Odin Mine is a disused lead

Lead

Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

 mine in the Peak District

Peak District

The Peak District is an upland area in central and northern England, lying mainly in northern Derbyshire, but also covering parts of Cheshire, Greater Manchester, Staffordshire, and South and West Yorkshire....

 National Park, situated at grid reference . It lies on a site of 25 hectares near the village of Castleton, England. It is the oldest documented mine in Derbyshire

Derbyshire

Derbyshire is a county in the East Midlands of England. A substantial portion of the Peak District National Park lies within Derbyshire. The northern part of Derbyshire overlaps with the Pennines, a famous chain of hills and mountains. The county contains within its boundary of approx...

 and is thought to be one of the oldest lead mines in England. The mine is a Scheduled Ancient Monument

Scheduled Ancient Monument

In the United Kingdom, a scheduled monument is a 'nationally important' archaeological site or historic building, given protection against unauthorized change. The various pieces of legislation used for legally protecting heritage assets from damage and destruction are grouped under the term...

 and has biological and geological significance within the Castleton Site of Special Scientific Interest

Site of Special Scientific Interest

A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

.

History

The origins of Odin Mine are unclear; many Peak District guidebooks and sources say that the mine was first worked by the Romans

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

 and subsequently by the Saxons

Saxons

The Saxons were a confederation of Germanic tribes originating on the North German plain. The Saxons earliest known area of settlement is Northern Albingia, an area approximately that of modern Holstein...

 and the Danes. Trevor D. Ford states "It was probably worked in Roman times, again in the Dark Ages and in Norman times". However, there is no historical evidence to back this up. The use of the name “Odin” is often cited as evidence that the mine was named by the Danes after their chief god. This is backed up by evidence that prior to the 19th century the mine was commonly called Oden in mining records, which is more in common with the traditional Danish spelling. The first mention of the mine in official records was in 1280 when a poacher John of Bellhag was put on trial for hunting at Bactor Wood in Castleton and at the entrance to Odin Mine. In the early days before explosives, the rock was weakened by fire setting: this involved heating the rock overnight by leaving fires lit and then cooling the rock with water the next morning causing the rock to shatter.
The Romans had great need for lead, especially for the plumbing systems in their dwellings. They mined the ore galena

Galena

Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral.Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms...

 extensively during their time in Britain, so it is possible that Odin Mine does have Roman origins. The mine is not mentioned again in documents until 1663. In the early 18th century Richard Bagshawe, later to become High Sheriff of Derbyshire, had a considerable stake in the mine. The Bagshawe family retained their interests at Odin until the 1850s. The mine was worked continuously throughout the 18th century with annual ore extraction varying between 100 and 800 tonnes per annum. In April 1706 a rich vein of lead was struck: 41 men and eight women were working at the site and the mine reached 500 metres into the hillside beneath Mam Tor

Mam Tor

Mam Tor is a hill near Castleton in the High Peak of Derbyshire, England. Its name literally translates as Heights of the Mother and it is also known as the Shivering Mountain on account of the instability of its lower shale layers...

.

Drainage problems in the mine meant that a proposal to build a low-level sough

Sough

A sough is an underground channel for draining water out of a mine. Its ability to drain a mine depends on the bottom of the mine being higher than a neighbouring valley...

 was put forward in 1772 but this was not completed for many years, probably not until the 1840s. It was driven up from Hollowford Brook at Trickett Bridge in Castleton to the workings. The mine produced extensive spoil and this was used by the Manchester

Manchester

Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater...

 and Sheffield

Sheffield

Sheffield is a city and metropolitan borough of South Yorkshire, England. Its name derives from the River Sheaf, which runs through the city. Historically a part of the West Riding of Yorkshire, and with some of its southern suburbs annexed from Derbyshire, the city has grown from its largely...

 Turnpike company in 1802 when constructing a new road between the two places. The spoil contained fluorspar, calcite

Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate . The other polymorphs are the minerals aragonite and vaterite. Aragonite will change to calcite at 380-470°C, and vaterite is even less stable.-Properties:...

, and barite

Barite

Baryte, or barite, is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte itself is generally white or colorless, and is the main source of barium...

 which was extracted in later years when their value became known. There was a gap in production between 1848 and 1852 and the Bagshawe family withdrew their interests from the mine in September 1856, handing over ownership to Robert How Ashton of Losehill Hall. Lead production at the mine stopped in 1869, although some working took place in 1908 and 1909 when considerable amounts of fluorspar and barite were excavated from the Mam Engine Shaft.

Geology

The veins of lead in the Castleton area formed 280 million years ago when a fault in the local Carboniferous

Carboniferous

The Carboniferous is a geologic period and system that extends from the end of the Devonian Period, about 359.2 ± 2.5 Mya , to the beginning of the Permian Period, about 299.0 ± 0.8 Mya . The name is derived from the Latin word for coal, carbo. Carboniferous means "coal-bearing"...

 limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 allowed mineralising fluids to flow into fissures in the rock, pushed up by great pressure from beneath the Earth's surface. Lead and sulphate combined to form the lead ore galena

Galena

Galena is the natural mineral form of lead sulfide. It is the most important lead ore mineral.Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms...

. In its heyday, the mine was a complex system of levels and shafts that extended for approximately 1500 metres into the Edale shales beneath the nearby Mam Tor. In the early days the mining was open cast, forming a gorge in the hillside with the water diverted by a leat

Leat

A leat is the name, common in the south and west of England and in Wales, for an artificial watercourse or aqueduct dug into the ground, especially one supplying water to a watermill or its mill pond...

 to the north to keep the workings dry. Later the miners followed the vein of lead underground. The vein is exposed on the surface in a small limestone outcrop at the entrance to the mine and then continues underground just south of due west in the limestone under the Edale shales of Mam Tor. The 1769 plans of the mine show that there were several branch veins leading from the main lead workings. There are several small pipe caverns contained within the mine; the most prominent of these is Odin Cave (called Gank Hole by the miners) which was formed by groundwater opening out a void between limestone boulders. There is no evidence that Blue John

Fluorite

Fluorite is a halide mineral composed of calcium fluoride, CaF2. It is an isometric mineral with a cubic habit, though octahedral and more complex isometric forms are not uncommon...

 was ever mined at Odin although the adjacent Treak Cliff Cavern

Treak Cliff Cavern

Treak Cliff Cavern is a show cave near Castleton in Derbyshire. It is part of the Castleton Site of Special Scientific Interest and by agreement with English Nature all the Blue John stone deposits on the visitor route are preserved. However, Blue John is regularly mined from areas not seen by...

 regularly mines the rock in areas not open to visitors.

The site today

The site of Odin Mine is owned by the National Trust

National Trust for Places of Historic Interest or Natural Beauty

The National Trust for Places of Historic Interest or Natural Beauty, usually known as the National Trust, is a conservation organisation in England, Wales and Northern Ireland...

. It consists of a limestone gorge, the original early workings before they went underground to follow the veins of ore. It looks like a natural limestone ravine with the workings now disguised by natural vegetation. To the left of the gorge is the two-metre-wide Odin Cave, which goes about 10 metres underground. The remaining spoil heaps are a protected archaeological site and support a wide variety of plants including Birdsfoot Trefoil

Lotus corniculatus

Lotus corniculatus is a common flowering plant native to grassland temperate Eurasia and North Africa. The common name is Bird's-foot Trefoil , though the common name is often also applied to other members of the genus...

, Eyebright

Euphrasia

Euphrasia is a genus of about 450 species of herbaceous flowering plants in the family Orobanchaceae , with a cosmopolitan distribution. They are semi-parasitic on grasses and other plants...

, Wild thyme

Wild thyme

Thymus serpyllum, known by the common names of Breckland Thyme, Wild Thyme or Creeping Thyme is a species of thyme native to most of Europe and North Africa. It is a low, usually prostrate subshrub growing to 2 cm tall with creeping stems up to 10 cm long, with oval evergreen leaves...

 and the Common spotted orchid

Common spotted orchid

The Common Spotted-orchid is acommonly occurring species of European orchid. It is widely variable in colour and height, ranging from 15 to 60 cm in height. The flower colour can vary from white to pale purple with purple spots. The lip has three lobes...

. Some plants called metallophyte

Metallophyte

A metallophyte is a plant that can tolerate high levels of heavy metals such as lead. Such plants range between "obligate metallophytes" , and "facultative metallophytes" which can tolerate such conditions but are not confined to them.European examples include Alpine Pennycress, the Zinc Violet ,...

s can tolerate the high levels of metal in the soil: these include Spring Sandwort

Arenaria (plant)

Arenaria is a genus of flowering plants, within the family Caryophyllaceae.Species of this genus are among those plants commonly known as "sandworts". Several species formerly classified within Arenaria are now classed in the genera Spergularia, Eremogone and Minuartia.Species include:*Arenaria...

 and Alpine Scurvy-grass

Scurvy-grass

Scurvy-grass is a genus of about 30 species of annual and perennial herbs in the cabbage family Brassicaceae...

. A gritstone

Gritstone

Gritstone or Grit is a hard, coarse-grained, siliceous sandstone. This term is especially applied to such sandstones that are quarried for building material. British gritstone was used for millstones to mill flour, to grind wood into pulp for paper and for grindstones to sharpen blades. "Grit" is...

 crushing wheel, 1.75 metres in diameter with its iron tyre and circular iron track, used to crush the ore, can still be seen at the site. The crusher was built in 1823 at a cost of £40.

See also

• Derbyshire lead mining history
  Derbyshire lead mining history
  This article details some of the history of lead mining in Derbyshire, England.- Background :On one of the walls in Wirksworth church is a crude stone carving, found nearby at Bonsall and placed in the church in the 1870s. Probably executed in Anglo-Saxon times, it shows a man carrying a kibble or...