Eight-years of cave monitoring at Golgotha Cave, SW Australia: implications for speleothem paleoclimate records

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dc.contributor.authorTreble, PCen_AU
dc.contributor.authorFairchild, IJen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorBradley, Cen_AU
dc.contributor.authorWood, Aen_AU
dc.contributor.authorMcGuire, Een_AU
dc.date.accessioned2020-06-12T04:32:07Zen_AU
dc.date.available2020-06-12T04:32:07Zen_AU
dc.date.issued2014-06-29en_AU
dc.date.statistics2020-05-28en_AU
dc.description.abstractSpeleothems are an important archive of paleoenvironmental information but a thorough understanding of processes are necessary for their interpretation. In order to better understand speleothem records from the climatically-sensitive southwest region of WA, we have conducted a detailed eight-year monitoring study at Golgotha Cave, southwest WA. Oxygen isotopic data demonstrated that the majority of water moved through the porous Quaternary calcarenite as matrix-flow with an inferred transit time of <1 year. A zone of high-flow dripwater is fed by high-magnitude rainfall events (Treble et al., 2013). Prior calcite precipitation (PCP) signals of increased Mg/Ca and Sr/Ca in dripwater are attributed to stalactite deposition. This signal is enhanced at low-flow sites and minimised at the high-flow site as degassing and subsequent stalactite deposition are a function of drip interval. Long-term rising trends found in most solutes are attributed via a mass-balance approach to increasing forest bioproductivity, consistent with an increase in forest understorey following a low-intensity burn in 2006. A fundamental message from this study is that individual speleothem records from within Golgotha Cave will differ, e.g. speleothem δ18O at our high-flow site is biased to recording high-magnitude rainfall events, whilst PCP will be the main driver of speleothem Mg/Ca and Sr/Ca at low-flow sites. Forest biomass appears to be modulating transpiration-sensitive ions and these may serve as an indicator of fire history.en_AU
dc.identifier.citationTreble, P. C., Fairchild, I. J., Baker, A., Bradley, C., Wood, A., & McGuire, L. (2014). Eight-years of cave monitoring at Golgotha Cave, SW Australia: implications for speleothem paleoclimate records. Paper presented at the AQUA Biennial Meeting The Grand Hotel, Mildura, 29th June - 4th July, 2014.en_AU
dc.identifier.conferenceenddate4 July 2014en_AU
dc.identifier.conferencenameAQUA Biennial Meetingen_AU
dc.identifier.conferenceplaceMildura, Victoriaen_AU
dc.identifier.conferencestartdate29 June 2014en_AU
dc.identifier.govdoc9602en_AU
dc.identifier.urihttps://aqua.org.au/wp-content/uploads/2013/06/AQUA2014-program.pdfen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9618en_AU
dc.language.isoenen_AU
dc.publisherAustralasian Quaternary Association Incen_AU
dc.subjectWestern Australiaen_AU
dc.subjectCavesen_AU
dc.subjectForestsen_AU
dc.subjectOxygenen_AU
dc.subjectMonitoringen_AU
dc.subjectWateren_AU
dc.subjectQuaternary perioden_AU
dc.subjectRainen_AU
dc.titleEight-years of cave monitoring at Golgotha Cave, SW Australia: implications for speleothem paleoclimate recordsen_AU
dc.typeConference Abstracten_AU
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