Department Seminar Speaker - 04/16/2013 - Steven Shirey, CIW
"Diamonds — unique recorders of continental evolution and mantle geodynamics," Guyot 10, 12:30 p.m.
Continent formation spans most of Earth history and continental rocks retain a geologic record of Earth's past geodynamic processes. Orogenic process on continents concentrate Earth's resources and continental surfaces are key to the emergence of subaerial life. The exhumation of diamonds by erupted kimberlitic magmas passing through continents brings up the deepest, oldest, and most pristine mineral inclusions from the mantle that are known. Most of these specimens come from the mantle keels of continents at depths greater than 150km. Diamonds and their inclusions present a remarkable chance to study deep mantle mineralogy and the migration of carbon-bearing fluids, leading to unique constraints on continent formation and mantle geodynamics.
Location: Guyot Hall - Room 10
Date/Time: 04/16/13 at 12:30 pm - 04/16/13 at 1:30 pm