Sub-surface paleochannel detection in DeGrussa area, Western Australia, using thermal infrared remote sensing

S. Thakur, B. Chudasama, Alok Porwal, Ignacio Gonzalez-Alvarez

Research output: Chapter in Book/Conference paperConference paperpeer-review

2 Citations (Scopus)


© 2016 SPIE.Thermal Infrared (TIR) remote sensing measures emitted radiation of Earth in the thermal region of electromag- netic spectrum. This information can be useful in studying sub-surface features such as buried palaeochannels, which are ancient river systems that have dried up over time and are now buried under soil cover or overlying sed- iments in the present landscape. Therefore they have little or no expression on the surface topography. Study of these paleochannels has wide applications in the fields of uranium exploration and ground water hydrology. Iden- tifying paleochannels using remote sensing technique is a cost-effective means of narrowing down search areas and thereby aids in ground exploration. The difference in thermal properties between the paleochannel-fill sediments and the surrounding bed-rock is the key to demarcate these channels. This study uses five TIR bands of day- time Advanced Spaceborne Thermal Emission and Reection Radiometer (ASTER) L1A data for delineation of paleo-systems in the DeGrussa area of the Capricorn Orogen in Western Australia. The temperature-emissivity separation algorithm is applied to obtain kinetic temperature and emissivity images. Sharp contrasts in kinetic temperature and emissivity values are used to demarcate the channel boundaries. Profiles of topographic eleva- tion, temperature and emissivity values are plotted for different sections of the interpreted channels and compared to distinguish the surface channels from sub-surface channels, and also to interpret the thickness and nature of the paleochannel-fill sediments. The results are validated using core-drilling lithologs and field exploration data.
Original languageEnglish
Title of host publicationProceedings of SPIE: Land Surface and Cryosphere Remote Sensing III
EditorsR Khanbilvardi , A Ganju, A.S Rajawat, J.M Chen
Place of PublicationIndia
PublisherS P I E - International Society for Optical Engineering
ISBN (Print)9781510601185
Publication statusPublished - 2016
EventLand Surface and Cryosphere Remote Sensing III - New Delhi, India
Duration: 4 Apr 20167 Apr 2016


ConferenceLand Surface and Cryosphere Remote Sensing III
CityNew Delhi


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