page_title: Boulby Mine
hierarchical_section_title: Boulby Mine
caption_attribution_description: Boulby Mine, North Yorkshire is the deepest mine in the United Kingdom. It is a major source of potash, accounting for half of the UK output, with rock salt as a byproduct.
context_page_description: Boulby Mine is a 200-hectare site located just south-east of the village of Boulby, on the north-east coast of the North York Moors in Redcar and Cleveland, England. It is run by Cleveland Potash Limited, which is now a subsidiary of Israel Chemicals Ltd.
  In early 2016, polyhalite mining commenced. Polyhalite is a natural multi-nutrient fertiliser providing a source of potassium, calcium, magnesium, and sulfur. It is marketed as Polysulphate by ICL and is sold in 3 grades: granular, mini-granular and standard.
  As well as producing Polysulphate, a granulated blend of potash and Polysulphate is sold as PotashPluS - part of ICL's wider FertiliserPluS product spectrum.
  It originally produced half of the United Kingdom's output of potash, an agricultural fertiliser. The mined ore consists of 35–45% sylvite and 45–55% halite. The rock salt is extracted as a by-product and used across the region as a de-icing agent on roads in winter conditions. Other minerals are produced as waste to the main effort, but may be sought after by mineral collectors, such as boracite, which occurs just above the beds of potash.
context_section_description: Boulby Mine is a 200-hectare (490-acre) site located just south-east of the village of Boulby, on the north-east coast of the North York Moors in Redcar and Cleveland, England. It is run by Cleveland Potash Limited, which is now a subsidiary of Israel Chemicals Ltd. (ICL).
  In early 2016, polyhalite mining commenced. Polyhalite (K₂MgCa₂(SO₄)₄·2H₂O) is a natural multi-nutrient fertiliser providing a source of potassium, calcium, magnesium, and sulfur. It is marketed as Polysulphate by ICL and is sold in 3 grades: granular, mini-granular and standard.
  As well as producing Polysulphate, a granulated blend of potash and Polysulphate is sold as PotashPluS - part of ICL's wider FertiliserPluS product spectrum.
  It originally produced half of the United Kingdom's output of potash, an agricultural fertiliser. The mined ore consists of 35–45% sylvite ("potash", specifically potassium chloride) and 45–55% halite (rock salt, or sodium chloride). The rock salt is extracted as a by-product and used across the region as a de-icing agent on roads in winter conditions. Other minerals are produced as waste (gangue) to the main effort, but may be sought after by mineral collectors, such as boracite, which occurs just above the beds of potash.
caption: Surface workings at Boulby Mine
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