TY - JOUR
T1 - ASTER mapping of limestone formations and study of caves, springs and depressions in parts of Sultanate of Oman
AU - Rajendran, Sankaran
AU - Nasir, Sobhi
N1 - Funding Information:
Acknowledgments The authors are thankful to NASA Land Processes Distributed Active Archive Center User Services, USGS Earth Resources Observation and Science (EROS) Center https:// LPDAAC.usgs.gov) for providing the ASTER data. The study is supported by Sultan Qaboos Internal grant IG/SCI/ETHS/12/02. The helps extended by Mr. Abdulla Al-Fahdi and Mr. Badar Al-Waili, Department of Earth Sciences, SQU are thankfully acknowledged for extending their valuable help in the preparation of thin sections and support. Authors are very much thankful to the anonymous reviewers and the editor of the journal for their valuable reviews and providing constructive comments and suggestions that have helped to present the work lucidly.
PY - 2014/1
Y1 - 2014/1
N2 - Caves, springs, and large depressions of limestone karst formations are becoming more attractive tourist places and have potential importance on socio-economic development. The present study is a multi-scale point of view on limestone karst, from the space images to microscopic fabric. Here, the karst features consist of limestone formations of Cretaceous (Albian-Cenomanian) age of Tanuf Valley and Tertiary (Late Paleocene-Middle Eocene) age of Sur region of parts of Sultanate of Oman which are mapped in the visible near-infrared and shortwave infrared spectral bands of advanced spaceborne thermal emission and reflection radiometer (ASTER) using decorrelated stretch image processing technique and the occurrences of caves, springs, and depressions of the formations in the field were studied. The decorrelated RGB images of ASTER spectral bands 8, 3, and 1 discriminated well the limestone formations and associated lithology. The limestone formations of Tanuf valley (Natih formations of Hajar unit) are thick-bedded, massive, shallow marine limestone and clayey limestone, which have caves and springs. Large depressions are studied as collapsed structures at the boundary between Abat formations; they consist of gray to white marly or micritic limestone with chert nodules and Seeb Formation of bioclastic limestone, calcarenite, marl, and sandstone of Sur region. Interpretations of limestone formations, their occurrences and distributions of caves, springs and depressions of these regions are verified and confirmed in the field and studied in the laboratory. Occurrences of more springs and depressions in the limestone formations of the study sites are interpreted and located on the Google Earth image. The study proved the capability of ASTER sensor in mapping of limestone formations and recommends the technique to other geographical regions where similar geological questions need to be resolved.
AB - Caves, springs, and large depressions of limestone karst formations are becoming more attractive tourist places and have potential importance on socio-economic development. The present study is a multi-scale point of view on limestone karst, from the space images to microscopic fabric. Here, the karst features consist of limestone formations of Cretaceous (Albian-Cenomanian) age of Tanuf Valley and Tertiary (Late Paleocene-Middle Eocene) age of Sur region of parts of Sultanate of Oman which are mapped in the visible near-infrared and shortwave infrared spectral bands of advanced spaceborne thermal emission and reflection radiometer (ASTER) using decorrelated stretch image processing technique and the occurrences of caves, springs, and depressions of the formations in the field were studied. The decorrelated RGB images of ASTER spectral bands 8, 3, and 1 discriminated well the limestone formations and associated lithology. The limestone formations of Tanuf valley (Natih formations of Hajar unit) are thick-bedded, massive, shallow marine limestone and clayey limestone, which have caves and springs. Large depressions are studied as collapsed structures at the boundary between Abat formations; they consist of gray to white marly or micritic limestone with chert nodules and Seeb Formation of bioclastic limestone, calcarenite, marl, and sandstone of Sur region. Interpretations of limestone formations, their occurrences and distributions of caves, springs and depressions of these regions are verified and confirmed in the field and studied in the laboratory. Occurrences of more springs and depressions in the limestone formations of the study sites are interpreted and located on the Google Earth image. The study proved the capability of ASTER sensor in mapping of limestone formations and recommends the technique to other geographical regions where similar geological questions need to be resolved.
KW - ASTER data
KW - Caves
KW - Limestone formations
KW - Spectral absorptions
KW - Springs
KW - Sultanate of Oman
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U2 - 10.1007/s12665-013-2419-7
DO - 10.1007/s12665-013-2419-7
M3 - Article
AN - SCOPUS:84892445765
SN - 1866-6280
VL - 71
SP - 133
EP - 146
JO - Environmental Earth Sciences
JF - Environmental Earth Sciences
IS - 1
ER -