How To Use Hematite In A Sentence
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Mineral process of hematite in the early time often adopted gravity separation, and it mainly included jig, centrifugal separator, spiral chute, spiral concentrator, shaking table and so on.
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The Lake Superior iron formations now consist near the surface mainly of interbanded quartz (or chert) and hematite, called _jasper_ or _ferruginous chert_ or _taconite_.
The Economic Aspect of Geology
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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The color of the dots was made from a mixture of hematite and red hematite which was then mixed with calciferous drops of water from the caves, according to excavation technician Maria Malina.
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The fluids that precipitated the veins were a likely source for some of the iron that formed the hematite.
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Tiny crystals of hematite, goethite, chalcopyrite, marcasite, and dolomite are common and make excellent micromounts.
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The Stephen Webster Silver Collection is made from sterling silver, 18-karat gold and gemstones such as jade, chalcedony, goldstone, hematite and white agate.
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This was a steely gray specimen of the mineral hematite which, like many other stones, has a tradition of healing and additional magical influences.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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The ironstone is locally represented by hematite matrix-supported vein quartz breccia.
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I have always regarded specular hematite as a micaceous or platy form that would be very difficult to fashion into beads.
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Connected through his hematite, he could tell that there was some sunstone antimagic about, but it was nothing substantial out here, beyond the gate, and certainly nothing that would inhibit the power of King Aydrian.
Immortalis
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Gray hematite more quietly occupies the rims of hot springs and geysers where its presence often goes unnoticed.
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The partial inclusions of hematite take the form of microscopic rosettes of thin, splendent blue-black plates (pers. observation).
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Even if the hematite's origin remains ambiguous, trace amounts of other minerals could serve as additional markers of past water.
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Some representative oxide minerals include corundum, cuprite, and hematite.
Composition of rocks
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Both areas were selected because they have an ancient layer of hematite, an iron oxide mineral that on Earth almost always forms in an aqueous environment.
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Iron was remobilized and limned specular hematite, along with epidote, actinolite/tremolite, and andradite.
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Tiny crystals of hematite, goethite, chalcopyrite, marcasite, and dolomite are common and make excellent micromounts.
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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.
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Among the simple oxides, only anatase and hematite have been found to date.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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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.
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Some samples have hematite in the calcite veins.
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Alteration is characterized by carbonates and fuchsite in ultramafic rocks and by hematite in dykes.
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He wears a top hat and coat-tails, and white spats on shoes the color of Alaskan hematite.
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Some hematite replacement erases all traces of the original mineralogy.
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In Cherokee the hematite ores outcrop in immense quantities along the Hiawassee and Valley rivers, and, when wrought in the commonest county bloomeries, have yielded an astonishing per cent.
The Great South; A Record of Journeys in Louisiana, Texas, the Indian Territory, Missouri, Arkansas, Mississippi, Alabama, Georgia, Florida, South Carolina, North Carolina, Kentucky, Tennessee, Virginia, West Virginia, and Maryland
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The lakebed is believed to contain hematite, a crystalline iron compound usually formed in the presence of water.
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The original condition is indicated by the facts that deep below the surface, in zones protected from weathering solutions, siderite and greenalite are abundant, and that they show complete gradation to hematite in approaching the surface.
The Economic Aspect of Geology
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The red sandstone is made up of quartz grains coated with hematite, an iron oxide mineral that gives the stone a red colour.
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There will be azurite, pyromorphite, marvelous twinned calcite, stibnite that rivals that from Japan, stibiconite, scheelite, hematite with lightly tinted quartz, cinnabar, hemimorphite, and a range of other colorful minerals.
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The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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The fluids that precipitated the veins were a likely source for some of the iron that formed the hematite.
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Like hematite, some goethite is pseudomorphic after a rhombohedral carbonate mineral.
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At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet.
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According to Li, this month, their excavation team found from the soil strata dating back 15,000 years, or the late Paleolithic Era, at the Xuchang ruins more than 20 pieces of hematite, one of iron oxides commonly used as a dyestuff, alongside three dozen thin instruments made of animal tooth enamel, plus seven needles made of the upper cheek tooth enamel of a rhinoceros sub-species now extinct.
Red - CCC (Color of Choice for Cavemen)
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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.
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“Many people have assumed that the hematite in ancient rocks formed by the oxidation of siderite in the modern atmosphere,” said Hiroshi Ohmoto, professor of geochemistry, Penn State.
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Like hematite, some goethite is pseudomorphic after a rhombohedral carbonate mineral.
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Among the simple oxides, only anatase and hematite have been found to date.
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Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals.
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Under weathering conditions pyrite oxidizes, the sulphur forming sulphuric acid, -- an important agent in the secondary enrichment of copper and other sulphides, -- and the iron forming the minerals hematite and limonite in the shape of a "gossan" or "iron-cap.
The Economic Aspect of Geology
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For processing fine, feebly magnetic minerals, such as hematite, limonite, ilmenite, wolframite, tantalumniobium, red sludge and etc.
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It consists mostly of ‘jaspilite,’ an unofficial term connoting rock with highly folded, alternating bands of black hematite and red jasper.
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The ironstone is locally represented by hematite matrix-supported vein quartz breccia.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
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The red sandstone is made up of quartz grains coated with hematite, an iron oxide mineral that gives the stone a red colour.
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The resinous glow of fire and candles mingled along the edges of the Five Mystical Forms carved from polished hematite, objects of mathematical meditation which had become semisacred to one of the more crackpot schools of dog wizardry and gave a queer life to the statues of the twenty-one Old Gods, lurking like watchers among the books of what had once been their faith.
The Silicon Mage
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This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
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Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals.
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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.
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The replacement of the authigenic magnetite by hematite probably occurred at the same time as the specular hematite that surrounds the dolomite grains.
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The Badger Flats area is also well known for clinozoisite, garnet, hematite, scheelite, vesuvianite, wollastonite, and zoisite (variety thulite).
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This was a steely gray specimen of the mineral hematite which, like many other stones, has a tradition of healing and additional magical influences.
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Carriers include the iron oxides magnetite and hematite.
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The hematite and the clays appear intergrown, suggesting that they co-precipitated.
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He mentions that the amazonite occurred in association with orthoclase (almost certainly microcline), smoky quartz, specular hematite, and rare anhydrite.
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Sandstones with this component contain authigenic hematite intergrown with kaolinite and illite and replacing muscovite.
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The hematite could have formed from iron-rich materials in the original layers of sediment, or it could have been deposited from iron-rich water percolating through the sediments.
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The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
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An increasingly important source of iron for commercial uses is taconite, a mixture of hematite and silica.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
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Some samples have hematite in the calcite veins.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
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The lakebed is believed to contain hematite, a crystalline iron compound usually formed in the presence of water.
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He informed us all about internal fires and tertiary formations; about äeriforms, fluidiforms, and solidiforms; about quartz and marl; about schist and schorl; about gypsum and trap; about talc and calc; about blende and horn-blende; about mica-slate and pudding-stone; about cyanite and lepidolite; about hematite and tremolite; about antimony and calcedony; about manganese and whatever you please.
Tales.
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The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.
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The crystals have a typical pseudo-octahedral habit, often with composite crystal faces, and are typically associated with red andradite, hematite, calcite, gaudefroyite, barite. kutnohorite, celestine, or even sturmanite.
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For each, there are several kinds of geologic concentrations that represent actual or potential resources; consequently, for each we may expect the depletion history to consist of a series of production-history curves, as availability and cost dictate a steplike descent from high-grade hematite to taconite to iron-rich intrusive bodies, and from bauxite to alunite to high-alumina clays.
Limits to Exploitation of Nonrenewable Resources (historical)
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This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite.
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Brookite is best known from alpine-cleft-type occurrences, where it is round with anatase, rutile, titanite, quartz, adularia, albite, hematite, calcite, and chlorite.
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Minor hematite gives some specimens a red color.
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Allochems (peloids, oolites) with oncolites & intercolumnal detritus, anthraxolite (dark), chert & chalcedony (matrix), hematite (red), ankerite (white/light colored rhombohedra), algal laminae are all visible in image.
Stromatolites - The Panda's Thumb
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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Also, white barite crystals stained red by hematite can be found in the walls of the old pit, and cryptomelane as matted fibers often occurs with manganite crystals in quartz veins.
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A spectrometer on MGS revealed a large deposit of hematite in the heavily cratered highlands.
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The Badger Flats area is also well known for clinozoisite, garnet, hematite, scheelite, vesuvianite, wollastonite, and zoisite (variety thulite).
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Both areas were selected because they have an ancient layer of hematite, an iron oxide mineral that on Earth almost always forms in an aqueous environment.
-
Even if the hematite's origin remains ambiguous, trace amounts of other minerals could serve as additional markers of past water.
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Carriers include the iron oxides magnetite and hematite.
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He informed us all about internal fires and tertiary formations; about äeriforms, fluidiforms, and solidiforms; about quartz and marl; about schist and schorl; about gypsum and trap; about talc and calc; about blende and horn-blende; about mica-slate and pudding-stone; about cyanite and lepidolite; about hematite and tremolite; about antimony and calcedony; about manganese and whatever you please.
Tales.
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“If hematite were formed by the oxidation of siderite at any time, the hematite would be found on the outside of the siderite, but it is found inside,” he reported in a recent issue of Nature Geoscience.
Deep-sea Rocks Point To Early Oxygen On Earth | Impact Lab
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In this specimen, limonite (an iron oxide) contributes to the bright central arc, while fine spherules of hematite (another iron oxide) suffuse the quartz with a purplish hue.
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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.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
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Minor hematite gives some specimens a red color.
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Fluorite is found as purple or green crystals to 5 mm on edge and as anhedral masses in magnetite/hematite.
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He wears a top hat and coat-tails, and white spats on shoes the color of Alaskan hematite.
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The early diagenetic precipitation of hematite and calcite took place during subaerial exposure and are the results of caliche and palaeosol formation.
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The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas.
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From 176 to 180 feet, samples indicated limonite-jarosite and hematite in the matrix material and it is believed that this zone could also offer gold mineralization.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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Some hematite replacement erases all traces of the original mineralogy.
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The selective depression of ammonium fluorosilicate on aegirite, an iron-containing silicate gangue mineral, in hematite flotation using sodium oleate collector was investigated.
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The fluids that precipitated the veins were a likely source for some of the iron that formed the hematite.
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In the extreme eastern portion of Ashe county the gossan ores (brown hematite) of the Ore Knob copper lode, bear mention.
North Carolina and its Resources.
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In this case, the loss involved the drilling mud (water and clay with dense additives such as barite or hematite) that we've all heard so much about.
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