Ore genesis
Videos
Various theories of ore genesis explain how the various types of mineral deposits form within Earth's crust. Ore-genesis theories vary depending on the mineral or commodity examined.
High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz-gold vein in California's Mother Lode. Specimen is 3.2 cm (1.3 in) wide.
High-grade (bonanza) gold ore, brecciated quartz-adularia rhyolite. Field of view ~10.5 cm across. Native gold (Au) occurs in this rock as colloform bands, partially replaces breccia clasts, and is also disseminated in the matrix. Published research indicates that Sleeper Mine rocks represent an ancient epithermal gold deposit (hot springs gold deposit), formed by volcanism during Basin & Range extensional tectonics. Sleeper Gold Mine, Humboldt County, Nevada.
Citrobacter species can have concentrations of uranium in their bodies 300 times higher than in the surrounding environment.
Tunicates such as this bluebell tunicate contain vanadium as vanabin.
Broken Hill ore deposit
Videos
The Broken Hill Ore Deposit is located underneath Broken Hill in western New South Wales, Australia, and is the namesake for the town. It is arguably the world's richest and largest zinc-lead ore depo
Old Kintore headframe, now a museum exhibit, Broken Hill
Former Delprat mine, Line of Lode, Broken Hill, 2017
Chlorargyrite lining a vug in gossan at Broken Hill
Broken Hill township, backed by the man-made mullock heaps from mining along the Line of Lode