Boling

BOLING (EN: Boling; RU: Боулинг) is one of the oldest enterprises within the USA for the extraction of sulfur, within the Texas state. It has been built during the 1929 on the base of the Boling deposit, which has been discovered during the 1922, and belongs to the "Texas Gulf Inc." company.

The deposit is of the epigenetic type, is confined to the sulfur-bearing limestones and gypsum-anhydrite-calcite brecciated rocks (the mixture of gypsum, calcite, anhydrite) within the roof of the salt dome with the area of 0.7 square kilometres. The depth of embedment of the sulfur-bearing stratum is 210 metres, the thickness is 183 metres. The bedrocks are anhydrites. Sulfur in the form of granular masses and crystalline aggregates fills the cracks and voids within the limestones, and forms the cement of the breccias. The reserves of sulfur (remaining), which may be extracted, are 25 million tonnes. The extraction is performed by the method of Frasch (see the "Underground smelting" article). As the heat transfer substance (the consumption per 1 tonne of sulfur is 14.5 cubic metres), there are used the fresh waters of the San Bernard river, and of the artesian wells. The annual productive capacity of enterprise is 1.5 million tonnes of sulfur. The extraction of sulfur is 3300 tonnes per day (1980).