(PDF) Magnetite-Apatite Deposits at El Laco, Chile
A prominent. example is the 'magnetite lava flows' at El Laco, a ~3 Myr. o ld andesitic arc volcano in the Central Volcanic Zone, Northern Chile. The deposits are well known for their striking ...
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The Magmatic to Magmatic-Hydrothermal Evolution of the El Laco Deposit
The geology and geochemistry of the El Laco iron oxide deposit (Central Andes, Chile) support a genesis related to the ascent, degassing, and subvolcanic emplacement of an unusual oxidized silica-poor but water-and iron-rich melt that took place during the growth of the host Pliocene-Holocene andesitic volcano.
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The Geochemistry of Magnetite and Apatite from the El Laco …
The textures of outcrop and near-surface exposures of the massive magnetite orebodies (>90 vol % magnetite) at the Plio-Pleistocene El Laco iron oxide …
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The Montecristo mining district, northern Chile: the
The Montecristo district, northern Chile, is one of the few places worldwide where there is a direct relationship between magnetite-(apatite) (MtAp) mineralization and iron oxide-copper–gold (IOCG) mineralization. The MtAp mineralization includes Ti-poor magnetite, fluorapatite, and actinolite and is crosscut and partially replaced by a …
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Immiscible iron- and silica-rich melts and magnetite
Data are also shown for the Plio-Pleistocene El Laco magnetite -apatite deposit, Chile(Weis 2013;Bilenker et al. 2016), for which magmatic Velasco et al. 2016) and magmatic-hydrothermal genetic ...
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The Geochemistry of Magnetite and Apatite from the El …
The textures of outcrop and near-surface exposures of the massive magnetite orebodies (>90 vol % magnetite) at the Plio-Pleistocene El Laco iron oxide-apatite (IOA) deposit in northern Chile are similar to basaltic lava flows and have compositions that overlap high- and low-temperature hydrothermal magnetite. Existing …
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Vanadium Resources in Titaniferous Magnetite Deposits
VANADIUM RESOURCES IN TITANIFEROUS MAGNETITE DEPOSITS BY R. p. FISCHER ABSTRACT Titaniferous magnetite deposits are magmatic accumulations of magnetite and ilmenite. They commonly contain 0.2 to 1 percent V 2 0 5, most of which is concentrated in the magnetite, and they have become the world's principal source of …
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Mineral chemistry of magnetite from magnetite-apatite
Some later studies focused on the magnetite-apatite ores at El Laco in the Atacama desert region of northern Chile, a much younger deposit, which is often considered a modern and shallow (i.e., Pliocene-Holocene) equivalent of the magnetite-apatite deposits found at Kiruna (e.g., Park 1961; Nyström and Henríquez 1994; …
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Geochemistry of magnetite in beach sands, stream …
The average magnetite compositions of beach and river samples were substantially similar to those of andesite rocks, revealing that the magnetite samples …
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The Geochemistry of Magnetite and Apatite from the El …
The Geochemistry of Magnetite and Apatite from the El Laco Iron Oxide-Apatite Deposit, Chile: Implications for Ore Genesis Nikita L. La Cruz,1,2,† J. Tomás Ovalle,3,4 Adam C. Simon,1 Brian A. Konecke,1,5 Fernando Barra,3,4 Martin Reich,3,4 Mathieu Leisen,3,4 and Tristan M. Childress1 1Department of Earth and Environmental …
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Formation of magnetite-(apatite) systems by crystallizing
Magnetite-(apatite) ore deposits are interpreted as being formed by the crystallization of iron-rich ultrabasic melts, dominantly generated by the interaction of silicate melts with oxidized P-F-SO4-bearing sedimentary rocks. This hypothesis is supported by geologic evidence, experimental studies, numerical modeling, stable and radiogenic …
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Magnetite | Common Minerals
Magnetite is a black, opaque, magnetic mineral that leaves a black streak when rubbed across a hard rough surface. It is one of the most abundant metal oxides, and its crystal structure contains both the ferrous (Fe+2) and ferric (Fe+3) forms of iron ions. A complex pattern of electrons between the two forms of iron is the source of its ...
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The Montecristo mining district, northern Chile: the …
1024 Mineralium Deposita (2023) 58:1023 1049 1 3 the abundance of iron oxides and are associated with cal-cic-iron-alkali alteration. The largest deposit on Earth is the
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Tracking isotopic sources of immiscible melts at the …
The long-standing controversy about the origin of magnetite-(apatite) mineral deposits pertains to how they form. The Pleistocene El Laco deposit in northern Chile is a critical location because the host andesite contains immiscible melt inclusions trapped in plagioclase and clinopyroxene phenocrysts that reveal the involvement of …
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Geochemistry of magnetite from porphyry Cu and skarn deposits …
A combination of petrographic observations, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and statistical data exploration was used in this study to determine compositional variations in hydrothermal and igneous magnetite from five porphyry Cu–Mo and skarn deposits in the southwestern United States, and …
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Mineral chemistry of magnetite from magnetite …
63 Citations. Explore all metrics. Abstract. Interpretation of the mineralizing environment of magnetite-apatite deposits remains controversial with theories that …
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Immiscible iron- and silica-rich melts and magnetite …
DOI: 10.1016/J.OREGEOREV.2016.06.007 Corpus ID: 132237126; Immiscible iron- and silica-rich melts and magnetite geochemistry at the El Laco volcano (northern Chile): Evidence for a magmatic origin for the magnetite deposits
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Formation of massive iron deposits linked to explosive volcanic
The Magmatic to Magmatic-Hydrothermal Evolution of the El Laco Deposit (Chile) and Its Implications for the Genesis of Magnetite-Apatite Deposits. Econ. Geol 112, 1595–1628 (2017).
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(PDF) Formation of iron oxide–apatite deposits
This Review explores the hydrothermal, magmatic and tectonic conditions required to efficiently enrich iron-rich minerals in the upper crust. Iron oxide–apatite deposits can form from purely ...
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sbm/sbm magnetite mineral mining in chile.md at main
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MAGNETITE, APATITE, TITANITE, AND ACTINOLITE …
We propose that the δ18O and δ⁵⁶Fe data for the Pea Ridge and Pilot Knob magnetite-apatite deposits are consistent with the flotation model recently proposed by Knipping et al. (2015a ...
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Iron-rich melts, magmatic magnetite, and superheated …
Iron-rich melts, magmatic magnetite, and superheated hydrothermal systems: The El Laco deposit, Chile. Fernando Tornos; Francisco Velasco; John M. Hanchar. …
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Immiscible iron- and silica-rich melts and magnetite geochemistry …
The largest magnetite orebodies occur in a semicircle around the volcanic plug (Fig. 1) and include dome- or cone-like edifices, with volcaniclastic aprons, and possibly what were once lava lake deposits.The magnetite shows a wide variety of textures with different degrees of vesicularity; locally and in their base, the orebodies …
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A review of magnetite geochemistry of Chilean iron …
Highlights. Magnetite can be used as a tracer of the geological environment of ore formation and as a fingerprint of the source reservoir of iron. Chilean IOA deposits …
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The Montecristo mining district, northern Chile: the
(2018) to the giant IOCG deposits of Mantoverde and Punta del Cobre in Chile. At the dominantly stratabound deposits in the Punta del Cobre district (which includes the Punta del Cobre and Candelaria deposits, among others), there are large bodies of apatite-poor massive magnetite and only sparse veins that could be unambiguously assigned to the
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Trace element geochemistry of magnetite from the …
are mostly magnetite-rich deposits with abundant actinolite, minor hematite (martite), and apatite, and are mined for their iron ore. In the Chilean Iron Belt, these deposits were mostly Fig. 1 Map showing the location of the Cerro Negro Norte IOA deposit within the Coastal Cordillera of northern Chile. Other ore deposits from the
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Unveiling the effect of magnetite on the synergistic action of deposits …
The synergistic corrosion effect of microorganisms and deposits on carbon steel corrosion was assessed with magnetite and sand. In the presence of the microbial consortium with magnetite, uniform corrosion rates were 3.5 times higher (0.611 mm/year) than the sum of the corrosion rates promoted by the consortium and deposit separately (0.056 and 0.110 …
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Genetic model of the El Laco magnetite-apatite deposits by …
Magnetite-apatite deposits are important sources of iron and other metals. A prominent example are the magnetite lavas at the El Laco volcano, Northern Chile. Their formation processes remain debated.
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Ubiquitous magnetite | Nature Geoscience
Magnetite is a mixed iron(II)/iron(III) oxide and its magnetism, hardness, density and catalytic properties combine to generate its importance.Massive deposits of magnetite were formed around 2 ...
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Immiscible iron- and silica-rich melts and magnetite …
Volume 79, December 2016, Pages 346-366. Immiscible iron- and silica-rich melts and magnetite geochemistry at the El Laco volcano (northern Chile): Evidence for a …
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