stratiform chromite deposit model usgs

Stratiform Chromite Deposit Model - USGS Publications Warehouse

deposit models for resource assessment: U.S. Geological Survey Scientific ... geophysical characteristics of stratiform chromite deposits provided by Carol Finn...

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Stratiform Chromite Deposit Model - USGS Publications Warehouse

Stratiform Chromite Deposit Model. By Ruth F. Schulte, Ryan D. Taylor, Nadine M. Piatak, and Robert R. Seal II. Open-File Report 2010–1232. U.S. Department...

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Stratiform Chromite Deposit Model - USGS Publications Warehouse

Nov 2, 2012 ... Abstract. A new descriptive stratiform chromite deposit model was prepared which will provide a framework for understanding the...

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Podiform chromite deposits--database and grade and tonnage models

and tonnage models: U.S. Geological Survey Scientific Investigations Report 2012-5157, 45 p. ..... Unlike stratiform chromite deposits, podiform chromite depos-.

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Mineral Deposit Models | Products | USGS Mineral Resources ...

Links to mineral deposit model reports published by the U.S. Geological Survey's Mineral Resources Program.

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Mineral Deposit Models - USGS Publications Warehouse

Cartoon cross-section of pediform chromite deposits 40. 21. Tonnages of pediform chromite deposi a typical mafic-ultramafic stratiform complex 41. 22. Chromite...

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Update Ore Deposit Models

Mar 4, 2013 ... Mineral-deposit models based on specific deposit types are a ... Seal, R.R., II, 2010, Stratiform chromite deposit model: U.S. Geological Survey...

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Magmatic Ore Deposits in Layered Intrusions - USGS Publications ...

Model for Reef-Type PGE and Contact-Type Cu-Ni-PGE. Deposits. Open-File ...... Associated deposit types include stratiform chromitite (Schulte and others, 2010), stratiform .... For example, cumulus olivine and chromite crystallize early in the...

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Geological and Geophysical Studies of Chromite Deposits - USGS ...

(D) Geophysical studies of chromite deposits in the Josephine Peridotite of northwestern ... Complex, a stratiform complex in Montana, contains substan- tial tonnages of ...... the overlying ophiolite (See model of Greenbaum, 1972a, p. 125-.

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Quantitative assessment of undiscovered resources in stratiform and ...

discovered resources in stratiform and podiform chromite deposits in. Finland. ... structing separate volume models for undiscovered reef-type chromite deposits for each .... 1.1 Assessment project of the Geological Survey of Finland .

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ultramafic associated chromite and nickel occurrences in british ...

Ministry of Energy Mines and Penohm Resources. Open File ..... Mg for chromite from podiform and stratiform bodies .... Canada and the British Columbia Geological Survey. Branch. ..... proposed a dynamic model for chromite pod genesis. It.

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References - Wiley Online Library

modeling of water-rock interactions in mining envir- onments. ... US Geological Survey. Open-File Report 90-688, 176 .... Ballhaus, C. (1998) Origin of podiform chromite deposits by magma ..... hosted stratiform copper deposit model. Economic.

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Mineral Deposit Models

The 85 descriptive deposit models and 60 grade-tonnage models presented ... 1983 as part of the USGS-INGEOMINAS Cooperative ..... Tonnages of podiform chromite deposits of a typical mafic-ultramafic stratiform complex 41. Chromite...

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PGE-copper-nickel potential of mafic-ultramafic intrusions in the Bird ...

been intermittently explored for stratiform chromite deposits and Cu-Ni. (± PGE) sulphide ... PGE occurrences, the sulphide mineralization at the Chrome property displays moderate ..... critical observations needed to develop such a model. MAYVILLE .... southeast Manitoba; Geological Survey of Canada, Open. File 2067.

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Mechanisms for formation of the Archean sill-hosted Black Thor ...

Michel G. Houlé, Geological Survey of Canada, Michel. ... Cr2O3. “Archean sill-hosted” or “conduit-hosted” chromite deposits of this type occur in many ... deposits, which are different from traditional stratiform and all podiform type deposits. ... Such a model could explain in systems of this type and possibly in other systems.

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Sedimentary exhalative deposits - Wikipedia

Sedimentary exhalative deposits (SedEx deposits) are ore deposits which are interpreted to have been formed by release of ore-bearing hydrothermal fluids into a water reservoir (usually the ocean), resulting in the precipitation of stratiform ore. .... Most deposits fit the model of having been formed late in the basin history and...

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Part I Aynak Information Pakage - British Geological Survey

Compiled by the Afghanistan Geological Survey and the British Geological Survey. © Afghanistan .... 3 Metallogenic Model for the Aynak Copper Deposit . ..... particularly prospective for stratiform copper deposits hosted in Vendian – Cambrian metasedimentary rocks, and for chromite in the ophiolitic sequences. The final...

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Chromite pods envelops by - Yumpu

The Mineralogy and Chemistry of the Chromite Deposits - Nicholas . ... pubs.usgs.gov ... Models and Exploration Methods for Major Gold Deposit Types.

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Minerals | Chromite

Economic deposits form by crystallisation of chromite from a cooling magma, resulting in large stratiform deposits or smaller pod-like deposits. The most...

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Ni-Cu-PGE - Caribbean Journal of Earth Science

Nov 5, 2013 ... of suitable descriptive deposit models for magmatic Ni-Cu-PGE deposits, (ii) identification .... model derived mostly from the USGS Descriptive.

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Annex 1: Greenland mineral deposit descriptions - European ...

Jul 31, 2015 ... Fiskenæsset stratiform anorthosite complex occurs, with a combined strike ... chromite deposits at Fiskenaesset, West-Greenland. ... copper resource estimates are derived from a statistical simulation which used globally tonnage/grade models ... http://minerals.usgs.gov/minerals/pubs/commodity//copper/...

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Geochemistry of Chromitites in Eastern Part of Neyriz Ophiolite ...

The results of chemical analysis of chromite ore Dowlat Abad-Tang e Hana area. ..... R.D., Piatak, N.M. and Seal, R.R. (2010) Stratiform Chromite Deposit Model. ... [42], Nabavi, M.H. (1976) History of Iran Geology, Geological Survey and...

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geological exploration as per unfc stages and field guidelines - unece

U.S.G.S. U.S.S.R CLASSIFICATION. NATIONAL CLASSIFICATION. Categor y. Purpose ..... Stratiform, Stratabound and Tabular deposits of regular habit. • Stratiform ... thick bauxite capping, regional chromite lodes in large ultramafics; limestone .... drilling, ore body modelling, bulk sampling for beneficiation, geotechnical.

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Petrogenesis of Archaean Chromite Deposits of the ... - Academia.edu

Petrogenesis of Archaean Chromite Deposits of the Roro-Jojohatu Areas in the ... ER, Geological Survey of India, Kolkata 3 Monitoring Division, CHQ, Geological Survey of .... Occasionally the fine euhedral chromite grains stratiform chromite bearing ..... In case of magma mixing model, a CONCLUSIONS primitive magma is...

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металлогения - geohit.ru - сайт для геологов

Stratiform Chromite Deposit Model \\ USGS ... Mineral Deposit Profiles - British Columbia, Canada ... Society for Geology Applied to Mineral Deposits \\ SGA...

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References - Geoscience Australia

Western Australia Geological Survey, Memoir, 3, 119-126. ... Preliminary model of porphyry copper deposits. .... Chromite. http://www.consminerals.com.au/b/au_chromite.php (accessed 26 ... The importance of oxidized brines for the formation of Australian Proterozoic stratiform sediment-hosted Pb-Zn (SEDEX) deposits.

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Ophiolite paper 6e - Copy for pdf - ORCA

continental stratiform chromitite, ophiolitic chromitite pods are discontinuous, unpredictable in ... major podiform chromite deposits and of IPGE and PPGE concentrations in podiform chromitites ... 2007; USGS 2009; Varne et al. ..... Model showing the removal of PGE from the mantle (dashed line) and the resulting spike of...

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Chromite deposits of the Sagua-Baracoa range, Eastern Cuba

Geological survey, ... The Sagua-Baracoa range inc1udes one of the most significant chromite-producing areas of. Cuba. Chromite deposits are associated with ophiolitic assemblages and show typicai features of ..... This model may be applied to the studied area ... Fields of stratiform and podiform ores after lrvine (1967).

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2015 Mining and Mineral Symposium - Montana Bureau of Mines ...

May 9, 2015 ... Revised Model for Carbonate-Hosted Proterozoic Hydrothermal Talc ... Boron minerals of western Montana—Occurrences and ore deposit models, Bruce Cox, .... Geological Survey Open-File-Report 74-354, scale 1:48,000. ..... platinum group minerals and chromite in the Stillwater Complex, petrified wood...

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Igneous ~ Mining Geology

May 5, 2015 ... ... massive ore. Stratiform chromite seams are found by geological and petrological investigations. .... Commercial olivine and dunite deposits are common in alpine-type ultrabasic terrains. A limited market ... World map of Lithium Distribution Source"USGS" ..... Digital Elevation Models (DEM) · ← Newer...

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U–Pb geochronology documents out-of-sequence emplacement of ...

Nov 14, 2016 ... Our U–Pb ages and modelling necessitate reassessment of the genesis of ... a major stratiform pyroxenite-hosted deposit of PGE-rich magmatic sulfide ... instead of the lower chromite-bearing anorthosite, a mafic pegmatite is observed. ..... multiple USGS and CANMET certified reference materials (WMG-1,...

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Reasons to Invest In Afghanistan's Mining Sector - Ministry of Mines ...

Jan 16, 2014 ... Geological Survey (USGS), the British Geological Survey. (BGS) and ... chromite deposits associated with multiple igneous ... stratiform copper deposits sedimentary and ... been tested in light of modern models linking Cu-Au.

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Undiscovered porphyry copper resources in the Urals—A ...

Sep 6, 2016 ... a U.S. Geological Survey, 954 National Center, Reston, VA 20192, USA .... The global grade and tonnage models for porphyry copper deposits from Singer et al. .... and fragments of volcanic arc rocks that host chromite and VMS deposits ..... The primary ore occurs as stratiform massive and disseminated...

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The Stillwater Complex chromitites: The response of chromite crystal ...

and sub-continental settings, stratiform chromitites in cratonic layered ... model of the Bushveld magma (Cawthorn and Walraven,. 1998). Moreover .... Benbow mine (layers E, J and K). Samples ..... USGS Bulletin 1674-E, 1-28. Marsh, B.D....

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MICON - NI 43-101 Technical Resource Report - SlideShare

Jun 16, 2010 ... ... on the Mineral Resource Estimate for the Big Daddy Chromite Deposit. ... reports and maps produced by the Ontario Geological Survey (OGS...

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9th INternational Platinum Symposium

2Ontario Geological Survey, MNDM, Willet Green Miller Centre, ... The Mineralogy and Chemistry of The Chromite Deposits of Southern .... The Model PGE Location in the Ultramafic Rocks of Kingash Deposit ..... Stratiform PGE Mineralization in Tholeiitic Layered Intrusions of the Midcontinental rift, Northeastern Minnesota:...

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World Bank Document

Oct 1, 2012 ... Potentials and major types of identified deposits . ...... metallogenic model through a correlation with regional structures .... Makola, Holle and Kouilou are examples of these stratiform deposits ..... The current artisanal production of Congo, evaluated by the USGS at 100 kg of ... Colombo-tantalite Chrome.

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Mineral profile - NERC Open Research Archive

Table 2 Common cobalt-bearing minerals found in economic deposits. Name. Group ... understood but the most widely accepted model of ore genesis is that...

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Unique challenges of clay binders in a pelletised chromite pre ...

General process flow sheet for chromite ore beneficiation. (Murthy et al., 2011) ...... The United States Geological Survey (USGS) define shipping-grade chromite ore ... stratiform-type chromite deposits occur as parallel seams in large, layered.

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Earth Processes and Resources - NSDL

chromite ore in gabbros, peridotites, dunites and anorthositic plutonic rocks. The chromite deposits display two distinct modes of occurrences: as stratiform, layered deposits in large ... metric tons (USGS Mineral commodities summary, 2004). ... ore genesis in the Singhbhum Copper Belt, considering all aspects a model.

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