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magmatic magnetite ore:

Magnetite chemistry and implications for the magmatic ...

2019-9-20 · Magnetite in the Devonian Yuleken porphyry Cu–Mo deposit located in NW China witnessed complicated magmatic-hydrothermal ore-forming processes. The magnetite grains can be divided into Mag I-A (from the Beitashan Formation basalt), Mag I-B (from the porphyritic syenite wall rock), Mag II (from sodic-calcic alteration zone), Mag III-A (from ...

Magmatic features of iron ores of the Kiruna type in Chile ...

Presence of columnar magnetite in an iron ore is suggested to be diagnostic of a magmatic origin. Platy magnetite, another dendritic form widespread at Kiruna, also occurs at El Laco. Moreover, many ores of the three provinces contain pyroxene or

The magmatic forge | Nature Geoscience

2020-9-21 · From careful characterization of fluid inclusions trapped in magnetite and apatite, Bain and colleagues 1 show that the ore-forming medium was a sediment-derived carbonate–sulfate-rich melt ...

(PDF) Magmatic iron ores and associated mineralisation ...

Magnetite-apatite ores and some associated Fe- Cu-(Au, Ag) mineralisation in northern Chile (the Toldo-Velarde deposit is situated 125 km north of Antofagasta.

Two-tiered magmatic-hydrothermal and skarn origin of ...

2018-11-1 · Working hypotheses include precipitation of magnetite from an aqueous ore fluid, which is either of magmatic-hydrothermal (Pollard, 2006), or non-magmatic hydrothermal origin (Rhodes and Oreskes, 1995, Rhodes and Oreskes, 1999, Barton and Johnson, 1996, Barton and Johnson, 2004, Haynes et al., 1995, Haynes, 2000, Sillitoe and Burrows, 2002).

Magmatic origin of giant ‘Kiruna-type’ apatite-iron-oxide ...

2013-4-10 · Nyström, J. O. & Henriquez, F. Magmatic features of iron ores of the Kiruna type in Chile and Sweden: Ore textures and magnetite geochemistry. Economic Geology 89, 820–839 (1994). Article ...

Two-tiered magmatic-hydrothermal and skarn origin of ...

The iron ore consists of a number of high grade, replacement, and magnetite orebodies with minor amounts of pyrrhotite, chalcopyrite, and pyrite indicating a large scale metasomatic transfer of iron bearing fluids during Middle Eocene magmatic activity at the KKB-VPMB.

Minerals | Free Full-Text | Magnetite Geochemistry of the ...

The Jinchuan Ni-Cu-PGE deposit is the single largest magmatic Ni-sulfide deposit in the world, with three different hypotheses on its ore-forming processes (e.g.,

Podiform magnetite ore(s) in the Sabzevar ophiolite (NE ...

2021-5-18 · Serpentinite-hosted massive magnetite ore bodies are reported for the first time in the Late Cretaceous Sabzevar ophiolitic belt, northeastern Iran. They show irregular and discontinuous shapes with variable sizes ranging from 30 to 60 cm. Chromian spinel grains are observed within both magnetite ores and host serpentinite. Magmatic chromian spinels, (Cr,Al)

Trace elements in magnetite as petrogenetic indicators ...

2014-6-10 · We have characterized the distribution of 25 trace elements in magnetite (Mg, Al, Si, P, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Sn, Hf, Ta, W, and Pb), using laser ablation ICP-MS and electron microprobe, from a variety of magmatic and hydrothermal ore-forming environments and compared them with data from the literature. We propose a new

Magmatic features of iron ores of the Kiruna type in Chile ...

Presence of columnar magnetite in an iron ore is suggested to be diagnostic of a magmatic origin. Platy magnetite, another dendritic form widespread at Kiruna, also occurs at El Laco. Moreover, many ores of the three provinces contain pyroxene or

Magnetite chemistry and implications for the magmatic ...

Magnetite from andesite at El Laco, and dacite from the nearby Láscar volcano, has high trace element concentrations typical of magmatic magnetite. El Laco ore

Magmatic iron ores - Naturhistoriska riksmuseet

2017-5-12 · The volcanic textures and structures of the ore, rather than reflecting a magmatic origin, are believed by hydrothermalists to be relict features of original volcanic rocks replaced by magnetite. The purpose of this project is to present additional evidence for a magmatic origin of magnetite-apatite ores.

(PDF) Magmatic iron ores and associated mineralisation ...

Magnetite-apatite ores and some associated Fe- Cu-(Au, Ag) mineralisation in northern Chile (the Toldo-Velarde deposit is situated 125 km north of Antofagasta.

Global Fe–O isotope correlation reveals magmatic origin of ...

2019-4-12 · Apatite-iron oxide ore is by far the biggest source of iron in Europe and one of the main iron sources worldwide 1.In Europe, these magnetite-dominated ores

Iron-rich melts, magmatic magnetite, and superheated ...

2016-6-1 · Oxygen isotopic data for the massive magnetite (δ 18 O: 4.3‰–5.0‰) and the alkali-calcic altered rock (diopside δ 18 O: 7.2‰–8.7‰; magnetite δ 18 O: 4.4‰–6.7‰) suggest that these rocks are genetically related to the host andesite (δ 18 O: 7.4‰–9.6‰). The estimated temperature of the mineral assemblage (>∼900 °C ...

Minerals | Free Full-Text | Trace Elements in Magnetite ...

Magmatic magnetite from Pagoni Rachi, similar to magmatic magnetite from intrusions related to ore deposits elsewhere, was characterized by elevated concentrations of Ti, Cr, Ni, and Sn. In contrast, high-field strength elements

Iron Isotopes and Trace Element Compositions of

2021-3-4 · The Aqishan-Yamansu metallogenic belt (AYMB) in East Tianshan hosts abundant submarine volcanic-hosted iron deposits. Although there is agreement with the magmatic source of the ore-forming materials and the role of hydrothermal replacement in iron ore formation, the mineralization processes of these iron deposits remain uncertain. Three ore types are

Magmatic Ore Deposits in Layered

2012-2-7 · Layered, ultramafic to mafic intrusions are uncommon in the geologic record, but host magmatic ore deposits containing most of the world’s economic concentrations of platinum-group elements (PGE) (figs. 1 and 2). These deposits are mined primarily for their platinum, palladium, and rhodium contents (table 1).

A fundamental role of carbonate–sulfate melts in the ...

2020-9-21 · Nyström, J. O. & Henríquez, F. Magmatic features of iron ores of the Kiruna type in Chile and Sweden: ore textures and magnetite geochemistry. Econ. Geol. 89 , 820–839 (1994).

Magnetite chemistry and implications for the magmatic ...

Magnetite from andesite at El Laco, and dacite from the nearby Láscar volcano, has high trace element concentrations typical of magmatic magnetite. El Laco ore

Magmatic Ore Deposits - GeoScienceWorld

This monograph on Magmatic Ore Deposits has resulted from a Symposium held at Stanford University on November 12 and 13, 1966. All except three of the papers that were presented are published in this volume as well as some of the discussion and the summation of the symposium.

(PDF) Magmatic features of iron ores of the Kiruna type in ...

The ore deposit consists of a magnetite-apatite massive ore that is significantly modified by late-stage metasomatic fluids that finally formed brecciated rocks within and at the margin of the ore ...

Magmatic iron ores - Naturhistoriska riksmuseet

2017-5-12 · The volcanic textures and structures of the ore, rather than reflecting a magmatic origin, are believed by hydrothermalists to be relict features of original volcanic rocks replaced by magnetite. The purpose of this project is to present additional evidence for a magmatic origin of magnetite-apatite ores.

Two-tiered magmatic-hydrothermal and skarn origin of ...

The magnetite-bearing ore is divided into two distinct types of massive and banded; the latter hosted mainly by magnesian marbles. Both subtypes of the ore bodies are associated with mineral assemblages consisting of calcite, dolomite, forsterite, tremolite-actinolite, talc, serpentine, and chlorite.

(PDF) Magmatic iron ores and associated mineralisation ...

Magnetite-apatite ores and some associated Fe- Cu-(Au, Ag) mineralisation in northern Chile (the Toldo-Velarde deposit is situated 125 km north of Antofagasta.

Minerals | Free Full-Text | Trace Elements in Magnetite ...

Magmatic magnetite from Pagoni Rachi, similar to magmatic magnetite from intrusions related to ore deposits elsewhere, was characterized by elevated concentrations of Ti, Cr, Ni, and Sn. In contrast, high-field strength elements

Iron Isotopes and Trace Element Compositions of

2021-3-4 · The Aqishan-Yamansu metallogenic belt (AYMB) in East Tianshan hosts abundant submarine volcanic-hosted iron deposits. Although there is agreement with the magmatic source of the ore-forming materials and the role of hydrothermal replacement in iron ore formation, the mineralization processes of these iron deposits remain uncertain. Three ore types are

Magmatic Ore Deposits in Layered

2012-2-7 · Layered, ultramafic to mafic intrusions are uncommon in the geologic record, but host magmatic ore deposits containing most of the world’s economic concentrations of platinum-group elements (PGE) (figs. 1 and 2). These deposits are mined primarily for their platinum, palladium, and rhodium contents (table 1).

A fundamental role of carbonate–sulfate melts in the ...

2020-9-21 · Nyström, J. O. & Henríquez, F. Magmatic features of iron ores of the Kiruna type in Chile and Sweden: ore textures and magnetite geochemistry. Econ. Geol. 89 , 820–839 (1994).