Webinar Details (Archive)

Brian J. Skinner and Waldemar Lindgren Lectures

Date: Wednesday, January 29, 2025

Time: 2:00pm - 4:00pm MT (UTC-7)

Location: Online using Zoom

Format: Two 45-minute lectures with each being followed by a 15-minute moderated Q&A session

Presenters: Federico Cernuschi (2024 Brian J. Skinner Award Recipient) and Bertrand Rottier (2024 Waldemar Lindgren Award Recipient)

Moderators: David Cooke and Morgan Roy

Description

This free webinar will feature insightful lectures and discussion by the 2024 recipients of the SEG Brian J. Skinner and Waldemar Lindgren awards, showcasing their innovative and widely recognized research in the field of economic geology. Each awardee will present a 45-minute lecture focused on various aspects of the porphyry model, followed by an in-depth Q&A session led by David Cooke, Editor of Economic Geology.

The Brian J. Skinner Award is presented annually to the author(s) of an outstanding paper published in Economic Geology in recognition of the most innovative and original paper appearing in any of the eight issues of a single volume of the journal. Papers are judged on technical excellence, innovation, and impact on the science of economic geology.

The Waldemar Lindgren Award is presented annually to an individual in recognition of research published within 8 years of their terminal degree that represents an outstanding contribution to economic geology.

Presenters

A Reevaluation of the Timing and Temperature of Copper and Molybdenum Precipitation in Porphyry Deposits

This talk will review the geologic characteristics of shallowly formed A-vein-type porphyry deposits and deeply formed early-halo-type deposits. We will discuss the formation timing of different generations of crosscutting vein and halo types, their relationship with Cu-Fe and Mo sulfides, and their spatial zonation across the vertical extent of porphyry deposits. In this context, we will discuss microscopic observations of mineralogy, using petrography, QEMSCAN, and SEM-CL imaging of quartz in veins to reevaluate different hypotheses for the introduction and precipitation of Cu and Mo in porphyry deposits.

Read the Paper

Federico Cernuschi

Eclectic Rock

Brian J. Skinner Award recipient for 2024

Biography

Quartz Texture and Chemistry: A Good Tracer of the Mineralizing Fluid Evolution?

The porphyry system is characterized by quartz-dominated veins formed by fluids having variable chemistry and a large range of pressure and temperature. This presentation will document the power of the texture, trace element, and stable isotopic composition of quartz as a tracer of the fluid evolution but also its important limitations.