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Evolution of Cu-Au porphyry to Low Sulfidation Epithermal

EVOLUTION OF PORPHYRY COPPER-GOLD TO LOW SULFIDATION EPITHERMAL GOLD MINERALIZATION MARICUNGA BELT, NORTHERN CHILE MUNTEAN, John L., and EINAUDI, Marco T., Maricunga porphyry gold deposits are located in Miocene subvolcanic andesitic to dacitic intrusive centers. Gold is closely associated with quartz veinlets that are mostly <0.5mm in width.

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Magnetite Iron Ore Chile, Nickel Minerals, Zinc & Lead

Magnetite Iron Ore Chile, Nickel Minerals, Zinc & Lead Minerals, Ady Resources Magnetite Iron Ore Chile, Nickel Minerals, Zinc & Lead Minerals, Ady Resources Admiralty Resources NL is a diversified mining company with Magnetite Iron Ore Chile, Nickel Minerals, Zinc & Lead Minerals interests in Australia & Chile.

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baro acoustic decrepitation of magnetite at el laco iron

El Laco iron deposit, Chile. The El Laco deposit is an unusual magnetite deposit high in the Andes in Chile. Some consider it to be a volcanogenic extrusive massive magnetite flow. But many others consider it to be an alteration deposit, some sort of high level skarn-like

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PorterGeo Database Ore Deposit Description

The El Laco magnetite-apatite deposits (listed below) are exposed at altitudes between 4700 to 5300 m on the flanks of El Laco, a calc-alkaline volcanic complex in the Central Andes of northern Chile, 300 km east of Antofagasta, near the Argentine border (#Location 23° 49' 7"S, 67° 29' 58"W).

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Trace elements in magnetite from massive iron oxide

@inproceedings{Knipping2015TraceEI, title={Trace elements in magnetite from massive iron oxide-apatite deposits indicate a combined formation by igneous and magmatic-hydrothermal processes}, author={Jaayke L. Knipping and Laura Danielle Bilenker and Adam Simon and Martin Reich and Fernando Barra and

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Iron Oxide Breccias & Veins Mineral Deposit Profiles, B

Magnetite lavas and feeder dikes exist on the El Laco volcano in Chile. . DEPOSIT FORM Discordant pod-like zones, veins (dike-like), tabular bodies and stockworks; in some deposits dikes are overlain by Fe oxide tuffs and flows.

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Magnetite spherules in pyroclastic iron ore at El Laco

The El Laco iron deposits in northern Chile consist of magnetite (or martite) and minor hematite, pyroxene, and apatite. The orebodies are situated on a volcanic complex and resemble lavas and pyroclastic deposits, but a magmatic origin is rejected by some geologists who regard the ores as products of hydrothermal replacement of volcanic rocks.

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What Are The Biggest Industries In Chile? WorldAtlas

What Are The Biggest Industries In Chile? Fish processing, iron, and steel are some of Chile's biggest industries. Agriculture plays a significant role in the economy of Chile. The country has huge deposits of copper and Chile is now known as the world capital of copper mining. The country accounts for a third of the world output of copper.

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Minerals Free Full-Text Silician Magnetite from the

The Copiapó Nordeste IOCG deposit, with its abundant massive magnetite ores, is a new prospect in Northern Chile. These ores show a variety of modes of occurrence and textures, including martitization and pseudomorphic magnetite (mushketovite).

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[] ORIGIN OF CHOGHART IRON OXIDE DEPOSIT, BAFQ

The origin of the Proterozoic Choghart iron oxide deposit in the Bafq mining district of Central Iran has been the subject of a long-standing dispute. Some authors believe that it was formed from magma, while others suggest metasomatic replacement of preexisting rocks. The present study on the basis of new oxygen isotope, REE and geochemical data concludes that neither of these two hypotheses

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Capstone Mining Corp. Operations Santo Domingo

The Santo Domingo Project is located 50 kilometres southwest of Codelco's El Salvador copper mine and 130 kilometres north-northeast of Copiapó, near the town of Diego de Almagro in Region III, Chile. Elevation at the site ranges from 1,000 to 1,280 metres above

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Magnetite spherules in pyroclastic iron ore at El Laco,

The El Laco iron deposits in northern Chile consist of magnetite (or martite) and minor hematite, pyroxene, and apatite. The orebodies are situated on a volcanic complex and resemble lavas and pyro-clastic deposits, but a magmatic origin is rejected by some geologists who regard the ores as products of hydrothermal replacement of volcanic rocks.

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Oxygen isotope composition of magnetite in iron ores of

Magnetite-apatite iron ores of the Kiruna type, unaffected by deformation, have structures and textures similar to those of igneous rocks. The best examples are the El Laco deposits in northern Chile which resemble lava flows, pyroclastic deposits and dikes. El Laco magnetites have d18O values between 2.3 and 4.2‰ (V-SMOW). Magnetite from ore with a magmatic texture has a mean of 3.7‰, and

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The tiny magnetite compass in the human nose

Stephen Juan, an anthropologist from the University of Sydney answers Lee Staniforth of Manchester, UK question, "Do humans have a compass in their nose?" He writes about some scientists at California Institute of Technology discovered that humans possess a tiny, shiny crystal of magnetite in the ethmoid (pink to the image on your

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Magnetite bombs at El Laco volcano, Chile GFF Vol 120,

The origin of apatite iron ores of the Kiruna type remains controversial, especially the formation of almost pure magnetite that constitutes large parts of major deposits. The best preserved ores of this type occur on the flanks of El Laco, a Plio-Pleistocene volcano in the Chilean Andes.

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Characterisation of Magnetite Iron Ore AusIMM

A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts. Chilean magnetite iron ore deposits within the Atacama Desert have also formed alluvial accumulations of magnetite in

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Did the massive magnetite "lava flows" of El Laco (Chile

The El Laco magnetite deposits consist of more than 98 % magnetite but show field textures remarkably similar to mafic lava flows. Therefore, it has long been suggested that they represent a rare example of an effusive Fe oxide liquid. Field and petrographic evidence, however, suggest that the magnetite deposits represent replacement of andesite flows and that the textures are

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Nelsonite and Kiruna-type Deposits

we find iron oxides (ilmenite, magnetite, or hematite) and apatite as the major constituents. There are several differ-ent types of rocks with this basic mineralogy, including nelsonites and Kiruna-type deposits. The former is named for an unusual deposit in Nelson County, Virginia, and the lat-ter for the Kiruna district in northern Sweden.

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Magnetite-Cu-Au Deposits in Deeply Eroded Magmatic Arcs

Magnetite deposits with distinctive ± actinolite ± apatitebearing gangue and spatially-extensive sodic-calcic wall rock alteration occur in both Proterozoic metamorphic terrains and Mesozoic-Tertiary magmatic arcs. Examples from both settings constitute significant sources of iron ore (e.g. Kiruna, Sweden; El Romeral, Chile) and some host major Cu-Au deposits that have a local association

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Magnetite The mineral Magnetite information and pictures

Magnetite is an important ore of iron. Well formed crystals are popular among mineral collectors, and the magnetic Lodestone variety is frequently sold in hobby shops to amateur collectors. Magnetite is also of significant interest to the science community due to its strong magnetic properties.

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The Andes, copper mines and volcanoes of Chile

Apr 19, 2015 · Examples of some of the giant porphyry copper deposits that are Chuquicamata and Rio Blanco-Los Bronces. I got to visit some of these copper deposits, which are now active mines and the sizes of these operations are absolutely incredible! We also went to a massive magnetite (i.e. iron) mine called Los Colorados.

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Mining in Chile Cochilco

In Chile, mining is a crucial component of the overall economy and an age-old endeavor with a culture of its own. Although operations exist throughout the length of the country, mining reigns supreme in

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Rock-magnetism and ore microscopy of the magnetite

Rock-magnetism and ore microscopy of the magnetite-apatite ore deposit from Cerro de Mercado, Mexico L. M. Alva-Valdivia1, A. Goguitchaichvili1, J. Urrutia-Fucugauchi1, C. Caballero-Miranda1, and W. Vivallo2 1Instituto de Geof´ısica, Universidad Nacional Aut

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Revision 1 Magnetite spherules in pyroclastic iron ore

19 The El Laco iron deposits in northern Chile consist of magnetite (or martite) and minor 20 hematite, pyroxene and apatite. The orebodies are situated on a volcanic complex and resemble 21 lavas and pyroclastic deposits, but a magmatic origin is rejected by some geologists who regard

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Oxygen isotope composition of magnetite Taylor & Francis

Abstract Magnetite-apatite iron ores of the Kiruna type, unaffected by deformation, have structures and textures similar to those of igneous rocks. The best examples are the El Laco deposits in northern Chile which resemble lava flows, pyroclastic deposits and dikes. El Laco magnetites have δ18O values between 2.3 and 4.2‰ (V-SMOW).

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Apatite Mineral Chemistry From IOA Deposits in Northern Chile

The Carmen, Fresia and Mariela iron-oxide apatite (IOA) deposits of Cretaceous age, located in the Coastal Cordillera of northern Chile, comprise massive bodies of magnetite with minor apatite and actinolite crystals spatially related to diorite intrusions. In order to provide new insights on the origin of Andean IOA deposits, we provide geochemical data of apatite grains collected from these

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Iron ore,minerals, hematite, magnetite, magnet, mineral iron,

Jan 27, 2018 · Magmatic magnetite ore deposits. Occasionally granite and ultrapotassic igneous rocks segregate magnetite crystals and form masses of magnetite suitable for economic concentration. A few iron ore deposits, notably in Chile, are formed from volcanic flows containing significant accumulations of magnetite phenocrysts.

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Magnetite-Cu-Au Deposits in Deeply Eroded Magmatic Arcs

Magnetite deposits with distinctive ± actinolite ± apatitebearing gangue and spatially-extensive sodic-calcic wall rock alteration occur in both Proterozoic metamorphic terrains and Mesozoic-Tertiary magmatic arcs. Examples from both settings constitute significant sources of iron ore (e.g. Kiruna, Sweden; El Romeral, Chile) and some host major Cu-Au deposits that have a local association

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Petrochemistry of I-type magnetite-series granitoids of

Fig. 1 Distribution of metallic igneous deposits in the northern Chile-Peru (simplifi ed from Sillitoe, 1992) and locations of the studied areas. Petrochemistry of I-type magnetite-series granitoids (Ishihara and Chappell) ― 385 ―

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Chapter 6 Kiruna-Type Iron Oxide-Apatite (IOA) and Iron

tions in magnetite and pyrite, Fe and O stable isotope abundances of magnetite and hematite, H isotopes of magnetite and actinolite, and Re-Os systematics of magnetite from the Los Colorados Kiruna-type IOA deposit in the Chilean iron belt to develop a new genetic model that explains IOCG and IOA deposits as a continuum

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Prospecting For Magnetite Ore Deposits With A Innovative

Has developed and patented by JSC"MMK"fundamentally novel magnetometers and methods of quantitative geochemical forecasting of magnetite ore deposits which allow to cut the costs (by as much as 50%) of locating iron ores at all stages of prospecting The "Magnitometer-locators" were worked out for the first time in history,They have 3 licences.

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Magnetite The mineral Magnetite information and pictures

Magnetite is an important ore of iron. Well formed crystals are popular among mineral collectors, and the magnetic Lodestone variety is frequently sold in hobby shops to amateur collectors. Magnetite is also of significant interest to the science community due to its strong magnetic properties.

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