Quartzite is a hard, non-foliated metamorphic rock (majorly made of quartz) formed by metamorphosed sandstone which is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Quartzite is usually white to gray in color although some rock units are stained by impurities to become pink, red, purple, yellow, orange, brown, green, or blue. It’s resistant to chemical weathering and often forms bare ridges and
Graphite is a soft crystalline form/polymorph of carbon (atomic number 6 and symbol is C); It has the same chemical composition as Diamond, which is also pure carbon, but differs on molecular structure. It is gray to black, opaque, has a metallic luster, and a black streak. It has both metallic and non-metallic properties and it’s majorly used in high-temperature lubricants, brushes for electrical motors, friction materials, battery and fuel
Open-pit mining is a mining method for near-surface deposits via a surface pit excavated using one or more horizontal benches. Overburden is first removed and benches of set heights excavated to reach the minable depth of the deposit, with the higher benches being larger than the lower ones. The benches are able to control the depth of blastholes, pitwall slope and avert danger posed by highwall slopes. They also provide
Did you know??? Aluminum has always been one of the most common elements in the Earth’s crust, but it has not always been so easily obtained. It was once used as a symbol of status, and was worth more than silver. However, once scientists figured out how to extract aluminum from bauxite ore, aluminum suddenly became much easier to produce, and its value plunged in turn. #Aluminium #mineafrica #miningkenya #mininghubafrica
The Most Dangerous Volcano in the WorldMount Nyiragongo is an active stratovolcano (3,470m above sea level), located inside Virunga National Park, in the Democratic Republic of the Congo, about 20km north of the town of Goma near Lake Kivu and just west Rwandan border. The main crater is about 2 km wide containing an estimated 600m deep lava lake making it one of the biggest fluid lava lakes on Earth.
