The Contribution of High Resolution Aeromagnetics to Archean Gold Exploration in the Kalgoorlie Region, Western Australia

1989 ◽  
pp. 389-397 ◽  
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Gold Exploration

scholarly journals High Resolution Seismic Reflection and Radar for Hydrogeology: The Gnangara Mound, Perth Basin, Western Australia

2007 ◽  
Vol 2007 (1) ◽  
pp. 1-1
Author(s):  
Brett Harris ◽  
Milovan Urosevic ◽  
Anton Kepic ◽  
Michael Sykes ◽  
Michael Martin ◽  
...  
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Seismic Reflection

scholarly journals Sensitivity of point scale surface runoff predictions to rainfall resolution

2007 ◽  
Vol 11 (2) ◽  
pp. 965-982 ◽  
Author(s):  
A. J. Hearman ◽  
C. Hinz
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Surface Runoff ◽  
Rainfall Data ◽  
Soil Water Storage ◽  
Point Scale ◽  
Deep Drainage ◽  
Model Predictions ◽  
Infiltration Excess ◽  
Saturation Excess

Abstract. This paper investigates the effects of using non-linear, high resolution rainfall, compared to time averaged rainfall on the triggering of hydrologic thresholds and therefore model predictions of infiltration excess and saturation excess runoff at the point scale. The bounded random cascade model, parameterized to three locations in Western Australia, was used to scale rainfall intensities at various time resolutions ranging from 1.875 min to 2 h. A one dimensional, conceptual rainfall partitioning model was used that instantaneously partitioned water into infiltration excess, infiltration, storage, deep drainage, saturation excess and surface runoff, where the fluxes into and out of the soil store were controlled by thresholds. The results of the numerical modelling were scaled by relating soil infiltration properties to soil draining properties, and in turn, relating these to average storm intensities. For all soil types, we related maximum infiltration capacities to average storm intensities (k*) and were able to show where model predictions of infiltration excess were most sensitive to rainfall resolution (ln k*=0.4) and where using time averaged rainfall data can lead to an under prediction of infiltration excess and an over prediction of the amount of water entering the soil (ln k*>2) for all three rainfall locations tested. For soils susceptible to both infiltration excess and saturation excess, total runoff sensitivity was scaled by relating drainage coefficients to average storm intensities (g*) and parameter ranges where predicted runoff was dominated by infiltration excess or saturation excess depending on the resolution of rainfall data were determined (ln g*<2). Infiltration excess predicted from high resolution rainfall was short and intense, whereas saturation excess produced from low resolution rainfall was more constant and less intense. This has important implications for the accuracy of current hydrological models that use time averaged rainfall under these soil and rainfall conditions and predictions of larger scale phenomena such as hillslope runoff and runon. It offers insight into how rainfall resolution can affect predicted amounts of water entering the soil and thus soil water storage and drainage, possibly changing our understanding of the ecological functioning of the system or predictions of agri-chemical leaching. The application of this sensitivity analysis to different rainfall regions in Western Australia showed that locations in the tropics with higher intensity rainfalls are more likely to have differences in infiltration excess predictions with different rainfall resolutions and that a general understanding of the prevailing rainfall conditions and the soil's infiltration capacity can help in deciding whether high rainfall resolutions (below 1 h) are required for accurate surface runoff predictions.

scholarly journals Multidecadal Evaluation of WRF Downscaling Capabilities over Western Australia in Simulating Rainfall and Temperature Extremes

2015 ◽  
Vol 54 (2) ◽  
pp. 370-394 ◽  
Author(s):  
Julia Andrys ◽  
Thomas J. Lyons ◽  
Jatin Kala
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
General Circulation ◽  
Regional Climate ◽  
Wrf Model ◽  
Climate Extremes ◽  
Convective Precipitation ◽  
Climate Simulation ◽  
Climate Indices ◽  
Climate Simulations

AbstractThe authors evaluate a 30-yr (1981–2010) Weather Research and Forecast (WRF) Model regional climate simulation over the southwest of Western Australia (SWWA), a region with a Mediterranean climate, using ERA-Interim boundary conditions. The analysis assesses the spatial and temporal characteristics of climate extremes, using a selection of climate indices, with an emphasis on metrics that are relevant for forestry and agricultural applications. Two nested domains at 10- and 5-km resolution are examined, with the higher-resolution simulation resolving convection explicitly. Simulation results are compared with a high-resolution, gridded observational dataset that provides daily rainfall, minimum temperatures, and maximum temperatures. Results show that, at both resolutions, the model is able to simulate the daily, seasonal, and annual variation of temperature and precipitation well, including extreme events. The higher-resolution domain displayed significant performance gains in simulating dry-season convective precipitation, rainfall around complex terrain, and the spatial distribution of frost conditions. The high-resolution domain was, however, influenced by grid-edge effects in the southwestern margin, which reduced the ability of the domain to represent frontal rainfall along the coastal region. On the basis of these results, the authors feel confident in using the WRF Model for regional climate simulations for the SWWA, including studies that focus on the spatial and temporal representation of climate extremes. This study provides a baseline climatological description at a high resolution that can be used for impact studies and will also provide a benchmark for climate simulations driven by general circulation models.

Use of immobile trace elements in gold exploration in the Neoarchean Sandstone Greenstone Belt, Yilgarn Block, Western Australia

2019 ◽  
Vol 55 (2) ◽  
pp. 241-256 ◽  
Author(s):  
Changshun Jia ◽  
David I. Groves ◽  
Michael S. Kammermann ◽  
Dermot M. Ryan ◽  
Rhys S. Davies
Keyword(s):  
Trace Elements ◽  
Western Australia ◽  
Greenstone Belt ◽  
Gold Exploration ◽  
Sandstone Greenstone Belt

3D geological model for King Sound, Canning Basin, Western Australia using FALCON® high resolution airborne gravity gradiometry data

2013 ◽  
Vol 2013 (1) ◽  
pp. 1-4
Author(s):  
Dr P. Kovac ◽  
Mrs S. J. Lowe ◽  
Mr T. Rudge ◽  
Dr C. Cevallos ◽  
Dr J. Feijth ◽  
...  
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Airborne Gravity ◽  
Geological Model ◽  
Gravity Gradiometry ◽  
Canning Basin ◽  
3D Geological Model ◽  
Airborne Gravity Gradiometry

STRUCTURAL EVOLUTION OF THE CARNARVON TERRACE, WESTERN AUSTRALIA

1995 ◽  
Vol 35 (1) ◽  
pp. 321 ◽  
Author(s):  
P.W. Baillie ◽  
E. Jacobson
Keyword(s):  
High Resolution ◽  
Western Australia ◽  
Long Island ◽  
Structural Evolution ◽  
Early Jurassic ◽  
Seismic Survey ◽  
Fault System ◽  
Late Triassic ◽  
Structural Configuration ◽  
Break Up

The under-explored Carnarvon Terrace is situated offshore of the Cape Range area in the Carnarvon Basin near the boundary of the Gascoyne and Exmouth Sub-basins. The stratigraphy of the area is controlled by only two wells (Pendock-1, Yardie East-1), but several onshore wells aid interpretation of seismic data.Understanding of the structural evolution of the region is facilitated by interpretation of a high-resolution non-exclusive seismic survey acquired by Geco-Prakla in 1993 (GPCTR-93 Survey).Three major tectonic stages are responsible for the structural configuration of the region:Late Palaeozoic extension in the Gascoyne Sub-basin;continental break-up between Australia and Greater India which took place along a major fracture marked by the Flinders-Long Island-Learmonth fault system active in Late Triassic and Early Jurassic times; andthe collision between Australia and Asia that commenced in Miocene times and is continuing to the present day. This event, marked by wrench and compressional structures, and often reactivation of older structures, is one of the most economically important in Australian geological history.From a regional prospectivity viewpoint at least three plays are worthy of further investigation.

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