Variability in Bioavailable 87Sr/86Sr in the North American Midcontinent
dc.contributor.author | Widga, Chris | |
dc.contributor.author | Walker, J. Douglas | |
dc.contributor.author | Boehm, Andrew | |
dc.date.accessioned | 2018-11-16T19:24:11Z | |
dc.date.available | 2018-11-16T19:24:11Z | |
dc.date.issued | 2017-06-07 | |
dc.identifier.citation | Widga, C., Walker, J.D. and Boehm, A., 2017. Variability in Bioavailable 87Sr/86Sr in the North American Midcontinent. Open Quaternary, 3(1), p.4. DOI: http://doi.org/10.5334/oq.32 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/27386 | |
dc.description.abstract | Strontium (Sr) isotope tracers are useful for understanding provenance and mobility in biological materials across multiple disciplines. However, the impact of these techniques is highly dependent on the construction of appropriate comparative baselines (i.e., an isoscape). We present the results of a systematic survey of 87Sr/86Sr values from grasses in the North American Midcontinent with a particular emphasis on sedimentary systems. Although 87Sr/86Sr values are highly variable across the region, the Sr isoscape shows multi-scalar patterns that are dependent on local-to-regional trends in surficial geology. High values are found in bedrock-dominated areas such as the Black Hills (SD) and Ozark Uplift (MO), or formerly glaciated areas where surface deposits are dominated by ice-transported Precambrian clasts. The lowest values are found in river valleys that incorporate eroded Neogene sediments into terrace formation. Intermediate values are found in upland loess and alluvial deposits which blanket much of the study area. We demonstrate trends in large-scale variability of the Midcontinent’s 87Sr/86Sr isoscape and suggest that future refinement focus on sub-regional trends in Sr isotope variability. | en_US |
dc.publisher | Ubiquity Press | en_US |
dc.rights | © 2017 The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject | 87Sr/86Sr | en_US |
dc.subject | Isoscapes | en_US |
dc.subject | Isotopic tracers | en_US |
dc.subject | Midcontinent | en_US |
dc.title | Variability in Bioavailable 87Sr/86Sr in the North American Midcontinent | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Walker, J. Douglas | |
kusw.kudepartment | Geology | en_US |
dc.identifier.doi | 10.5334/oq.32 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |
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Except where otherwise noted, this item's license is described as: © 2017 The Author(s). This is an open-access article distributed under the terms of the Creative Commons
Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium,
provided the original author and source are credited