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High Spatial Resolution 40Ar/39Ar Geochronology of Lunar Impact Melt Rocks


Abstract Impact cratering has played a key role in the evolution of the solid surfaces of Solar System bodies. While much of Earth’s impact record has been erased, its Moon preserves an extensive history of bombardment. Quantifying the timing of lunar impact events is crucial to understanding how impacts have shaped the evolution of early Earth, and provides the basis for estimating the ages of other cratered surfaces in the Solar System.

Many lunar impact melt rocks are complex mixtures of glassy and crystalline “melt” materials and inherited clasts of pre-impact minerals and rocks. If analyzed in bulk, these samples can yield complicated incremental release 40Ar/39Ar spectra, making it challenging to uniquely interpret impact ages. Here, I have ... (more)
Created Date 2017
Contributor Mercer, Cameron Mark (Author) / Hodges, Kip V (Advisor) / Robinson, Mark S (Committee member) / Wadhwa, Meenakshi (Committee member) / Desch, Steven J (Committee member) / Hervig, Richard L (Committee member) / Arizona State University (Publisher)
Subject Geology / Planetology / Geochemistry / 40Ar/39Ar Geochronology / Apollo 16 / Apollo 17 / Lunar Impact Melt Rocks
Type Doctoral Dissertation
Extent 388 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Geological Sciences 2017
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis