Solid-Phase Transformations of Titanomagnetite and Ilmenite …
Ore microaggregates are characterized by exsolution ((I) magnetite–ilmenite, (II) hematite–ilmenite) and replacement (martitization process) structures. The oxidizing …
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Magnetite-rutile symplectite derived from ilmenite-hematite solid
A unique symplectitic intergrowth of magnetite + rutile is hosted by ilmenite in the gabbro of the Xinjie Fe-Ti oxide-bearing, mafic-ultramafic layered intrusion. The crystallization …
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Magnetic ordering in the ilmenite-hematite solid …
Arrows illustrate the orientation of magnetic moments on each layer for pure hematite (above the Morin transition) and pure ilmenite. Note the two-layer and four-layer periodicities of the hematite and ilmenite magnetic …
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Magnetite-rutile symplectite in ilmenite records magma hydration …
Here we investigated ilmenite-hematite solid solution (Ilm ss ) relationships evident in preserved intergrowths of magnetite-rutile and ilmenite-hematite in the gabbro of the Xinjie layered …
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Magnetite-rutile symplectite in ilmenite records magma hydration …
Here we investigated ilmenitehematite solid solution (Ilm ss) relationships evident in preserved intergrowths of magnetite-rutile and ilmenite-hematite in the gabbro of the Xinjie …
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Ferromagnetism and exchange bias in compressed ilmenite-hematite …
Earth's magnetic anomalies are commonly attributed to the presence of magnetite, hematite, titanomagnetite, and pyrrhotite minerals. Magnetite (Fe 3 O 4) shows strong …
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Fe–Mg and Fe–Mn interdiffusion in ilmenite with implications for
The Fe–Mg and Fe–Mn interdiffusion coefficients for ilmenite have been determined as a function of temperature and crystallographic orientation. Diffusion annealing …
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Magnetite (mt)
All this makes possible accompanying minerals numerous, typically being hematite, goethite, maghemite, ilmenite, ulvöspinel, spinel, chromite, pyrite, chalcopyrite. Along with …
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Hematite-ilmenite (FerOr-FeTiO3) solid solutions: …
ferromagrretic ordering in hematite is parallel to the [0001] axls. Ilmenite is also antiferromagnetic. The magnetic mo-ments, however, are aligned parallel to the [0001] axis (Ishikawa et al., …
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Geochemistry of magnetite and hematite from unmineralized …
Petrographic evidence such as 1) undeveloped crystal faces of magnetite and hematite, 2) irregular boundaries of the iron oxides, 3) ilmenite replacement by magnetite, and …
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Reflected Light
Ilmenite Magnetite Millerite Pentlandite Platinum Pyrrhotite: Common / Red Brown / None in Fe-rich samples: Moderate 36-44%: Very Hard (1278-1456) Cubic: May have exsolution lamellae …
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The ilmenite/titano-magnetite assemblage: kinetics of re-equilibration
The kinetics of the reduction reactions in the two-phase region between the joins for the ilmenite-hematite and magnetite-ulvöspinel solid solution series were studied by …
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Petrological characterization of Fe–Ti oxides in metamafic rocks …
The occurrence of hematite oxyexsolution and oxidation in ilmenite and magnetite, respectively, suggests a late increase of the oxygen fugacity, which we link to the solidus …
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Textural re-equilibration, hydrothermal alteration and element
Similar to the difference between magnetite and hematite, ilmenite of MI2 assemblage generally have much lower U/Th ratios than ilmenite of MI1 assemblage. The Nb …
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Ilmenite Fe2+TiO3
Ilmenite Fe2+TiO3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal. Point Group: 3. As thick tabular crystals, with dominant base, to rhombohedral, to 25 cm. Skeletal, …
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Magnetite-rutile symplectite in ilmenite records magma …
Here we investigated ilmenite-hematite solid solution (Ilm ss) relationships evident in preserved intergrowths of magnetite-rutile and ilmenite-hematite in the gabbro of the Xinjie layered …
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Spin orientation in solid solution hematite-ilmenite
The spin orientation in synthetic hematite-ilmenite samples and in a sample of natural hematite was studied from room temperature to above the antiferromagnetic …
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Magnetization of exsolution intergrowths of hematite …
Combined electron microprobe, TEM, and X-ray diffraction (XRD) results indicate that hematite hosts reached a composition approximately ilmenite (Ilm) 14.4, and ilmenite hosts ∼Ilm 98.
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(PDF) Mineralogy and Origin of Exsolution In Ti-Rich Magnetite …
ilmenite and magnetite/hematite, are still difficult to. clearly identify in practice (Ramdohr 1953, Price. 1981, Krasnova & Krezer 1995, Charlier et al. 2007,
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Geochemistry and mineralogy of ilmenite exsolutions in …
The evolution curve of these oxides lies below the magnetite–hematite (MH) buffer curve, indicating the cooling history was dominated by magnetite (Fig. 8). Subsolidus …
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Magnetic properties of ilmenite, hematite and oilsand minerals …
The ilmenite and hematite, originating from St. Urbain, Quebec (Canada) and Hoyt Lake, Michigan (USA), respectively, were purchased from Ward's Natural Sciences Ltd. …
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Hematite | Properties, Formation, Uses, Occurrence
Association: Ilmenite, rutile, magnetite (metamorphic and igneous); goethite, siderite, lepidocrocite (sedimentary). Contents. Chemical Properties of Hematite; ... These formations consist of alternating bands of iron-rich …
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Magnetic clusters in ilmenite-hematite solid solutions
We report the use of high-field F 57 e Möss spectroscopy to resolve the magnetic ordering of ilmenite-hematite [x FeTiO 3 − (1 − x) Fe 2 O 3] solid solutions with x > …
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Ilmenite: An ore of titanium | Uses and Properties
With just a glance it can easily be confused with hematite and magnetite. The differentiation is easy. Hematite has a red streak, while ilmenite has a black streak. Magnetite is strongly magnetic, while ilmenite is not magnetic. …
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Photographs of ore types. (a) Magnetite, hematite and …
(a) Magnetite, hematite and ilmenite in massive ore; (b) Miarolitic and amygdaloidal structures filled by quartz and calcite crystals in massive ore; (c) Banded iron ore showing magnetite (black ...
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Ilmenite – Currumbin Minerals
Ilmenite is a black mineral with a submetallic to metallic luster. With just a glance it can easily be confused with hematite and magnetite. The differentiation is easy. Hematite has a red streak, …
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Intergrowths in ilmenite of the beach sands of Kerala
ilmenite, magnetite, hematite, rutile, pieotite (chrome spinel), goethite, maghemite, sphene, and leueoxene. Three different types of textures are observed, which are due to exsolution, …
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Ilménite | Physique
Ilménite un groupe tabulaire exceptionnel de grands cristaux à croissance parallèle Ilménite-magnétite par James St. John (Flickr). Ilménite, autrement appelée manaccanite, …
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Hematite | Common Minerals
Hematite will leave a red to red-brown streak on the plate, while magnetite will leave a black streak. Ilmenite: Ilmenite is a dense, black metallic mineral that can be confused with metallic hematite, but again the two mineral's streak should …
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High-temperature creep of magnetite and ilmenite single crystals
Magnetite and ilmenite often occur together in oxide-rich zones of highly differentiated igneous rocks (Ashwal 1982), while magnetite and hematite may occur together …
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Replacement of magnetite by hematite in hydrothermal
The replacement of magnetite by hematite is commonly observed in various geologic systems, especially in banded iron formations (BIF), iron oxide copper-gold deposits, …
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S.ISHIHARA MINING GEOLOGY
magnetite. Ilmenite occurs as small euhedral to subhedral crystal in mafic silicates or sub-hedral to anhedral crystals coexisting with magnetite. Hematite-ilmenite intergrowths of various ratios …
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Ilmenite
Ilmenite Mineral Description. Ilmenite is an iron-oxide mineral of the oxide and hydroxide group with structural formula (Fe,Ti) 2 O 3.The structure is similar to that of hematite, where the two …
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Magnetite exsolution in ilmenite from the Fe-Ti oxide gabbro …
Wenk et al. 2011). However, magnetite exsolution in ilmenite is more or less neglected compared with hematite exsolution in ilmenite and magnetite exsolution in silicates. This is prob-ably …
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Ilmenite, magnetite, hematite, and copper in lavas of the …
The opaque minerals in ten lava flows of the Keweenawan series of Michigan were studied microscopically by the writer. The basaltic lavas, which range in thickness from 100 to 1,400 …
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A method of tracing the temperature and oxygen-fugacity …
HISTORY OF MAGNETITE-ILMENITE GRAINS 1o5 It must also be noted that the ilmenite-hematite contours of the Buddington and Lindsley geothermometer do not diverge very much …
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The role of hematite–ilmenite solid solution in the production …
Remanent magnetization (RM) of rocks with hematite–ilmenite solid solution (HISS) minerals, at all crustal levels, may be an important contribution to magnetic anomalies measured by …
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Magnetic properties of ilmenite, hematite and oilsand minerals …
The magnetic properties and the magnetic separation behavior of ilmenite, hematite and a rutile sample (LR Rutile) produced from Athabasca oil sands tailings were studied and …
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Magnetite-rutile symplectite derived from ilmenite-hematite solid
According to Tan et al. (2015), the magnetite-rutile symplectite hosted by ilmenite from the Xinjie Fe-Ti oxide-bearing mafic-ultramafic layered intrusion (SW China) was formed …
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Chemical and petrographic characterization of ilmenite and …
determined by Wilson et al. (1996), was from hematite-rich ilmenite with minor end-member magnetite to hematite-poor ilmenite with titanomagnetite, a trend indicating progressive …
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