MAGNETITE

măgˈnətīt, lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iron ore) and is a common constituent of igneous and metamorphic rocks. It is found in Norway, Sweden, the Urals, and various parts of the United States. A variety of magnetite, lodestone (or loadstone) exhibits polarity and is especially interesting for its natural magnetism; Magnet Cove, Ark., became famous as a source.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Magnetite
We found: 581 results
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books on: Magnetite  - 308 results

       More book Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
The 23rd Cycle: Learning to Live with a Stormy Star
Book by Sten F. Odenwald; Columbia University Press, 2001
Subjects: Solar Activity--Environmental Aspects
...1978. Microscopic examination of the magnetite crystals detected inside animals as diverse...nose is suggested by the fact that the magnetite concentrations in pigeons, dolphins...researchers have also found traces of magnetite in human sinuses in much the same anatomical...
2.
McGraw-Hill Encyclopedia of Russia and the Soviet Union
Book by Michael T. Florinsky; McGraw-Hill, 1961
Subjects: Soviet Union--Encyclopedias
...dressed ores, including magnetites, with iron content exceeding 25- 30 per cent, magnetite quartzites 25-33 per cent of iron , and titano-magnetites 16-30 per cent of iron...anomaly are in the form of magnetite and ferruginous quartzites...
3.
The Rise and Fall of Civilizations: Modern Archaeological Approaches to Ancient Cultures
Book by C. C. Lamberg-Karlovsky, Jeremy A. Sabloff; Cummings Publishing, 1974
Subjects: America--Antiquities, Civilization, Ancient, Indians--Antiquities
...dimensions. Not a single fragment of magnetite was found at Barrio del Rosario; shell...valley for mineral resources, reports magnetite sources even closer to Huitzo personal...sites. The implication is that access to magnetite was not universal; ninety per cent of...
4.
Descriptive Palaeoclimatology
Book by A. E. M. Nairn; Interscience Publishers, 1961
Subjects: Paleoclimatology
...additional evidence of just such a process. Magnetite and ilmenite have been reported as the...red beds, rather than being ilmenite-magnetite-bearing source rocks, is an actively...composition of the source rock, detrital magnetite-ilmenite grains do provide an important...
5.
Ceramics for the Archaeologist
Book by Anna O. Shepard; Carnegie Institution of Washington, 1956
Subjects: Archaeology, Ceramics, Pottery
...yellowish brown; of hematite, red; and of magnetite, black. The color of the hydrous oxides...by the presence of alumina and also by magnetite. Still another change, referred to...reactive than the crystalline ones. Magnetite is formed in the first stage of reduction...
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journal articles on: Magnetite  - 163 results

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1.
Phase Equilibrium Constraints on Conditions of Granulite-facies Metamorphism at Scourie, Nw Scotland
Journal article by T. E. Johnson, R. W. White; Journal of the Geological Society, Vol. 168, 2011
Subjects: History, Metamorphic rock, Mineralogy, Minerals
...other than garnet overgrowths around magnetite in SC09/01 that are Fe-richer than...plagioclase feldspar; ilm, ilmenite; mt, magnetite; ru, rutile; liq, silicate melt...ortho- and clinopyroxene, olivine, magnetite, spinel and accessory sulphide minerals...
2.
The Tourmaline-bearing Granite Pluton of Bodmin (Cornwall, Uk): Magnetic Fabric Study and Regional Inference
Journal article by Jean Luc Bouchez, Thierry Mintsa Mi Nguema, Lionel Esteban, Roberto Siqueira, Richard Scrivener; Journal of the Geological Society, Vol. 163, 2006
Subjects: Anisotropy, Bodmin Cornwall England, Geophysics, Heat treating, Igneous rock, Magnetism, Microstructure, Minerals, Petrology, Rock deformation, Temperature effects
...iron-bearing silicates, and magnetite. This fact led to the classical...granites into ilmcnitc-tyne and magnetite-type (ishihara 1977). which...granites (Bouchez et al. 1997). In magnetite-free granites, as in the present...
3.
New Palaeomagnetic Results from the Whin Sill Complex: Evidence for a Multiple Intrusion Event and Revised Virtual Geomagnetic Poles for the Late Carboniferous for the British Isles
Journal article by D. Liss, W. H. Owens, D. H. W Hutton; Journal of the Geological Society, Vol. 161, 2004
Subjects: British Isles, Dams, Geology, Igneous rock
...coincides with the Curie temperature of pure magnetite (e.g. Dunlop Ozdemir 2001). However...mineralogy of these samples is dominated by magnetite and/or titanium-poor titanomagnetite...unblocking is again characteristic of magnetite and/or Ti-poor TM. Samples of group...
4.
Degree of Magnetic Anisotropy as a Strain Intensity Gauge in Ferromagnetic Granites
Journal article by Koushik Sen, Sukhen Majumder, Manish A. Mamtani; Journal of the Geological Society, Vol. 162, 2005
Subjects: Anisotropy, Geology, Igneous rock, Magnetism, Metamorphic rock
...as for ferromagnetic minerals such as magnetite. Borradaile Alford (1987) carried...latter, ferromagnetic minerals (e.g. magnetite) contribute to the susceptibility of...silicates because of the presence of magnetite, which has a high intrinsic susceptibility...
5.
Coalescence of Lateral Spreading Magma Ascending through Dykes: a Mechanism to Form a Granite Canopy (El Hongo Pluton, Sierras Pampeanas, Argentina)
Journal article by F. D'Eramo, L. Pinotti, J. M. Tubía, N. Vegas; Journal of the Geological Society, Vol. 163, 2006
Subjects: Geology, Magma, Rocks
...Hammarstrom 1984; Schmidt Thompson 1996). Magnetite appears as small (0.2-0.5 mm...the ferromagnetic minerals (usually magnetite). A precise knowledge of the magnetic...that ferromagnetic minerals, probably magnetite, make significant contributions to the...
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magazine articles on: Magnetite  - 42 results

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1.
Uncovering a Natural (Magnetic) Attraction Findings: a Long Walk on the Right Beach Could Reveal Magnetite Hiding in Plain Sight
Magazine article by Theodore Gray; Popular Science, Vol. 265, July 2004
...Walk on the Right Beach Could Reveal Magnetite Hiding in Plain Sight.; by Theodore...actually contain quite a bit of black magnetite, which is washed down from deposits...beaches usually contain little or no magnetite.) Hold a strong magnet an inch or two...
2.
Nanoparticles Multitask
Magazine article; Science News, Vol. 172, September 15, 2007
Subjects: Immunoassay--Product development, Magnetite--Atomic properties, Nanoparticles--Chemical properties, Nanoparticles--Research
...have now shown that nanoparticles of magnetite (Fe.sub.3O.sub.4) can play...previously unknown, the chemistry of the magnetite nanoparticles makes sense, report Sarah...Perretts team has now found, however, that magnetite nanoparticles are 40 times as effective...
3.
Rock Not Always a Hard Place
Magazine article by Lynn Margulis, Lois Brynes; Whole Earth, Fall 1999
Subjects: Bacteria, Photosynthetic--Research, Minerals--Research, Rocks--Research
...1912-1993) claimed that sedimentary magnetite was made inside living cells. His work...hunch that virtually all sedimentary magnetite derives from a bacterial invention...have internal bar magnets. How much magnetite is sequestered from the food chain and...
4.
Life on Mars: the Great Debate
Magazine article by Andrew Chaikin; Popular Science, Vol. 251, July 1997
Subjects: Extraterrestrial life, Mars, Meteors & meteorites
...crystals of the iron-oxide magnetite, which the McKay team says...previously unreported. These magnetite whiskers, say the researchers...meteorite impacts. Of the magnetites, he said, "The clear and...rocks to the structure of magnetite whiskers. And Caltechs Joe...
5.
Life on Mars, Reborn
Magazine article by Jason Daley; Popular Science, Vol. 277, July 2010
Subjects: Mars, Meteors & meteorites, Space exploration, Studies
...sustain life could have created these magnetites. Now science is again considering...ETs. In Thomas-Keprtas new magnetite study, she used a focused ion...composition, she found that the magnetites were similar to those created by...
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newspaper articles on: Magnetite  - 55 results

       More newspaper Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
1.
Council Backs Plan to Store Magnetite near Crematorium
Newspaper article; The Daily Mercury (Mackay, Australia), December 10, 2009
Subjects: Funeral industry--Planning, Magnetite--Planning
Council Backs Plan to Store Magnetite near Crematorium. Byline: Kate...hoping to appeal a decision to allow magnetite to be stockpiled on land neighbouring...lodged by Stemcor Australia to store magnetite, a metal substance used in iron...
2.
Massive Discovery Puts QLD on Iron Ore Map
Newspaper article; The Observer (Gladstone, Australia), October 6, 2010
Subjects: Magnetite--Discovery and exploration
...drilling program and the discovery of a magnetite iron ore exploration target tonnage estimated...bearing gabbro with 20-25% contained magnetite,Cyen Eastern Iron Limited technical...Cyen In a statement, the ASX said the magnetite mineralisation discovered by Eastern...
3.
Mundubbera Ore-Some; Queensland's Biggest Iron Ore Deposit Found Nearby
Newspaper article; The NewsMail (Bundaberg, Australia), October 8, 2010
Subjects: Magnetite--Discovery and exploration
...drilling program and the discovery of a magnetite iron ore,Cyen Eastern Iron Limited...bearing gabbro, with 20-25% contained magnetite. Cpounds sterlingAdditional tonnage...said. In a statement, the ASX said the magnetite mineralisation discovered by Eastern...
4.
Group Urges Black Sand Probe
Newspaper article; Manila Bulletin, June 14, 2011
Subjects: Magnetite, Marine ecosystems
...Clemente Bautista Jr. explained that magnetite, commonly called black sand, is being...been continually complaining about the magnetite mining operations that have caused destruction...violations related to the operation of the magnetite mining companies have also been reported...
5.
Review; FIRE AND ICE RLPO
Newspaper article; Liverpool Echo (Liverpool, England), October 31, 2009
Subjects: Magnetite
...Catherine Jones TWO years ago her work Magnetite opened the RLPOs Capital of Culture programme...composition. Two years ago I described Magnetite part one as "strangely beautiful and...and admire Howards vision and purpose, Magnetite isnt the easiest piece to really love...
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encyclopedia articles on: Magnetite  - 13 results

       More encyclopedia Results: 1-10 11-13 >>  
 
1.
Magnetite
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
MAGNETITE mag n tit, lustrous black, magnetic mineral, Fe 3 O 4 . It occurs in...Sweden, the Urals, and various parts of the United States. A variety of magnetite, lodestone (or loadstone) exhibits polarity and is especially interesting...
2.
Iron
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...carbonate, FeCO 3 ), taconite (an iron silicate), and magnetite (ferrous-ferric oxide, Fe 3 O 4 ), which often occurs...a chromium ore that contains iron. Lodestone is a form of magnetite that exhibits natural magnetic properties. Production and...
3.
China
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...in many parts of the country; China is one of worlds largest producers of aluminum. There are also deposits of vanadium, magnetite, copper, fluorite, nickel, asbestos, phosphate rock, pyrite, and sulfur. Coal is the single most important energy...
4.
Vysokaya
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...kaya, mountain, c.1,235 ft (380 m) high, E European Russia, in the central Urals, NW of Nizhni Tagil. It has rich magnetite deposits, which have been mined since 1721. ____________________ Copyright 2009 Columbia University Press...
5.
Paleomagnetism
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...rock paleomagnetism data was gathered. Paleomagnetism is possible because some of the minerals that make up rocks notably magnetite become permanently magnetized parallel to the earths magnetic field at the time of their formation. Rocks from hot liquid...
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