Tabla 2. Fórmulas y bandas de serie CROSTA aplicadas a datos ASTER

Mineral o alteración Clave Fórmula ASTER Serie CROSTA Observaciones

Alunita ALI (7/5)(7/8) 1357

Alunita 6/5

OHIa

(7/6)(4/6)

OHIb

(7/5)(4/5)

Arcillas Clay (5+7)/6

Arcillas Clay2 (5/6)(7/6)

Alt. Argilica: Alu / kao / Pyro/ Arg (4+6)/5 (4+6)/(5*2)

Alt. Argilica avanzada 6/5

Alt. Filica: Phy (4+7)/6

Alt. Filica: 7/5

Alt. Filica: (Ser/Mus/ili/sme) Phy2 (5+7)/6

Alt. Propilica 8/5

Calcite y/o Clorita CLI (6/8)(9/8)

Kaolinita KLI (4/5)(8/6) 1467

Kaolinita KLIa 7(5+6)

Kaolinita 4/6 si

Kaolinita

Kaolinita + Smectite 1469

Illita Illi 1356 (4+7) / (6*2)

Illita Illi 1456 (4+7) / (6*2)

Muscovita 7/6 (4+7)/(6*2) (7+9)/(8*2)

OXIDOS: ferrico Fe3+ 2/1

OXIDOS: hematita* 3/1 *Req. Mascara de Vegetaciónn

Silicato Ferroso 5/4

GOSSAN 4/2

Oxido ferroso Fe2+ 5/3 + ½

Silicatos Ferrosos 4/3 *Alteración Oxido Fe, Cu - Au

Jarosita 4/7 (Origel Gutierrez)

Goetita (Origel Gutierrez)

Silice SiO2 Si 13/12

Rocas ricas en Cuarzo 14/12

Cuarzo, Carbonato QI (11/10)(11/12)

SiO2_3 11/10

SiO2_4 11/12

SiO2_5 13/10

SiO2_2 SiO2_2 ((11*11)/10) / 12

IInverso Silice (Feldespatos Alcalinos) (12/13) QI

Indice de Grado Basico 12/13

Granitoide (12/11)(11/10)

Dolomita (6+8)/7 ** (Origel Gutierrez) (6+8)/(7*2)

Carbonato 13/14 4689

Carbonato/Clorita/Epidota (7+9)/8

Epidota / Clorita / Anfibole (6+9)/(7+8)

Clorita 5/8 2458 / 2489

(4+7)/5

(4+7)/6

3457 PC4

3467

321

3479

5678

2358

12471259

Clorita

(Origel Gutierrez)

1358

PC4

PC3

Common Ratio & Band Combinations ASTER

Features Red Green Blue Reference Vegetation and visible bands**

3, 3/2, or NDVI

2 1

AlOH minerals/advancedargillic alteration***

5/6 (phen) 7/6 (musc) 7/5 (kaol) Hewson (CSIRO)

Clay, amphibole, laterite (5x7)/62 (clay) 6/8 (amph) 4/5 (lat) Bierwith

Gossan, alteration, host rock

4/2 (goss) 4/5 (alt) 5/6 (host) Volesky

Gossan, alteration, host rock

6 (goss) 2 (alt) 1 (host)

Decorellation (envi) 13 12 10 Bierwith

Silica, carbonate, basic degree index

(11x11)/10/12 (silica)

13/14 (carb) 12/13 (basic) Bierwith

Silica, carbonate (11x11)/(10x12) 13/14 12/13 Ninomiya

Silica 11/10 11/12 13/10 CSIRO

Discrimination for mapping

4/1 3/1 12/14 Abdelsalam

Discrimination in sulphide rich areas 12 5 3

Discrimination 4/7 4/1 (2/3) x (4/3) Sultan

Discrimination 4/7 4/3 2/1 Abrams (USGS)

Silica, Fe2+

14/12(1/2) + (5/3) MNF Band 1 Rowan (USGS)

Enhanced structural features

7 4 2 Rowan (USGS)

*Comments by Hewso**Equivalent to Landsat RGB 432 ***Alunite/pyrophyllit

n

e, mica, kaolinite/dickite

(8)

Features Red Green Blue Reference

Common Ratio & Band Combinations ASTER

4 5 9 (6) Assiri

Alteracion en color blanco y magenta

3/1 4/6 7/5 Alteracion Argilica en color verde y blanco amarillo

PC2 PC3 PC5 En Porfidos, la Alteraciones de color amarillo

PCA de las 6 Bandasdel SW IR

Para separar unidadesgeologicas 4/5 3 PC4 PCA de las 5 Bandas

del T IR

Usar Decorrelation Stretch

Tabla 2. Fórmulas y bandas de serie CROSTA aplicadas a datos ASTER

Mineral o alteración Fórmula ASTER Observaciones