroscopy with frequency sweeps.
• Cole-Cole fitting analyses and graphical representations were performed on impedance data.

Main Results:

• The dataset includes detailed physical and electrical property measurements of seafloor hydrothermal rocks.
• Cole-Cole analyses provide insights into the polarization characteristics of the rock samples.
• The data offers a foundation for understanding the distinct properties of these rocks.

Conclusions:

• This dataset bridges the gap in specialized data for seafloor hydrothermal systems.
• It is expected to improve rock physics models and aid in the interpretation of resistivity structures.
• The findings will advance the study of seafloor hydrothermal deposits and their resource potential.