Historical geochemical datasets can be challenging with variable methods, missing metadata, and shifting detection limits, but they’re also an invaluable resource for mineral exploration and mining.

In this episode, we break down what qualifies as historical data, common pitfalls to watch for, and best practices for integrating legacy datasets into interpretation workflows. We also explore the newest geochemical data from field-portable and scanning technologies, examining how they complement and contrast with traditional datasets.

For this episode we read:

Advances in ICP-MS technology and the application of multi-element geochemistry to exploration (Sader and Ryan, 2019)

Advances in exploration geochemistry, 2007 to 2017 and beyond (Winterburn et al., 2019)

Evaluation of partial digestions for soils to detect a deeply buried VMS Cu-Zn prospect in boreal forests (van Geffen et al., 2014)

Major advances in exploration geochemistry, 1998-2007 (Cohen et al., 2010)

In this episode we talk with Mark Arundell, Principal Geologist at IMEx Consulting, to delve into the past, present, and future of geochemical sampling. With over 30 years of international experience, Mark shares insights into avoiding suboptimal sampling, the importance of understanding regolith, and how smarter techniques can lead to better outcomes in mineral exploration. Whether you're new to geochemistry or a seasoned professional, this conversation is packed with practical advice and thought-provoking discussions on improving exploration geochemistry strategies.

For this episode we read:

Why 80 mesh? (Garrett, 2019)

Metallogeny and mineral exploration - some personal reminiscences (Sillitoe, 2024)

Seeing through alluvial gold - fine fraction stream sediment sampling in the Sofala Area, Central New South Wales (Arundell and Gatehouse, 2004)

In this episode of GeOCHemISTea we dive into the origins of orogenic gold deposits with Rich Goldfarb, exploring the science behind fluids, isotopes, and formation processes. From debunking magmatic theories to highlighting the facts of metamorphic origins, Rich shares the real tea (and quite a number of shenanigans) on how to make an orogenic gold deposit . Join us for a conversation that’s equal parts science and intrigue.

For this episode we read: Orogenic gold: is a genetic association with magmatism realistic? (Goldfarb and Pitcairn, 2022)