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- W4282825442 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Apatite and zircon are among the best-studied and most widely used accessory minerals for geochronology and thermochronology. Given that apatite and zircon are often present in the same lithologies, distinguishing the two phases in crushed mineral separates is a common task for geochronology, thermochronology, and petrochronology studies. Here we present a method for efficient and accurate apatite and zircon mineral phase identification and verification using X-ray micro-computed tomography (microCT) of grain mounts that provides additional three-dimensional grain size, shape, and inclusion suite information. In this study, we analyze apatite and zircon grains from Fish Canyon Tuff samples that went through methylene iodide (MEI) and lithium heteropolytungstate (LST) heavy liquid density separations. We validate the microCT results using known standards and phase identification with Raman spectroscopy, demonstrating that apatite and zircon are distinguishable from each other and other common phases, e.g., titanite, based on microCT X-ray density. We present recommended microCT scanning protocols after systematically testing the effects of different scanning parameters and sample positions. This methodology can help to reduce time spent performing density separations with highly toxic chemicals and visually inspecting grains under a light microscope, and the improved mineral identification and characterization can make geochronologic data more robust." @default.
- W4282825442 created "2022-06-15" @default.
- W4282825442 creator A5082871568 @default.
- W4282825442 date "2022-06-14" @default.
- W4282825442 modified "2023-09-26" @default.
- W4282825442 title "Reply on RC2" @default.
- W4282825442 doi "https://doi.org/10.5194/gchron-2022-7-ac1" @default.
- W4282825442 hasPublicationYear "2022" @default.
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