https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Geomorphological evolution and sediment stratigraphy of numerically simulated alluvial fans https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39999 Wed 22 Mar 2023 10:03:45 AEDT ]]> Natural carbonation of ultramafic rocks in the Great Serpentinite Belt, New South Wales, Australia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13592 Wed 11 Apr 2018 12:52:13 AEST ]]> The mARM spatially distributed soil evolution model: a computationally efficient modeling framework and analysis of hillslope soil surface organization https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:7281 Wed 11 Apr 2018 10:18:13 AEST ]]> Predicting gully erosion using landform evolution models: Insights from mining landforms https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43980 Wed 07 Feb 2024 16:38:20 AEDT ]]> The role of moisture cycling in the weathering of a quartz chlorite schist in a tropical environment: findings of a laboratory simulation https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:603 Thu 25 Jul 2013 09:10:24 AEST ]]> Fingerprinting Plastic-Associated Inorganic and Organic Matter on Plastic Aged in the Marine Environment for a Decade https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39702 Thu 22 Feb 2024 11:29:44 AEDT ]]> The 'humped' soil production function: eroding Arnhem Land, Australia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8163 Sat 24 Mar 2018 08:36:06 AEDT ]]> Spatial organization of soil depths using a landform evolution model https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:867 Sat 24 Mar 2018 08:31:31 AEDT ]]> The role of moisture cycling in the weathering of a quartz chlorite schist in a tropical environment: findings of a laboratory simulation https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:864 Sat 24 Mar 2018 08:31:31 AEDT ]]> The development of a residual soil profile from a mudstone in a temperate climate https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:830 Sat 24 Mar 2018 08:31:27 AEDT ]]> Formation of weathering-derived magnesite deposits in the New England Orogen, New South Wales, Australia: implications from mineralogy, geochemistry and genesis of the Attunga magnesite deposit https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20095 Sat 24 Mar 2018 08:00:09 AEDT ]]> Weathering rates of sandstone in a semi-arid environment (Hunter Valley, Australia) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5472 Sat 24 Mar 2018 07:47:05 AEDT ]]> Soil armouring and weathering: toward catchment-scale computational modelling https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6082 Sat 24 Mar 2018 07:44:45 AEDT ]]> Sequestration of atmospheric CO₂ in chrysotile mine tailings of the Woodsreef Asbestos Mine, Australia: quantitative mineralogy, isotopic fingerprinting and carbonation rates https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28586 18O, δ¹³C and F¹⁴C signatures, respectively. Low and variable concentrations of magnesite, dolomite and calcite represent bedrock carbonate, which has formed during alteration of the serpentinite bedrock before mining and is characterised by moderately high δ¹⁸O, low δ¹³C and F¹⁴C, a signature typical for ‘weathering-derived’ magnesite deposits in the GSB. The carbonate fraction of deep cement samples, collected from 70 to 120 cm below the surface, representing the bulk tailings material at depth, predominantly consists of pyroaurite (Mg₆Fe₂(CO₃)(OH)₁₆·4H₂O) and, despite stable isotope signatures similar to bedrock, contains significant radiocarbon. This indicates that pyroaurite, forming under different conditions as hydromagnesite, may represent an additional trap for atmospheric CO₂ in the Woodsreef mine tailings. The distribution of carbonates and quartz, together with the absence of isotopic mixing trends between bedrock carbonate and atmospheric-derived carbonate, strongly indicates that dissolution and re-precipitation of bedrock carbonate is not a dominant process in the Woodsreef tailings. The cations for carbonate formation are instead derived from the dissolution of serpentine minerals (lizardite and chrysotile) and brucite. The internal standard method and the reference intensity method have been used with X-ray diffraction data to estimate the abundance of the two major carbonate minerals hydromagnesite and pyroaurite, respectively. Considering the formation of hydromagnesite on the outer surface of the tailings pile alone or together with formation of pyroaurite within the tailings pile we conclude that, between 1400 and 70,000 t of atmospheric CO₂ have been sequestered in the mine tailings since closure of the mine 29 a ago. Carbonation rates of 27 g C m⁻² y⁻¹ and 1330 g C m⁻² y⁻¹ are significantly higher than background rates of CO₂ uptake by chemical weathering and demonstrate the potential of passive carbonation of mine tailings as a cost and energy effective alternative for storage of CO₂ in carbonate minerals.]]> Sat 24 Mar 2018 07:37:25 AEDT ]]> Weathering rates of sandstone in a semi-arid environment (Hunter Valley, Australia) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3314 Sat 24 Mar 2018 07:23:21 AEDT ]]> Assessing the effects of rock mass gradual deterioration on the long-term stability of abandoned mine workings and the mechanisms of post-mining subsidence - a case study of Castle Fields mine https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48276 Mon 13 Mar 2023 19:12:57 AEDT ]]> Landslides in tertiary basalts at Murrurundi, Australia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26503 Mon 06 Mar 2017 12:45:51 AEDT ]]>