From 1 - 10 / 170
  • Terrex Seismic was contracted by ANSIR to conduct seismic recording operations for Ballarat Goldfields NL to acquire approximately ten (10) kilometers of high resolution 2D data within the Ballarat region of Victoria. Recording commenced on the 8th May 2006 and was completed 3 days later on the 11th May 2006. The acquisition area of the Ballarat High-Res 2D was situated approximately eight (8) kilometers south of the township of Ballarat. Raw data for this survey are available on request from clientservices@ga.gov.au

  • A ~400 km long deep crustal reflection seismic survey was acquired in central Victoria, Australia, in 2006. It has provided information on crustal architecture across the western Lachlan Orogen and has greatly added to the understanding of the tectonic evolution. The east-dipping Moyston Fault is confirmed as the suture between the Delamerian and western Lachlan Orogens, and is shown to extend down to the Moho. The Avoca Fault, the boundary between the Stawell and Bendigo Zones, is a west-dipping listric reverse fault that intersects the Moyston Fault at a depth of about 22 km, forming a V-shaped geometry. Both the Stawell and Bendigo Zones can be divided broadly into a lower crustal region of interlayered and imbricated metavolcanic and metasedimentary rocks and an upper crustal region of tightly folded metasedimentary rocks. The Stawell Zone was probably part of a Cambrian accretionary system along the eastern Gondwanaland margin, and mafic rocks may have been partly consumed by Cambrian subduction. Much of the Early Cambrian oceanic crust beneath the Bendigo Zone was not subducted, and is preserved as a crustal-scale imbricate thrust stack. The seismic data have shown that a thin-skinned structural model appears to be valid for much of the Melbourne Zone, whereas the Stawell and Bendigo Zones have a thick-skinned structural style. Internal faults in the Stawell and Bendigo Zones are mostly west-dipping listric faults, which extend from the surface to near the base of the crust. The Heathcote Fault Zone, the boundary between the Bendigo and Melbourne Zones, extends to at least 20 km, and possibly to the Moho. A striking feature in the seismic data is the markedly different seismic character of the mid to lower crust of the Melbourne Zone. The deep seismic reflection data for the Melbourne Zone have revealed a multilayered crustal structure that supports the Selwyn Block model. Raw data for this survey are available on request from clientservices@ga.gov.au

  • The Tanami region of the Northern Territory is a major Australian gold province and contains the world class Callie gold deposit. Shallow sediments largely obscure basement host rock, so the application of geophysical techniques has become an important mapping tool for the further exploration and development of the mine. Acquisition of seismic data along a single line across the deposit will test the understanding of key structures, some of which are related to mineralisation. By extending the line beyond the boundaries of the currently well understood mine area, we hope to illuminate continuations of stratigraphic and structural trends. These structures include: fault geometries, relationships of stratigraphic packages to controlling structures and stratigraphic thickness. The survey is designed to provide data to image to approximately 2km depth. Integration the data from this project with that of the Tanami Seismic Reflection Acquisition Project will provide a broader understanding of the structural and stratigraphic frame work of both the mine area and the Tanami region. Raw data for this survey are available on request from clientservices@ga.gov.au

  • The 2005 Broken Hill High Resolution 2D Seismic Survey, contracted to Terrex Seismic Pty Ltd for ANSIR (Australian National Seismic Imaging Resource) and New South Wales Department of Primary Industries - Mineral Resources. The survey operation was located approximately 6km north east of the town of Broken Hill in western New South Wales. The high resolution 120 fold seismic reflection survey was carried out in August 2005 along a 12 km portion of the seismic line 96AGS-BH1B in the Broken Hill region that was recorded by the Australian Geological Survey Organisation (AGSO) in 1996-97. The purpose of the new survey was to compare high resolution seismic data with low fold explosive seismic data along the same line and to image geological structures at shallow crustal levels. Two HEMI-60 Vibroseis trucks were used as sources. A total of 12.2 km of 120 fold seismic reflection data were acquired to 16 s TWT, except for the last 2 km of the profile where the fold was decreased to 60. Raw data for this survey are available on request from clientservices@ga.gov.au

  • A seismic survey using the Australian National Seismic Imaging Resource (ANSIR) Hemi 60 Vibroseis vehicles, ARAM24 acquisition equipment and Pelton controllers was carried out in the Curnamona Province of South Australia. A total of 197.6 km of 2-D seismic reflection data were collected to 18 seconds two way time over a single line at a nominal 60 fold CDP coverage. These data were acquired under contract by Trace Energy Services (2003) and by Terrex Seismic (2004). The survey commenced in August 2003 but was abandoned due to wet weather. Survey operations were recommenced and completed in July 2004. The project was undertaken to meet the objectives of ANSIR proposal 03-02R as lodged by researchers from PIRSA, Office of Minerals, Energy and Petroleum, SA. The principal scientific objective of this survey was to provide a regional crustal seismic image of the Curnamona Province. This dataset will assist in the understanding of the geological architecture and resource potential of the region particularly in areas under cover. This line links with a seismic transect in the Broken Hill Block undertaken by Australian Geological Survey Organisation (AGSO, now Geoscience Australia) in 1996 and provides a future opportunity for an eventual east-west continuation across the Adelaide Geosyncline and the Gawler Craton. The survey was funded by PIRSA, Office of Minerals, Energy and Petroleum, SA and the pmd*CRC with project supervision undertaken by ANSIR and in-kind support from Geoscience Australia (GA). Raw data for this survey are available on request from clientservices@ga.gov.au

  • Trace Energy Services was contracted by ANSIR to conduct the ANSTO 2002 Seismic Survey in New South Wales. Raw data for this survey are available on request from clientservices@ga.gov.au

  • A multicomponent seismic survey using an IVI MiniVib as a source was carried out to assist in mapping of fracture porosity in shear zones in areas of dryland salinity for the School of Biological, Earth and Environmental Sciences (UNSW). The survey obtained a set of three dimensional, three component data at two sites near Spicers Creek, some 45km east of Dubbo. The acquisition was undertaken by Australian National Seismic Imaging Resource (ANSIR) from the 5th to the 12th April 2003 with the assistance of staff from UNSW. The objectives of this seismic survey are: 1. Develop quantitative measure of azimuthal anisotropy of P- and S-waves using refracted head wave amplitudes. 2. Determine the relative effects of lithological fabric and fracture porosity on P- and S-wave anisotropy factors. 3. Determine quantitative relationships between azimuthal anisotropy and fracture porosity. 4. Measure the horizontal and vertical variability of the fracture porosity in the fracture zones which control the discharge of saline groundwater and the occurrence of dryland salinity at the three experimental sites in the Spicers Creek Catchment. 5. Develop cost-effect field techniques for 3D - 3C (three dimensional - three component) shallow seismic refraction surveys for geotechnical, environmental and groundwater applications. Raw data for this survey are available on request from clientservices@ga.gov.au

  • An experimental high-resolution seismic survey was undertaken in the Pilliga State Forest near Narrabri, NSW in April 2003. The Australian National Seismic Imaging Resource (ANSIR) carried out the field work on behalf of a Geoscience Australia research project. A NSW State Forests Special Purposes Permit was obtained for the survey. This survey was designed to collect a seismic dataset for shallow high-resolution seismic imaging in an area of known high data quality. Both P- and S-wave seismic sources were employed with data recorded using 14 Hz 3 component geophones. The objective of this project was to provide researchers with an over-sampled multi-component, multi-source shallow high-resolution seismic data set for the development of acquisition and processing methodologies. Raw data for this survey are available on request from clientservices@ga.gov.au

  • Processed seismic data (SEG-Y format) and TIFF images for the Curnamona line acquired as part of the 2008 Curnamona-Gawler-Arrowie Deep Crustal Seismic Survey (L189), acquired by Geoscience Australia (GA) under the Onshore Energy Security Program (OESP). Stack and migrated data for line 08GA-C1 as well as CDP coordinates and gravity data. The Curnamona line is 262km in length and runs north-south, east of Lake Frome in South Australia. Raw data for this survey are available on request from clientservices@ga.gov.au

  • Processed seismic data (SEG-Y format) and TIFF images for the Gawler line acquired as part of the 2008 Curnamona-Gawler-Arrowie Deep Crustal Seismic Survey (L189), acquired by Geoscience Australia (GA) under the Onshore Energy Security Program (OESP). Stack and migrated data for line 08GA-G1 as well as CDP coordinates and gravity data. The Gawler line aimed to investiage the southern Gawler Province. It crosses over the Eyre Peninsula in an east -west direction and is 253km long. Raw data for this survey are available on request from clientservices@ga.gov.au