Gypsum exploration using ASTER data in the Hormozgan province, south of Iran

Habibnia, A.; Ranjbar, Hojjatollah; Rahimipour, Gholamreza

doi:10.1007/s13146-022-00776-3

Cited by 2 publications

(1 citation statement)

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“…To identify gypsum-bearing areas with an economic value, researchers use a range of approaches, from surface geological methods to advanced spaceborne thermal emission and reflection radiometer (ASTER) images [6] in the preliminary stages of mineral exploration. However, in advanced stages of exploration, it is necessary to know the subsurface geology, and it is in these cases that core drilling is often used, which is very expensive.…”

Section: Introductionmentioning

confidence: 99%

Integrated Interpretation of Electrical Resistivity Tomography for Evaporite Rock Exploration: A Case Study of the Messinian Gypsum in the Sorbas Basin (Almería, Spain)

Pérez-López

García-López²,

González-Gil³

2023

Minerals

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In this study, we conduct an investigation of the Sorbas Basin (Almería, Spain) on the Messinian gypsum unit using geophysical prospecting methods. Geophysical electrical resistivity tomography (ERT) methods were applied to study the subsurface of this gypsum unit, the exploitation of which could be of interest economically, with different commercial specifications for alabastrine and selenitic gypsums. For the interpretation of the different ERT images, the data for the surface geology, borehole cores, and seismic refraction conducted at a point within the ERT profiles were used. The results obtained from this investigation can be used as a reference for other similar studies in other regions. It was observed that selenitic gypsum is more resistive than alabastrine gypsum; therefore, the diagenetic processes of dehydration (anhydritization) and hydration (gypsification) increase the “percolation” phenomenon through possibly ensuring a greater connectivity of the shale matrix. Fracturing and moisture can be used to fully determine the resistivity of the purest and most resistive gypsum, to the point of considerably lowering the resistivity in an entire area affected by fracturing. The use of different tests with different lengths for the same profile can help one better understand the structure of the gypsum body in the subsurface, especially when there are shale intercalations or more- or less-pure levels of gypsum that do not reach a value of a few meters in thickness, because these thinner levels of a few meters are not defined in the ERT images when the test is performed at depths of up to 75 m.

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Section: Introductionmentioning

confidence: 99%