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PODCAST

GeOCHemISTea

Every geoscientist is capable of understanding and applying geochemical data, however, at GeocHemiSTea we understand that there is an incredible amount of nuance and accumulated knowledge. We are here to break down the impediments towards geoscientists learning more about this exciting field! Are you a student wanting to break into the field? Listen to each episode to see how reknown geochemists got to where they are today. Are you intrigued by integrating geochemistry, but don"t know how? Stay

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All Episodes

00:48:39

Geochemistry Without Borders: A Conversation with...

GeOCHemISTea ·

2025/10/15

Alecos Demetriades, applied geochemist and Chair of the IUGS Commission on Global Geochemical Baselines (2024–2028), joins GeOCHemISTea to unpack the Global Geochemical Reference Network (GGRN): why a 160×160 km grid matters, how harmonized sampling/analysis underpins trustworthy baselines, and what QA/QC must look like before interpretation. We touch on FOREGS, leveling national datasets to global references, and practical ways exploration and mining teams can access, use, and contribute to these

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00:56:05

Geochemical exploration in low sulfidation epithermal...

GeOCHemISTea ·

2025/09/10

This month on GeOCHemISTea, we welcome back Simon Griffiths, Principal Consultant at Third Planet Exploration Services, to unpack the geochemical exploration strategies for low-sulfidation epithermal systems. From vein textures to vanadium-rich roscoelite halos, Simon walks us through practical strategies for geochemical targeting and alteration mapping. He shares insights into sampling, spectral workflows, and how roscoelite at Porgera became one of the most reliable vectors to high-grade gold

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00:58:58

From Sardis to the lab: a gold assay deep dive with...

GeOCHemISTea ·

2025/08/13

In this episode of GeOCHemISTea, we're joined by Hugh De Souza to explore the evolution of gold analysis; from 4,000-year-old fire assay traditions to disruptive technologies like photon assay. With over 40 years at research and industry analytical labs and deep experience in mineralogy, geochemistry, and lab innovation, Hugh shares his unconventional path into analytical geochemistry, breaks down the physics behind modern methods, and reflects on what the future holds for gold assay. Whether

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00:53:27

Fine Fractions & Big Discoveries: A Deep Dive into...

GeOCHemISTea ·

2025/07/09

This month on GeOCHemISTea, we are talking about one of exploration geochemistry’s most foundational, and rapidly evolving, methods: stream sediment sampling. Sam is joined by geochemical consultant and educator Mary Doherty, lead author of a 2023 review on stream sediment geochemistry, published in Geochemistry: Exploration, Environment, Analysis.Mary shares a career’s worth of field, lab, and leadership experience, from carrying samples for her USGS geologist father as a child to building geochem

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01:02:15

Into the Plume: Hydrothermal Geochemistry and Alvin...

GeOCHemISTea ·

2025/06/11

In this episode of GeOCHemISTea, we're diving deep, literally, with Andy Campbell, oceanographer, geochemist, and former senior leader at the U.S. Nuclear Regulatory Commission. Andy takes us back to his PhD days at Scripps Institution of Oceanography, where he conducted some of the earliest geochemical research on seafloor hydrothermal systems in the Guaymas Basin. His work on manganese cycling, water column anomalies, and hydrothermal plume modeling not only helped lay the foundation for

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01:29:56

Geothermal Geochemistry and the Roads Less Taken with...

GeOCHemISTea ·

2025/05/15

In this episode of GeOCHemISTea, Sam sits down with geochemist and geothermal expert Stuart Simmons to discuss the unpredictable paths that shape a career in geoscience. From early work in epithermal gold systems to pioneering research in geothermal energy, Stuart shares how professional pivots, academic curiosity, and a chance encounter at a pub in New Zealand all influenced his decades-long contribution to both industry and research. The conversation also dives into the geochemistry of geothermal

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01:04:00

Probing paleorecords to understand future climates...

GeOCHemISTea ·

2025/04/09

Join us this month on GeOCHemISTea as we sit down with Brittany Hupp, Assistant Professor at George Mason University in the Department of Atmospheric, Oceanic, and Earth Sciences. Brittany specializes in micropaleontology, sedimentology, and low-temperature geochemistry, exploring ancient climates and ocean conditions to better understand modern environmental challenges.In this episode, Brittany shares her unconventional path into geosciences—from a dairy farm in rural Ohio to oceanic research

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01:07:09

Dynamic mapping of tailings oxidation with Oscar...

GeOCHemISTea ·

2025/03/12

This month GeOCHemISTea talks with Oscar Benavente, an environmental geochemist at SRK Consulting, about using satellite imagery to monitor mine drainage and environmental change. They dive into how Google Earth Engine, Python, and machine learning are transforming geochemical monitoring—mapping water bodies, tracking sulfide oxidation, and improving mine site remediation.Oscar shares insights from his career spanning geothermal exploration, environmental geochemistry, and consulting. They also

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00:58:58

The trials and tribulations of historic geochemistry...

GeOCHemISTea ·

2025/02/12

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

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01:14:35

Avoiding sub-optimal sampling with Mark Arundell

GeOCHemISTea ·

2025/01/08

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

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01:21:13

The Sci-Fi and Facts of Orogenic Gold with Rich Goldfarb

GeOCHemISTea ·

2024/12/11

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

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00:34:43

Exploring with pXRF and LIBS with Steve Tambanis

GeOCHemISTea ·

2024/11/13

In this episode of GeOCHemISTea, host Sam Scher sits down with Steve Tambanis, Managing Director at STX Consulting and Director at RealTime Priority Limited, to explore the challenges and innovations in field-based geochemical analysis using portable XRF (pXRF) and laser-induced breakdown spectroscopy (LIBS). Steve shares his journey from traditional exploration geology to pioneering real-time assays, recounting how he and his team set out to develop a portable field laboratory for immediate sample

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00:36:32

Upscaling pyrite chemistry with 4-acid data with...

GeOCHemISTea ·

2024/10/09

Let's learn about upscaling LA-ICP-MS pyrite results to whole rock geochemistry data using PCA. On the way we'll hear about the life and times of an early career geochemist and some of the ins and outs of being a geochemical consultant. For this episode we read: Using whole rock and in situ pyrite chemistry to evaluate authigenic and hydrothermal controls on trace element variability in a Zn mineralized Proterozoic subbasin (Magnall et al., 2022) --- Support this podcast:

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00:45:27

Geochemical exploration for greenstone gold deposits...

GeOCHemISTea ·

2024/09/11

For this episode we read: Archean Lode Gold Deposits in Ontario (Colvine et al., 1984) aka the Greenstone Bible.We talk about Simon's transition from working from large mining companies to opening his own consultancy for all those considering this as part of their future. Our tea... have you ever been late to your flight, anxious on the shores of Lake Victoria, Tanzania? As for the heart of the show? We talk about the applications of geochemistry to greenstone gold exploration. This one is

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00:26:11

Seeing porphyries in a new light with Cristal Palafox

GeOCHemISTea ·

2024/08/14

This is our second episode on GeOCHemISTea where we have branched out from geochemistry into a sister geoscience - spectral geology. For this episode take a look at another of the spectral ecosystem's end-members: hyperspectral core imaging.Join us as we talk about hyperspectral imaging, the data load, and some interesting applications to porphyry geoscience. For this episode we read: Hyperspectral Core Imaging Applications in Porphyry Deposits (Corescan) --- Support this podcast:

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01:06:02

Analytical Geochemists & Instrumentation with Alan...

GeOCHemISTea ·

2024/07/10

Herein we present a general microanalytical technique rant, at least three soap boxes (my favorite being "I want to also rant about bulk chemistry techniques and why if these techniques are “so routine” that we still have some labs that suck at understanding (or respecting) how to do basic chemistry well"), and the story of how a geologist with a graduate degree in geochemistry found themself crushing rocks at the USGS and living in both Omaha, Nebraska and ::shudder:: Newark, New Jersey

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00:57:09

The future of remote sensing in exploration with Sam...

GeOCHemISTea ·

2024/06/12

This is our first episode on GeOCHemISTea where we have branched out from geochemistry into a sister geoscience - spectral geology. For this episode we start from one of the spectral ecosystem's end-members: remote sensing, or satellites and airborne. Join us as we talk about the newest developments in sensor tech and data processing, while still paying proper attention to the role of remote sensing in the mining value chain. For this episode we read: Improvements in Mineralogical

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00:12:44

Outtakes with Rob Bowell

GeOCHemISTea ·

2024/05/08

Want to hear some more of Rob's thoughts? But also just general silliness from before we started to record? Enjoy! --- Support this podcast: https://podcasters.spotify.com/pod/show/geochemistea/support

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01:13:09

Geochemistry, nature's gift to mine closure with Rob...

GeOCHemISTea ·

2024/05/08

For this episode we read Rob's paper: Natural attenuation in the vadose zone: Nature's gift to mine closure (Bowell, 2023) From rethinking the green economy to recovering metals and ores in naturally occurring ways, this episode encompasses a lot of topics currently in the news but a uniquely Rob perspective. Along the way, we may even learn about the vadose zone and the potential to remediate sites naturally. --- Support this podcast:

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01:08:10

Sensor and method selection with Ben Chi

GeOCHemISTea ·

2024/04/10

At GeOCHemISTea we love it when someone is so passionate about their geochemistry topic that they reach out and request(!!) to be on the show. An honor, Ben! So what ground did we cover... manifest your own destiny (or was that the US in the 1800s?). Ben has been a geochemist, a geophysicist, and a data scientist; there's lots of nuggets in there for young geos who are looking for the how-to... so how did Ben become a geochemist? Our topic of interest this month was to talk about methodology

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47 results

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