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magnetite
magnetite
magnetite (loadstone, lodestone) An important rock-forming iron
oxide Fe
2+Fe
3+2O
4 (FeO.Fe
2O
3) and member of the
spinel group of
minerals; belongs to the magnetite series along with magnesioferrite (MgFe
3+2O
4),
franklinite, jacobsite (MnFe
3+2O
4), and trevorite (NiFe
3+2O
4); sp. gr. 5.2 (to 4.6);
hardness 5.5–6.5;
cubic; normally iron-black with a blue tarnish; black streak;
sub-metallic lustre; crystals often
octahedral and
rhombdodecahedral, but it is also
massive and granular;
cleavage poor, octahedral; strongly magnetic; found extensively in magmatic rocks associated with
basic rocks, in
pegmatites, in contact
metasomatic zones (especially in
limestones in regionally metamorphosed rocks due to the dehydration of iron hydroxides), and also in black sands associated with gold gravels.
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Magnetite: Zinc Corporation of America Mine No. 4, St. Lawrence County, New York.(CONNOISSEUR'S CHOICE)
Magazine article from: Rocks & Minerals; 5/1/2008; ; 700+ words
; ...early attempts to produce iron were from magnetite occurrences, some of which were the...many small iron furnaces that exploited magnetite ores. Interestingly, some of the most spectacular magnetite specimens to be found in the United States...
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Asia Now Finds Up to 14.1 g/t Gold in Residual Magnetite at Beiya.
News Wire article from: Canadian Corporate News; 11/28/2007; 700+ words
; ...assay results from samples of residual magnetite collected from its Beiya property in...Yang. All of the 58 samples of coarse magnetite were collected from the residual soil...thickness of residual soil that contains magnetite debris (described as magnetite bullets...
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Aurox Resources (ASX:AXO) and FLSmidth Minerals (XCSE.FL) Commence First Phase of Magnetite Project Construction at Balla Balla
News Wire article from: abnnewswire.net; 2/15/2008; ; 700+ words
; ...commission the six million tpa Balla Balla magnetite concentrate processing plant and related...Aurox is on track to become WA's first magnetite iron ore producer from the low cost Balla...3.5 billion euros. The Balla Balla Magnetite Project Aurox Resources Limited (ASX...
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Manipulating natural magnetite in bacteria.(Information technology)
Magazine article from: Chemistry and Industry; 10/4/2004; ; 700+ words
; ...manipulating the production of natural magnetite in bacteria for the first time--an...in the bacteria, but we know that the magnetite coming out the other end is magnetically...bacteria produce tiny magnetic particles of magnetite ([Fe.sub.3][O.sub.4...
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Fitch Ratings Affirms Magnetite IV CLO, Ltd.
Business Wire; 10/17/2006; 700+ words
; ...Ratings affirms six classes of notes issued by Magnetite IV CLO, Ltd., (Magnetite IV). These affirmations are the result of Fitch...combination securities affirmed at 'BBB'. Magnetite IV is a collateralized loan obligation (CLO...
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Macarthur Minerals Limited: Lake Giles Magnetite Project Update.
News Wire article from: Canadian Corporate News; 8/31/2006; 700+ words
; ...LGRC_010 intersects 150 of visible magnetite - Drill hole LGRC_011 intersects 104m of visible magnetite - Strike extension of mineralised BIF...Phase 1 samples LGRC_001 and LGRC_002 magnetite ore at the Ambdel laboratories in Adelaide...
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Baotou Steel to buy into Aussie magnetite project for $34.9 mln.
Newspaper article from: China Business News; 9/26/2007; 647 words
; Baotou Steel to buy into Aussie magnetite project for $34.9 mln Shanghai. September...9 million) into Centrex's Bungalow magnetite deposit in return for a stake in the...Group will earn a 50 percent stake in the magnetite deposit through a joint venture. The...
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Fitch Affirms 6 Classes of Magnetite Asset Investors III L.L.C./Magnetite Asset Investors III Corp.
Business Wire; 10/13/2006; 700+ words
; ...Ratings affirms six classes of notes issued by Magnetite Asset Investors III L.L.C./Magnetite Asset Investors III Corp. These affirmations...3,000,000 class E notes at 'B+'. Magnetite Asset Investors III L.L.C. is a market...
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Macarthur Minerals Limited: Potential Magnetite Iron Ore Project Lake Giles, Western Australia Project Update
Newspaper article from: CCNMatthews Newswire; 5/8/2007; 700+ words
; ...at its 100% owned 1155 km2 Lake Giles magnetite iron ore and base metals project in Western...and 5.98% Si02 - Scoping study on magnetite project due June 07 - Initial JORC resource...province is not a significant producer of magnetite at this time but there exists a number...
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Fitch Affirms Six Classes Of Magnetite Asset Investors L.L.C.
Business Wire; 12/17/2004; 700+ words
; ...YORK -- Fitch Ratings affirms six classes of Magnetite Asset Investors L.L.C. (Magnetite). The following rating actions are effective...junior subordinated secured notes 'B+'. Magnetite is a market value collateralized debt obligation...
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magnetite
Book article from: A Dictionary of Earth Sciences
magnetite ( loadstone , lodestone ) An important rock-forming iron oxide Fe 2...Fe 2 O 3 ) and member of the spinel group of minerals ; belongs to the magnetite series along with magnesioferrite (MgFe 3+ 2 O 4 ), franklinite , jacobsite...
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palaeoclimate and magnetism
Book article from: The Oxford Companion to the Earth
...assemblages preserved within the sediment. Magnetite grains of volcanic origin are typically...within other mineral grains. Bacterial magnetite, produced by magnetotactic bacteria...from high-level transport of ultrafine magnetite from distant sources. A constant rate...
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redox equilibria
Book article from: The Oxford Companion to the Earth
...deduced from mineralogical studies of magnetite (Fe 3 O 4 )–ilmenite (FeTiO...the fayalite (Fe 2 SiO 4 )–magnetite (Fe 3 O 4 )–quartz (SiO...obtained by methods that are independent of magnetite or volcanic gas, however, point to...
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Mapping Techniques
Book article from: World of Earth Science
...the amount of magnetic minerals such as magnetite it contains. Some rock types (e.g...banded iron formations ) have a high magnetite content and create magnetic highs. Other rocks low in magnetite (such as quartzite and shale) produce...
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Magnet
Book article from: How Products Are Made
...any outside influence. The iron ore magnetite, also known as lodestone, is a natural...Materials Permanent magnet lodestones contain magnetite, a hard, crystalline iron ferrite mineral...5 and 17 times the magnetic force of magnetite. Ceramic permanent magnets are made...
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