Bushveld Igneous Complex

Source: This post on Bushveld Igneous Complex (BIC) has been created based on the article “Earth’s Oldest Living Organisms Discovered Trapped in 2-Billion-Year-Old Rock” published in Sciteach daily on 18th October 2024.

Why in news?

Scientists have uncovered pockets of living microorganisms inside a sealed fracture of a 2-billion-year-old rock from South Africa’s Bushveld Igneous Complex.

About Bushveld Igneous Complex (BIC)

1. The Bushveld Igneous Complex (BIC) located in northern South Africa. It is one of the world’s most significant geological formations. It was formed around 2 billion years ago during the Paleoproterozoic era.

2. The BIC is renowned for its immense deposits of platinum-group metals (PGMs), chrome, vanadium, and other critical minerals.

3. It covers an area of approximately 66,000 square kilometers. The BIC is one of the largest igneous intrusions globally.

4. Its layered structure, resulting from the cooling and crystallization of magma, is divided into four distinct limbs: the Eastern, Western, Northern, and Southern (or Far Western) limbs.

5. These surround a central basin, giving the formation a roughly circular shape. The complex is stratified into several key zones, including the Upper, Main, Critical, and Lower Zones.

6. The Critical Zone containing the Merensky Reef and UG2 Chromitite Layer holds the most valuable mineral deposits, particularly PGMs.

7. The BIC is globally significant due to its rich PGM reserves, including platinum, palladium, rhodium, and others, which are vital for industries such as automotive, electronics, and high-tech applications.

8. The complex holds about 75% of the world’s platinum reserves. The BIC is a major source of chromite, essential for stainless steel production, and vanadium, which is used to strengthen steel and in battery technology.

UPSC Syllabus: Science and technology