Platinum And Chromite Deposits In Nigeria

African continent: Rich land of minerals and energy sources

Table 1 indicates that this country possesses ample reserves of platinum, diamond, chromite, cobalt, phosphate, manganese, gold, uranium, and bauxite. Africa is home to nearly …

List of Some Nigerian Iron Deposits and Locations

There are several deposits of low-grade iron ores in Nigeria. They are of three geological types; ferruginous quartzites (metamorphosed), ferruginous schists (metamorphic) and oolitic...

The Chrome & Platinum Connection | Oreways Mining South Africa

The Bushveld Complex in South Africa is home to a unique mining operation that excels in platinum production while also serving as a substantial source of chromite. This operation, a partnership between two industry leaders, showcases advanced technology and operational efficiency in extracting valuable resources from the Merensky Reef.

(PDF) Exploring Africa's Rich Mineral Resources

It is well endowed with reserves of platinum, diamond, chromite, cobalt, phosphate, manganese, gold and bauxite. ... Nigeria is Africa's most populous nation and the largest economy, rich in petroleum resources but with no world-class metallic mineral resources. ... Chromite deposits form as a direct result of igneous differentiation. During ...

Platinum-Group Minerals and Other Accessory Phases in …

3. Previous Work and Descripti on of the Chromite Deposits From the end of the 19th century until 1929 about 80 small Al-rich chromite deposits were discovered and mined in the Alapaevsk massif. This activity yielded more than 70 thousand tons of ore. In the second half of the 20th century several new chromite deposits, comprising Cr-rich ore,

Platinum-Group Minerals and Other Accessory Phases in Chromite Deposits

An electron microprobe study has been carried out on platinum-group minerals, accessory phases, and chromite in several chromite deposits of the Alapaevsk ophiolite (Central Urals, Russia) namely ...

African continent: Rich land of minerals and energy sources

Table 1 indicates that this country possesses ample reserves of platinum, diamond, chromite, cobalt, phosphate, manganese, gold, uranium, and bauxite. Africa is home to nearly 30 % of the world's mineral resources, despite the fact that there are little mineral exploration efforts there. ... In order for a copper deposit to be economically ...

Composition and textures of chromite and platinum-group …

Semantic Scholar extracted view of "Composition and textures of chromite and platinum-group minerals in chromitites of the western ophiolitic belt from Pampean Ranges of Córdoba, Argentina" by J. Proenza et al. ... chlorite in metamorphosed ultramafic rocks (serpentinite and talc schist) of the Egbe-Isanlu schist belt, southwest Nigeria ...

The giant chromite deposits at Kempirsai, Urals: constraints from …

The investigation of stable and radiogenic isotopes and of platinum-group (PGE) and rare earth elements (REE) in chromitites and associated ultramafic rocks of the Kempirsai Massif, southern Urals, gives strong evidence for a multistage formation of giant ophiolitic-podiform chromite deposits present in the southeastern part of the massif. The Kempirsai ophiolite massif is …

Stratiform Chromite Deposit Model

Stratiform chromite deposits are found throughout the world, but the chromitite seams of the Bushveld Complex, South Africa, are the largest and most intensely researched. ... (orthopyroxene and clinopyroxene), plagioclase, sulfides …

Platinum-group element (PGE) deposits and occurrences: …

Empirical evidence supports theoretical considerations that chromite and magnetite precipitation may be particularly conducive to trigger sulfide melt saturation, due to a pronounced decrease in FeO content of the magma. ... Deposits containing Ni, Cu and platinum-group elements (PGE) are usually associated with mafic and ultramafic rocks. The ...

A Review of Nigerian Metallic Minerals for Technological …

Some known deposits were confirmed while new ones were identified and documented. The metallic minerals found in Nigeria include iron ore (with over 3 billion metric tonnes), ferro-alloy …

Geological and Geophysical Studies of Chromite Deposits in …

Types of chromite deposits _____ 26 Structure of chromite deposits _____ 28 References cited _____ 34 ILLUSTRATIONS Page FIGURE 2. Photograph showing cumulate textures in chromitiferous dunite._ 11 3. Rose diagram of steep faults cutting the ophiolitic rocks and surrounding rocks _____ 14 ...

CHROMITE GEOLOGY OF ZIMBABWE AND RELATED …

underground mining is cost effective and practiced. •Dips have got an effect on the unit mining cost, mining method, UPD achieved, Mining depth and productivity. SEAM DIP •Seams 1-4 in different areas suffer from seam continuity as a result of seam blanking, faulting and replacement. •The seam mostly affected by seam low continuity is seam 1.

Platinum-Group Element and Trace Element Contents of Chromite …

The compositions of chromites from volcanic rocks is of interest for two reasons. First, most chromite-rich rocks from intrusions and the mantle are enriched in Os, Ir, Ru (Ir-platinum-group elements, IPGE), and Rh relative to volcanic rocks and in some cases are also enriched in Pd and Pt.

Platinum-group element abundance and distribution in chromite deposits

The high-A1 chromite deposits of the Zambales ophiolite crystallized from less de- pleted mantle-derived melts (Bacuta, 1989) and, relative to Acoje's sulfur- deficient high-Cr chromite deposits, are poor in the PGEs, particularly Ir. Ba- cuta (1989) argued that the low PGE abundance in high-A1 chromite deposits is produced by a combined ...

Nigeria's Deposits Worth $700 Billion, Can Meet

Platinum group minerals can be found in the middle belt region, including Benue and nickel deposits are present in Kaduna and other locations. Zinc, vital for both offshore and …

Podiform chromite deposits--database and grade and tonnage …

Podiform Chromite Deposits—Database and Grade and Tonnage Models Scientific Investigations Report 2012–5157 U.S. Department of the Interior U.S. Geological Survey COVER View of the abandoned Chrome Concentrating Company mill, opened in 1917, near the No. 5 chromite mine in Del Puerto Canyon, Stanislaus County, California (USGS photograph by Dan Mosier, 1972).

Map showing mineral occurrences in Nigeria

Africa hosts about 30% of the Earth's mineral resources and ranks first or second in the quantity of world reserves of platinum, chromite, diamond, bauxite, cobalt, manganese, zirconium and...

Platinum Group Element, Chromium, and Vanadium Deposits in …

Most deposits of platinum group elements (PGE), chromite, and vanadiferous magnetite occur in mafic intrusions. Several represent some of the most laterally continuous and uniform, in terms of grade and thickness, of all orebodies.

Human exposure to chromite mining pollution, the toxicity …

Chromite ore mining is a typical mining industry with substantial environmental hazards. Chromium metal derived from industrial chromite mining is used in the production of stainless steel, leather industry, paint industry, and other important industrial usages [11].Nevertheless, the presence of chromium ions, particularly hexavalent chromium (Cr(VI)) in …

Stratiform chromite deposit model | U.S. Geological Survey

A new descriptive stratiform chromite deposit model was prepared which will provide a framework for understanding the characteristics of stratiform chromite deposits worldwide. Previous stratiform chromite deposit models developed by the U.S. Geological Survey (USGS) have been referred to as Bushveld chromium, because the Bushveld Complex in …

Overview of Nigeria's Mineral Resources in the Context of …

gold, platinum, chromite, uranium, manganese, vanadium, tantalum and cobalt and industrial minerals phosphate, zirconium, vermiculite and gemstones. it is estimated that Africa is the repository ...

Platinum-Nickel-Chromium Deposits | ScienceDirect

The deposits are characteristically dominated by the platinum group of elements (PGEs), nickel, or chromite, and/or in ratio of main/byproducts. The world reserve base of PGE metals is estimated at 66,110 tonnes (∼72,870 tons), 95% contributed by single source of Bushveld Complex, South Africa, that can supply for the next century.

Integrated geological and geophysical approaches to map …

Different components of a layered ultramafic complex and the associated chromite and platinum group mineral deposit were investigated. The belt comprises several elongated mafic–ultramafic bodies. The most common rocks are deformed highly serpentine chromitiferous ultramafic units at the base overlain by cumulate mafic–ultramafic rocks ...

Podiform Chromite Deposits—Database and Grade and Tonnage …

Of these, 619 deposits have been used to create three new grade and tonnage models for podiform chromite deposits. The major podiform chromite model has a median tonnage of 11,000 metric tons and a mean grade of 45 percent Cr 2 O 3. The minor podiform chromite model has a median tonnage of 100 metric tons and a mean grade of 43 percent Cr 2 O 3.

Platinum-group element abundance and distribution in chromite deposits

A review of previous work relevant to the formation of concentrations of chromite in peridotites from ophiolitic (s.l.) sequences highlights some of the key problems in understanding the complex processes involved.This review forms the basis for chromitite-genesis models that integrate new geochemical data with petrologic, field and microstructural observations, and for …

(PDF) Nigeria's Mineral Resources in Africa's Context

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Overview of Nigeria's Mineral Resources in the …

Most of the metallic deposits are concentrated in Central and Southern Africa, except for bauxite, iron ores, and phosphate in western Africa. Nigeria is Africa's most populous nation and the...

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Chapter 3 (Part II): Mineral Deposit Types 3.7 Nomenclature and …

They contain most of the world's deposits of platinum-group metals and chromium. Classical examples of stratiform magmatic deposits are found as chromite and platinum-rich ores in the Bushveld Igneous Complex (BIC) of South Africa (Fig. 3.15), the Great Dyke of Zimbabwe and the Stillwater complex, Montana, USA.

Platinum-bearing chromite layers are caused by pressure

The origin of platinum-bearing chromitites (up to 90 vol.% chromite), which occur as monomineralic layers up to a few metres thick and hundreds of kilometres in length within mafic-ultramafic ...