Salt from stratified deposits

The Carboniferous sediments of the Maritimes Basin were originally deposited as red-green interstratified continental to marginal siliciclastics, marine limestone, dolostone, gypsum, anhydrite, halite, and locally, potash. The salt deposits vary from stratified, with only minor structural complications, to those that have been tectonized into pillows, anticlines e.g., Penobsquis Deposit) and diapirs or domes. In the latter cases, structural complexities make the stratigraphic position of many of these deposits uncertain. 

Solution mining is more effective with salt domes than with stratified deposits, and Fig. 7.21 is drawn for a domal deposit. It is the favored process for extraction of NaCl from domes, and it is also widely used with deep-lying strata, where the cost of... 

Native sulfur may be formed from gypsum and anhydrite in evaporite deposits through the movement of saline waters and hydrocarbons and the influence of anaerobic sulfate-redudng bacteria. Major sulfur deposits associated vdth salt domes such as in the U.S. Gulf Coast and stratified sulfur deposits such as found in Sicily, Poland, and Iraq are thought to have been formed by this process. 

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