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Catherine Rose Roger, Akure (2026)

29/09/2022

Today on SME FUTA online content: Meet A Mining Personnel

First, we would like to congratulate Dr. Nombasa Tsengwa being the first female CEO appointed at Exxaro Resources we wish you a successful tenure.

Dr Nombasa Tsengwa has more than 19 years of executive management and board experience in the public and private sector and is one of the hardest-working leaders in the industry.

Having been appointed as Acting Executive Head of Coal Operations in 2016, and subsequently as Executive Head of Coal Operations in July 2016 - and MD for Minerals in July 2020, Dr Nombasa's accomplishments are evidenced in the performance of the growth engine of Exxaro - which is its coal business, that continues to deliver unrivalled value to all its stakeholders.

Over the last 9 years, Dr Nombasa's, accomplishments have been characterised by innovative ideas, strategic thinking and, most valuable, her tireless efforts to increase the credibility, contributions and prominence of Exxaro in the mining sector.

Under her leadership, Exxaro has expanded its geographical diversity, while nourishing its project, cost, and capital management skills. For example, the company allocated over R17bn to growth capex and generated an average ROCE of 25% since 2017.

In 2017, she won the Standard Bank Business Woman of the year award and in 2018 she won Africa’s Most Influential Woman in Business and Government – Mining Industry Category at the Pan African Awards. An avid long-distance runner, Dr Nombasa has completed 9 comrade’s marathons to date.

As the CEO Designate of Exxaro Resources - one of South Africa's leading mining and renewable energy solutions company, she strives to enable the Executive leadership team to grow in a sustainable way, whilst safeguarding the interests and competing demands of our shareholders, staff, customers, community and broader stakeholder partners.

26/09/2022

MINERAL OF THE WEEK:DIOPSIDE

✍ What is Diopside?

Diopside is a rock-forming pyroxene mineral with a chemical composition of MgCaSi2O6. It occurs in igneous and metamorphic rocks at many locations around the world.

Gem-quality crystals of diopside are faceted into attractive gemstones that are occasionally seen in commercial jewelry. Granular diopside can be easily cut and polished. When it has an attractive color, it is sometimes used as an ornamental stone.

Perhaps the most important use of diopside is its value as an indicator mineral in the search for diamonds. Trail-to-lode prospecting using diopside and other indicator minerals has found diamond deposits in Canada, the United States, Africa, and other locations.
Diopside has potential uses in the glass and ceramics industries, but the mineral usually occurs in accumulations that are too small or impure for effective mining.

✍ Geologic Occurrence of Diopside

The most common occurrence of diopside at Earth's surface is as a primary mineral in olivine-rich basalts and andesites. In these rocks it can be present in quantities of a few weight percent. Diopside also forms during contact metamorphism of limestones and dolomites. Most of the crystalline diopside used to cut faceted gems and the granular diopside used as ornamental stone occurs in these carbonate deposits.

Diopside is much more abundant in Earth's mantle than at the surface. Evidence for this is diopside as a common mineral in ophiolites, and diopside as a common mineral in kimberlites and peridotites that were formed during deep-source volcanic eruptions.

✍ Diopside as a Diamond Indicator Mineral

Most diamonds found at or near Earth's surface were delivered from the mantle during deep-source volcanic eruptions. These diamonds occur in vertical igneous structures known as pipes, which are often composed of kimberlite or peridotite.

Geologists use these green diopside fragments to locate the pipes. They know that the fragments are liberated as the pipe weathers, then scattered by the actions of mass wasting, streams, and glaciers. When diopside fragments are discovered, the geologist knows that they originated up-slope, up-stream, or up-ice from the location in which they were found.

A trail of diopside fragments can lead the geologist to the pipe from which they were weathered. This activity, known as "trail-to-lode" prospecting, finds many diamond pipes and an even larger number of pipes without diamonds.

Read more at :https://lnkd.in/ewQSCZSm

20/09/2022

FIVE PROBLEMS OF MINING IN NIGERIA

✍ High Risk And Health Hazard

Mining naturally is a risky venture but in Nigeria, the risk level is even much higher than in many other countries of the world where technological advancement and better methods have lowered the risk involved.

✍ Activities Of Illegal Miners

In order not to pay government taxes, many small-scale and artisanal miners’ resort to illegal mining operations. A significant percentage of mining operations in Nigeria are carried out illegally.

✍ Lack Of Proper Legislation And Inconsistent Government Policies.

Over the years, lack of proper legislation and constant shifting in position of the government on matters affecting the mining industry has scared away prospective investors.

✍ Non-Availability Of Accurate Geological Data

The information currently available on minerals found in Nigeria as well as localities where they can be found is insufficient. There is still a heavy reliance on data obtained over 50 years ago.

✍ Non-Availability Of Well-Equipped Laboratories

Well-equipped laboratories are necessary for more research to be carried out on these minerals. This is necessary especially in the exploration for new locations that contain minerals as well as the processing and beneficiation of these minerals after extraction to increase their grade.

19/09/2022

MINERAL OF THE WEEK:COQUINA

✍ What Is Coquina?

Coquina is a sedimentary rock composed almost entirely of sand-size fossil debris. The fossils are usually mollusk or gastropod shells and shell fragments. Brachiopod, trilobite, coral, ostracod and other invertebrate shell debris is present in many coquinas. The fossil debris of coquina is composed of calcium carbonate, making coquina a variety of limestone.

✍ Where Does Coquina Form?

Most coquina forms in shallow coastal waters where a steady and abundant supply of sand-size fossil debris is delivered by wave action and currents. The waves and currents must be strong enough to completely remove clay and silt-size particles, but not so strong that the accumulation of sand-size fossil debris is eroded.

Significant deposits of coquina are found along the coasts of Florida and North Carolina. They also occur along the coasts of Australia, Brazil, Mexico and the United Kingdom.

✍ Uses of Coquina

Coquina has several uses. As a subsurface rock unit with a high porosity and permeability, coquina can serve as a groundwater aquifer or as a reservoir rock for oil and natural gas. These are the most significant economic uses of coquina.Crushed stone made from coquina has been used in the construction of unpaved roads. It drains well; however, the weight of traffic gradually crushes the rock, requiring constant replenishment.

Crushed coquina has also been used as a base material in many construction projects where abrasion resistance and ability to bear weight were not important.

Blocks of coquina have been used to construct walls, small buildings, and monuments. In these uses coquina can last for decades but eventually crumbles and fails. This failure can be delayed if the rock is sealed by plastering or parging.

Read more at:https://geology.com/rocks/coquina.shtml

13/09/2022

Happening Now!!!

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13/09/2022

Are you willing to know how to model rock engineering problems, slope stability, geotechnical and tunnel challenges, sub-level stope mining, and even deep excavation on the existing underground Metro structures?

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09/09/2022

Get to a Mining Company and Opportunities Available: First Quantum Minerals Limited.

First Quantum Minerals Ltd. is a Canada-based company engaged in the production of copper, nickel, gold, silver, zinc, and acid, and related activities including exploration and development.

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08/09/2022

Hello,

Would you mind sparing a few minutes out of your precious time, we have a series of opportunities we want to share with you.

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As a civil, architect, or structural engineer, you must not miss this.

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You might also want to have an understanding of water and wastewater infrastructure design and analysis, reality modeling, cost-effective monopoly design, and a lot more.

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Kamal Batcha is a Senior Application Engineer with over 20-plus years of experience working with Industry Owner Operators, Global Engineering & Procurement Contractors across all industries (Building, Plant, Mining Transportation, oil & gas) for the Middle East, North Africa & Turkey region to help them implement best software solutions to overcoming their challenges.

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06/09/2022

FIVE INTERESTING MINERAL FACTS
1. Scientists have stated that there are over 3,000 different types of minerals.
2. The minerals our bodies need are different from the minerals found on Earth. Our body actually needs the elements found within the minerals.
3.
The mineral feldspar covers about 60% of the Earth's crust and is used in the making of ceramics.
4. Mineral crystals are so small that they can only be viewed under a microscope.5. The cooling process of magma determines the size of the crystals that form in a mineral.

05/09/2022

Today on SME Futa Online Content;

MINERAL OF THE WEEK:RHODOCHROSITE

What is Rhodochrosite?

Rhodochrosite is a manganese carbonate mineral that ranges in color from light pink to bright red. It is found in a small number of locations worldwide where other manganese minerals are usually present.

Rhodochrosite is sometimes used as an ore of manganese but is rarely found in economic quantities. Specimens with a wonderful pink color are used to produce highly desirable gemstones.

Rhodochrosite is rarely found as well-formed crystals, so crystals can be extremely valuable as mineral specimens.

Physical and Chemical Properties
Rhodochrosite has a variable chemical composition. It is a manganese carbonate, but the manganese is frequently replaced by iron, magnesium and/or calcium as shown in this formula: (Mn,Fe,Mg,Ca)CO3.

These substitutions of other elements for manganese change the composition and alter the specific gravity, hardness, and color of the mineral. The bright pink color can become grayish, yellowish, or brownish in response to this chemical variability. A complete solid solution series exists between rhodochrosite and siderite (FeCO3).

Rhodochrosite is generally easy to identify and is rarely confused with other minerals. Its pink color, perfect cleavage in three directions, low hardness, and weak effervescence with cold dilute hydrochloric acid are rarely seen in other minerals.

The most common confusion is between the names "rhodochrosite" and "rhodonite" -- both are pink, manganese-rich minerals with very similar names that people have a hard time remembering.

Geologic Occurrence

The formation of rhodochrosite usually occurs in fractures and cavities of metamorphic and sedimentary rocks. It is often associated with silver deposits, and a few silver mines produce rhodochrosite as a byproduct.

Uses of Rhodochrosite

Ore of manganese
Gemstone
Ornamental stone

Read more at:https://lnkd.in/ddtsG6aK

Catherine Rose Roger

29/09/2022

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