Fó rmulas y bandas de serie CROSTA aplicada rmulas aplicadas s a datos ASTER Mineral o alteración
Clave
Fórmula ASTER
ALI
Arcillas banda 6
OHIa
Arcillas banda 6
OHIb
(7/5)(7/8) 6/5 (7/6)(4/6) (7/5)(4/5)
Arcillas
OHI
OHIa AND OHIb
Arcillas
Clay
Arcillas
Clay2
(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 7/5 ?
Alunita Alunita
Alt. Argilica: Alu / kao / Pyro/ Arg Alt. Argilica avanzada Alt. Filica:
Phy
Alt. Filica: Kaolinite Alt. Filica: (Ser/Mus/ili/sme)
Phy2
Alt. Propilica Clorita y/o Calcite
CLI
Kaol inita
KLI
Kaol inita
KLIa
Kaolinita Kaolinita
Serie CROSTA 1357
Il li
Ill ita
Il li
Muscovita OXIDOS: ferrico Fe3+ OXIDOS: hematita* Silicato Ferroso GOSSAN Oxido ferroso Fe2+ Silicatos Ferrosos Jarosita
(4*7) / (5*5)
(5*7) / (6*6)
*puede ser (4+6) / (5*2) Epitermal
White MICA Al-rich (Musc, Parag)
Si QI
Clay – KLIa Clay – KLIa 7/6 2/1 3/1 5/4 4/2 5/3 + ½ 4/3 4/7
Ninomiya
1467
Epitermal
1356
SiO2_2
SiO2_2 ((11*11)/10) / 12
Inverso Silice (Feldespatos Alcalinos) I
Carbonato/Clorita/Epidota Epidota / Clorita / Anfibole Clorita
Amphibole (Hornblenda, Actinolite, Tremolita)
1234
Epitermal
Rowan
321
n *Req. Mascara de Vegetación CSIRO Endoskarn Porphyry Biotita, Chlorita, Amphibole Volesky
Rowan *Alteración Oxido Fe, Cu - Au
1247
Epitermal (Origel Gutierrez) (Origel Gutierrez) Rowan (11*11) / (10*12) Epitermal
Silica Silica
Epitermal Epitermal
Silica
Ninomiya CSIRO CSIRO CSIRO Bierwith
(12/13) QI Exoskarn (Gnt, Px) 12/13 (12/11)(11/10) 5678** (Origel Gutierrez) (6+8)/7 *Puede ser (6+8) / (7*2) Exoskarn Ninomiya Calcite, Dolomite 4689 13/14 Rowan (7+9)/8 Endoskarn-Porphyry CSIRO (6+9)/(7+8) 2458/2489 (Origel Gutierrez) 2358 1258 Burcu Fatma Pekesin 5/8 (6+9) / 8 6/8 Bierwith
Carbonatos
4/8
Calcita, Dolomita
Biotita, Gneiss, Migmatitas
8/5
3479
Calcite
USGS (4+7) / (6*2) USGS (4+7) / (6*2) (7+9)/(8*2) (4+7)/(6*2) Y
1456
(11/10)(11/12)
SiO2_5
SiO2_4
Carbonato
Aproximate only
13/12 14/12 11/10 11/12 13/10
SiO2_3
Dolomita
Endoskarn - Porphyry
Ninomiya
1259
Rocas ricas en Cuarzo
Indice de Grado Basico
Ninomiya Rowan, CSIRO
Goetita
Granitoide
Ninomiya
1469
Ill ita
Cuarzo, Carbonato
(7*7) / (5*8)
Ninomiya
Kaolinita + Smectite
Si lic e Si O2
Observaciones
3918
Exoskarn
Burcu Fatma Pekesin
Common Ratio & B and 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 Volesky
1 (host) 10
Bierwith
12/13 (basic)
Bierwith Ninomiya
13/14
12/13
11/12
13/10
4/1
3/1
12/14
12
5
4/7
4/1
4/7
4/3
2/1
(1/2) + (5/3)
MNF Band 1
Rowan (USGS)
4
2
Rowan (USGS)
11/10
14/12
(2/3) x (4/3)
7
Mapeo Litologico
4/7
4/6
4/10
Mapeo Litologico
7/6
6/5
6/4
4/5
4/6
4/7
*Comments by Hewson **Equivalent to Landsat RGB 432 ***Alunite/pyrophyllite, mica, kaolinite/dickite
Mapeo Litologico
CSIRO Abdelsalam
3
Enhanced structural features
Alteracion de color Blanco
Hewson (CSIRO)
Sultan Abrams (USGS)
Sabree Gad
Common Ratio & B and Combinations ASTER
Features Mapeo de Menas de Fierro Mapeo de Litologia asociada
Red (1+3)/2 (2+4)/3
Green
Blue
Reference
(3+5)/4
(5+7)/6
Sankaran Rajendran
(5+7)/6
(7+9)/8
Sankaran Rajendran
Formulas y bandas de serie CROSTA aplicadas a datos LANDSAT Mineral o alteración
Fórmula
LANDSAT
Observaciones
Serie CROSTA
Alunita, ARCs, Silice
5/7
Limonitas, Goethita
3/1
2 3 4 5 PC4
Hematita, Magnetita
5/4
1 3 4 7 PC4 Louglin
Louglin
1457
1345 NUBES - NIEVE Defoliant Technique Oxidos de Fe Clay
123
Hassen
PC1 (Invertida)
DPC (Directed Principal Components) Oxs Vegetation Frase and Green, 1987 4/3 3/1 4/3
5/7
The Vegetation Component has Positive Loading in both input images.
The Mineral Component has Loadings of oppossite Signs. If the Mineral Component has Positive Loadings then that mineral is mapped as bright pixels in the mineral images.
Formulas y bandas de serie CROSTA aplicadas a datos LANDSAT Mineral o alteración
Fórmula
LANDSAT
Observaciones
Serie CROSTA
Mineral Images Band Ratio Images input to DPC (Directed Principal Components) Quartz
Vegetation 2/3
Mineral 7/1
Alunite
2/3
5/1
Illite
4/2
7/1
Chlorite
4/2
5/1
Epidote
4/1
5/7
2/3
5/1
Limonite, Goethite
John Carranza, 2000 The Vegetation Component has Positive Loading in both input images. The Mineral Component has Loadings of oppossite Signs. If the Mineral Component has Positive Loadings then that mineral is mapped as bright pixels in the mineral images.
FIGURA 2: Reflectance Spectra of Minerals (Clark et al., 1993; USGS, 1998)
Quartz
Illite
Alunite
Chlorite
Green Vegetation
Epidote
5
4
Epidote Goethite Illite 1, 5 Jarosite Kaosmectite
1 7
4
5
1
7 Buddingstonite Dickite Dolomite Pyrophyllite
4 Diaspore Halloysite 5 1
Illite 4
7
Common Ratio & B and Combinations LANDSAT
Features
Red
Green
Epithermal
5/7 Clay
Epithermal
5/7
Delinear Unidades Litologicas Gossan Iron Clay Alteration Anomalies
Blue
Reference
3 / 1 (2) Iron-oxide
3/5
4/5
3/1
Sabins Abrams Abdel Salam Abrams
3 / 4 * 5 /4
Sultan
3/1
5/7
Sabins
3
1
5/7
5
7
3/1
5/4 Silica
5/7
5/7
5/1
3/5 3/1
5/4 Gossan
5/4
Hydrothermal Alteration Hydrothermal Alteration
7/4 Iron ions 5/7 Clay
7 7 4/3 Vegetation 5/4 Iron ions
5/7 3/1 5/7 Clay 3/1 Ferrous Oxide
Kaufmann Chica-Olma
