Tabla 2. Fórmulas y bandas de serie CROSTA aplicadas a datos ASTER Mineral o alteración Clave Alunita Alunita ALI OHIb Alunita, Pirofilita Montmorillonita, Micas OHIa Arcillas Arcillas Alt. Argilica: Alu / kao / Pyro/ Alt. Argilica avanzada Alt. Filica: Alt. Filica: Kaolinite Clay Clay2 Arg Alt. Filica: (Ser/Mus/ili/sme) Alt. Propilica Calcite y/o Clorita Phy2 Kaolinita Kaolinita Kaolinita Kaolinita Kaolinita + Smectite Illita Illita Muscovita OXIDOS: ferrico Fe3+ OXIDOS: hematita* Silicato Ferroso GOSSAN Oxido ferroso Fe2+ Silicatos Ferrosos Jarosita Goetita Silice SiO2 Rocas ricas en Cuarzo Cuarzo, Carbonato SiO2_3 SiO2_4 SiO2_5 SiO2_2 Phy CLI KLI KLIa Illi Illi Si QI Clorita Clorita (5+7)/6 (5/6)(7/6) (4+6)/5 6/5 (4+7)/6 7/5 (5+7)/6 8/5 (6/8)(9/8) (4/5)(8/6) 7(5+6) 4/6 si (4+7)/6 Ninomiya PC4 Ninomiya Ninomiya Rowan, CSIRO (5*7) / (6*6) (4+6)/(5*2) Epitermal Aproximate only Epitermal Yeso White MICA Al-rich (Musc, Parag) Endoskarn - Porphyry Ninomiya 1467 3467 Ninomiya PC4 1469 (4+7) / (6*2) 1356 1456 (4+7) / (6*2) (4+7)/(6*2) (7+9)/(8*2) 7/6 Rowan 1234 Epitermal 2/1 321 3/1 *Req. Mascara de Vegetación n CSIRO Biotita, Chlorita, Amphibole Endoskarn - Porphyry 5/4 Volesky 4/2 Rowan 5/3 + ½ *Alteración Oxido Fe, Cu - Au Epitermal 4/3 1247 (Origel Gutierrez) 4/7 1259 (Origel Gutierrez) 13/12 Rowan 14/12 (11/10)(11/12) (11*11) / (10*12) 11/10 11/12 13/10 Silica Silica Epitermal Epitermal Epitermal Silica (12/13) QI Exoskarn (Gnt, Px) 12/13 (12/11)(11/10) (6+8)/(7*2) (6+8)/7 5678 ** (Origel Gutierrez) Calcite, Dolomite 13/14 4689 Exoskarn (7+9)/8 (6+9)/(7+8) 2358 Endoskarn-Porphyry 2458 / 2489 (Origel Gutierrez) 5/8 1358 PC3 (5+7)/8 Amphibole (Hornblenda, Actinolite, Tremolita) 6/8 Carbonatos 4/8 8/5 Biotita, Gneiss, Migmatitas Observaciones SiO2_2 ((11*11)/10) / 12 Inverso Silice (Feldespatos Alcalinos) I Indice de Grado Basico Granitoide Dolomita Carbonato Carbonato/Clorita/Epidota Epidota / Clorita / Anfibole Serie CROSTA Fórmula ASTER (7*7) / (5*8) (7/5)(7/8) 1357 3457 6/5 (4+7)/5 (4*7) / (5*5) (7/5)(4/5) (7/6)(4/6) Background Display Black to White (B1 eq 0) * 255 + (B1 gt 0.1) * B1 (6+9)/8 Ninomiya CSIRO CSIRO CSIRO Bierwith Ninomiya Rowan CSIRO Bierwith Exoskarn Calcita, Dolomita 3479 Common Ratio & Band Combinations ASTER Features Red Vegetation and visible bands** AlOH minerals/advanced argillic alteration*** Clay, amphibole, laterite 3, 3/2, or NDVI Gossan, alteration, host rock Gossan, alteration, host rock Decorellation (envi) Silicification Silica, carbonate, basic degree index Silica, carbonate Silica Silicification Discrimination for mapping Discrimination in sulphide rich areas Discrimination Discrimination Silica, Fe2+ Green 5/6 (phen) (5x7)/62 (clay) 4/2 (goss) 6 (goss) 13 (11x11)/10/12 (silica) (11x11)/(10x12) Blue Reference 2 1 7/6 (musc) 7/5 (kaol) 6/8 (amph) 4/5 (lat) 4/5 (alt) 2 (alt) 12 13/14 (carb) 5/6 (host) Bierwith 12/13 (basic) Bierwith 11/12 13/10 4/1 3/1 12/14 12 5 4/7 4/1 4/7 4/3 (2/3) x (4/3) 2/1 (1/2) + (5/3) MNF Band 1 4 2 7 Mapeo Litologico 4/7 4/6 4/10 Mapeo Litologico 7/6 6/5 6/4 4/5 4/6 4/7(8) *Comments by Hewson **Equivalent to Landsat RGB 432 ***Alunite/pyrophyllite, mica, kaolinite/dickite Mapeo Litologico Ninomiya CSIRO Abdelsalam 3 Enhanced structural features Alteracion de color Blanco Volesky 10 12/13 14/12 Bierwith 1 (host) 13/14 11/10 Hewson (CSIRO) Sultan Abrams (USGS) Rowan (USGS) Rowan (USGS) Sabree Gad Common Ratio & Band Combinations ASTER Features Mapeo de Menas de Fierro Mapeo de Litologia asociada Alteracion en color blanco y magenta Alteracion Argilica en color verde y blanco amarillo En Porfidos, la Alteracion es de color amarillo Para separar unidades geologicas Red Green (1+3)/2 (2+4)/3 4 Blue Reference (3+5)/4 (5+7)/6 Sankaran Rajendran (5+7)/6 (7+9)/8 Sankaran Rajendran 5 3/1 (6) 4/6 9 Assiri Usar Decorrelation Stretch 7/5 PC2 PC3 PC5 4/5 3 PC4 PCA de las 6 Bandas del SW IR PCA de las 5 Bandas del T IR Tabla 2. Fórmulas y bandas de serie CROSTA aplicadas a datos ASTER Mineral o alteración Fórm ula ASTER Observaciones