World's biggest trove of gold built by ancient 'secret agents'

February 5, 2015 12:15 PM

3 0

World's biggest trove of gold built by ancient 'secret agents'

A layer from a reef found in the Witwatersrand deposit. The black carbon layer contains bonanza-grade gold as tiny inclusions, as well as pyrite and quartz pebbles. The base is formed from an ancient microbial mat. A new theory proposes that a (Christoph A. Heinrich, adapted from Nature Geoscience, 2015.)

The new theory may explain why there's a string of gold beds in the Witwatersrand basin, near Johannesburg, South Africa, that collectively make up 40 percent of all of the gold that has ever been, or ever will be, dug out of the ground, said study author Christoph Heinrich, a geologist at the ETH Z...

Read more

To category page

Loading...