A Strategic Integrated Digital Ground Model was created for Gold Coast Water including the collection of advanced Aquares geophysics. The model incorporated all available geophysics, geotechnical and environmental data, with the intention of becoming the primary decision and risk management tool across the Authority. This is a key part of an integrated approach to the […]
OEMG conducted an Aquares survey and prepared a ground model based on geophysics and targeted boreholes (early stage of the IDGM) for Mitsubishi-Talisman on the Daru Port expansion in Papua New Guinea. Previous studies had been conducted over 2 years at significant cost, with 77 vibracores and 116 boreholes and extensive analogue surveys undertaken. Key […]
OEMG’s IDGM was effectively integrated into the design process for the Port of Eden. The Aquares system discovered complex, vertical geological structures that other geophysical systems failed to visualise. After peer review, just 15 boreholes were required to validate the geophysical model. The IDGM created was then able to reduce estimated project piling costs by […]
An Aquares geophysical survey was undertaken for Great Lakes Council to assess the cause of a major road slip near Seal Rocks (Figure 1). The root cause of the slip was unknown and the nature of the terrain meant the repair would be costly so it was important to get it right. Figure 1: Aquares […]
A qualitative geophysical assessment was undertaken for Clarence Valley Council as part of the conception stage for an under bore in the Orara river. Due to steep terrain and pristine water conditions, no boreholes could be undertaken in the riverbed. Potential complex issues were identified by boreholes undertaken for the project on top of the […]
A qualitative geophysical assessment was undertaken for Clarence Valley Council as part of the conception stage of the Yamba ebb-tide release where NSW Public works is the project manager. Lessons learned from a similar project in Iluka were utilised to improve the methodology for the Yamba project. It should be noted that this project is […]
Proponents for a limestone quarry considering an expansion into a new lease elected to use Aquares resistivity soundings to explore the area, as a drilling campaign was considered too expensive. In addition, a classical resistivity survey failed to provide the required qualitative and quantitative geological information. Over 600 soundings were completed during the survey and a 3D model of the area was produced. From the results the compact limestone is clearly seen as a higher resistivity volume when compared to the more thinly bedded and shaly limestone. Based on the details seen within the Aquares resistivity results (overburden thickness, fault lines, rock qualities and thickness of weathered rock), a complete mine plan was developed and exploitation permits successfully applied for.
This project compared classical and Aquares resistivity acquired along the same line, as part of a ground-water assessment. It can be clearly seen from the Aquares results (below) that there are two distinct plumes, not a single plume seen from the classically acquired and processed results (above).
Aquares Land and Freshwater data sets may be merged for a seamless view of the sub-bottom. If sufficient soundings are collected, a 3-dimensional view of the sub-bottom may be constructed. A survey of a freshwater river system was undertaken as part of a study to quantify the gravel in a diamond bearing river. Here gravels (generally > 80 Ohm.m) are seen above the bedrock and clay stones. The accurate calculations of gravel volumes allowed the diamond reserves to be estimated.
An Aquares Resistivity survey was undertaken to assist with planning for a traffic tunnel passing underneath a major crossroad near Giessen, Netherlands. Previous boreholes described the presence of highly permeable sand formations in the nearby area at relevant depths. More detailed information was required to map these formations in order to provide options to overcome tunnel inundation risks. As part of the area was not accessible to heavy drilling equipment, the proponent elected to carry out a more flexible (and more economical) Aquares survey.