Gold’s origin story: from kilonova to crust

Gold’s story does not begin in a mine, or even on Earth. Gold was forged in extreme astrophysical events through the r-process, a rapid neutron-capture process. Observations linked to GW170817 and the kilonova that followed gave major support to the idea that neutron-star mergers are a major source of the universe’s heavy elements.

When the early Earth formed, it separated into metallic and silicate layers. In that process, much of the planet’s original gold, as a siderophile or “iron-loving” element, was drawn down into the core. Gold in the crust is therefore both scarce and highly diluted, with a later veneer of meteoritic material and long geological recycling through the mantle and crust helping shape the distribution we see today.

That is why gold mining is fundamentally a concentration game: geology has to take an almost vanishing background presence and focus it into something economically significant.

That is where Clogau fits into the bigger picture. The Dolgellau Gold Belt is recognised as a mesothermal gold-lode system, with steep ribboned quartz-sulphide-carbonate veins hosted by Cambrian rocks, including black carbonaceous shales and associated greenstones. In other words, Clogau is part of the second chapter in gold’s story: not cosmic creation, but geological concentration.

Resources

The Unfolding Story of a Kilonova Told in X-rays

NASA: Where Does Gold Come From? NASA Data Has Clues

NASA: Missions Catch First Light from a Gravitational-Wave Event

Kasen et al. (2017), Origin of the heavy elements in binary neutron-star mergers from a gravitational-wave event

Geology Wales: The geology of the Dolgellau Gold-belt

#AlbaMineralResources #WelshGold #GoldGeology #ResponsibleExploration #MiningHistory #Geology