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Rock salt mineral resources refer to the ancient solid salt mineral deposits formed prior to the Quaternary in general. For China's ancient salt mineral deposits, the essential salt-forming epochs are the Sinian, Triassic, Cretaceous and Tertiary and those of secondary importance are the Middle Ordovician, Early Permian, and Jurassic.

According to such factors as the depositional environment and material source, rock salt deposits can be classified into two types: marine sedimentary and continental sedimentary.

Trait of rock salt mineral resources

1) Marine sedimentary rock salt deposits.These deposits were formed by the evaporation and deposition of saline materials derived from the seawater in closed and semi-closed bays and lagoonal basins over a long period of time. Their salt-bearing rock series are mainly made up of carbonate formations in addition to the arenaceous and argillaceous rock formations of littoral lake facies. The marine salt deposits are characterized by large size, deep burial, unitary ore composition, high NaCl content (commonly 80%~95%), and abundant reserve. Over 10 rock salt deposits in China are known to have an explored NaCl reserve of over 10 billion tons each. The representative deposits are the Weixi salt deposit in Sichuan and the Middle Ordovician salt deposits in Linfen of Shanxi and Yanchang of Shaanxi. The explored salt reserves of the marine rock salt deposits of China amount to 85% of the country's total reserves of all salt mineral deposits.As the professional manufacturer of complete sets of mining machinery, such as vibrating feeder,ball mill, Henan Hongxing is always doing the best in products and service.limestone rotary kiln:http://www.hxjq-crusher.com/23.html.ore separating line:http://www.hxjqchina.com/.

2) Continental sedimentary rock salt deposits. These rock salt deposits were formed by the prolonged evaporation and deposition of saline materials after they had been brought by the surface water and groundwater to and accumulated in inland basins. The salt-bearing rock series are all composed of arenitic and pelitic rock formations. The continental facies rock salt deposits are characterized by shallower burial depth, smaller mineralization area and lower NaCl content (commonly 70%~80%) than those of the marine facies salt deposits, large number of salt beds, small single-bed thickness, presence of many associate components and frequent facies variation. The continental rock salt deposits of China were primarily formed posterio to the Jurassic and are concentrated in Yunnan, Hunan, Henan, Jiangxi and other provinces. They are represented by the Yunying salt deposit in Hubei.

Rock salt deposits are preliminarily divided into 3 industrial types with 9 subtypes in accordance with their industrial significance, and the requirements of geological exploration and production technology with comprehensive consideration of the genesis, salt ore composition, tectonic deformation and other features of the deposits.