Webinar Details (Archive)

SEG Lecturers Virtual Symposium 2023

Date: Thursday, December 7, 2023

Time: 2:00pm - 6:35pm MST (UTC-7)

Location: Online using Zoom

This free symposium will consist of four 50-minute lectures, each followed by a moderated 10-minute Q&A session with the audience. The webinar is available at no cost to attendees. Advance registration is required.


The 2023 SEG Distinguished and Traveling Lecturers are providing a virtual symposium showcasing their premier talks and offering a great opportunity for a worldwide audience to engage with them through immersive presentations and interactive discussions. Each lecturer will provide one 50-minute presentation followed by a question and answer session.

The SEG Lecturers are globally recognized individuals that serve as ambassadors for the Society. Lecturers are excellent speakers selected each year based on their significant contributions to the field of economic geology. The SEG Distinguished Lecturer and Traveling Lecturer Programs provide support for the lecturers to present to SEG Student Chapters, universities, and minerals industry events around the world. This symposium will continue the mission of the program to reach a broader audience, especially to students and early career professionals.


Start Time (MST; UTC-7) Title Speaker
2:00pm Welcome and introductions Valeria Nogales, Moderator
2:05pm SEG updates and Lecturers Program overview Jennifer Craig, SEG Executive Director
2:10pm Unconventional magmatic sulfide systems: Looking outside of the box for the next new Ni-Cu-PGE discovery David Holwell, SEG Distinguished Lecturer
3:00pm Q&A with David  
3:10pm Geometallurgy — discovery to closure Kathy Ehrig, International Exchange Lecturer
4:00pm Q&A with Kathy  
4:10pm Break
4:25pm 2023 summary comments Stuart Simmons, SEG President
4:30pm Geological characteristics and genetic types of rare metal deposits in China Shao-Yong Jiang, Regional Vice President Lecturer
5:20pm Q&A with Shao-Yong  
5:30pm The Mineral Systems approach to exploration — are we capitalizing on its promise and avoiding its pitfalls? Sally Goodman, Thayer Lindsley Visiting Lecturer
6:20pm Q&A with Sally  
6:30pm Upcoming goals and initiatives for 2024 Stephen Piercey, 2023 SEG President-Elect
6:35pm Adjourn

SEG Distinguished Lecturer


David A. Holwell

SEG Fellow

Talk Title

Unconventional magmatic sulfide systems: Looking outside of the box for the next new Ni-Cu-PGE discovery

David Holwell is Professor of Sustainable Mineral Resources in the Centre for Sustainable Resource Extraction at the University of Leicester, UK. He completed his Ph.D. research at Cardiff University on the Platreef deposit in the Bushveld Complex, and, after three years working as a consultant exploration geologist on a range of commodities across the globe for SRK Exploration Services, he joined Leicester in 2009. His main research areas focus on magmatic ore deposits, especially Ni-Cu-Co-platinum group element (PGE) sulfides, including PGE deposits in the Bushveld and Skaergaard Complexes, and a range of Ni-Cu sulfide systems across the globe, with a specialization in southern Africa. He has led, and been involved in, numerous projects funded by NERC in the UK and by global industry, including BHP and Anglo American, that apply fundamental geoscience to exploration targeting and the understanding of orebodies and the crustal cycling and concentration of critical metals required for the energy transition. Most recently, he has been researching more unconventional Ni-Cu-Co-PGE-Te systems and investigating the links between the magmatic sulfide mineral system and porphyry epithermal deposits at a translithospheric scale. He is a Fellow of the SEG and an Associate Editor of Economic Geology, most recently guest editing the Special Issue in memory of the late Tony Naldrett.

International Exchange Lecturer


Kathy Ehrig

SEG Member

Talk Title

Geometallurgy — discovery to closure

Kathy Ehrig completed her Ph.D. degree in geology at the University of California-Berkeley in 1991. She left San Francisco in 1992 to commence working on the genesis of the Olympic Dam deposit in Australia and to provide mineralogical support for the Olympic Dam processing plant. In 2006, she moved to Adelaide to lead the development of the Olympic Dam geometallurgy program. However, she has remained focused on using mineralogy to solve processing issues, unraveling the complex geologic history of the Olympic Dam deposit, and using deposit-scale geologic/mineralogical insights as inputs into discovering new iron oxide copper-gold deposits. She has cosupervised 14 Ph.D. students and nine postgraduate researchers working on Olympic Dam based projects. She has shared the geologic/geometallurgical knowledge gained from Olympic Dam and surrounding prospects by authoring or co-authoring more than 125 published papers and delivering mor than 65 presentations.

She received the 2017 Professional Excellence Award from the Australasian Institute of Mining and Metallurgy (AusIMM) and a degree of Doctor of Science honoris causa from Flinders University in recognition of her contribution to the geologic and geometallurgical understanding of the Olympic Dam deposit. Other awards include the Geological Society of Australia Bruce Webb Medal (2018), the Society of Economic Geologists Silver Medal (2020), the Australian Geoscience Council Roy Woodall Medal (2020), and the Australian Academy of Sciences Haddon Forrester King Medal (2022). She is a chartered professional of the AusIMM.

Thayer Lindsley Visiting Lecturer


Sally Goodman

SEG Member

Talk Title

The Mineral Systems approach to exploration — are we capitalizing on its promise and avoiding its pitfalls?

Sally Goodman is Vice-President of Generative Exploration for Newmont, spearheading the drive to discovery across the company’s global portfolio of early-stage exploration projects. Before joining Newmont, she was Chief Geoscientist with Atlantic Gold, following five years with Goldcorp in a variety of corporate technical positions. Prior to that she traveled globally as a consultant in structural geology with SRK Consulting, after holding various lecturing and research posts in universities in Canada and the UK. She has a Ph.D. degree in economic geology and an M.Sc. degree in mineral exploration from the Royal School of Mines, London (UK), and a B.Sc. degree in geological sciences from Leeds University (UK).

Newmont is the world’s leading gold company and a producer of copper, silver, zinc, and lead. Newmont was founded in 1921 and has been publicly traded since 1925. With a head office in Denver, Colorado, the company has a world-class portfolio of assets in North America, South America, Australia, and Africa.

Regional Vice President Lecturer


Shao-Yong Jiang

SEG Member

Talk Title

Geological characteristics and genetic types of rare metal deposits in China

Shao-Yong Jiang is a professor of economic geology and geochemistry at the China University of Geosciences (CUG), Wuhan, China. He is currently the assistant president of the CUG-Wuhan and director of the Innovative Research Center for Exploration of Strategic Mineral Resources.

Prof. Jiang graduated from Peking University in 1984 with a B.Sc. degree and in 1987 with an M.Sc. degree. He received his Ph.D. degree from Bristol University (UK) in 1996 and then worked at the Max-Planck Institute for Chemistry in Germany as a Humboldt Fellow and postdoctoral researcher from 1997 to 1999. He joined Nanjing University in 1999 as a full professor and acted as the director of the State Key Laboratory of Mineral Deposits Research in Nanjing for 10 years. He joined CUG-Wuhan in 2013. Prof. Jiang is an outstanding Chinese geologist in the field of geochemistry of mineral deposits. He has published more than 300 papers in international peer-reviewed journals, including Nature, Geology, and Economic Geology, and is recognized by Elsevier as a highly cited scholar in Earth and Planetary Sciences (2014-present).

Symposium Moderator


Valeria Nogales

SEG Student Member, Cornell University

Valeria Nogales, a geological engineer from Ecuador, has a specialization in Climate Change, Biodiversity, and Ecosystem Services Policies. She is currently pursuing a Master of Science degree in Geological Sciences at Cornell University and is involved in the "CUBO" project. Specifically, she is working on the mineral characterization of a deep geothermal borehole in New York State.

She has previously worked as a research assistant in a UK government-sponsored project called "Tomorrow's Cities" as an independent consultant and as a geoscientist at Halliburton. Valeria is an active member of professional associations such as the Society of Economic Geologists. Additionally, she serves as the vice president of the Graduate and Professional Women's Network at Cornell.


Registration for this event has closed.

Invite an SEG Lecturer

Interested in learning more about the SEG Lecturer Program? Please visit the lecturer webpage for additional details.

2023 SEG Lecturers

Group photo of lecturers and students in a classroom
12/7/2023 2:00 PM - 6:35 PM
Online using Zoom