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Broken Hill is the type locality for a class of ore deposits known as Broken Hill Type, or BHT, ore deposits. [6] This is a classification grouping of similar deposits for use in ore genesis theories and mineral exploration methodologies. [10] The key criteria for BHT ore deposits are; [11]
Broken Hill's massive orebody, which formed about 1,800 million years ago, has proved to be among the world's largest silver–lead–zinc mineral deposits. The orebody is shaped like a boomerang plunging into the earth at its ends and outcropping in the centre.
The company was formed in 1888 as North Broken Hill Silver Mining [1] to exploit the rich silver, lead and zinc deposits at Broken Hill in western New South Wales, the name was shortened to North Broken Hill in 1905. Production at the original North Broken Hill mine wound down and it finally closed in 1993. [2]
The ranges contain numerous mineral deposits, most notably Broken Hill. It was reported in October 1856 that "within the last year or two numerous sheep-stations have been opened in the Barrier Ranges, affording a reasonable prospect, not only of increased pastoral wealth, but also of the gradual development of the mineral resources of the ...
A variety of mines occur in New South Wales, including Broken Hill Ore Deposit the world's richest zinc and silver mine; Bowdens Silver Deposits near Mudgee; Cadia-Ridgeway Mine 20 km south of Orange; Lake Cowal Campaign and Barrick Gold 125 km sw of Parkes; CSA Mine near Cobar mines copper; Endeavour Mine extracts zinc, is 43 km nw of Cobar ...
Argentiferous galena was accidentally discovered at Glen Osmond in 1841, and additional deposits were discovered near Broken Hill in 1876 and at Mount Isa in 1923. [12] Most galena in Australia is found in hydrothermal deposits emplaced around 1680 million years ago, which have since been heavily metamorphosed. [13]
The term Broken Hill was first used by the early British Explorer Charles Sturt in his diaries during his search for an inland sea in 1844. Western plains towns far away from the major rivers, such as Broken Hill, owe their existence to the mineral discoveries made in the decade after 1875, when spectacular deposits of gold, silver, copper and opal were found.
The mineral has been found in numerous places in US, Australia, Japan, Gabon, Fiji, New Guinea [6] and Czech Republic. In the United States, it was the principal vanadium ore mineral at the mines at Placerville, Colorado. In Australia roscoelite has been found at Kalgoorlie, Radium Hill and the Kintore Open Cut at Broken Hill. [citation needed]