Magnetite orebodies generally means mining lower grade iron ores, crushing and grinding with significant energy costs in processing and the capital costs being significantly higher than for direct shipping ores (DSO). Overseas, the mining and processing of magnetite ores has a long history of ...
Why Obsidian is Black? Pure obsidian is generally black, although the colour differs with the existence of impurity. The jade could be light gray to black with iron and other transformation components. The majority of black obsidians are magnetite-nanoinclusions, iron oxide. Very few obsidian spec...
Porphyry systems supply most copper and significant gold to our economy. Recent studies indicate that they are frequently associated with high Sr/Y magmatic rocks, but the meaning of this association remains elusive. Understanding the association between high Sr/Y magmatic rocks and porphyry-type depo...
(And it is structured, being divided into a more plastic upper mantle which is under relatively little pressure, and a more rigid lower mantle which has less opportunity to flow because it’s compressed so much by all the stuff above it.) The short answer is: earthquakes. By tracking earth...
[0:17:27.1] ___ scanned deposit that also has copper, gold and silver credits, and also a significant magnetite component that can be separated out and sold as a magnetite product. And they had used $115 a ton in that PEA ...