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Full-Text Articles in Physical Sciences and Mathematics
Tectonic Implications Of Early Paleozoic Metamorphism In The Anakie Inlier, Central Queensland, Australia, R Offler, G Phillips, C L. Fergusson, T J. Green
Tectonic Implications Of Early Paleozoic Metamorphism In The Anakie Inlier, Central Queensland, Australia, R Offler, G Phillips, C L. Fergusson, T J. Green
Faculty of Science - Papers (Archive)
Well-defined metamorphic zones are developed in pelitic and psammitic rocks of the Late Neoproterozoic to Cambrian Anakie Metamorphic Group of the Anakie Inlier, central Queensland. They are defined by the incoming of biotite, garnet, and andalusite, with or without staurolite. Mineral assemblages indicate that low pressure-high temperature metamorphism is associated with D1, medium pressure-high temperature metamorphism with D2, and retrograde, low pressure-low temperature metamorphism with D3. A mean b cell parameter of 9.035 obtained from K-white micas in the lowest-grade rocks suggests upper intermediate pressure conditions during D2. The timing of the growth of the index minerals indicates that isotherms …
'The Falling Sky': Symbolic And Cosmological Associations Of The Mt William Greenstone Axe Quarry, Central Victoria, Australia, Adam R. Brumm
'The Falling Sky': Symbolic And Cosmological Associations Of The Mt William Greenstone Axe Quarry, Central Victoria, Australia, Adam R. Brumm
Faculty of Science - Papers (Archive)
This article examines the roles of socio-symbolic practices and cosmological beliefs in the production and exchange of stone artefacts in an ethnohistorically documented context in Australia. Isabel McBryde's petrological and ethnohistorical analysis of greenstone axe distribution patterns in central Victoria provides a key example of social factors overriding technological concerns in the production and exchange of lithic artefacts. Her research shows that greenstone axes from Mt William quarry were distributed further than axes from equivalent sources. This suggests that Mt William stone axes had symbolic values that cannot be appreciated from straightforward economic perspectives - the aim of this article …
The Soils Of Kiritimati (Christmas) Island, Kiribati, Central Pacific: New Information And Comparison With Previous Studies, Colin D. Woodroffe, Robert John Morrison
The Soils Of Kiritimati (Christmas) Island, Kiribati, Central Pacific: New Information And Comparison With Previous Studies, Colin D. Woodroffe, Robert John Morrison
Faculty of Science - Papers (Archive)
No abstract provided.
Late Neoproterozoic Passive Margin Of East Gondwana: Geochemical Constraints From The Anakie Inlier, Central Queensland, Australia, Christopher L. Fergusson, R Offler, T Green
Late Neoproterozoic Passive Margin Of East Gondwana: Geochemical Constraints From The Anakie Inlier, Central Queensland, Australia, Christopher L. Fergusson, R Offler, T Green
Faculty of Science - Papers (Archive)
Development of the East Gondwana passive margin and when it occurred are constrained by the composition of low grade mafic schists and U-Pb ages of detrital zircons in psammitic schists from the Bathampton Metamorphics in the Anakie Inlier of central Queensland. These rocks show considerable variation in light lithophile elements due to post-magmatic processes. They have flat heavy rare earth element patterns, low-TiO2 (<2 wt%) contents and their immobile element Ti, V, Y, La, Nb, Th and Zr values, indicate that they have an NMORB- like magmatic affinity. However, they differ from N-MORB in that they show light rare earth depleted patterns and lower incompatible trace element contents. Their relative low abundance and association with metasediments suggest they formed in a magma-poor rifted margin setting. They are associated with psammitic rocks with detrital zircon ages indicating probable deposition in the late Neoproterozoic at ca 600 Ma. A magma-poor rifted margin in northeastern Australia differs from the volcanic passive setting that occurred in southeastern Australia at this time. These findings support development of the East Gondwana margin at 600 Ma that may have been related to rifting of a microcontinent off East Gondwana well after the breakup of Rodinia at ca 750 Ma.
Pre-Mining Pattern Of Soils On Nauru, Central Pacific, Robert John Morrison, Harley I. Manner
Pre-Mining Pattern Of Soils On Nauru, Central Pacific, Robert John Morrison, Harley I. Manner
Faculty of Science - Papers (Archive)
The environment of Nauru, a raised atoll located in the central Pacific Ocean (0° 32′ S, 166° 56′ W), was devastated by mining of phosphate “rock” during the twentieth century. Some 100 million tonnes of phosphate material has been removed, leaving more than 80% of the island as a dolomite pinnacle–dominated karrenfeld. Based on fieldwork examining sites unmined at that time, laboratory studies on undisturbed profiles, aerial photographs, and old mining maps, a picture of what the soil pattern on Nauru was before mining has been developed. Four major soil associations were identified: the coastal fringe carbonate dominated soils set …
Structure, Detrital Zircon U-Pb Ages And 40ar/39ar Geochronology Of The Early Palaeozoic Girilambone Group, Central New South Wales: Subduction, Contraction And Extension Associated With The Benambran Orogeny, Christopher L. Fergusson, C M Fanning, D. Phillips, Benjamin Ackerman
Structure, Detrital Zircon U-Pb Ages And 40ar/39ar Geochronology Of The Early Palaeozoic Girilambone Group, Central New South Wales: Subduction, Contraction And Extension Associated With The Benambran Orogeny, Christopher L. Fergusson, C M Fanning, D. Phillips, Benjamin Ackerman
Faculty of Science - Papers (Archive)
The Early Palaeozoic Cape River Metamorphics consist mainly of psammitic gneiss and schist and occur as an extensive linear belt at the western margin of the Charters Towers Province 200 km southwest of Townsville in the northern Tasmanides. A prominent foliation (S2) is the main structure in the belt and is associated with tight to isoclinal folds, subparallel mineral and intersection lineations, and boudinaged pods of vein quartz and pegmatite. In the southwest, the main foliation is a crenulation cleavage (S2) related to D2 deformation. It overprints steeply dipping foliation (S1) formed in …
Environmental (Re)Education And Local Environmental Knowledge: Statutory Ground-Based Monitoring And Pastoral Culture In Central Australia, Nicholas J. Gill
Environmental (Re)Education And Local Environmental Knowledge: Statutory Ground-Based Monitoring And Pastoral Culture In Central Australia, Nicholas J. Gill
Faculty of Science - Papers (Archive)
Ground-based monitoring of rangeland condition is common in Australian pastoral administration systems. In the Northern Territory, such monitoring is officially seen as a key plank of sustainable pastoral land use. In the NT and elsewhere, these monitoring schemes have sought to increase participation by pastoralists. Involvement of pastoralists in monitoring is theoretically an educative process that will cause pastoralists to more critically examine their management practices. Critical perspectives on the relationship between rangelands science/extension and pastoralist knowledge systems and concerns, however, suggest that pastoralists’ reception of such monitoring schemes will be influenced by a range of social contexts, including the …