Geological investigations with high spatial resolution WV-3 satellite imagery and regional geophysics at the Haib Cu porphyry, Namibia

R. D. Hewson; E. Chinkaka; M. van der Meijde; B. Baugh; N. Titus; J. P. Mubita

doi:10.1080/22020586.2019.12073089

2nd Australasian Exploration Geoscience Conference: Data to Discovery

ISSN: 2202-0586
E-ISSN:

oa Geological investigations with high spatial resolution WV-3 satellite imagery and regional geophysics at the Haib Cu porphyry, Namibia
Authors R. D. Hewson^a, E. Chinkaka^b, M. van der Meijde^c, B. Baugh^d, N. Titus^e and J. P. Mubita^f
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^a ITC University of Twente, PO Box 217, 7500AE, , Netherlands, [email protected] ^b ITC University of Twente, PO Box 217, 7500AE, , Netherlands, [email protected] ^c ITC University of Twente, PO Box 217, 7500AE, , Netherlands, [email protected] ^d DigitalGlobe Inc. Westminster, Colorado, , USA, [email protected] ^e 6 Aviation Rd Namibian Geological Survey Windhoek, , Namibia, [email protected] ^f 6 Aviation Rd Namibian Geological Survey Windhoek, , Namibia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 5
DOI: https://doi.org/10.1080/22020586.2019.12073089
- Published online: 01 Dec 2019

Abstract

Summary

Recent improvements in available multi-spectral satelliteborne shortwave infrared sensors and their spatial resolution opens up the opportunity for furthering surface mineralogy mapping. Their image interpretation can be augmented with regional geophysics, e.g. subsurface structural information via magnetics or fine tuning the interpretation of mineral chemistry using radioelement data. The new higher spatial resolution satellite WorldView-3 sensor is compared in this study with the ASTER satellite imagery over the Haib copper prospect in southern Namibia using published geology and airborne hyperspectral imagery control.

The results show an improvement using higher spatial resolution combined with improvements in SWIR imagery for the mapping of different AlOH clays, potentially related phyllic and argillic alteration that may be associated with structurally controlled alteration and mineralisation.

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References

Abrams, M., H. Tsu, G. Hulley, K. Iwao, D. Pieri, T. Cudahy, and J. Kargel, 2015, The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) after fifteen years: Review of global products, International Journal of Applied Earth Observation and Geoinformation, 38, 292-301, doi: http://dx.doi.org/10.1016/j.jag.2015.01.013.
Blignault, H. J., 1972, Geological Map of Haib area. Geological Survey of Namibia. Windhoek.
Chinkaka, E., 2019, Integrating WorldView-3, ASTER and aeromagnetic data for lineament structural interpretation and tectonic evolution of the Haib area, Namibia” MSc Thesis, University of Twente.
Crowley, J.K., Brickey, D.W. and Rowan, L.C., 1989, Airborne imaging spectrometer data of the Ruby Mountains, Montana: mineral discrimination using relative absorption band depth images. Remote Sensing of Environment, vol. 29, no. 2, 121–134.
Cudahy, T.J., 2012, Australian ASTER Geoscience Product Notes, Version 1, 7th August, 2012 – CSIR0, ePublish No. EP-30-07-12-44, 2012.
Kruse, F. A., Baugh, W. M. and Perry, S. L., 2015, Validation of DigitalGlobe WorldView-3 Earth imaging satellite shortwave infrared bands for mineral mapping, Journal of Applied Remote Sensing, 9(1), 96044., https://doi.org/10.1117/1.JRS.9.096044
Hewson, R.D. and Cudahy, T.J., 2011, Issues affecting geological mapping with ASTER data: a case study of the Mt Fitton area, South Australia. In: Ramachandran, B., ed. Land Remote Sensing and Global Environmental Change: NASA s Earth Observing System and the Science of ASTER and MODIS: Applications in ASTER, Springer-Verlag, New York, ISBN: 978-1-4419-6748-0.
Teck Cominco Namibia Ltd, 2009, Renewal Report: Exclusive Prospecting Licence 3140. Retrieved from https://www.deepsouthresources.com/wpcontent/ uploads/Haib_NI43-101_May-3-2016_FINAL.pdf
Hewson R.D., Cudahy T., Mizuhiko S., Ueda K., and Mauger A.J., 2005, Seamless geological map generation using ASTER in the Broken Hill-Curnamona Province of Australia. Remote Sensing of Environment, 99:159–172.

/content/journals/10.1080/22020586.2019.12073089

Article Type: Research Article

Keyword(s): argillic mineralisation; ASTER; Haib; radiometrics; WorldView-3

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oa Geological investigations with high spatial resolution WV-3 satellite imagery and regional geophysics at the Haib Cu porphyry, Namibia

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