How To Use Magnetite In A Sentence

The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
Microscopic analyses reveal that the oxide mineralogy of the dolerites is dominated by magnetite and ilmenite.
Many of the latter are magnetite, while the others are hornblende and various ferromagnesian silicates. Aboriginal Remains in Verde Valley, Arizona Thirteenth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1891-92, Government Printing Office, Washington, 1896, pages 179-262
In some chitons, the radula has teeth tipped with magnetite, which hardens them.
In effect, magnetite does not have internal holohedral cubic symmetry, although the form faces of a crystal do appear as holohedral.

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Lodestones are simply naturally occurring magnets composed of the magnetic mineral magnetite.
Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel.
The palaeomagnetic analyses of this study have revealed that the dominant carrier of remanent magnetization of the Whin Sill dolerite is relatively pure magnetite in the pseudo-single domain size range.
The sample is composed of K-feldspar, plagioclase and quartz with accessory apatite, magnetite, titanite, zircon and secondary epidote.
The magnetite is variably altered to martite and shows a grainsize in the range 100-500um that forms 30-60% by volume of the rock. Latest News - Yahoo!7 News
Ilmenite is now largely preserved as skeletal crystals in which exsolved magnetite lamellae have been altered, and the ilmenite itself partly altered to sphene.
The water in dust removal of crushing process and the magnetite in tailings have been recovered.
The nanoparticles in question are spheres of magnetite so tiny that a few thousand of them lined up would stretch a hair's width, and they have potential uses both as the basis of better data storage systems and in biological applications such as hyperthermia treatment for cancer. Domain-b Brand Dossier
Fractionation of ferromagnesian phases such as olivine, pyroxene and magnetite must have taken place during magma emplacement, as is suggested by the low Co abundance.
Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel.
The formation of nickelous ions substituted magnetite was enhanced with a decrease in the oxygen bubbling rate.
Magnetite, apatite, titanite and zircon make up the accessory minerals.
Chemically, Strain 121's respiration process reduces ferric iron to ferrous iron and forms the mineral magnetite, the source of most of the magnetic material deposited on Earth some two billion years ago.
Some other minerals that are occasionally observed in the ore are magnetite, actinolite, rutile, the tourmaline group, chlorite group, mica group, garnet group, and iron-calcium-magnesium carbonates.
The Longqiao iron ore deposit is a large - scale hidden magnetite ore deposit.
The analysis of the iron bearing mineral compositions indicates that the major iron bearing minerals in the rocks are magnetite, maghemite, hematite, pyrite and siderite.
The "soapstone ore" is composed of magnetite grains disseminated in a soft talcose matrix. North Carolina and its Resources.
Layered intrusions commonly occur with mafic intrusions where the minerals (such as olivine, pyroxene, chromite, magnetite and plagioclase) have a wider range of specific gravity, and the magma viscosity was low.
As seen in the granite, subhedral to anhedral grains of fayalite are fractured and show varying stages of alteration to hematite, antigorite, calcite, and magnetite.
Hysteresis loop and thermal magnetic analysis sugest that ferrimagnetic minerals are primarily composed of magnetite.
Pseudomorphs of marcasite, chalcopyrite, pyrite, arsenopyrite, pyrargyrite, magnetite, and quartz after pyrrhotite have been reported.
Spinels in the country rock are essentially pure magnetite.
Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel.
Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite.
“Humans possess a tiny, shiny crystal of magnetite in the ethmoid bone, located between your eyes, just behind the nose.” Think Progress » Former President Bush Blames ‘Bloggers’ for ‘Ugly’ Political Climate
The Herbeira websterites contain diopside, enstatite, and pargasite with olivine, garnet, spinel, magnetite and ilmenite as minor phases.
Some of the characteristic minerals found in kimberlite are perovskite, magnetite, and spinel.
El Laco is an extinct volcano of pure magnetite!
The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel.
Associated with the fayalite are quartz, amphibole, and magnetite.
That finding faced the same hurdles as the finding of magnetites did: no confirmation of liquid water on or near the surface of Mars and the contention that the carbonates were formed in a superhot environment, where no life could possibly exist. First Contact
Magnetite, apatite, titanite and zircon make up the accessory minerals.
Although each mound had substantial amounts of quartz and kaolinite, minerals that reflected differences in mound material included magnetite, gypsum, hornblende, hematite, goethite, and feldspars.
Magnetite, because of its magnetism, and cordierite, because of its dichroism, were used in ancient times for navigational purposes.
Magnetite is one of several types of iron oxide and its official (IUPAC) name is Siderite, aka chalybite, is a carbonate of iron, FeCO3 Latest Articles
In the left test tube, a magnet attracts magnetite, the byproduct of Strain 121's respiration of iron oxide and offers a tell-tale sign of life in the tube.
The Herbeira websterites contain diopside, enstatite, and pargasite with olivine, garnet, spinel, magnetite and ilmenite as minor phases.
In part, the hypothesis involved tiny grains of the naturally magnetic mineral magnetite, which is commonly found in basalt (a high-temperature volcanic rock that makes up oceanic crust).
The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
Messrs. Witherbee, Sherman & Company exhibited a series of ores and concentrates from Mineville, the Arnold Mining Company, magnetites and martite from New York at the Louisiana Purchase Exposition, St. Louis 1904 Report of the New York State Commission
Other animals are also thought to navigate using magnetite.
This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
Although each mound had substantial amounts of quartz and kaolinite, minerals that reflected differences in mound material included magnetite, gypsum, hornblende, hematite, goethite, and feldspars.
The replacement of the authigenic magnetite by hematite probably occurred at the same time as the specular hematite that surrounds the dolomite grains.
The Herbeira websterites contain diopside, enstatite, and pargasite with olivine, garnet, spinel, magnetite and ilmenite as minor phases.
In addition, a mineral needed to form magnetites nonbiologically was not present in the meteorite. First Contact
The dominant carrier of remanent magnetization of the doleritic rocks is relatively pure magnetite of pseudo-single domain size, and the characteristic remanent magnetizations are typically well defined and unidirectional.
The new ‘evidence’ is tiny (one-millionth of an inch in diameter) crystals of magnetite, a magnetic oxide of iron.
Pseudomorphs of marcasite, chalcopyrite, pyrite, arsenopyrite, pyrargyrite, magnetite, and quartz after pyrrhotite have been reported.
Carriers include the iron oxides magnetite and hematite.
The Svalbard expedition has also played a role in the Mars meteorite debate because Steele and Treiman found carbonates with magnetites in them around an ancient volcano there. First Contact
Hysteresis loop and thermal magnetic analysis sugest that ferrimagnetic minerals are primarily composed of magnetite.
Hydrochloric acid, for example, with chalybite (ferrous carbonate) will give a solution of _ferrous_ chloride; with hæmatite (ferric oxide) it will yield _ferric_ chloride; and with magnetite (ferrous and ferric oxides) a mixture of ferrous and ferric chlorides. A Text-book of Assaying: For the Use of Those Connected with Mines.
Also, diamond is well known as host for a wide variety of inclusions such as graphite, magnetite, ilmenite, garnet (usually pyrope), chrome-diopside, chlorite, biotite, phlogopite, and even corundum.
The claims centre on a mineral with a high iron content called magnetite, which is found embedded in the Martian rock in an unusual form.
These minerals occur with manganoan fayalite and manganoan magnetite in a single sample.
The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
Hydrochloric acid, for example, with chalybite (ferrous carbonate) will give a solution of _ferrous_ chloride; with hæmatite (ferric oxide) it will yield _ferric_ chloride; and with magnetite (ferrous and ferric oxides) a mixture of ferrous and ferric chlorides. A Text-book of Assaying: For the Use of Those Connected with Mines.
The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
The ore consists of magnetite in a talcose gangue. North Carolina and its Resources.
This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
The outer portion of the garnets is altered to clinochlore, and small octahedral crystals of magnetite and martite occur in the schist.
The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
In the red and brown iron ores and ochres ferric iron is present; in chalybite the iron is in the ferrous state; and in magnetite it is present in both forms. A Text-book of Assaying: For the Use of Those Connected with Mines.
Minerals that remove Ti include augite and ilmenite/titanomagnetite.
The coercivity of haematite exceeds that of magnetite, and hence this technique is of little use on haematite-dominated magnetizations.
June saw them undertaking the long journey to the Glenover phosphate deposit in the Northern Province to look for apatite, monazite, pyrite, magnetite, calcite, anatase, and rutile.
On p 4066 you will find fig 12 c-d deconvolution for the size distributions of magnetites from ALH84001 and terrestrial MV-1 magnetotactic bacteria. New Findings Say Mars Methane Comes from Life or Water — or Both | Universe Today
Trade was important and again focused on the ceremonial sites: obsidian, magnetite, serpentine, and mica were among the materials acquired through exchange.
The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
Hydrochloric acid, for example, with chalybite (ferrous carbonate) will give a solution of _ferrous_ chloride; with hæmatite (ferric oxide) it will yield _ferric_ chloride; and with magnetite (ferrous and ferric oxides) a mixture of ferrous and ferric chlorides. A Text-book of Assaying: For the Use of Those Connected with Mines.
Optical and magnetic analyses have shown that the dominant carrier of remanent magnetization of the dolerite of the Whin Sill complex is relatively pure magnetite, probably resulting from deuteric oxidation of original TM.
The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
Magnetite is an energy restorer and has applications in the treatment of liver problems.
Associated with the fayalite are quartz, amphibole, and magnetite.
Chemically, Strain 121's respiration process reduces ferric iron to ferrous iron and forms the mineral magnetite, the source of most of the magnetic material deposited on Earth some two billion years ago.
The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
The company has three open-pit mines, according to the prospectus: the Kuranakh mine, now producing titanomagnetite and ilmenite concentrate, and two that will produce magnetite iron ore, one starting in 2013 and the other in 2014. Russian Miner Cuts Hong Kong IPO Plan
In essence, the researchers hold that the combination of magnetite, pyrrhotite, and carbonate could not have formed nonbiologically. The Case for Mars
Hysteresis loop and thermal magnetic analysis sugest that ferrimagnetic minerals are primarily composed of magnetite.
Placing it close enough to a magnet or placing it in a strong electromagnetic field can magnetize non - magnetized magnetite.
Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite.
Observations by Spirit show the rock contains significant amounts of the minerals olivine, pyroxene and magnetite, all of which are common in some types of volcanic rock.
The pyroxenoid occurs as granular masses of small anhedral crystals associated with manganoan magnetite.
Carriers include the iron oxides magnetite and hematite.
Chemically, Strain 121's respiration process reduces ferric iron to ferrous iron and forms the mineral magnetite, the source of most of the magnetic material deposited on Earth some two billion years ago.
After the coarse calcite was replaced by fluorite, the titaniferous magnetite rims remain as partly martitized magnetite rims around the fluorite ore pods.
The sedimentary clasts also contain abundant opaque minerals, chiefly magnetite.
Nearby is a magnet, composed of natural magnetite, that once belonged to Lomonosov.
These substances include copper, gold, antimony oxide, antimony sulphite and mica from existing mines, as well as a possibility of ilmenite and magnetite from the farm Free State north of Gravelotte. ANC Daily News Briefing
The groundmass consists mainly of bytownite with large grains of diopside and of colourless olivine, and small octahedrons of magnetite.
As seen in the granite, subhedral to anhedral grains of fayalite are fractured and show varying stages of alteration to hematite, antigorite, calcite, and magnetite.
The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
Fluorite is found as purple or green crystals to 5 mm on edge and as anhedral masses in magnetite/hematite.
Although such grains would have low Curie points of c.250 deg C they invariably undergo subsolidus exsolution during magmatic, deuteric and/or hydrothermal stages of cooling to produce ilmenite lamellae hosted by Ti-poor magnetite.
The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
The magnetite, uralite, and other minerals can be exposed by etching away the enclosing calcite with hydrochloric acid.
More important, because the presence of magnetite gives the basalt measurable magnetic properties, these newly discovered magnetic variations provided another means to study the deep ocean floor.
Treiman later told me: “Would any reasonable person conclude that there was life on Mars based on the proportion of magnesium in submicron grains of magnetite?” First Contact
Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite.
Accessory chlorite, magnetite or ilmenite, titanite, apatite, partly chloritized biotite, epidote, pyrite and sometimes cummingtonite, are present.
In addition, magnetites, like so many possible microscopic signs that living organisms once were present, can also be formed through nonbiological processes, and at least eight substantial papers have been written arguing for a range of origins that had nothing to do with life. First Contact

How To Use Magnetite In A Sentence

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