Brown Hematite definition of Brown Hematite in the Free Online Encyclopedia.

brown hematite: see limonite limonite or brown hematite , yellowish to dark brown mineral, a hydrated oxide of iron, FeO(OH)·nH₂O, occurring commonly in deposits of secondary origin, i.e., those formed by the alteration of minerals containing iron.
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brown hematite [¦brau̇n ′hem·ə‚tīt]

(mineralogy)

limonite

Brown Hematite

an iron ore consisting of a natural agglomeration of hydroxides of iron (goethite, hydro-goethite, lepidocrocite, and other hydroxides) mixed with oxides and hydroxides of silicon and aluminum. Brown hematite is a finely dispersed mixture of minerals, ranging in color from dark-brown to light-yellow. It is observed in the form of friable ocherous masses, oolites, bean ore, concretions, and stalactites. It sometimes displaces pyrite, marcasite, and other iron-bearing sulfides, carbonates, and oxides and the organic mineral remains.

Brown hematite is one of the most widely distributed iron ores, having industrial value when it contains more than 30 per cent iron and a sufficiently small percentage of harmful admixtures—sulfur, phosphorus, and arsenic. Formation of brown hematite is due to oxidation processes in the surface zone of the earth’s crust. It is widely used in the metallurgical industry. The most important deposits of brown hematite are sedimentary (sea, river, lake, and marsh) and erosion crusts of ultrabasic rocks. The largest sedimentary oolite deposits of brown hematite are in the Western Siberian basin, Lisakovsk, Aiat, and Kerch, of the USSR, and in the Lotharingian area of France. Naturally alloyed brown hematite deposits of the erosion crust of ultrabasic rocks (with admixtures of nickel, chromium, and cobalt), which serve as the raw material for smelting of chrome-nickel steels and crude iron, are found in the USSR in the Urals (Khalilovo, Serov, and other locations), in Cuba (Mayari), and in New Caledonia.

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No references found	Rock samples consisted of quartz mica schist and medium grained diorite intrusive containing abundant sericite alteration associated with brown iron oxide after carbonate and reddish brown hematite after pyrite. Teryl Resources' Field Exploration Discovers New Gold Zone ... by Business Wire	Brown Algae Brown and Sharpe gage Brown and Sharpe gauge Brown and Sharpe Wire Gauge brown ass brown bast Brown Bear brown blight brown blotch brown canker Brown Carpathian Cattle brown clay brown clay ironstone Brown Coal brown coat Brown County Brown County State Park Brown Deer Brown Deer Park Brown Desert-Steppe Soils brown dwarf brown fat cell brown felt blight Brown Fish Owl Brown Forest Soils Brown Hematite brown induration brown iron ore Brown Latvian Breed brown lead oxide brown leaf rust brown lignite brown lung disease brown mica brown paper bag bug brown patch brown petroleum Brown Rat brown recluse spider brown rice brown root brown root rot brown rot brown seaweed Brown Shirt Brown shirts brown smoke brown snow brown soil brown spar brown spot	Brown Eyed Woman Brown Falcon Brown Family Environmental Center brown fat brown fat brown fat brown fat cell brown fat disease brown fat tissue brown fat tissue brown fat tissue brown felt blight Brown field Brown field Brown Field Investment Brown Field Investments Brown fields Brown fields Brown fish owl Brown Fish-owl Brown forceps Brown Forest Soils Brown Gallstone Brown Gallstone Brown garden snail Brown goods Brown goods Brown Graduate Employee Organization Brown gravy Brown hair Brown Hematite Brown Heroin brown hickory Brown holland brown hyena brown hypertrophy of cere brown hypertrophy of cere brown hypertrophy of cere brown hypertrophy of the cere brown induration brown induration brown induration brown induration of the lung Brown International Young Alumni Council brown iron ore Brown Jordan International Brown Journal of World Affairs Brown Jurkowski Architectural Collaborative Brown lab Brown lab Brown lab Brown Laboratory for Linguistic Information Processing brown lacewing Brown Latvian Breed brown lead oxide Brown Leaf Area Index brown leaf rust Brown Ledge Camp brown lemming brown lick stain brown lignite

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Rock samples consisted of quartz mica schist and medium grained diorite intrusive containing abundant sericite alteration associated with brown iron oxide after carbonate and reddish brown hematite after pyrite.

Teryl Resources' Field Exploration Discovers New Gold Zone ... by Business Wire

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Brown Falcon
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brown fat tissue
brown felt blight
Brown field
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Brown Field Investments
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Brown forceps
Brown Forest Soils
Brown Gallstone
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Brown Hematite

Brown Heroin
brown hickory
Brown holland
brown hyena
brown hypertrophy of cere
brown hypertrophy of cere
brown hypertrophy of cere
brown hypertrophy of the cere
brown induration
brown induration
brown induration
brown induration of the lung
Brown International Young Alumni Council
brown iron ore
Brown Jordan International
Brown Journal of World Affairs
Brown Jurkowski Architectural Collaborative
Brown lab
Brown lab
Brown lab
Brown Laboratory for Linguistic Information Processing
brown lacewing
Brown Latvian Breed
brown lead oxide
Brown Leaf Area Index
brown leaf rust
Brown Ledge Camp
brown lemming
brown lick stain
brown lignite