Presentation Title: He diffusion in calcite, aragonite, and dolomite
Section: Understanding the Past II
Location: McCardell Bicentennial Hall, 303
Date & Time: Friday, April 19, 2013 - 11:35am - 11:50am
Many modern cosmogenic dating techniques are limited by time-consuming and labor intensive mineral or chemical purification procedures which are required to ensure reliable and repeatable age determinations. 3He cosmogenic dating of calcite, aragonite, and dolomite has the potential to provide cosmogenic ages relatively quickly and easily in a range of field environments. However, the primary limitation to applying cosmogenic 3He dating is the poor helium retention observed in many natural carbonates and the lack of understanding regarding helium diffusion behavior in these minerals. One of the first steps to improving our understanding of helium diffusion is to determine the basic trends in diffusion behavior, such as anisotropy. Anisotropy experiments were therefore conducted on the major axes of calcite, aragonite, and dolomite to test for and quantify the direction-specific diffusion rates of 3He atoms through each of these minerals.
Type of Presentation: Individual oral
Presentation Area: Geology
Number of presenters:
Presenter(s): Hobbs, Daniel Joseph
Class Year(s): 2013
Sponsor(s): Amidon, William H.
Dept(s): Geology Department