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单词 taconite
释义

taconite

enUK

tac·o·nite

T0009900 (tăk′ə-nīt′)n. A variety of chert containing magnetite and hematite, mined as an iron ore.
[After the Taconic (Mountains).]

taconite

(ˈtækəˌnaɪt) n (Geological Science) a fine-grained sedimentary rock containing magnetite, haematite, and silica, which occurs in the Lake Superior region: a low-grade iron ore[C20: named after the Taconic Mountains in New England]

tac•o•nite

(ˈtæk əˌnaɪt)

n. an iron-bearing chert mined as low-grade iron ore in the Mesabi Range. [1890–95, Amer.; after the Taconic Range in New York and Massachusetts; see -ite1]
Thesaurus
Noun1.taconite - a variety of chert containing magnetite and hematite; mined as a low-grade iron orechert - variety of silica containing microcrystalline quartziron ore - an ore from which iron can be extracted

taconite

enUK

taconite,

low-grade iron ore, a flintlike rock usually containing less than 30% iron. Resistant to drilling and to the extraction of its contained metal, the rock was long considered worthless. Experiments begun in 1912 by the American scientist Edward W. Davis and continued by him for nearly 40 years produced the pelletizing method for upgrading the ore. The development of the jet piercer (a high-temperature flame thrower) provided penetration speeds of up to 40 ft (12 m) an hour for blasting holes in the rock. In 1956 exploitation of the vast reserves of taconite in the Mesabi range of Minnesota was begun by some of the largest steel companies in the United States.

Taconite

 

metamorphosed, stratified, ferruginous rock of Precambrian age consisting of metalliferous and nonmetalliferous quartzites and schists alternating with and passing into one another many times. Taconite’s composition may include quartz, hematite, magnetite, biotite, chlorites, amphiboles, and carbonates. In the USSR, Precambrian ferruginous rocks, including ta-conite, are usually referred to as ferruginous quartzites. Taconites, especially magnetite forms, are mined as iron ores, for example, in the Labrador Iron Ore Belt.

taconite

[′tak·ə‚nīt] (geology) The siliceous iron formation from which high-grade iron ores of the Lake Superior district have been derived; consists chiefly of fine-grained silica mixed with magnetite and hematite.

taconite

enUK
  • noun

Words related to taconite

noun a variety of chert containing magnetite and hematite

Related Words

  • chert
  • iron ore
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更新时间:2024/12/23 10:43:22