Articles | Volume 6, issue 4
https://doi.org/10.5194/gchron-6-653-2024
https://doi.org/10.5194/gchron-6-653-2024
Short communication/technical note
 | 
17 Dec 2024
Short communication/technical note |  | 17 Dec 2024

Technical note: An analytical approach for (U–Th) ∕ He dating of goethite by sample encapsulation in quartz ampoules under vacuum, with an example from the Amerasian Basin, Arctic Ocean

Olga Valentinovna Yakubovich, Natalia Pavlovna Konstantinova, Maria Olegovna Anosova, Mary Markovna Podolskaya, and Elena Valerevna Adamskaya

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Cited articles

Ansart, C., Quantin, C., Calmels, D., Allard, T., Roig, J. Y., Coueffe, R., Heller, B., Pinna-Jamme, R., Nouet, J., Reguer, S., Vantelon, D., and Gautheron, C.: (U-Th) / He Geochronology Constraints on Lateritic Duricrust Formation on the Guiana Shield, Front. Earth Sci., 10, 1–19, https://doi.org/10.3389/feart.2022.888993, 2022. 
Bassal, F., Heller, B., Roques, J., Balout, H., Tassan-Got, L., Allard, T., and Gautheron, C.: Revealing the radiation damage and Al-content impacts on He diffusion in goethite, Chem. Geol., 611, 121118, https://doi.org/10.1016/j.chemgeo.2022.121118, 2022. 
Basu, S., Stuart, F. M., Klemm, V., Korschinek, G., Knie, K., and Hein, J. R.: Helium isotopes in ferromanganese crusts from the central Pacific Ocean, Geochim. Cosmochim. Ac., 70, 3996–4006, https://doi.org/10.1016/j.gca.2006.05.015, 2006. 
Benites, M., Hein, J. R., Mizell, K., Farley, K. A., Treffkorn, J., and Jovane, L.: Geochemical insights into formation of enigmatic ironstones from Rio Grande rise, South Atlantic Ocean, Mar. Geol., 444, 106716, https://doi.org/10.1016/j.margeo.2021.106716, 2022. 
Brumley, K., Miller, E. L., Konstantinou, A., Grove, M., Meisling, K. E., and Mayer, L. A.: First bedrock samples dredged from submarine outcrops in the Chukchi Borderland, Arctic Ocean, Geosphere, 11, 76–92, https://doi.org/10.1130/GES01044.1, 2015. 
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Short summary
Goethite is one of the most common Fe-(oxy)hydroxide minerals that is formed during hydrolyzation of rocks, implying it is a desired mineral for dating various surface and subsurface geological processes. Nowadays (U–Th) / He dating of goethite is widely used in geochronological studies. Here, in the example of goethite from the Chukchi Borderland, we introduce a new, simple methodological approach for accurate (U–Th) / He dating of goethite.