Although the features of turquoise occurrences are consistent with a secondary or hypogene origin.
2.
The " hypogene " hypothesis holds that the aqueous solutions originate at significant depth, from hydrothermal processes.
3.
Covellite formed as clusters in these supergene enrichment zone oxidizes and redeposits covellite on hypogene sulfides ( pyrite and chalcopyrite ).
4.
These secondary sulfides arise from the leaching of the overlying ore and its re-deposition on and replacement of the deeper primary ( hypogene ) sulfides.
5.
This hypogene process is applicable to the original copper sulfide deposition; however, it is difficult to account for the many features of turquoise occurrences by a hypogene process.
6.
This hypogene process is applicable to the original copper sulfide deposition; however, it is difficult to account for the many features of turquoise occurrences by a hypogene process.
7.
From the surface down they are gossan cap, leached zone, oxidized zone, water table, enriched zone ( supergene enriched zone ) and primary zone ( hypogene zone ).
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