May 02, 2019


04:00 PM - 08:00 PM
NRB-128

The Montana Tech Public Lecture Series presents John Ridley.

John Ridley will present An ore deposit geology perspective for revisiting the lamprophyres and related rocks of the Montana alkaline province, May 2 at 4 p.m. in NRB-128.

Lamprophyres are a widespread component of the Paleogene Central Montana alkaline province and are locally associated with the Boulder Batholith. Lamprophyres host the Yogo sapphire deposit and are spatially and temporally related to some gold and gold-copper deposits, suggesting that lamprophyric magmas could be a source of hydrothermal fluids, allowing lamprophyres to be used to guide prospecting. Even if lamprophyres are not ore fluid sources, it is of interest to explore which features of lamprophyres relate to prospectivity. I argue that lamprophyres provide unique windows into ore forming processes in the deeper crust and upper mantle and can help us formulate genetic ore formation models.

John Ridley has held the MacCallum Chair of Economic Geology at Colorado State for 14 years, after earlier faculty positions in Australia, Switzerland and Zimbabwe. He recently published the comprehensive textbook “Ore Deposit Geology”. His research applies field studies, structural geology, petrology, fluid inclusion studies and geochemistry to ore deposits and their environments. He received a B.A. in Geology from The University of Cambridge and a Ph.D. from The University of Edinburgh

All lectures are free and open to the public. 

Click on the link to see the full spring 2019 public lecture series speakers and schedule.