ABSTRACT Included in Mineral Deposits at the Beginning of the 21st Century, Piestrzynski et al (e... more ABSTRACT Included in Mineral Deposits at the Beginning of the 21st Century, Piestrzynski et al (eds) 2001, Swets & Zeitlinger Publishers ISBN 9026518463 pp261-264
A group of structurally emplaced Cambrian metavolcanic inliers, informally known as the Barkly Ri... more A group of structurally emplaced Cambrian metavolcanic inliers, informally known as the Barkly River greenstones, in the Mt Useful Slate Belt, eastern Victoria, host several base-and precious-metal anomalies. To date, the most significant anomaly is the Hill 800 prospect, where disseminated and stockwork/stringer chalcopyrite + sphalerite + galena ± native Au mineralisation have been recognised. This ore assemblage is hosted by andesitic lavas and breccias and is syngenetic to pretectonic in origin. Deformation fabrics as well as unmineralised, low-temperature, quartz ± carbonate veins overprint the ore minerals. Spectacular gossan exposures and intense paragonite + chlorite + muscovite hydrothermal alteration zones are associated with the known extent of the mineralisation. Field relations, geochemical, petrographic, isotopic and fluid-inclusion studies indicate that ore genesis is closely related to a volcanic-hosted massive sulfide (VHMS) system, although certain characteristics resemble a porphyry-Cu style of mineralisation. Comparisons of these findings with other ore systems suggest that Hill 800 is a 'hybrid' system transitional between a VHMS and porphyry-Cu style of mineralisation. Moreover, the host rocks are analogous with the economically important Mt Read Volcanic Complex of western Tasmania. These findings emphasise that the Cambrian greenstones can potentially represent a new base-and precious-metal mineral province of Victoria.
Land Use Information is a key dataset required to enable an understanding of the changing nature ... more Land Use Information is a key dataset required to enable an understanding of the changing nature of our landscapes and the associated influences on natural resources and regional communities. The Victorian Land Use Information System (VLUIS) data product has been created within the State Government of Victoria to support land use assessments. The project began in 2007 using stakeholder engagement to establish product requirements such as format, classification, frequency and spatial resolution. Its genesis is significantly different to traditional methods, incorporating data from a range of jurisdictions to develop land use information designed for regular on-going creation and consistency. Covering the entire landmass of Victoria, the dataset separately describes land tenure, land use and land cover. These variables are co-registered to a common spatial base (cadastral parcels) across the state for the period 2006 to 2013; biennially for land tenure and land use, and annually for land cover. Data is produced as a spatial GIS feature class
Water shortage is common in much of Australia. With the vast majority of the continent classed as... more Water shortage is common in much of Australia. With the vast majority of the continent classed as semi arid (an overall average of 455mm rainfall per year) and the tropical north having monsoonal rains and long dry seasons, groundwater provides an essential buffer for many parts of the country. In recent years though, rainfall has been significantly below average, especially across the south east of the continent, which has affected vast areas of Australia’s most important agricultural production region. The Murray Darling Basin, (which occupies 1/7 of the continent) supported average annual consumptive water use of 11,000 GL (to 1997), but last year, had fallen to less than half. This year, heading in to spring, the 22,600 GL of upstream basin storage is sitting at only 23% of capacity.
Land Use Information is a key dataset required to enable an understanding of the changing nature ... more Land Use Information is a key dataset required to enable an understanding of the changing nature of our landscapes and the associated influences on natural resources and regional communities. The Victorian Land Use Information System (VLUIS) data product has been created within the State Government of Victoria to support land use assessments. The project began in 2007 using stakeholder engagement to establish product requirements such as format, classification, frequency and spatial resolution. Its genesis is significantly different to traditional methods, incorporating data from a range of jurisdictions to develop land use information designed for regular ongoing creation and consistency. Covering the entire landmass of Victoria, the dataset separately describes land tenure, land use and land cover. These variables are co-registered to a common spatial base (cadastral parcels) across the state for the period 2006 to 2013; biennially for land tenure and land use, and annually for land cover. Data is produced as a spatial GIS feature class. Design Type(s) observation design • time series design • data integration objective Measurement Type(s) land use • land tenure • land cover Technology Type(s) independent data collection method Factor Type(s) spatio-temporal resolution Sample Characteristic(s) State of Victoria • anthropogenic habitat
The use of models to infer or predict changes and impacts in natural resources and environmental ... more The use of models to infer or predict changes and impacts in natural resources and environmental systems is a fundamental research activity around the world. A recent audit of such modelling activities in eastern Australia uncovered a plethora of models in use and a number of instances where models were implemented across various groups and agencies. Often the active parties were unaware of each others research. The preparation of data and development of model parameters to support deployment of a model can take considerable effort and this can often be leveraged by subsequent research. Additionally, previous modelling when accessible may reduce expenses and inform by lessons of experience the selection of models and approaches to their future implementation. Addressing these research needs is the subject of this article. A prototype tool for storing and managing model metadata has been developed that extends the utility of the more traditional model register allowing storage of det...
The National Water Commission and Victorian Water Trust funded a research study by the Victorian ... more The National Water Commission and Victorian Water Trust funded a research study by the Victorian Department of Primary Industries to investigate the use of 3D geological mapping and visualisation methods for groundwater resource assessment and management purposes. Initially utilising approaches and computer technology developed largely by the oil industry, this study has explored how these tools can be applied to groundwater resource management needs by testing them in three Victorian case study areas.
Mapping of groundwater aquifers has historically followed the path of 2D geological maps and inte... more Mapping of groundwater aquifers has historically followed the path of 2D geological maps and interpreted cross sections derived from available geological borehole data. Isopachs or aquifer thicknesses are then derived from data layers. The addition of geophysical interpretation, through methods such as gravity and electro-magnetic surveys provide some confidence of continuity between boreholes. The advent of GIS and modern computer modelling has stretched the data further into the three dimensional digital world with the use of high-end numerical modelling and high-tech visualisation tools.
ABSTRACT Included in Mineral Deposits at the Beginning of the 21st Century, Piestrzynski et al (e... more ABSTRACT Included in Mineral Deposits at the Beginning of the 21st Century, Piestrzynski et al (eds) 2001, Swets & Zeitlinger Publishers ISBN 9026518463 pp261-264
A group of structurally emplaced Cambrian metavolcanic inliers, informally known as the Barkly Ri... more A group of structurally emplaced Cambrian metavolcanic inliers, informally known as the Barkly River greenstones, in the Mt Useful Slate Belt, eastern Victoria, host several base-and precious-metal anomalies. To date, the most significant anomaly is the Hill 800 prospect, where disseminated and stockwork/stringer chalcopyrite + sphalerite + galena ± native Au mineralisation have been recognised. This ore assemblage is hosted by andesitic lavas and breccias and is syngenetic to pretectonic in origin. Deformation fabrics as well as unmineralised, low-temperature, quartz ± carbonate veins overprint the ore minerals. Spectacular gossan exposures and intense paragonite + chlorite + muscovite hydrothermal alteration zones are associated with the known extent of the mineralisation. Field relations, geochemical, petrographic, isotopic and fluid-inclusion studies indicate that ore genesis is closely related to a volcanic-hosted massive sulfide (VHMS) system, although certain characteristics resemble a porphyry-Cu style of mineralisation. Comparisons of these findings with other ore systems suggest that Hill 800 is a 'hybrid' system transitional between a VHMS and porphyry-Cu style of mineralisation. Moreover, the host rocks are analogous with the economically important Mt Read Volcanic Complex of western Tasmania. These findings emphasise that the Cambrian greenstones can potentially represent a new base-and precious-metal mineral province of Victoria.
Land Use Information is a key dataset required to enable an understanding of the changing nature ... more Land Use Information is a key dataset required to enable an understanding of the changing nature of our landscapes and the associated influences on natural resources and regional communities. The Victorian Land Use Information System (VLUIS) data product has been created within the State Government of Victoria to support land use assessments. The project began in 2007 using stakeholder engagement to establish product requirements such as format, classification, frequency and spatial resolution. Its genesis is significantly different to traditional methods, incorporating data from a range of jurisdictions to develop land use information designed for regular on-going creation and consistency. Covering the entire landmass of Victoria, the dataset separately describes land tenure, land use and land cover. These variables are co-registered to a common spatial base (cadastral parcels) across the state for the period 2006 to 2013; biennially for land tenure and land use, and annually for land cover. Data is produced as a spatial GIS feature class
Water shortage is common in much of Australia. With the vast majority of the continent classed as... more Water shortage is common in much of Australia. With the vast majority of the continent classed as semi arid (an overall average of 455mm rainfall per year) and the tropical north having monsoonal rains and long dry seasons, groundwater provides an essential buffer for many parts of the country. In recent years though, rainfall has been significantly below average, especially across the south east of the continent, which has affected vast areas of Australia’s most important agricultural production region. The Murray Darling Basin, (which occupies 1/7 of the continent) supported average annual consumptive water use of 11,000 GL (to 1997), but last year, had fallen to less than half. This year, heading in to spring, the 22,600 GL of upstream basin storage is sitting at only 23% of capacity.
Land Use Information is a key dataset required to enable an understanding of the changing nature ... more Land Use Information is a key dataset required to enable an understanding of the changing nature of our landscapes and the associated influences on natural resources and regional communities. The Victorian Land Use Information System (VLUIS) data product has been created within the State Government of Victoria to support land use assessments. The project began in 2007 using stakeholder engagement to establish product requirements such as format, classification, frequency and spatial resolution. Its genesis is significantly different to traditional methods, incorporating data from a range of jurisdictions to develop land use information designed for regular ongoing creation and consistency. Covering the entire landmass of Victoria, the dataset separately describes land tenure, land use and land cover. These variables are co-registered to a common spatial base (cadastral parcels) across the state for the period 2006 to 2013; biennially for land tenure and land use, and annually for land cover. Data is produced as a spatial GIS feature class. Design Type(s) observation design • time series design • data integration objective Measurement Type(s) land use • land tenure • land cover Technology Type(s) independent data collection method Factor Type(s) spatio-temporal resolution Sample Characteristic(s) State of Victoria • anthropogenic habitat
The use of models to infer or predict changes and impacts in natural resources and environmental ... more The use of models to infer or predict changes and impacts in natural resources and environmental systems is a fundamental research activity around the world. A recent audit of such modelling activities in eastern Australia uncovered a plethora of models in use and a number of instances where models were implemented across various groups and agencies. Often the active parties were unaware of each others research. The preparation of data and development of model parameters to support deployment of a model can take considerable effort and this can often be leveraged by subsequent research. Additionally, previous modelling when accessible may reduce expenses and inform by lessons of experience the selection of models and approaches to their future implementation. Addressing these research needs is the subject of this article. A prototype tool for storing and managing model metadata has been developed that extends the utility of the more traditional model register allowing storage of det...
The National Water Commission and Victorian Water Trust funded a research study by the Victorian ... more The National Water Commission and Victorian Water Trust funded a research study by the Victorian Department of Primary Industries to investigate the use of 3D geological mapping and visualisation methods for groundwater resource assessment and management purposes. Initially utilising approaches and computer technology developed largely by the oil industry, this study has explored how these tools can be applied to groundwater resource management needs by testing them in three Victorian case study areas.
Mapping of groundwater aquifers has historically followed the path of 2D geological maps and inte... more Mapping of groundwater aquifers has historically followed the path of 2D geological maps and interpreted cross sections derived from available geological borehole data. Isopachs or aquifer thicknesses are then derived from data layers. The addition of geophysical interpretation, through methods such as gravity and electro-magnetic surveys provide some confidence of continuity between boreholes. The advent of GIS and modern computer modelling has stretched the data further into the three dimensional digital world with the use of high-end numerical modelling and high-tech visualisation tools.
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