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Underground operations at Prominent Hill. Credit: OZ Minerals Limited. Thanks to satellite technology people carrying a GPS device can generally be located anywhere on the surface of our planet to within an accuracy of around 25ft. But underground there is whole different set of challenges when it comes to communicating and locating 2021-3-17 A mountain range in three dimensions. In the hunt for underground metals or other resources like oil, gas, or water, geophysical fields such as gravity, magnetics, temperature, polarization, and The best place to find minerals is at mine s. Mines are locations where industrially important rocks, minerals, and ore s, as well as precious metal s and gemstones are extracted from the earth. Mines can produce large amounts of specimens of certain minerals, and continue to provide specimens as long as the mine is actively worked. In all these methods we use the properties of the minerals and our knowledge of the lithosphere to locate them underground, without going underground ourselves. For example, iron is magnetic so instruments measuring the changes in the magnetic field can give us clues as to where pockets of iron could be. 2020-10-23 The goal is to locate specific minerals underground in order to estimate the amount of oil and gas reserves before drilling. Miners blast and tunnel into rock to gain access to the ores. How underground mining is approached — from above, below, or sideways — depends on the placement of the ore body, its depth, the concentration of ore, and the strength of the surrounding rock. Underground Mixed Minerals 1. Albite; Amazonite (Microcline Feldspar) Aragonite; Astrophyllite; Atacamite; Aurichalcite; Brochantite; Cassiterite; Celestine; Cerussite; Chalcotrichite; Chrysocolla; Cleavelandite; Conichalcite; Corundum (var. Ruby) Creedite; Crocoite; Cyanotrichite; Dioptase; Dolomite; Duftite; Epidote; Erythrite; Ferberite; Fluorapatite; Fuchsite; Glendonite; Goethite; Mixed Minerals The principal means of access to an underground ore body is a vertical opening called a shaft. The shaft is excavated, or sunk, from the surface downward to a depth somewhat below the deepest planned mining horizon. At regular intervals along the shaft, 
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