Every geoscientist is capable of understanding and applying geochemical data, however, at GeocHemiSTea we understand that there is an incredible amount of nuanc...
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)
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1:14:35
The Sci-Fi and Facts of Orogenic Gold with Rich Goldfarb
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)
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1:21:13
Exploring with pXRF and LIBS with Steve Tambanis
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 analysis in remote settings. Together, they dive into the highs and lows of calibrating and optimizing pXRF and LIBS, discussing the meticulous sample preparation and calibration required to achieve accuracy and reliability, even in challenging field conditions.
From overcoming unexpected hurdles, like creating custom calibration pellets to ensure consistent LIBS results, to exploring the practical limits and advantages of each technology, this episode sheds light on the adaptability required to make these devices work effectively in geochemical exploration. Sam and Steve also touch on the importance of engaging with vendors for technical support and the value of sharing field-tested insights with other users to advance best practices. Whether you're an experienced geochemist or new to the field, Steve's experiences offer invaluable guidance for anyone interested in applying portable assay technologies to improve exploration outcomes.
For this episode we read:
Reliable and Repeated Field Assays
LIBS and pXRF in Lithium Exploration
What does this rock carry - know in the field
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34:43
Upscaling pyrite chemistry with 4-acid data with Aidan Kitchener
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)
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36:32
Geochemical exploration for greenstone gold deposits with Simon Griffiths
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 dedicated to the fans of the show in Dubreuilville (Canada) who wanted some extra insight on geochemistry in greenstones. I hope you enjoy this one!
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 tuned! Lastly are you looking for some Tea/good gossip? We got it.
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