Mining Stock Education

Sulfide vs. Oxide Deposits: What Every Copper & Gold Investor Must Know with Dr. Rob Stevens

Mining Stock Education

Show Notes

In this episode of Mining Stock Education, host Bill Powers welcomes Dr. Rob Stevens, author of 'Mineral Exploration and Mining Essentials.' Dr. Stevens presents on what every copper and gold mining investor should know about sulfide vs. oxide deposits. He provides examples, reviews the economic impacts of these deposit types, explains supergene enrichment zones, refractory deposits, laterites and much more. Dr. Stevens' book and online courses are available at miningessentials.com.

00:00 Introduction 01:01 Oxide vs Sulfide 02:08 Defining Deposit Types 06:54 How Processing Differs 09:40 Refractory and Laterites 12:38 Supergene Enrichment 15:55 Economics and Examples 20:13 Investor Checklist 22:54 Q&A

Link to this presentation on YouTube: https://youtu.be/0w9Cz5fTkPo

To learn about Dr. Steven’s book and online training courses: https://www.miningessentials.com/

Dr. Steven’s YouTube channel: https://www.youtube.com/@mining-essentials

Sign up for our free newsletter and receive interview transcripts, stock profiles and investment ideas: http://eepurl.com/cHxJ39

This episode was not sponsored. MSE received no compensation to speak favorably of Rob Stevens’ book and has no revenue-sharing arrangement with Dr. Stevens. Mining Stock Education offers informational content based on available data but it does not constitute investment, tax, or legal advice. It may not be appropriate for all situations or objectives. Readers and listeners should seek professional advice, make independent investigations and assessments before investing. MSE does not guarantee the accuracy or completeness of its content and should not be solely relied upon for investment decisions. MSE and its owner may hold financial interests in the companies discussed and can trade such securities without notice. MSE is biased towards its advertising sponsors which make this platform possible. MSE is not liable for representations, warranties, or omissions in its content. By accessing MSE content, users agree that MSE and its affiliates bear no liability related to the information provided or the investment decisions you make. Full disclaimer: https://www.miningstockeducation.com/disclaimer/

More from Mining Stock Education

Oct 20, 2026

Simon Catt is an Australian resource investor, investment banker, and the writer behind CattCalls.com. As a first time MSE guest, he talks about his early wins and painful losses that shaped how he invests in mining stocks today. Simon shares his rules for selling, and why he thinks this commodity super cycle has years left to run. Listen to the wisdom from this 40-year veteran of junior mining stocks!

Oct 15, 2026

David Erfle joins MSE for his monthly episode. David explains the pullback in gold and silver, what he heard at the Beaver Creek Precious Metals Summit, why he’s moving into discovery-stage explorers, the Roxmore Resource and SSR Mining deal, and whether the TSX Venture chart is signaling a top. Dave also explains the necessary project economics for him to buy a developer right now.

Oct 8, 2026

CEO Richard Osmond explains sponsor Element 29 Resources’ investment value proposition in this episode. Element 29 is a copper explorer in Peru, and its flagship Elida porphyry copper-molybdenum-silver project already has a 321 million tonne inferred resource. Richard says the goal is much bigger. The company wants to double the size of the pit and is targeting a tier-one deposit of more than 1 billion tonnes at about 0.5% copper equivalent, or roughly 5 million tonnes of contained copper. Element 29 is well funded to pursue that goal. It raised about $47 million in 2026, and with roughly $11 million in warrants coming due, it expects a budget of close to $60 million CAD to be spent over the coming years. Support comes from well-respected, strategic investors such as Randy Smallwood, George Brack, Ross Beaty, and Alex Gubbins.

Oct 5, 2026

Bill Powers and co-host Brian Leni sit down for their monthly Junior Mining Insights chat to discuss sector sentiment after the Metals Investor Forum and Beaver Creek Precious Metals Summit. Then they cover a range of topics: glossy direct-mail mining stock promotions, why investors should specialize, when management teams should step aside, name changes and rollbacks, short sellers, visible gold in press releases, and why site visits are becoming essential to Brian's process.

Sep 28, 2026

Returning guest Sultan Ameerali is a self-directed investor who has significantly multiplied his own capital in junior resource stocks since entering the sector almost a decade ago. Fresh off his second year at the invitation-only Beaver Creek Precious Metals Summit, Sultan shares how he approaches conferences to get real intel, how he uses AI as a "first-year analyst" without giving up human judgment, and the due diligence process behind his recent positions. This episode is less about hot picks and more about building a repeatable, operationalized process with real money at risk.

See all episodes →