We are thrilled to bring you the top entries from the 2024 SEG Student Chapter Podcast Challenge as a special set of three episodes. This is the third and final bonus episode in this special series. We'll hear two segments that consider ore deposit models and environment of formation for Au deposits, traveling from China to Japan.

Chapter 1: From mineral system to exploration: a case in giant Zaozigou Au-Sb deposits

SEG STUDENT CHAPTER: China University of Geosciences, Beijing (CUG-B)

Host: Jiayi Wang

Guest: Jingyuan Zhang

This podcast episode focuses on the understanding of mineral systems and their role in shaping exploration strategies, with the giant Zaozigou Au-Sb deposits as a case study. Detailed geological mapping, geochronology, fluid inclusion, and structure analysis have revealed the structural framework, precipitation mechanisms, and the separation of gold and antimony in the Zaozigou deposits. These theoretical insights lead to practical exploration advancements in predicting the gold-antimony orebody occurrence, avoiding ineffective engineering practices, and locating the distribution of native gold

Chapter 2: Hot spring deposits - key finder for hidden ore deposits along the Peruvian Andes

SEG STUDENT CHAPTER: SEG - NMSM (Universidad Nacional Mayor de San Marcos)

Hosts: Rosa Razuri Prado and Paula Martinez Segura

Producers: Alvaro Zapata Cornejo, Jean Crisólogo Zapata, Braian Vara Guzman

Guest: Diana Pajuelo Aparicio, Professor at Universidad Nacional Mayor de San Marcos, Peru

Peru is a country well-known for its complex geology, with hot springs distributed along high altitudes surrounded by unconsolidated deposits overlapping exhumed ore deposits. This podcast episode is focused on understanding the presence of economically important metals trapped inside hot spring deposits, revealing a potential key finder for uncovering hidden ore deposits.

Diana Pajuelo, geologist with 11 years of experience in regional geology and geothermal energy, participated in various projects with the Geological Survey of Peru. Her expertise provides a perspective on two types of hot spring deposits, the capacity for hosting metals influenced by biotic or abiotic factors, and the overlap between ore deposits and hot springs along the Andes.

Theme music is Hot Wheel Breakdown by Elliot Holmes stock.adobe.com epidemicsound.com

Adobe Stock ID: #356951050

Come join us in Brisbane, Australia for SEG 2025, September 26-29th. This will be a dynamic conference with cutting edge science, new discoveries, technology and more. Opportunities for networking and learning include several workshops and field trips before and after the event, relaxed social events and of course the conference itself. See you there!

We are thrilled to bring you the top entries from the 2024 SEG Student Chapter Podcast Challenge as a special set of three episodes. This second episode in the mini-series pairs the 2024 Silver the intriguing stories and history shared by an esteemed geologist in Brazil, with a second segment that uncovered the history and mining potential of northern England.

Chapter 1: Title: The Evolution of Geology in Brazil with Reinhardt Fück

SEG STUDENT CHAPTER – University of Brasilia

Hosts: Amanda Rompava and Gustavo D’Amore Heer

Producers: Juliana Berbert and Mariana

Guest: Professor Reinhardt Adolfo Fück

The theme of this episode tells the story behind the articles and mapping work of one of Brazil's greatest geological characters, with special emphasis on the magmatic arc of Goiás in the Brasília belt, where important deposits reside, as well as his significant work on crustal structure, the Tocantins Province, and Goiás Massif.

With a cautious eye and carrying the experience of working with geology since the 1960s, Professor Reinhardt shares with us the unwritten history behind published articles, his perspecitve on the evolution of knowledge in the field and also the importance of mapping for a geology career.

Chapter 2: ‘The Critical Mineral Potential of the North of England’

SEG STUDENT CHAPTER NAME: University of Leeds

Hosts, Lily Dickson and Brayden Pickard

Guests: Dr. James Shaw (structural geologist) and Adam Eskdale (Rio Tinto)

provides an overview of mineral exploration and extraction in our region of the UK, the North of England (Figure 1) and its critical mineral potential. In February 2024, our student chapter hosted a mini-conference on the subject of critical minerals (Figure 2) with talks from companies including British Lithium, the Critical Minerals Association (UK) and Green Lithium. We were inspired to carry out further research into the critical mineral potential of the region we live in, the North of England, which we present in this podcast. At present, the UK does not extract any of the 18 critical minerals on the 2021 list published by the British Geological Survey (BGS). This renders the UK completely reliant on international supply which is a big problem, and one that we must try to address through increased mineral exploration and mining in the near future.

In order to provide a full picture of the critical mineral potential of our region, we explore the rich mining history of the North of England, dating back to the Bronze Age at sites such as Alderly Edge (Figure 3). We also investigate current critical mineral projects: Li exploration around the Weardale Granite and Potash mining near the town of Whitby. Finally, we speak to Dr James Shaw and Dr Adam Eskdale who have worked on fluorspar mineralisation in the South Pennine Orefield and cobalt mineralisation in the Lake District, respectively. They provide insights into these deposits and to potential barriers to their extraction in the future.

A big thank you goes to Dr James Shaw and Adam Eskdale for sharing their expertise with our student chapter!

We are thrilled to bring you the top entries from the 2024 SEG Student Chapter Podcast Challenge as a special set of three episodes. This episode pairs the 2024 Bronze winner with another that explored some of the political and environmental challenges in developing mineral deposits.

Chapter 1: The deposit that brought down a government

SEG STUDENT CHAPTER NAME: The Pennsylvania State University (Penn State)

Co-hosts: Rory Changleng, Alex Cerminaro

Producer: Rory Changleng

Chapter Notes

What mineral deposit became such a politicised commodity that it brought down a government? In this episode, two Penn State students, Rory and Alex, discuss what got them into geology and inspired them as budding economic geologists to begin a new SEG Student Chapter at Penn State. Alex reminisces about how trying to discover gold in his grandmother's garden in Pennsylvania led to his working with an Alaska exploration company to date gold mineralisation using a novel geochemical technique. Rory tells the story of the Ilimaussaq intrusion in Southern Greenland, home of the Kvanefjeld deposit. It was visiting this deposit during undergraduate fieldwork that opened his mind to the turbulent and consequential world of economic geology. Exploiting Kvanefjeld proved so divisive that it drove the collapse of the Greenlandic government. But as the second largest rare earth element deposit on Earth, surely it’s just a matter of time until mining begins?

Chapter 2: Should we Mine the Seafloor?

SEG STUDENT CHAPTER NAME: SEG of Athens

Host: Pavlos Zambras

Guests: Evi Dimou and Revekka Avoukatou

Chapter Notes

Exploring the depths of the ocean for valuable resources presents an alluring frontier in human endeavor: Deep Sea mining. This venture entails a journey into the unknown, facing both mysteries and challenges while uncovering the potential of extracting precious materials from the ocean floor.

The vast expanse of the deep sea, encompassing more than 65% of Earth's surface, harbors immense reservoirs of base metals, precious metals, and critical elements like nickel, copper, cobalt, and manganese. These elements are indispensable for powering the transition towards clean green energy. Whether it's polymetallic nodules or seafloor massive sulfide found at hydrothermal vent fields, these resources offer the promise of driving technological progress and fostering economic development in the years ahead.

However, the pursuit of these underwater treasures is not devoid of controversy. Deep sea mining raises profound concerns regarding its environmental impact, sustainability, and the ethical utilization of Earth's resources. It's crucial to acknowledge that these deep-sea environments host unique life forms not found elsewhere on the planet, including highly complex prokaryotic communities and microbes with exceptional tolerance to acidity and antibiotics.

International regulations governing deep sea mining are still under development, adding to the uncertainty surrounding this practice. Many fear the potential ecological disruption it could bring to an area of our planet that remains largely unexplored. The question arises: Can we afford the environmental and ecological risks associated with deep sea mining? Or, put more simply, should we proceed with mining the seafloor?

What is needed to build geoscience skills for mining and exploration in Africa? This wide-ranging panel discussion highlights industry, academic and government perspectives on establishing enduring relationships with local communities, with a focus on building geoscience and technical capabilities. The discussion explored the development of local technical staff for exploration and mining operations, the role of geological surveys in skill development and the impact of research carried out without local collaboration (‘parachute science’).

Hosted by Anne Thompson, the panel included Kurt House, CEO KoBold Metals, Kombada Mhopjeni, National Program Officer for Natural Sciences (UNESCO Windhoek), Benjamin Mapani, Professor Namibia University of Science and Technology and Franck Twite, Chief Geologist, Kamoa Copper S.A.

The discussion was recorded live in front of the conference audience in the Windhoek, Namibia on the 27 September 2024. We covered

The panel started with introducing themselves and the challenges they face or approaches they take to capacity building (skills training) in their work. The discussion including the following questions:

· How do exploration and mining companies create real change with long lasting community benefit? What makes a difference to community and government relationships?

· What can research and geological survey scientists do to help build global geoscience capacity and support public education?

· What do you think is the most important area to focus on as we look to the future?

· What makes you optimistic for the future of collaboration and our ability to build geoscience capacity?

We covered a lot, insights on the use of data science, how to get high school students interested in geoscience and even how cultural differences can impact our communication with each other.

Theme music is Confluence by Eastwinds
eastwindsmusic.com

Come join us in Brisbane, Australia for SEG 2025, September 26-29th. This will be a dynamic conference with cutting edge science, new discoveries, technology and more. Opportunities for networking and learning include several workshops and field trips before and after the event, relaxed social events and of course the conference itself. See you there!

Namibia is a country of diverse geology and mineral deposits that is also embracing the green energy transition. The diversity of critical minerals and metals and the expansion of green energy sources for mining are all exciting for the future of Namibia.
Namibia is 'elephant country' in more than one way!

The Society of Economic Geologists is thrilled to collaborate with our partners the Geoscience Council of Namibia and the Geological Society of Namibia to host the SEG 2024 conference in Windhoek, September 27-30.

This episode explores the geology and mineral deposits, from the Proterozoic to the present and the mineral potential that exists throughout the country. We hope you will listen in and then join us in Windhoek in a few months!

Anna Nguno, Deputy Director at the Geological Survey of Namibia (GSN), Ministry of Mines and Energy and co-chair of SEG 2024 introduces the episode with a conference teaser: what to expect at the conference, the main themes, technical sessions, field trips, and more.

Geological Mineral and Information System - Namibia (Geological Survey of Namibia)

Next Roy Miller, previous Director of the Geological Survey of Namibia, provides an overview of the regional geology and tectonic history of Namibia, including the mineral deposits and economic potential of the various belts.

• Paleoproterozoic basement rocks contain the 1.2 Haib porphyry deposit.
• Mesoproterozoic rocks in the country are divided into 3 complexes, none of which contain extensive mineralization.
• The Neoproterozoic to Cambrian Damara Supergroup is the most extensive succession in Namibia, contains a wealth of different types of ore deposits, and is found in three belts: 1) the Damara belt in central Namibia; 2) the Kaoko belt in the northwest; and 3) the Gariep in the southwest
• The Carboniferous to Jurassic Karoo Supergroup contains thin lenses of coal and sandstone aquifers.
• Cretaceous continental breakup resulted in Etendeka flood basalts.
• At the end of the Cretaceous the region became semi-arid and the Kalahari Desert began to form. In wetter periods, the Orange River flooded and deposited diamonds from inland to the coast, 90% of which are gem quality and mined today by De Beers.
• From 21 million years ago, sand began to accumulate in major dune fields.

Finally, Mary Barton, Principal Geoscientist at Odikwa Geoservices, talks about her introduction to the field of geology and what a day in the life of a Namibian greenfields exploration geologist looks like. She discusses above ground risks in the country (including lions and cheetahs!), the placer diamond mining industry, and what opportunities the green transition might bring to the country.

Theme music is Confluence by Eastwinds

eastwindsmusic.com

Come join us in Brisbane, Australia for SEG 2025, September 26-29th. This will be a dynamic conference with cutting edge science, new discoveries, technology and more. Opportunities for networking and learning include several workshops and field trips before and after the event, relaxed social events and of course the conference itself. See you there!

Understanding the earth processes that control lithium is key to exploration and developing the resources needed for society and the energy transition. The lightest of the metals, lithium moves easily in fluids and is found in a variety of geologic environments from brines to pegmatites to clays.

Host Anne Thompson explores the geoscience of lithium, assessing what we know and what are the challenges in the quest to supply the lithium needed by human society. Our three guests provide insights into the variety of lithium sources that potentially allow for geographically distributed supply.

We talked first to Rebecca Paisley, a geochemist with WSP Canada, to consider the diversity of lithium bearing brines and the fundamental nature of the metal. Its natural affinity to partition into the liquid phase means that lithium occurs in salty salar brines, a variety of geothermal brines and oil field brines. The value of your brine, however, also depends on the end-product required and the steps needed to extract it from the solution. Rebecca connects the value of lithium in brines to the whole mining circle.

Bob Linnen, Chief Geologist – Lithium, KoBold Metals, spent his academic career studying pegmatites and now continues to develop his ideas through global exploration. The high grades in lithium pegmatites make them appealing targets for exploration, and better positioned to survive big fluctuations in commodity price. Not all pegmatites, however, are created equal and much is still being learned about this important host for lithium resources as the mineral system view evolves.
Koopmans et al., 2023

Lastly, we talked to Tom Benson, VP Global Exploration for Lithium Argentina. Tom thought he was going to be an academic after completing a PhD on Thacker Pass, Nevada, USA, but an opportunity to engage in research and exploration was too good to pass up. His work includes active collaboration with researchers around the world as well as exploration for new deposits. Tom frames the occurrence of lithium in clays at Thacker Pass within the context of volcano-sedimentary systems. The deposit has unique features, including the presence of higher grade illite in addition to lithium-bearing smectite.

Benson et al., 2023

New research globally focused on lithium resources continues to push our understanding and highlight the importance of its volatile nature in the ways in which it is concentrated and trapped.

Next week is the last episode of Season 4 – we will head to Namibia, host to the SEG 2024 conference September 27-30, to explore the diverse geology and mineral deposits and hear about what the conference has in store.

Many thanks to our season 4 sponsor, Anglo American.

Our theme music is Confluence, by Eastwinds.

As our geo-toolkit expands, how can we equip ourselves to deal with these large volumes of highly diverse, dense data that are available and at higher speeds than ever before? This week’s episode is a companion to episode 47 (Core Sensing Technology) and host Britt Bluemel (Global Business Development Manager, ALS GoldSpot Discoveries) is joined by experts in the field of big data wrangling. They discuss considerations when dealing with data from core sensing systems, with the aim of empowering geologists with better decision-making tools throughout the mining value chain.

New out this week is also a great paper in the SEG Discovery Magazine by Anthony Harris and co-authors - Empowering Geologists in the Exploration Process - Maximizing Data Use from Enabling Scanning Technologies. Check it out for diagrams and case studies that demonstrate the use of core scanning technology.

In this week's episode, our first guest, Dr. McLean Trott (Director, Ore Body Knowledge at ALS GoldSpot Discoveries) just completed his PhD on the topic of tackling big data and integration of various data streams, and how to extract the most value from datasets, including image data. Mac also discusses the utility of point measurement compared to line scanning or full core imaging, with an emphasis on fit-for-purpose data, while considering bottom line factors like speed and cost of data acquisition.

Next, we’re joined by Dr. Jack Milton, VP Geology at Fireweed Metals, and he provides the ‘end user’ perspective. Fireweed Metals has used XRF core scanning technology for several years and Jack describes some of the key benefits and real time decision making that is enabled by this technology. Jack also discusses good connectivity for transferring these huge data files (their on-site scanner has its own dedicated Starlink system) and the necessity of high quality calibrations when collecting XRF data in the field.

Our final guest, Brenton Crawford (Datarock’s Chief Geoscientist) cautions us not just to choose the coolest machine, but to select the sensor that’s right for the job. He discusses utilizing scanning data to create geometallurgical domains, and how project success can be increased by including your IT team in the early stages of the conversation.

Next week, Anne Thompson will be back with three exceptional guests, to discuss the geology of lithium and explore three different host environments, brines, clays and pegmatites.

Our theme music is Confluence, by Eastwinds.

Drill core scanning technology is rapidly developing for use in exploration and mining. The future holds great promise if we can leverage all the data sets available from multiple sensors, but critical for success is understanding how the sensors and scanning systems work. What are the right questions to ask when picking our tools? Host Britt Bluemel, Global Business Development Manager for ALS Goldspot Discoveries, discusses three different types of sensors: hyperspectral for mineralogy, X-ray fluorescence (XRF) for elements and laser-induced breakdown spectroscopy (LIBS) for data at the level of atoms.

Setting the scene in the first segment is Cari Deyell, Principal Spectral Geologist, Veracio. Cari takes us through the fundamentals of reflectance spectroscopy and builds out the case for mapping mineralogy from exploration through to mine development and ore body knowledge. The mineralogical data set provided by #spectroscopy can be enhanced when integrated with XRF and RGB photography. This integration will lead to fundamental advances in how we understand and mine ore bodies.

Our next story focuses on the benefits of using XRF scanners on drill core with Michelle Legat, Vice President at GeologicAI. Scanning up to 650m per day, they are able to map the elements present and correlate with grades and minerals. Good data from any system is important and Michelle addresses key parts of the data collection process, to ensure that you get the best possible result. Acquiring XRF data also means a better understanding of mobile and immobile elements, supporting lithogeochemistry and produces some exciting results for exploration programs.

François Doucet founder and CEO of Elemission, joins Britt for the last conversation and takes us through the background of LIBS and how it relates to other well-known geochemical analysis. Francois tells the story of the ground breaking moment of Curiosity landing on Mars in 1999 to the founding of Elemission, applying LIBS to the mapping of drill core. Scanning rates are dependent on the grain size of the minerals, with adjustments to higher speeds for pegmatites and coarse-grained rock. A breakthrough technology that takes the mapping of core down to the level of atoms.

Next week Britt will be back to explore how to handle the volumes of data generated by core scanning systems for use in all parts of the mining value chain.

Our theme music is Confluence by Eastwinds.

Come join us in Brisbane, Australia for SEG 2025, September 26-29th. This will be a dynamic conference with cutting edge science, new discoveries, technology and more. Opportunities for networking and learning include several workshops and field trips before and after the event, relaxed social events and of course the conference itself. See you there!