Titanium magnetite and magnetite of iron ore deposits of different ...

Titanium magnetite and magnetite of iron ore deposits of different genesis. L.F. Borisenko, S.I. Lebedeva and L.I. Serdobova. Titanium magnetite and magnetite were cho- sen from magmatic (segregational and hystero- magmatic), hydrothermal and contact-rnetasoma - tic deposits of the Urals and the Caucasus. The.

Magmatic Ore Deposits - Springer Link

A magmatic ore deposit is an accumulation of magmatic minerals. Some of these minerals are extremely rare and almost never encountered in common rocks, an example being alloys of the platinum metals; other minerals, such as magnetite, are common and can be seen in many thin sections. They form an ore deposit...

Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ores - Nature

Apr 10, 2013 ... Figure 4: Magnetite δ18O values from GMD compared to other volcanically-hosted iron ore deposits. Figure 4. For reference, magnetites in equilibrium with MORB [red box], the range for typical 'ortho-magmatic' magnetites after Taylor [pale pink box] and magnetite in equilibrium with an evolved rhyolite...

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

Jul 1, 1994 ... Columnar magnetite, a conspicuous form of magnetite at El Laco with occasional dendritic branching, has been found in two other apatite iron provinces: the Cretaceous iron belt in Chile, a 600-km-long zone along the Pacific with about 40 deposits, and the Early Proterozoic Kiruna ore field in Sweden.

Ore deposits produced by magmatic segregation, with special ...

is not unusual. In deposits showing such relations, circulating waters and pneumatolitic action have undoubtedly been instrumental in the for mation of the ore bodies, although a primary concentration may have tak en place by a direct segregation from a molten magma. In some regions both types of magnetite deposits are...

Magnetite solubility and iron transport in magmatic-hydrothermal ...

Magnetite solubility and iron transport in magmatic-hydrothermal environments. ADAM C. SIMON,1,*† THOMAS PETTKE,2 PHILIP A. CANDELA,1 PHILIP M. PICCOLI,1 and CHRISTOPH A. HEINRICH. 2. 1Laboratory for Mineral Deposits Research, Department of Geology, University of Maryland, College Park, MD 20742,...

Magmatic Features of Iron Ores of the Kiruna Type in ... - CiteSeerX

Chile, a 600-km-long zone along the Pacific with about 40 deposits, and the Early Protero- zoic Kiruna ore field in Sweden. 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...

(IOA) Deposit Formation by Efficient Flotation of Magmatic Magnetite ...

Massive Iron Oxide-Apatite (IOA) Deposit Formation by ... hydrothermal-magmatic features at Los Colorados and allows a genetic connection between Kiruna-type IOA and. IOCG deposits. 2 Samples. Samples from two drill cores were collected from the Los ... of the LC magnetite ore resulted from a sequence of events.

Magmatic iron ores - Naturhistoriska riksmuseet

May 12, 2017 ... ... ores in Sweden and the magmatically formed El Laco iron deposit in Chile sheds new light on the controversial issue about the formation of the Kiruna deposits (magmatic vs. hydrothermal). The discovery of large iron oxide breccias with Cu-Au-REE has renewed the interest in magnetite-apatite iron ores...

Giant Kiruna-type deposits form by efficient flotation of magmatic ...

May 19, 2015 ... tant source of Fe ore, and two radically different processes are being actively investigated for their origin. ... formed magmatic magnetite-bubble pairs, which become a rising magnetite suspension that ... The ori- gin of Kiruna-type IOA deposits remains controversial, and fundamen- tally different formation...

Economic geology - Magmatic ore deposits_1 - SlideShare

Jan 10, 2017 ... Skarn- and contact-metasomatic ore deposits 8. Porphyry copper (Mo-Au-Sn-W) deposits 9. Hydrothermal-metasomatic ore deposits 10.Hydrothermal vein deposits 11.Volcanogenic ore deposits Magmatic Ore Formation Systems; 32. 1. Orthomagmatic ore formation Oxide (magnetite, ilmenite, chromite),...

The use of trace elements in Fe-oxides as provenance and ... - UQAC

In order to use trace element composition of magnetite as an indication of its origin it is necessary to understand the processes that control the trace element concentrations in magnetite. We have characterised trace element distribution in magnetite, using laser ablation. ICP-MS, from magmatic ore deposits (Fe-Ti-V-P and...

Magmatic iron ores and associated mineralisation: Examples from ...

Abstract - The El Laco magnetite-apatite ore deposits in the Andean Cordillera of northern Chile occur as massive, tabular bodies, as stratified, pyroclastic ores, and as crosscutting dykes and vein complexes. The ore deposits and surrounding volcanic rocks, mainly andesites, are Plio-Pleistocene in age and preserve many...

Untitled - USGS Publications Warehouse

Dec 31, 1970 ... Titaniferous magnetite deposits are magmatic accumulations of magnetite and ... Vanadium can be recovered from titaniferous magnetite ore by either of ... Magnetite (Fe30 4. ) and ilmenite (FeTi03) are the principal ore minerals, but hematite (Fe20a) is pres- ent in some deposits as is some rutile (Ti02) and.

Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ores in ...

Apr 10, 2013 ... We show that magnetites from the largest central Swedish 'Kiruna-type' deposit at Grängesberg have d18O values between 20.4 and 13.7%, while the 1.9021.88 Ga meta-volcanic host rocks have d18O values between14.9 and19%. Over 90% of the magnetite data are consistent with direct precipitation...

Magnetite-Apatite and IOCG deposits formed by magmatic ... - SGA

AUTHORS: Fernando Tornos. ABSTRACT: The geology and geochemistry of the coeval magnetite-apatite and IOCG deposits of the Central Andes are consistent with the ores being produced by evolving magmatic-hydrothermal systems associated with arc-related calc-alkaline magmatism. The magnetiteapatite deposits...

Iron ore deposits in the Eastern Tianshan orogenic belt (China) : the ...

Iron ore deposits in the Eastern Tianshan orogenic belt (China) : the magnetite- skarn-magmatism association. Earth Sciences. Université d'Orléans, 2012. English. . HAL Id: tel-00762741 https://tel.archives-ouvertes.fr/tel-00762741. Submitted on 7 Dec 2012. HAL is a multi-disciplinary open access archive for the deposit...

The oxygen isotope signature of the apatite-iron oxide ore at ...

formed directly from a magma as suggested for the iron ore deposits of El Laco in Chile or the deposits in Kiruna, although also these two are still subjected to controversies. In 2009 sampling was done on drillcores through the Grängesberg ore. On these samples an oxygen isotope study on magnetite, quartz and whole...

Iron Ores | ispatguru.com

Mar 31, 2013 ... The three primary sources of iron ore are banded iron formations, magmatic magnetite ore deposits, and hematite ore. Banded iron formations (BIF) – These are fine grained metamorphosed sedimentary rocks composed predominantly of magnetite and silica (as quartz). Most of the iron ore is extracted from...

Kiruna-type apatite-iron ore in Svalbard: the evidence from main and ...

Apatite‐iron oxide deposits (so called „Kiruna‐type” iron ores) are phosphate‐rich magnetite‐hematite ores associated with magmatic or volcanic rocks. They are originally known from Paleoproterozoic rocks of the Baltic Shield in Sweden, and subsequently recognized in formations of various age in many other places...

The Shaytor Apatite-Magnetite Deposit in the Kashmar-Kerman ...

Aug 22, 2016 ... The similar REE patterns for the magnetite and volcanic basaltic host rocks suggest their close genetic linkage and support a magmatic origin for the deposit. The Shaytor deposit shows the typical characteristics of Kiruna-type deposits with regard to the mineral assemblages, ore tex- ture and structure, and...

Flotation of magmatic minerals S - ESC Publications - University of ...

Jan 6, 2016 ... metal-rich deposits such as Ni–Cu–PGE (platinum group element) ore bodies may be generated in the upper crust (Naldrett, 1999), in which sul- fides and magnetite phases are arranged in concentrated layers by crystal settling, or disseminated through in-situ crystallization. Magnetite and sulfide liquids,...

SorkheDizaj Iron OxideApatite Ore Deposit in the Cenozoic ...

The Sorkhe-Dizaj iron oxide–apatite deposit in the Cenozoic Alborz-Azarbaijan magmatic belt, NW. Iran, is hosted mainly ... Ore minerals dominantly comprise magnetite, apatite, and mona- zite, as well as minor ... Keywords: Alborz-Azarbaijan magmatic belt, Iran, iron oxide–apatite, Kiruna-type, Sorkhe-Dizaj. 1. Introduction.

From Magmas to Ore Deposits - Mineralogical Society of America

Hélène Legros, Christian Marignac, Thomas Tabary, Julien Mercadier, Antonin Richard, Michel Cuney, Ru-Cheng Wang, Nicolas Charles, and Marc-Yves Lespinasse. Abstract Members Full Text Download Deposit Item. 26. Magnetite-apatite deposit from Sri Lanka: Implications on Kiruna-type mineralization associated with...

Geochemistry, Paragenesis, and Wall-Rock Alteration of the ...

Aug 27, 2014 ... In spite of the existence of the important iron ore deposits in the Qatruyeh area, there are a few reports on the ores with no exploitation activities. ..... The similarity of REE patterns in the layered magnetite ores and magmatic rocks is consistent with this conclusion that the layered magnetite was formed from...

Iron Ore Deposits - Delaware & Lehigh - National Heritage Corridor

Iron ore is usually rich in iron oxides such as magnetite, limonite, or hematite. Limonite: A brown-colored iron oxide ore formed by the weathering of iron-bearing minerals and mined for the production of iron. Magma: The molten, flowing rock material generated beneath the earth's crust. Magma rises toward the Earth's...

Iron Ore - Mine Pars - Gilsonite Powder

These deposits are commonly referred to as “direct shipping ores” or “natural ores”. Increasing iron ore demand, coupled with the depletion of high-grade hematite ores in the United States, after World War II led to development of lower-grade iron ore sources, principally the utilization of magnetite and taconite. (Taconite is a...

Minerals - AZERBAIJAN.az

Metalliferous ores (magnetite, hematite) in Azerbaijan fall into four generic classes: magmatic segregation, skarn-magnetite (contact-metasomatic), hydro-termal- metasomatic and sedimentary ones. Among them only skarn-magnetite type Dashcasan ore-bearing region contains commercial ore-deposits: Dashcasan, South...

What is a Mineral Deposit by Definition - 911 Metallurgist

Aug 27, 2017 ... An ore is defined as a mineral or rock from which some valuable constituent, usually a metal, can be profitably extracted. Thus hematite and magnetite are ores of iron; galena is an ore of lead; zinc blende is an ore of zinc. With the ore-mineral is more or less material of no value, called gangue; and whether...

IRON ORE

Chilean magnetite iron ore deposits within the Atacama Desert have also formed alluvial accumulations of magnetite in streams leading from these volcanic ... Another, minor, source of iron ores are magmatic accumulations in layered intrusions which contain a typically titanium-bearing magnetite often with vanadium.

IRON-OXIDE MAGMAS tN THE SVSTEM Fe-CO - RRuff

lies in the three-phase triangle magnetite-wiisfite- graphite and contains less than three mole Vo CO2. The calculated l(Or) is l0-1e.2 atmospheres. These conditions are reasonable for some titaniferous iron- ore deposits associated with mafic rocks. Keywords: iron-ore magma, iron-oxide liquids, sys- tem Fe--C-O, phase...

Magnetite: The Story of the Mineral's Formation and Stability pp. 1-100

of formation and stability of the main iron-rich minerals of iron ore deposits and stability of some other iron-rich minerals that can decompose to form magnetite. Conditions of the formation of magnetite-rich iron ore deposits, such as banded iron formations (BIFs), magnetite-skarns, magmatic magnetite and titanomagnetite...

People | Adam Simon

Brian experimentally recreates magmatic conditions in the laboratory to quantify the partitioning of sulfur between silicate melts and the mineral apatite. ... Her work on IOA deposits is focused on fully characterizing the chemistry of the mineral magnetite, the which modally dominates this deposit type, in order to shed light on...

Titaniferous Magnetite Deposits Associated with Archean ...

The formation of the massive ore bodies is referred to late magmatic crystallization from tholeiitic magma followed by Fe-Ti enriched residual liquid injection within the host rocks. Syn to late formation of the magnetite ores along with gabbro-anorthositic intrusive with respect to the Archean Greenstone Belt of East Indian...

Sweden - Porter GeoConsultancy - Ore Deposit Description

(2010), conclude that most features of the Kiirunavaara ores are compatible with both a magmatic magnetite intrusive origin, and over-printing by hydrothermal processes. In the deposit area, there is evidence of pre-ore metasomatic magnetite-albite-actinolite-chlorite alteration and mineralisation, followed by massive,...

Mineral Resources - Tulane University

Mar 20, 2012 ... It is least costly to extract the iron from oxide minerals like hematite (Fe2O3), magnetite (Fe3O4), or limonite [Fe(OH)]. Although iron also ... Magmatic Ore Deposits - substances are concentrated within a body of igneous rock by magmatic processes like crystal fractionation and crystal settling. Magmatic...

The Iron Ore Resources of Karnataka | Geo Karnataka

Apr 18, 2007 ... Karnataka is endowed with rich deposits of iron ores; with approximately 9.03 billion tonnes or about 41% of India 's estimated total haematitic and magnetitic iron ore resources (Table ... Magmatic Ores: Titaniferous Magnetite bands associated with ultramafic intrusives are formed by magmatic processes.

Fernando Henriquez - Google Scholar Citations

Magmatic iron ores and associated miner alisation: examples from the Chilean High Andes and Coastal Cordillera. HR Naslund. Hydrothermal iron oxide copper-gold and related deposits: A global …, 2002. 105, 2002. Crystal-growth textures in magnetite flows and feeder dykes, El Laco, Chile. F Henriquez, RF Martin.

Ortho Magmatic Ore Deposits - Geological Society of India

Mineralogy and Ore Petrography of Vanadiferous Titaniferous Magnetite Ores of Mayurbhanj Basic Igneous Complex, Odisha, Restricted Access. S. K. Das, 127-137...

Iron Oxide Breccias & Veins - Mineral Deposit Profiles, B.C. ...

SYNONYMS: Olympic Dam type, Kiruna type, apatite iron ore, porphyrite iron (Yangtze Valley), iron oxide rich deposits, Proterozoic iron oxide (Cu-U-Au-REE), volcanic-hosted magnetite. COMMODITIES (BYPRODUCTS): Fe, P, Cu, Au, Ag, U (potential for REE, Ba, F). EXAMPLES (British Columbia - Canada/International):...

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