Uranium series dating of Great Artesian Basin travertine deposits: implications for palaeohydrogeology and palaeoclimate

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dc.contributor.authorPriestley, SCen_AU
dc.contributor.authorKarlstrom, KEen_AU
dc.contributor.authorLove, AJen_AU
dc.contributor.authorCrossey, LJen_AU
dc.contributor.authorPolyak, VJen_AU
dc.contributor.authorAsmerom, Yen_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorCrow, Ren_AU
dc.contributor.authorKeppel, MNen_AU
dc.contributor.authorHabermehl, MAen_AU
dc.date.accessioned2022-06-02T23:03:33Zen_AU
dc.date.available2022-06-02T23:03:33Zen_AU
dc.date.issued2018-01-15en_AU
dc.date.statistics2022-06-02en_AU
dc.description.abstractTravertine deposits precipitated by groundwater discharging from the Great Artesian Basin (GAB) are widespread in central Australia and have the potential to provide a record of palaeohydrogeology and palaeoclimate. The GAB is one of the largest artesian basins in the world and a relationship between travertine deposits and recharge sites has potential importance regarding the time and position of past climate events, given that the travertines growth forms from precipitation discharge. We sampled numerous travertine sites in the southwest section of the GAB as a first approach to test this relationship. U-series dating of the travertine deposits reveal that spring discharge has likely been episodic for the last several hundred thousand years. Spring travertine deposition occurred episodically around 465 ± 50 ka, 370 ± 20 ka, 335 ± 15 ka, 285–240 ka, 185 ± 10 ka, 160–150 ka, 110–100 ka and during the past 30 ka. The periodicity of travertine ages observed with simultaneous deposition at multiple locations, argues for regional palaeohydrologic controls. Comparison of the travertine deposit ages with climate proxies in Australia shows that elevated travertine deposition rates are synchronous with wet periods in both central and southern Australia. Due to the large size of the GAB and that the recharge zones extend over multiple climatic regions of Australia, the times of travertine deposition are interpreted to represent times of high rainfall regionally. This study shows that the travertine deposits of central Australia provide a datable archive of past climate and hydrogeology of importance for understanding the groundwater evolution of the Great Artesian Basin, and that further more comprehensive studies are warranted. © 2018 Elsevier B.V.en_AU
dc.description.sponsorshipThis study and paper were funded by the National Water Commission, Australia under its Raising National Water Standards Program through the establishment of a research project entitled “Allocating water and maintaining springs in the Great Artesian Basin”. Participation from Laura Crossey and Karl Karlstrom was funded in part by the U.S. National Foundation grant EAR- 0838575.en_AU
dc.identifier.citationPriestley, S. C., Karlstrom, K. E., Love, A. J., Crossey, L. J., Polyak, V. J., Asmerom, Y., Meredith, K. T., Crow, R., Keppel, M. N., & Habermehl, M. A. (2018). Uranium series dating of Great Artesian Basin travertine deposits: implications for palaeohydrogeology and palaeoclimate. Palaeogeography, Palaeoclimatology, Palaeoecology, 490, 163-177. doi:10.1016/j.palaeo.2017.10.024en_AU
dc.identifier.issn0031-0182en_AU
dc.identifier.journaltitlePalaeogeographyen_AU
dc.identifier.pagination163-177en_AU
dc.identifier.urihttps://doi.org/10.1016/j.palaeo.2017.10.024en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13269en_AU
dc.identifier.volume490en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectUraniumen_AU
dc.subjectArtesian basinsen_AU
dc.subjectTravertineen_AU
dc.subjectHydrologyen_AU
dc.subjectPaleoclimatologyen_AU
dc.subjectWater springsen_AU
dc.subjectAustraliaen_AU
dc.titleUranium series dating of Great Artesian Basin travertine deposits: implications for palaeohydrogeology and palaeoclimateen_AU
dc.typeJournal Articleen_AU
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