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Geochronology and bulk sediment geochemistry of the Late Cretaceous maar lake sedimentary fill of the Wombat kimberlite pipe, subarctic Canada
DownloadSpring 2020
The Wombat pipe (64.918° N, 110.447° W) is a diamondiferous kimberlite in the Lac de Gras kimberlite field of Northwest Territories, Canada. Two drill cores, CH93-29 and 00-05, intersect the Wombat crater facies and include 195 m of well preserved, undisturbed lake sediment fill. Bulk sediment...
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Refining the geochronology and paleoenvironmental significance of key tephra beds in Yukon and Alaska
DownloadFall 2024
Developing precise analytical tools for dating young volcanic deposits (under 3 million years old) is essential for constructing Quaternary chronological frameworks. This dissertation presents an improved method for determining eruption ages of volcanic ash (tephra) deposits in the ice-age...