Geological Survey of Victoria – Recent Projects
|Gravity Survey begins in western Victoria|
The Geological Survey of Victoria is overseeing a low-impact gravity survey along selected public roads and tracks in western Victoria in December 2016.
A gravity survey is one of many low-impact geophysical techniques used by geologists to 'see' into the earth's surface. Western Victoria has been chosen to help answer specific questions about the distribution of different types of rocks in the area.
State and territory geological survey agencies regularly carry out geological and geophysical surveys.
The data gathered during the survey will be processed and then made publicly available through the Department of Economic Development, Jobs, Transport and Resources and Geoscience Australia websites. The data will be used to further increase the understanding of the region's geology.
|Read the fact sheet on the gravity survey|
|Water science studies - potential impacts of onshore gas development on Victoria's water resources.||The water science studies provide an initial screening analysis of a set of potential water - related issues and impacts that may arise as a consequence of the development of an onshore natural gas industry.|
The studies describe where natural gas might be, where water resources are, and assess what physical connections there may be between these gas and water resources. Where these resources are thought to be physically connected, the potential quantity and quality impacts on groundwater were investigated, and by inference the potential impacts on groundwater users, surface water users and ecosystems. The potential effectiveness of possible mitigation strategies have also been assessed.
Reports are available from onshoregas.vic.gov.au
L193 Southern Delamerian and L194 Ararat Seismic Survey
This project acquired deep seismic reflection data along three regional-scale transects that traversed nearly 300km of southwest Victoria, from near Ararat and Horsham, to near Glenthompson, west of Naracoorte in South Australia, and south of Apsley.
Project outcomes include the successful imaging of the Cambrian Stavely Arc buried beneath western Victoria, imaging of Cambrian and older structures developed within and beneath the Glenelg River Metamorphic Complex, and of structures controlling the development of the Moornambool Metamorphic Complex, host to the multi-million ounce Stawell Gold deposit.
Survey results led to the development of tectonic and geodynamic models of western Victoria that tie its Cambrian geology more closely to that seen in South Australia and western NSW, and in western Tasmania. The results spawned the Willaura Copper project, and the Stavely Arc project.
The surveys, conducted by ANSIR (National Research Facility for Earth Sounding), were primarily funded by AUSCOPE in association with Geoscience Australia and the Victorian and South Australia Departments of Primary Industries.
Information package L193 Southern Delamerian & L194 Ararat seismic survey data and interpretations
An investigation of mineral systems in western Victoria
The Dimboola Arc Domain has the potential to contain significant economic deposits of copper in large linear belts where calc-alkaline arc and mafic rocks occur in structurally favourable settings.
Structurally-bound volcanic belts have been identified to host copper and gold mineralisation. The geology and mineralisation is comparable to the economic deposits of copper and gold in the Mount Read Volcanics in western Tasmania.
There is significant potential for the discovery of Stawell-type gold deposits in the Moornambool Metamorphic Complex. There is also potential for nickel and copper mineralisation in the Glenelg Zone. These complexes are adjacent to the central Dimboola Arc Domain.
Seymon, A.R., Raetz., M.C. & Lynch, H.K., 2009, Copper, gold and nickel discovery opportunities in and around the Dimboola Arc Domain. GeoScience Victoria Technical Record 2009/1. GeoScience Victoria, Department of Primary Industries
Heavy Mineral Sands studies
Heavy Mineral Sands (HMS) were first reported in the Murray Basin of Victoria in 1967. After some sporadic exploration in the 1970s, a concerted and broad-ranging campaign by several companies during the 1980s and beyond has established Victoria as a significant HMS province.
Victoria's mineral sands deposits comprise:
Nickel Prospectivity in Victoria
This report summarises nickel mineralisation occurrences in Victoria. Nickel deposit styles and criteria reviewed and their relationships evaluated with respect to the regional geology and tectonic settings.
The report identifies prospective areas for nickel mineralisation.
Seymon, A.R., 2006. Nickel prospectivity in Victoria. Geological Survey of Victoria Technical Record 2006/3. Geological Survey of Victoria.
'Earth Echoes' documents a major project to acquire seismic data along a 400 km transect across central Victoria. The transect comprises four overlapping lines which span the width of the western Lachlan Orogen - a region already famous for its rich orogenic gold deposits.
The resultant geological models showcased Victoria's high prospectivity for future gold and base metal discoveries.
Geology of the Walhalla—Woods Point—Tallangallook project area
The Walhalla and Woods Point goldfields are two of the most significant in Victoria, having produced 110 tonnes of primary gold and more than 12 tonnes of alluvial gold.
The project area lies entirely in the eastern part of the Melbourne Zone, in the eastern highlands of Victoria about 200 km ENE of Melbourne.
The project area was a northwest trending belt about 30 to 50 km wide and 150 km long that encompasses many maps. It comprised most of Matlock (8122), half of Mansfield (8123) and smaller amounts of the Alexandra (8023), Euroa (8024), Maffra (8222) and Moe (8021) 1:100 000 map sheets.
The maps and report document the rock units, structure and gold mineralisation.