Dating Pliocene lacustrine sediments in the central Jordan Valley, Israel - Implications for cosmogenic burial dating

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dc.contributor.authorDavis, Men_AU
dc.contributor.authorMatmon, Aen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorRon, Hen_AU
dc.contributor.authorNiedermann, Sen_AU
dc.date.accessioned2011-10-11T23:39:49Zen_AU
dc.date.available2011-10-11T23:39:49Zen_AU
dc.date.issued2011-05-15en_AU
dc.date.statistics2011-10-11en_AU
dc.description.abstractCosmogenic burial dating of sediments is usually used at sites with relatively simple or known exposure-burial histories, such as in caves. In an attempt to extend the applicability of the method to other common geological settings (i.e. the dating of late Neogene sedimentary formations), where much less is known about the exposure-burial history, we apply the cosmogenic burial method on Pliocene-early Pleistocene (1.5-4.5 Ma) lacustrine sediments in the central Jordan Valley, Israel. (26)Al, (10)Be, and (21)Ne concentrations in quartz were obtained from a 170 m tectonically-tilted section. Assuming fast burial and no post-burial production we obtained burial ages which range between 3.5 and 5.3 Ma. Integrating simple geological reasoning and the cosmogenic nuclide data, post burial production is found to be insignificant. We also found that the samples contain two distinct populations of grains (chert and quartz) from two different sources which experienced different pre-burial exposure histories. The cosmogenic nuclide concentrations in the samples are in accordance with those expected for the mixing of two sources, and the burial ages computed for both end members agree. Theoretical calculations of two-source mixing show that initial (26)Al/(10)Be ratios are depressed relative to the expected surface ratios and may result in burial ages overestimated by as much as 500 ka. Using ages derived from cosmogenic nuclides, independent age constraints, and magnetostratigraphy we correlate the bottom of the section to the Cochiti Normal magnetic subchron (4.19-4.30 Ma) within the Reverse Gilbert chron, and the top of the section to the Reverse subchron at the top of the Gilbert chron (3.60-4.19 Ma). (C) 2011 Elsevier B.V.en_AU
dc.identifier.citationDavis, M., Matmon, A., Fink, D., Ron, H., Niederniann, S. (2011). Dating Pliocene lacustrine sediments in the central Jordan Valley, Israel - Implications for cosmogenic burial dating. Earth and Planetary Science Letters, 305(3-4), 317-327. doi:10.1016/j.epsl.2011.03.003en_AU
dc.identifier.govdoc3503en_AU
dc.identifier.issn0012-821Xen_AU
dc.identifier.issue3-4en_AU
dc.identifier.journaltitleEarth and Planetary Science Lettersen_AU
dc.identifier.pagination317-327en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.epsl.2011.03.003en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3817en_AU
dc.identifier.volume305en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAge estimationen_AU
dc.subjectSedimentsen_AU
dc.subjectIsraelen_AU
dc.subjectIsotopesen_AU
dc.subjectPleistocene epochen_AU
dc.subjectSeedsen_AU
dc.titleDating Pliocene lacustrine sediments in the central Jordan Valley, Israel - Implications for cosmogenic burial datingen_AU
dc.typeJournal Articleen_AU
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