Below we have explained the basic idea of exploration geophysics research, which will introduce you to the general use of geophysical measurement methods in exploration. If all this is very familiar to you, you can directly familiarize yourself with the key measurement methods we offer via the following links!Surface GeophysicsBorehole Geophysics
Exploration geophysics is based on the use of geophysical research methods in locating ore reserves and assessing their properties. Geophysical research methods have developed to serve modern, efficient and responsible exploration.
Ore and the geological structures containing ore almost invariably differ from the surrounding geology in one or more physical parameters. First, we must identify what, what kind and on what scale this difference is or can be - we are identifying an anomaly, a geological structure that deviates from the environment. The deviation can be in density, seismic velocity, electrical conductivity, magnetism or even electrical polarizability. Petrophysics, the science of the physical and chemical properties of rocks, comes into play.
So, a research method is chosen from geophysics that is assumed to react to the abnormal petrological property of the ore-bearing geological structure. For massive ores, it could be gravimetry, or gravity measurement, the most important thing here is that the ore rock is denser than the host rock and the difference can be measured. For electrically conductive ores, the method chosen is often electromagnetic measurements, such as ground EM or borehole EM, or BHEM. It is often sensible to utilize several geophysical research methods, because the ore can be, for example, both magnetically and electrically anomalous. If a mistake is made in the choice of method, the ore may not be found at all. This requires cooperation between a geologist, a geophysicist, and a petrophysicist.
The choice of exploration method is also influenced by the stage of exploration, the extent of the area being explored, the terms of the exploration permit and the available resources. Exploration in a new area is usually started with methods that are reasonable in cost per square kilometre and that are efficient in conducting the exploration. The initial exploration methods include magnetic, gravimetric and certain electromagnetic methods. This provides an overview of the desired physical properties of the area. After the first stage, an object of interest is often found in the area being explored, which allows the already measured lines of exploration to be condensed using old methods or new methods to be introduced. The goal is that the information becomes increasingly detailed and future decision-making becomes easier. At some point, drilling machines will also arrive in the exploration area. Drill holes offer a good opportunity to approach the presumed ore and obtain increasingly accurate and detailed information about the object of interest. Of course, the available financial resources set limits to all of this - some of the measurements are slower to complete and then the unit costs naturally increase. Of course, it should be noted that geophysics is a very cost-effective way to guide, for example, valuable drilling operations. Compliance with permit conditions is extremely important, and for example, mechanical movement in the terrain may be limited to winter. Some methods must be performed in the summer and some on foot. These also have their own impact on the chosen geophysical research method and the implementation of measurements in the terrain.
As experts in geophysical exploration methods, we have a duty to help our customers choose the right method and the right measurement configuration for each target and situation. It is important that you contact our experts at an early stage, so that there is no rush with the planning - in this case too, well-planned work guarantees success, financial success and responsible operations.
Contact us - we want to help you and your project move forward towards more responsible operations. More detailed information about the geophysical exploration methods we offer can be found in the following sections of our website.
Surface GeophysicsBorehole Geophysics
