Objective
DEVELOPMENT OF AN OPERATIONAL SYSTEM FOR EXPLORATION USING MULTIDATA CORRELATION AND REMOTE SENSING IMAGERIES.
A deeper understanding of spectral signatures measured by today's available space and field sensors and their contribution to integrated data analysis for exploration purposes has been assessed.
Laboratory and field optical spectroscopy is a fast low cost method for geological mapping, the detection of trace minerals (eg alteration minerals), the analysis of changes in mineral composition (eg contact zone) and the reduction of other expensive laboratory analysis. Real handheld field spectrometers could be used very soon as a standard geophysical tool, for mapping and exploration by geologists working in the field, especially when the existing data analysis software packages are improved and extended due to the results of different case studies and application scenarios (mineralisation type, ore genesis, environmental conditions, climate and alteration effects). Laboratory and field optical spectroscopy provides the basis to develop interpretation strategies for satellite and airborne data and to avoid misinterpretations of data (eg due to the mixed signature problem).
Laboratory and field optical spectroscopy is a fast and low cost method for geologic mapping, the detection of tracing minerals (eg alteration minerals), the analysis of changes in mineral composition (eg contact zones) and the reduction of other expensive laboratory analysis.
A deeper understanding of spectral signature measured by today's available space and field sensors and their contribution to integrated data analysis for exploration purposes is regarded the overall aim for the project. The following research aspects had been covered:
development of spectral based processing concepts for existing satellite sensors (thematic mapper (TM), System Probatoire d'Observation de la Terre(SPOT));
construction of an exploration database for a limited test area of approximately 25 km{2} and development of efficient analysis procedures;
the focusing of all spectral data processing and integrated analysis on mineral suites which are of special interest.
The most important results obtained from this research are grouped in 2 main categories.
A very target specific project concentrated on the problem of detecting buried granitic cupolas with associated tungsten/tin type mineralizations by means of recently available satellite data. A rather reliable and operational method was developed allowing a preselection of target areas for detailed assessment. Even including some anomalies not relevant to granites, this procedure reduced the number of potential target areas significantly and can be regarded an efficient procedure.
A rasterbased, spatial exploration databank (EDB) had been designed, implemented and tested, using a 3-level approach to facilitate data management. The existence of a map sheet oriented geological database was a vital prerequisite. Thematic relevant data from different sources had been introduced and subsequently enhanced towards the level 3 which consists of condensed data sets in respect to mineral targets. Sophisticated display techniques allow the combination of up to 6 thematically enhanced data layers. Weak anomalies in the individual sets often cause prominent features in the level 3 products. With the 3-level database design and the definition of colour coded synthetic stereo images with contour lines, a powerf ul and flexible tool for decision making in exploration could be established.
Laboratory and field optical spectroscopy is a fast and low cost method for geological mapping, the detection of tracing minerals (eg, alteration minerals), the analysis of changes in mineral composition (eg, contact zones) and the reduction of expensive laboratory analysis.
Real handheld field spectrometers could be used very soon as a standard geophysical tool for mapping and exploration by geologists working in the field, especially when the existing data analysis software packages are improved and extended by the results of different case studies and application scenarios (mineralization type, ore genesis, environmental conditions, climate and alteration effects).
Carbon dioxide laser laboratory spectroscopy increases the analysis potential of visible and near infrared spectroscopy data due to the diagnostic spectral features of minerals in the thermal infrared and the often observed redundancy of spectroscopic effects of minerals in the shortwave (oxide overtones) and thermal infrared (molecular vibrations).
Laboratory and field spectroscopy provide the basis to develop interpretation strategies for satellite and airborne data and to avoid misinterpretations of those data (eg, due to the mixed signature problem). Also, optical field spectroscopy is an excellent tool for mapping and exploration in a partly vegetation covered environment (mixed signatures).
First results of high spectral resolution airborne data, obtained using the airborne scanner are very promising; the spectral information in the shortwave infrared wavelength region between 2.0 um and 2.4 um (28 spectral bands) provides a valuable potential for exploration applications.
IN THE FRAMEWORK OF THE ALMADEN PROJECT THE TWO LABORATORIES WILL PERFORM THE DEVELOPMENT OF SPECTRAL PROCESSING CONCEPTS FOR RECENT AND FUTURE REMOTE SENSING DATA AND THEIR ANALYSIS BY MEANS OF A GEOGRAPHIC INFORMATION SYSTEM STRUCTURE FOR EXPLORATION PURPOSES.
IT IS PROPOSED TO DEVELOP A SPECTRAL BASED PROCESSING CONCEPT FOR TM, ATM, SPOT DATA AND FUTURE SENSORS (CCD-CAMERAS, MULTISPECTRAL THERMAL SCANNERS, LASER SENSORS) DURING THE PROJECT'S DURATION, TO IMPROVE THE USE OF RS-DATA FOR PURPOSES OF DETECTING LITHOLOGICAL AND GEOBOTANICAL ANOMALIES IN RELATION TO MINERALIZATIONS IN THE ALMADEN CONCESSION AREA (HG, P, PB-ZN-AG, SN-W, AU-AS, INDUSTRIAL MINERALS).
THE ACTIVITIES HAVE TO BE SPLIT BETWEEN GAF AND DFVLR, THE MAJOR RESEARCH TOPICS ARE:
- DEVELOPMENT OF A SPECTRAL ANALYSIS CONCEPT FOR ANOMALIES RELEVANT TO MINERALIZATIONS ON THE BASIS OF SPECTROSCOPIC SAMPLING;
- DEVELOPMENT OF AN IMAGE PROCESSING CONCEPT TO ENHANCE EFFECTIVELY SPECTRAL ANOMALIES;
- INTEGRATED ANALYSIS OF DERIVED SPECTRAL ANOMALIES AND OTHER GEO-DATA SETS FOR A SELECTED TEST-SITE OF A GEOGRAPHIC INFORMATION SYSTEM.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences earth and related environmental sciences physical geography cartography geographic information systems
- natural sciences chemical sciences inorganic chemistry transition metals
- natural sciences physical sciences optics spectroscopy absorption spectroscopy
- natural sciences computer and information sciences data science data processing
- natural sciences physical sciences optics laser physics
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Coordinator
80636 München
Germany
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