Download Figure 11. An Advanced Spaceborne Thermal
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Regional mapping of phyllic- and argillic-altered rocks in the Zagros magmatic arc, Iran, using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and logical operator algorithms by John C. Mars, and Lawrence C. Rowan
Geosphere Volume 2(3):161-186 June 1, 2006
©2006 by Geological Society of America
Figure 1. Illustrated deposit model of a porphyry copper deposit (modified from Lowell and Guilbert, 1970).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 2. Laboratory spectra of epidote, calcite, muscovite, kaolinite, chlorite, and alunite, which are common hydrothermal alteration minerals (Clark et al., 1993b).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
TABLE 1. ASTER BASELINE PERFORMANCE REQUIREMENTS.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 3. Location map of the Tertiary volcanic and igneous intrusive rocks of the Zagros magmatic arc and outline of Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) scenes used to map hydrothermally altered rocks.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 4. (A) Laboratory spectra of limonite, calcite, kaolinite, and alunite resampled to Landsat Multispectral Scanner (MSS), Thematic Mapper (TM), and Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) bandpasses.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 4. (A) Laboratory spectra of limonite, calcite, kaolinite, and alunite resampled to Landsat Multispectral Scanner (MSS), Thematic Mapper (TM), and Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) bandpasses.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 5. Index map of Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) scenes for the Iran study area.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 6. Spectra of playa from Cuprite, Nevada.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 7. Laboratory spectra of muscovite, kaolinite, and alunite resampled to Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) bandpasses.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 8. Relative band depth (RBD) ratio schematic (modified from Crowley et al., 1989).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 9. Laboratory and Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) spectra of dry sagebrush.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 10. (A) The logical operator algorithm that maps argillic-altered rocks using band ratios 4/5, 5/6, and 7/6, which define the 2.17 µm absorption feature.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 11. An Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) image of a granite outcrop and reflectance spectra from three locations.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 12. Generalized map showing the distribution of silicified (red map unit), opalized (blue map unit), and argillized (yellow map unit) rocks at Cuprite, Nevada (modified from Ashley and Abrams, 1980); inset map shows location of area in southern Nevada.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 13. Generalized geologic map of the Cuprite mining district, Nevada.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 14. Maps of argillic and phyllic rocks at Cuprite, Nevada, using logical operator algorithms: (1) Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) argillic alteration, (2) ASTER-simulated (AVIRIS) argillic alteration, (3) ASTER...
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 15. Average spectra of argillic and phyllic spectral units for Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) and ASTER-simulated (AVIRIS resampled to ASTER bandpasses) data.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 16. (A) Geologic map (modified from Huber, 1969a) and (B) a Landsat Thematic Mapper (TM) band 7 image with argillic and phyllic alteration units in the northwestern part of the study area mapped.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 17 (on this and previous page).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 17. Continued.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 18. (A) Geologic map and (B) Landsat Thematic Mapper (TM) band 7 image with mapped argillic and phyllic alteration of the area around the Sar Cheshmeh Copper Mine, Iran, in the central part of the study area (modified from Huber, 1969a).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 18. (A) Geologic map and (B) Landsat Thematic Mapper (TM) band 7 image with mapped argillic and phyllic alteration of the area around the Sar Cheshmeh Copper Mine, Iran, in the central part of the study area (modified from Huber, 1969a).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 19. (A) Geologic map and (B) Landsat Thematic Mapper (TM) band 7 image with mapped argillic and phyllic alteration of the Zagros-Makran transform zone, in the south-central part of the study area (modified from Huber, 1969b).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 20. (A) Geologic map and (B) Landsat Thematic Mapper (TM) band 7 image with mapped argillic and phyllic alteration of the area southeast of the Zagros-Makran transform zone, in the south-central part of the study area (modified from Huber, 1969b).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 21 (on this and previous page).
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 21. Continued.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
TABLE 2. KNOWN DEPOSITS AND PERCENTAGE OF ASSOCIATED SURFICIAL PHYLLIC- AND ARGILLIC-ALTERED ROCKS.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Figure 22. Histogram of percent alteration within a 1 km radius of 60 mine and occurrence sites in the central part of the study area.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Plate 1.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
Plate 2.
John C. Mars, and Lawrence C. Rowan Geosphere 2006;2:161-186
©2006 by Geological Society of America
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