U/Pb zircon ages of Saltese Upland Conservation Area, Priest River Core Complex
Faculty Mentor
Chad Pritchard
Presentation Type
Poster
Start Date
5-8-2024 9:00 AM
End Date
2024 10:45 AM
Location
PUB NCR
Primary Discipline of Presentation
Geosciences
Abstract
The Saltese Upland Conservation Area provides a window into the Priest River Core Complex with Lake Hauser gneiss grading to migmatite, garnet-baring amphibolite juxtaposed with granitic to orthogneiss rocks. U/Pb ages from LA-ICP-MS of separated zircon grains show trends very similar to detrital 207Pb/206Pb ages of the Belt Supergroup. The amphibolite displays a much stronger peak at 1.4 to 1.5 Ga , possibly related to the emplacement of Mesoproterozoic dikes. The amphibolite and granitic rocks also contain a number of grains with 238U/206Pb around 60 Ma preserving events from the uplift of the Priest River Complex in the Spokane area. The Saltese Uplands are a very common location for sharing natural sciences to the public, so these results help decipher the history of a part of the Priest River Core Complex and also provide data and support to develop a story for the public to understand complex geologic areas.
Recommended Citation
Lawrence, Jessica M.; Potter, Natalie; and Pritchard, Chad, "U/Pb zircon ages of Saltese Upland Conservation Area, Priest River Core Complex" (2024). 2024 Symposium. 37.
https://dc.ewu.edu/srcw_2024/ps_2024/p1_2024/37
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
U/Pb zircon ages of Saltese Upland Conservation Area, Priest River Core Complex
PUB NCR
The Saltese Upland Conservation Area provides a window into the Priest River Core Complex with Lake Hauser gneiss grading to migmatite, garnet-baring amphibolite juxtaposed with granitic to orthogneiss rocks. U/Pb ages from LA-ICP-MS of separated zircon grains show trends very similar to detrital 207Pb/206Pb ages of the Belt Supergroup. The amphibolite displays a much stronger peak at 1.4 to 1.5 Ga , possibly related to the emplacement of Mesoproterozoic dikes. The amphibolite and granitic rocks also contain a number of grains with 238U/206Pb around 60 Ma preserving events from the uplift of the Priest River Complex in the Spokane area. The Saltese Uplands are a very common location for sharing natural sciences to the public, so these results help decipher the history of a part of the Priest River Core Complex and also provide data and support to develop a story for the public to understand complex geologic areas.
