Utilizing meteoric 10Be to define the mobile-stable regolith boundary within unconsolidated sediment

Simple item page
dc.contributor.authorPatton, NRen_AU
dc.contributor.authorShulmeister, Jen_AU
dc.contributor.authorFujioka, Ten_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorSimon, KJen_AU
dc.contributor.authorWilcken, KMen_AU
dc.date.accessioned2023-01-19T23:33:38Zen_AU
dc.date.available2023-01-19T23:33:38Zen_AU
dc.date.issued2021-11-17en_AU
dc.date.statistics2022-06-03en_AU
dc.description.abstractUnderstanding the physico-chemical properties of soil profiles are fundamental to evaluate longterm landscape evolution in response to climate, tectonic and human activities. The thickness of the mobile regolith; the portion of the soil profile that is experiencing down slope movement, is a key parameter controlling soil production and erosion rates on hillslopes. However, delineating the interface between the mobile and stable boundary is difficult, specifically in thick (>1 m) unconsolidated sediment profiles. In this study we evaluate the utility of in situ and meteoric 10Be depth profiles to define the mobile-stable regolith boundary at the Cooloola Sand Mass coastal dune fields, Australia. Our results indicate a fairly uniform profile for in situ 10Be concentrations, suggesting the profile is largely dominated by inheritance thus not appropriate for this application. In contrast, meteoric 10Be concentration displays a humped profile, where the concentration significantly increases near the boundary of A(E)- and B-horizons. This observation is largely consistent with the qualitative field observation of the mobile-stable boundary. Despite these positive outcomes, however, it is still uncertain whether the observed meteoric 10Be soil profile reflects the mobile-stable boundary or other changes in physiochemical characteristics (e.g., bulk density, bioturbation, zone of illuviation). Consequently, work is being undertaken to test this approach on other dunes of varying ages (0.5, 2, 5, and 10 ka) in the same area that represent different soil maturity stages and thus variable degrees of physical/chemical evolution of soil profiles. If successful, the development of this new method will be utilized to quantify the mobile regolith layer, which can then be used to create mass balance models of soil erosion and deposition in landscape evolution studies. It will control an important, previously difficult to define parameter in soil production and erosion studies. © The Authorsen_AU
dc.identifier.citationPatton, N., Shulmeister, J., Fujioka, T., Fink, D., Simon, K., & Wilcken, K. (2021). Utilizing meteoric 10Be to define the mobile-stable regolith boundary within unconsolidated sediment. Paper presented to the 15th International Conference on Accelerator Mass Spectrometry. ANSTO Sydney, Australia. November 15th – 19th, 2021, (pp. 89). Retrieved from: https://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.conferenceenddate19 November 2021en_AU
dc.identifier.conferencename15th International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceSydney, Australiaen_AU
dc.identifier.conferencestartdate15 November 2021en_AU
dc.identifier.pagination89en_AU
dc.identifier.urihttps://ams15sydney.com/wp-content/uploads/2021/11/AMS-15-Full-Program-and-Abstract-Book-R-1.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14434en_AU
dc.language.isoenen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectBeryllium 10en_AU
dc.subjectSoilsen_AU
dc.subjectGeochemistryen_AU
dc.subjectErosionen_AU
dc.subjectSlope stabilityen_AU
dc.subjectClimatesen_AU
dc.subjectTectonicsen_AU
dc.subjectHumansen_AU
dc.subjectAustraliaen_AU
dc.titleUtilizing meteoric 10Be to define the mobile-stable regolith boundary within unconsolidated sedimenten_AU
dc.typeConference Abstracten_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
AMS-15-Full-Program-and-Abstract-Book-R-1(2).pdf
Size:
4.92 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications