Matrix GeoTechnologies LTD

By: Matrix Geotechnologies  09-12-2011
Keywords: Surveys, interpretation, Geophysics

Potential Field surveys involve the measurement of variations in the earth’s natural fields. Generally, two methods are classified as Potential fields: magnetic and gravity surveys; both attempt to measure small differences in a force which is relatively huge and local variations in density or magnetic susceptibility of the rocks cause minute changes in the main field. It is important to emphasize that contrary to common thinking in mineral exploration, the potential fields data cannot ordinarily be used for targeting purposes other than in combination with other geophysical and\or geoscientific data.

has the capability to collect magnetic and gravity data; however, we use these data in conjunction with QUANTITATIVE SECTION™ METHODOLOGY, in order to refine the interpreted conceptual model and better select the drill targets (e.g. differentiate iron formation from sulphides). Furthermore, we are developing the new routine that will enable the including of potential field data directly in 2D conceptual models.

Although QUANTITATIVE SECTION™ METHODOLOGY is our main product, we nevertheless undertake conventional geoelectric surveys such as Gradient, Pole-Dipole or Dipole-Dipole and other symmetric or asymmetric configurations.

Integration and visualization of various geophysical data are essential to better understand the geology of the area and direct future exploration program. However, data integration and visualization are challenging because the differences of the nature geophysical techniques used. We were able to surpass this problem integrating several geophysical techniques in one interpretive 3D conceptual model that can be used to better direct the DH programs. In addition, we are working to extend the number of data set that can be integrated in our 3D model in order to further refine the interpreted conceptual model.

The integration and visualization of geoscientific information has had significant impact in all aspects of mineral exploration. Based on this perspective, MATRIX GEOTECHNOLOGIES LTD developed the 2D and 3D visualization of IP\Resistivity data; expanding and developing in collaboration with GEOMAT new routines that enable other geoscientific data to be incorporated in our conceptual 2D\3D models.

MATRIX GEOTECHNOLOGIES LTD

has unique approaches regarding the data interpretation. Our interpretations provide better understanding of geology and mineral distribution at depth, nature of mineralization’ faulting system, and DH targeting at depth of investigation (examples of interpretation plan maps).

AIRBORNE DATA PROCESSING AND INTERPRETATION

At Matrix, we realize the importance of airborne data interpretation in order to maximize the usefulness of airborne geophysics as reconnaissance tool. The airborne data are used as base of our interpretation layout, overlying supplemental ground data and trying to identify similar prominent signatures in order to better direct future exploration programs. Integration of information from complementary datasets is a powerful part of the Matrix GeoTechnologies Ltd interpretation method and leads to a comprehensive understanding of the structural and geological area set.

The results of airborne geophysical surveys are processed with advanced data processing and interpretation methods, available in industry standard formats and high quality colored maps. Quality control and assurance after data acquisition procedures are well established in order to guarantee accuracy of the data.

Typical airborne services offered by Matrix GeoTechnologies Ltd are:

- Visual inspection of raw and corrections: Diurnal effects, Magnetic storms, Spherics, etc. (if required)

- Data processing and plotted final maps at scales agreed with clients

- Big scale data compilation and integration

- Reports of data processing and interpretation of results obtained from survey

- Identifying potential zone for further ground exploration

- Integrate airborne data with supplementary geoscientific interpretation

SHALLOW SEISMIC AND NON-DESTRUCTIVE TESTING

Shallow Seismic is commonly used to provide images of the subsurface, particularly in oil and gas exploration. In this technique, energy is put into the ground and then recorded as it reflects off of underground rock layers. Because different rocks reflect the energy in different ways, the returning signals can be used to produce images of the subsurface.

Seismic reflection technology has been applied to characterizing the shallow geology at locations that are environmentally contaminated; in detecting shallow subsurface voids that might be related to sinkholes, tunnels, or construction; in mapping faults or bedrock surfaces; degree of alteration and thickness of overburden and in other situations.

Seismic reflection profiling involves the measurement of two-way travel time of seismic waves artificially generated and transmitted from surface and reflected back to the surface at the interfaces between contrasting geological layers. Reflection of the transmitted energy will only occur when there is a contrast in the acoustic impedance (product of the seismic velocity and density) between these layers. The strength of the contrast in the acoustic impedance of the two layers determines the amplitude of the reflected signal. The reflected signal is detected on surface using an array of high frequency geophones. Seismic energy is provided by a 'shot' on surface. For shallow seismics this will normally comprise a hammer and plate, weight drop, or explosive charge.

We normally use seismic reflection and seismic refraction to map deeper elements of the subsurface or to correlate with GPR measurements. Analysis of seismic methods can give "engineer-related" information about the elastic properties of materials, such as density and porosity. SSR can also detect geologic structures in fault zones, find shallow soft layers of underground earth materials, reduce mapping uncertainties, and can greatly reduce the investigation costs of engineering projects.

SERVICES IN MINING

Geophysics is an essential tool for exploration and evaluation of mineralization in mines; however largely ignored. Our services in mining projects include the use of non-destructive tools resolving surface and underground issues such as environmental and exploration questions.

- Matrix's experience in mining includes rock engineering, slope stability, environmental monitoring and management, inmine geophysics for mine planning and underground geophysical surveys.

- A very important aspect of our services in mining is to explore the possible extension of know mineralization around and underneath actual mine using non-destructive geophysical tools.

- Our extensive experience in mining ensures innovative, cost effective and environmentally acceptable solutions from pre feasibility to site rehabilitation.

SERVICES IN CIVIL ENGINEERING AND ENVIRONMENTAL STUDIES Geotechnical and Geophysical Services

- Hydropower plants, dams and tunnels

- Roads, pipelines, civil and industrial construction, building or other structures

- Civil and military waste disposal (surface and underground)

- Multi-Disciplinary Geophysical Survey and non-destructive In-Situ Test in mine sites (surface and underground)

- Rock and Soil Physical-Mechanics Study (concrete, asphalt, gravel, sand etc)

- Fault and Structure Mapping

- Determination of physic-mechanical characteristics of the deposits and different rock formations

- Control and constant check of different civil\industrial works during the construction phase and their exploitation

- Sinkhole study

Geophysical Services in Hydrogeology and Geothermal

- Geomorphologic and structural study

- Defining the aquatic basin

- Study of water dynamics

- Physical Parameters Calculations of the aquatic basins

- Definition of the salinity contact of the water

Geophysical Services in Environmental Studies

- Geophysical Surveys on the natural and artificial karstic environments

- Landslide Studies in deposition and different rocky environments

- Prognosis and investigation of the solidity of different areas, and determination of their critical equilibrium

- Pollution, contamination and waste disposal studies

Seismic Microzoning Study

- Seismic Micro-zoning Study of Urban\Industrial Areas and in Strategic Works, such as bridges, towers etc.

Structure Condition Study

- Structure Condition Visual Study

- Structure Condition Sonic Study

- Structure Seismic Study

- GPR Survey

- X-Ray Concrete Inspection

- Compressive in-situ Strength Measurement of concrete, mortar and brick

- Finding the location, depth and size of reinforcement bars

- Measuring the thickness and quality of concrete

- Assessing the Corrosion currents in concrete

- Analyzing the Corrosion of concrete reinforcing steel in existing structures

- Laboratory Testing

Integrated Geophysical Methods

- Shallow Seismic

- Micro-noise Observation

- GPR

- Electrical Surveys

- EM \ VLF

- GPS\Micro Gravity

- Magnetics

- Geotechnical In-Situ Tests (rebound hammer, visual, sonic etc)

- Borehole logging

- Geothermics

Civil And Military Waste Disposal [Surface And Underground]

Keywords: Geophysical Techniques, Geophysics, interpretation, Surveys,

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