Well,

Tracing the same as in sedimentary rocks, with some undermentioned comments.

Basalt flow is considered very effective when compared to limestone, where there are pores between the lava layers and tubes and in the dividers resulting from the size of the rash. Other volcanic rocks such as rhyolite, tuff, and volcanic ash are less permeable than basalt.

 The metamorphic and crystalline rocks are considered relatively impermeable except in the case of cracking and are not exploited except in special cases such as their proximity to the surface and the large cracking.

 In general, sources of mineral water and hot water in regions of volcanic, igneous and metamorphic nature can be divided into:

1- Juvenile or deep water (Juvenile)

         The water that comes directly for the first time from the depths of the earth's crust to the surface of the earth is called juvenile water or deep water. The importance of this water lies in its first exit to the surface and it is often hot water and its passage through various configurations, causing chemical reactions that lead to dissolving its components and the presence of Chemical components of different amounts in this water are due to these reactions, while the rise in water temperature is due to the fact that they come from the depths.

2- Vadose Water

     The water on the surface of the earth is filtered down by gravity through voids, cracks, fractures, crevices, etc., and its temperature rises there, and with the passage of time, it can come out again to the surface of the earth to be hot water or Vaduz water.

3- Mixed water: Juvenile water rises from the depths of the earth to the top and mixes in some areas with vadose water that leaks from the surface and forms a third kind of hot mineral water called mixed water. Volcanic, while Vadose water is found in the areas of ground movement and areas of bending, faults, cracks, and voids, it was noted that there is a clear relationship between volcanoes and mineral water following the rise of gases and hot water accompanying the eruptions of volcanoes.

Regards

Most probably based on geochemical and isotopic technique (δ18O and δ2H ). Groundwater hydrology and fracture connectivity at EHP by using a combination of methods involving borehole logging and hydraulic tests will be acceptable. Any how sample solutions have to be diluted before the titration.

You could explore the following:

Vertical Electric Probes (SEV)

Injection of electric calicatas (CE)

Electric Geotomography Current (TGE)

Induced polarization (PI)

Spontaneous Potential Current Field (PE)

Hi,

There is an article about submarine groundwater in a volcanic coastal area done by By. M. Bayani Cardenas Raymond S. Rodolfo Mark R. Lapus Hillel B. Cabria Jose Fullon Gordos R. Gojunco Daniel O. Breecker Danica M. Cantarero Jaivime Evaristo Fernando P. Siringan Tongwei Zhang .