1 Result(s)

Investigating an impact origin for Hadean zircons from Western Australia

Hadean zircons, found in the Jack Hills, Western Australia, are the oldest known materials on Earth, dating back to nearly 4.4 Ga or only ~150 Ma after formation. These tiny grains have been essential in transforming our view of the Hadean from a hot, hellish environment to one that appears much more hospitable to life with continental crust, water, and possibly even plate tectonics. Understanding the magmatic environment that leads to the formation of these ancient grains is fundamental to interpreting the geochemical signatures within them. Hypothesis of formation environments have ranged from plate boundary interactions to impact melt sheets. One important characteristic of the Jack Hills zircons is their unique inclusion assemblage,...

Required Availability
Spring 2017
Course Credit?
Yes - Geo 399/499
Paid Position?
No
Preferred Majors
Chemistry | Geography | Geology
Keywords
Hadean | Zircon | Geochemistry | early Earth | impacts