https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:14156 14C response, presumed to be related to site characteristics such as vegetation, temperature, rainfall, depth below the surface, and water pathway through the aquifer. Peak ¹⁴C activity for WM4 is 134.1 pMC, the highest cited thus far in the literature and suggestive of a lower inertia at this site. Dead carbon fractions for each stalagmite were calculated and found to be relatively similar for the 3 speleothems and lower than those derived from Northern Hemisphere speleothems. An inverse modeling technique based on the work of Genty and Massault (1999) was used to estimate soil carbon residence times. For each speleothem, mean soil 14C reservoir ages differed greatly between the 3 sites, ranging from 2–6.5 to 32–46 yr.]]> Wed 11 Apr 2018 16:39:29 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:2461 Wed 11 Apr 2018 16:34:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31155 Wed 11 Apr 2018 11:49:04 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11218 Wed 11 Apr 2018 10:32:36 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6878 Sat 24 Mar 2018 10:24:42 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8976 Sat 24 Mar 2018 08:42:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1234 Sat 24 Mar 2018 08:28:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1222 Sat 24 Mar 2018 08:28:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11782 Sat 24 Mar 2018 08:07:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30183 2 contribution to the total dissolved inorganic carbon (DIC). Pronounced millennial-scale shifts in DCP and relatively small coeval but antipathetic changes in δ¹³C are modulated by the effects of hydrological variability on open and closed-system dissolution, SAD and prior calcite precipitation. Hence, the DCP in Corchia Cave speleothems represents an additional proxy for rainfall amount.]]> Sat 24 Mar 2018 07:41:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26051 230Th relative even to the very low levels of detrital ²³⁰Th present. Here, we present an alternative method for reliable dating of these young speleothems using radiocarbon. Approximately 100 carbonate samples from SC4 and WM7 were analysed for ¹⁴C by accelerator mass spectrometry (AMS). The AMS results indicate that bomb ¹⁴C was evident in the youngest parts of both stalagmites. Two different approaches were used to estimate dead carbon fraction (DCF) values for these stalagmites for the pre-bomb period. For SC4, the DCF values were estimated based on the timing of ¹⁴C dates for that period determined by high-resolution δ¹⁸O recorded in the speleothem, and the timing of the onset of bomb ¹⁴C. For WM7, a “maximum” range of pre-bomb DCF was determined. Chronologies of these speleothems were built based on a dense sequence of DCF-corrected ages using three different age-depth models: Clam (Classical method), and Bacon and OxCal (Bayesian statistical approach). Good agreement between these age-depth models were observed indicating that the top 170 mm of SC4 and the top 50 mm of WM7 grew during the past 550–750 years and 1360–1740 years, respectively.]]> Sat 24 Mar 2018 07:31:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3322 5 m thick flowstones whose top-beds have an age exceeding the limits of U/Th alpha spectrometric dating (>350 ka). Cave morphology and chronological constraints obtained from speleothems suggest that an important uplift event occurred during the Middle Pleistocene following a period of tectonic standstill of probable latest Early Pleistocene age. Active spring caves close to present-day valley floors contain speleothems whose ages exceed 100 ka, implying that no significant downcutting of the seaward valleys, and consequently no tectonic uplift, has occurred during Late Pleistocene.]]> Sat 24 Mar 2018 07:23:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3318 Sat 24 Mar 2018 07:23:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3182 Sat 24 Mar 2018 07:18:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25047 Sat 24 Mar 2018 07:10:46 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35499 Mon 13 Mar 2023 15:06:27 AEDT ]]>