Industrial minerals

Industrial minerals - Fertilizers and other impotant...

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Unformatted text preview: Fertilizers and other impotant industrial minerals Guano!Mining in Peru In the Chincha islands, guano had built up over centuries. On some islands, guano deposits were 22 feet thick. Guano deposits were estimated at 11 million tons, and by the 1840s, a brisk trade had developed. Income from guano accounted for a whopping 80 percent of Perus revenue. So valuable was guano for agriculture and eapons production that more powerful countries maneuvered to cash in. Spain occupied the islands in 1866, ending the Peruvian windfal Phosphate Mining in Florida 25 % of the world supply There are four open-pit phosphate mining operations in southeast Idaho , producing nearly 6.5-million tons of phosphate ore a year. Phosphate mining in Idaho is concentrated in the southeast part of the state, near Idaho Falls, Soda Springs, and Pocatello. Phosphate is the largest industrial mineral produced in Idaho with yields amounting to 12 percent of the nation's total phosphate output. The processed ore is used largely for fertilizer. The phosphate is found as apatite, a calcium phosphate mineral. The phosphorus contained in the phosphate is an essential element in plants and animals. Apatite is a major constituent of an unusual sedimentary rock identified by geologists as the Permian-age Phosphoria Formation. The rock formed 260 million years ago in a large marine basin that extended from this part of Idaho into adjacent parts of Utah and Wyoming Borax Mining in Death Valley...
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Industrial minerals - Fertilizers and other impotant...

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