Explore our solutions marketplace

Discover innovation with our solution finder

How does it work?

Learn more about how Axora can help you


Explore our knowledge

Read our expert insights, reports, watch webinars


Explore our community

Share knowledge in our expert community

Join us

Connect, collaborate and chat

About us

Learn more about Axora

Find out more about Axora and our team

Heavy Minerals from Placer Deposits

Placer deposits are accumulations of heavy minerals, like gold, formed by the effects of gravity, which causes them to separate from their parent rock during the weathering process.

When this happens, water transports the minerals downslope into streams, where they concentrate in gravel beds. Here, they’re known as alluvial deposits, and they yield high concentrations of placer gold, cassiterite, platinum, and gemstones.

Other types of placer deposits include eluvial placers, which form on hillslopes via in situ weathering. Here, instead of streams, rain and wind transport the minerals. Meanwhile, beach placers are a result of waves and currents moving heavy minerals towards the seashore, and eolian placers are formed in deserts by wind, which carries the fine mineral particles.

Key fact: The placer deposit in Witwatersrand, South Africa, is the largest gold deposit in the world, having produced over 1.5 billion ounces of gold

Placer mining techniques involve mechanical dredges, which perform large-scale sifting of alluvial deposits to recover placer gold. Other placer operations involve draglines, dozers, and backhoes to excavate the heavy minerals.


  • Recovery of valuable minerals

  • Placer mining is less capital intensive than hard rock mining

  • Placer mining can be implemented on any scale

Explore solutions for Heavy Minerals from Placer Deposits

Unlock transformation

What industry-specific challenges are you facing right now? Talk to us so we can find proven solution to help you.

I want to learn more

Visit our knowledge hub

I want to explore solutions

Visit our solutions catalogue

2022 Globee Award Winner

A bronze award in the 'Startup of the Year: Business Services' category