How To Use Limonite In A Sentence
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Limonite is not a mineral species as such, but rather a mixture of amorphous hydrous iron oxides.
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In the flats surrounding the veins commercial iron deposits were found as limonite that was derived from the oxidation of iron carbonates (ankerite and/or siderite).
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There are various subtypes: goethite (needle iron ore, pyrrhosiderite): a-FeO (OH), lepidocrocite (ruby glance): b-FeO (OH), limonite: (by appearance) amorphous.
6. Purifying absorbent
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In others, again, are found considerable quantities of soft powdery iron oxide or "gossan," and compounds such as limonite, aluminous clay, etc., which, under the action of the crushing mill become finely divided and float off in water as "slimes," carrying with them atoms of gold, often microscopically small.
Getting Gold: a practical treatise for prospectors, miners and students
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A novel process was developed to treat the high - aluminum limonite ores.
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In others, again, are found considerable quantities of soft powdery iron oxide or "gossan," and compounds such as limonite, aluminous clay, etc., which, under the action of the crushing mill become finely divided and float off in water as "slimes," carrying with them atoms of gold, often microscopically small.
Getting Gold: a practical treatise for prospectors, miners and students
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The walls of molds of this material are commonly lined by a thin coating of limonite.
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The quantity usually used is 5% and it has proved to be attractive for stabilizing sandy soils, clayey and silty sandy soils, soils rich in limonite (some laterites) in arid regions, and in general soils which lack cohesion.
Chapter 11
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Frank Knaus found crude 3.1-cm pyrite cubes covered with a crust of limonite.
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Although some plates are dull and stained by limonite, the clean, bright specimens are very aesthetic.
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The ore, a mixture of ‘psilomelane’ and pyrolusite with much manganiferous limonite, contains masses of cerussite.
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Picture richly wooded hill country possessing beds of limonite with New England's richest iron ore and plentiful streams with abundant mill seats.
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Cuticle was not preserved on the surfaces of the compressions, although surface features could be observed in parts of some fossils preserved as limonite petrifactions.
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The irregular topography of this bedding surface is covered by a thin veneer of micrite with limonite disseminated throughout.
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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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Australia reef gold is almost invariably associated with iron, either as oxide, as "gossan;" or ferruginous calcite, "limonite;" or granular silica, conglomerated by iron, the "ironstone" which forms the capping or outcrop of many of our reefs, and which is often rich in gold.
Getting Gold: a practical treatise for prospectors, miners and students
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Here unusually lustrous crystals to 2.5 cm across occurred in limonite-malachite gossan.
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The irregular topography of this bedding surface is covered by a thin veneer of micrite with limonite disseminated throughout.
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Some of the turquoise from their mine contains limonite intergrown with thin layers of native gold.
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Twenty specimens permineralized by limonite and pyrite were studied.
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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.
The Earth Times Online Newspaper
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The first, and highest-temperature, period is characterized by the crystallization of phlogopite and limonite on cavity walls.
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They noted that good pseudomorphs of limonite after pyrite, both as cubes and as pyritohedra, are common, especially in bodies of massive pyrite.
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Some of the cavities contain bits of iron oxides, and relatively sharp octahedra have been found on weathered pseudomorphs of limonite after pyrite.
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In the Weasel pocket, the earliest mineral to form appears to have been one of the iron-bearing carbonates that has since been oxidized to limonite.
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They hopped off across the limonite sand, forgetting the Overlord game, racing to meet the falling thing.
Covergent Series
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Sandstone of various colours was the chief material employed by the Khmers; limonite was also used.
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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It was extracted from ruddle (red ochre) and limonite
The Land of Midian
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The lower Cubagua Formation consists of gray shale with glauconite, abundant pyrite nodules, gray limonite, and some sandy intercalation with fine clastics probably carried out by turbidity currents.
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The ores in question have various local names: brown haematite (xanthosiderite), limonite, pea ore, conglomerate ore, minette (iron ooliths), sea ore, bog ore, stilpnosiderite, yellow clay ironstone, yellow ochre.
6. Purifying absorbent
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The crystals from Anglesey, which were formerly found abundantly on a matrix of dull limonite, are small in size and simple in form, being usually bounded by four faces of a prism and four faces of a dome; they are brownish-yellow in colour owing to a stain of limonite.
Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1
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Oxidation of the deposit is quite extensive, and limonite is common; therefore, although I did not observe goethite, it is probably present.
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The associated minerals are not remarkable on the specimens; only limonite and some secondary lead minerals form in the matrix.
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The phenakite is also associated with albite, limonite, smoky quartz, and topaz and is often overlooked because it resembles quartz.
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A gentle rain of infrared light bathed the limonite sands.
Covergent Series
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The contents of organic material, limonite and manganese hydroxides influence the variation of ore element.
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An oxidized zinc ore from Inner Mongolia was found to be very difficult to treat due to its features of high oxidation rate, heavy weathering and the intimate association of hemimorphite and limonite.
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Some of the turquoise from their mine contains limonite intergrown with thin layers of native gold.
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This crystal was glassy and was found associated with smoky quartz, microcline-perthite, biotite, zircon, bastnasite, and limonite after siderite.
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In others, again, are found considerable quantities of soft powdery iron oxide or "gossan," and compounds such as limonite, aluminous clay, etc., which, under the action of the crushing mill become finely divided and float off in water as "slimes," carrying with them atoms of gold, often microscopically small.
Getting Gold: a practical treatise for prospectors, miners and students
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Torres behind the city of Puerto Plata, limonite deposits at various places in Santo Domingo province, and a rich black iron oxide on the upper Ozama River.
Santo Domingo A Country with a Future
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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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Interestingly, a large house adjacent to the pits had unusual limestone flooring and deposits of limonite and ocher -- sometimes used as pigments by Southeastern groups to paint the body during rituals -- suggesting special ceremonial activities took place in this structure.
Another Surprise near Cahokia
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Some of the turquoise from their mine contains limonite intergrown with thin layers of native gold.
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The common presence of limonite suggests that there was a significant quantity of pyrite in the area prior to oxidation.
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The ores in question have various local names: brown haematite (xanthosiderite), limonite, pea ore, conglomerate ore, minette (iron ooliths), sea ore, bog ore, stilpnosiderite, yellow clay ironstone, yellow ochre.
6. Purifying absorbent
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The ore, a mixture of ‘psilomelane’ and pyrolusite with much manganiferous limonite, contains masses of cerussite.
