|
|
|
|
|
|
LTX-54
|
Piedra Labrada, Los Tuxtlas
|
-94.85
|
18.34
|
Alk.-Basalt
|
K/Ar
|
|
0.96
|
0.09
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
M 238
|
Cantaro Complex, Colima
|
-103.66
|
19.64
|
Andesite Ho
|
K/Ar
|
Pl
|
0.95
|
0.17
|
Allan 1986
|
|
|
|
|
|
|
|
|
634
|
Mesa S. Rosa, Jal.
|
-103.71
|
20.90
|
Basalt
|
K/Ar
|
WR
|
0.93
|
0.05
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
TUX-107
|
Plateau S. Andres, Tuxtlas
|
-95.25
|
18.46
|
Alk.-Basalt
|
K/Ar
|
|
0.93
|
0.19
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
*
|
Cerro el Gallo, Mich.
|
-100.64
|
19.76
|
Rhyolite
|
K/Ar
|
WR
|
0.93
|
0.00
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
Ped Jal 5
|
Tequilizinta, Jal.
|
-103.75
|
20.91
|
Alk.-Bas.
|
K/Ar
|
WR
|
0.91
|
0.22
|
Damon et al., 1979
|
|
|
|
|
|
|
|
|
LG 4
|
Iztaccihuatl
|
-98.68
|
19.21
|
Dacite
|
K/Ar
|
WR
|
0.90
|
0.07
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
Tep 2
|
Entronque Jumatán, Nay.
|
|
|
Alk.- Basalt
|
K/Ar
|
WR
|
0.90
|
0.10
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
Ar 08
|
C. Izote, (SE S. Pedro), Nay.
|
|
|
Andesite
|
K/Ar
|
Amph
|
0.90
|
0.20
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
|
Atotonilco Bajo, Jal.
|
-103.77
|
20.40
|
Basalt
|
K/Ar
|
WR
|
0.90
|
|
CFE 1980
|
|
|
|
|
|
|
|
|
RGS 15
|
La Ollita, Jal.
|
-103.70
|
20.90
|
Alk.-Basalt
|
K/Ar
|
gms
|
0.88
|
0.03
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
TUX-73
|
C. S. Matin, Los Tuxtlas
|
-94.73
|
18.35
|
Alk.-Basalt
|
K/Ar
|
|
0.87
|
0.04
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
N 340
|
C. Sanambo, Mich.
|
-101.40
|
19.61
|
Andesite
|
K/Ar
|
WR
|
0.87
|
0.05
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
Mex 219
|
W Ucareo, Mich.
|
-100.75
|
19.88
|
Andes.-Bas.
|
K/Ar
|
WR
|
0.87
|
0.10
|
Ferrari et al., 1991
|
|
|
|
|
|
|
|
|
*
|
Cerro el Gallo, Mich.
|
-100.66
|
19.80
|
Rhyolite
|
K/Ar
|
glass
|
0.84
|
0.02
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
Mex 126
|
C. Las Ventanas, Mich.
|
-101.38
|
19.98
|
Andesite
|
K/Ar
|
WR
|
0.83
|
0.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
LI 114
|
Chiconquiaco-Palma Sola
|
-96.79
|
19.70
|
Basanite
|
K/Ar
|
WR
|
0.82
|
0.80
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
AZ 74
|
Zapote Alto, Mich.
|
-100.81
|
19.80
|
Basic Andesite
|
K/Ar
|
WR
|
0.81
|
0.08
|
Pradal and Robin, 1994
|
|
|
|
|
|
|
|
|
NT 01
|
Sta. Clara del Tule, Mich.
|
|
|
Basalt
|
Ar/Ar
|
WR
|
0.80
|
0.06
|
Suter, Lopez, Quintero, unpublished
|
|
|
|
|
|
|
|
|
LTX-97
|
Plateau S. Andres, Tuxtlas
|
-95.18
|
18.39
|
Alk.-Basalt
|
K/Ar
|
WR
|
0.80
|
0.40
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
AZ 124
|
Zapote Alto, Mich.
|
-100.74
|
19.83
|
Basic Andesite
|
K/Ar
|
WR
|
0.79
|
0.06
|
Pradal and Robin, 1994
|
|
|
|
|
|
|
|
|
Ar 04
|
San Pedro dome, Nay.
|
|
|
Andesite
|
K/Ar
|
gms
|
0.79
|
0.16
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
Ar 12
|
C. Las Cuevas, Nay.
|
|
|
Andesite
|
K/Ar
|
gms
|
0.78
|
0.16
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
|
|
|
|
Ignimbrite
|
K/Ar
|
WR
|
0.77
|
0.06
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
AZ 157
|
Agua Fria, Mich.
|
-100.65
|
19.79
|
Rhyolite
|
K/Ar
|
WR
|
0.76
|
0.06
|
Pradal and Robin, 1994
|
|
|
|
|
|
|
|
|
Mex 211
|
Cuto del Porvenir, Mich.
|
-101.72
|
19.83
|
Andesite
|
K/Ar
|
WR
|
0.76
|
0.15
|
Ferrari et al., 1991
|
|
|
|
|
|
|
|
|
Mex 222
|
Cuto Porvenir, Mich.
|
-101.06
|
19.88
|
Bas.- andesite
|
K/Ar
|
WR
|
0.75
|
0.10
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
Ar 03
|
Mesa S. Isabel, Nay.
|
|
|
Andesite
|
K/Ar
|
gms
|
0.75
|
0.20
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
JH-108
|
V. Las Navajas, Nay.
|
|
|
Obsidian
|
K/Ar
|
Glass
|
0.72
|
0.70
|
Nelson, unpublished
|
|
|
|
|
|
|
|
|
|
Volcan Tequila, Jal.
|
-103.85
|
20.85
|
Basalt
|
K/Ar
|
WR
|
0.68
|
|
CFE 1980
|
|
|
|
|
|
|
|
|
LV-167
|
C. La Laja (Atenguillo), Jal.
|
-104.48
|
20.52
|
Alk.-Basalt
|
K/Ar
|
gms
|
0.67
|
0.04
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
Hz 26
|
Zitacuaro area, Mich.
|
-100.32
|
19.37
|
Dacite
|
K/Ar
|
gms
|
0.67
|
0.07
|
CFE, 1992b
|
|
|
|
|
|
|
|
|
Ve 4
|
Cerro El Burro, V. Esc.
|
-101.50
|
19.43
|
Andesite
|
K/Ar
|
WR
|
0.66
|
0.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
KR-102
|
C. La Laja (Atenguillo), Jal.
|
-104.47
|
20.52
|
Alk.-Basalt
|
K/Ar
|
gms
|
0.65
|
0.06
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
A 27
|
Acatlán, Jal.
|
-103.58
|
20.41
|
Alk.-Andesite
|
K/Ar
|
WR
|
0.65
|
0.22
|
Allan 1986
|
|
|
|
|
|
|
|
|
MAS-326
|
C. El Rosario (Amat. Canas)
|
-104.49
|
20.91
|
Alk.-Basalt
|
K/Ar
|
gms
|
0.64
|
0.10
|
Righter & Carmichael, 1992
|
|
|
|
|
|
|
|
|
624
|
S. Martin, Jal.
|
-103.83
|
20.91
|
Dacite
|
K/Ar
|
WR
|
0.63
|
0.03
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
Ar 06
|
C. Lobos, Jal.
|
|
|
Andesite
|
K/Ar
|
gms
|
0.61
|
0.10
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
AZ 130
|
Cerro La Calabaza, Mich.
|
-100.59
|
19.87
|
Andesite
|
K/Ar
|
WR
|
0.60
|
0.05
|
Pradal and Robin, 1994
|
|
|
|
|
|
|
|
|
LG 10
|
Iztaccihuatl
|
-98.73
|
19.16
|
Dacite
|
K/Ar
|
WR
|
0.58
|
0.12
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
R 12
|
Iztaccihuatl
|
-98.66
|
19.15
|
Andesite
|
K/Ar
|
Pl
|
0.58
|
0.11
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
HKA 929
|
|
-102.64
|
19.10
|
Basalt
|
K/Ar
|
WR
|
0.58
|
0.09
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
Hz 37
|
Zitacuaro area, Mich.
|
-100.25
|
19.38
|
Dacite
|
K/Ar
|
gms
|
0.58
|
0.10
|
CFE, 1992b
|
|
|
|
|
|
|
|
|
B 31
|
S Sayula, Colima graben
|
-103.61
|
19.81
|
Alk.-Andesite
|
K/Ar
|
WR
|
0.58
|
0.04
|
Allan 1986
|
|
|
|
|
|
|
|
|
NT 10
|
Cerro Quinceo, Mich.
|
|
|
Basalt
|
Ar/Ar
|
gms
|
0.57
|
0.12
|
Suter, Lopez, Quintero, unpublished
|
|
|
|
|
|
|
|
|
*
|
Xaltipan, Los Hum.
|
-97.50
|
19.58
|
Ignimbrite
|
K/Ar
|
|
0.56
|
0.20
|
Yanez-G. and Garcia-D. 1980
|
|
|
|
|
|
|
|
|
HKA 974
|
|
-101.55
|
19.63
|
|
K/Ar
|
|
0.56
|
0.07
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
*
|
Volcan Tequila, Jal.
|
-103.86
|
20.90
|
Obsidian
|
K/Ar
|
An
|
0.55
|
0.04
|
Harris, 1985
|
|
|
|
|
|
|
|
|
HKA 1023
|
|
-102.25
|
19.36
|
|
K/Ar
|
|
0.55
|
0.06
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
Mex 232
|
Capula, Mich.
|
-101.30
|
19.68
|
Andesite
|
K/Ar
|
WR
|
0.54
|
0.20
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
974
|
Cerro Yahuarato, Mich.
|
-101.52
|
19.60
|
Andesite
|
K/Ar
|
gms
|
0.54
|
0.07
|
Ban et al., 1992
|
|
|
|
|
|
|
|
|
929
|
Cerro Buenavista, Mich.
|
-102.60
|
19.15
|
Andesite
|
K/Ar
|
gms
|
0.54
|
0.08
|
Ban et al., 1992
|
|
|
|
|
|
|
|
|
Co 119
|
Nevado Colima
|
-103.66
|
19.60
|
Andesite
|
K/Ar
|
WR
|
0.53
|
0.10
|
Robin et al. 1984
|
|
|
|
|
|
|
|
|
KA 2956
|
Achio, Guad.
|
-103.73
|
20.89
|
Basalt
|
K/Ar
|
|
0.53
|
0.10
|
Gilbert et al. 1985
|
|
|
|
|
|
|
|
|
Ar 01
|
Atarjea de Tesc., Nay.
|
|
|
Andesite
|
K/Ar
|
gms
|
0.53
|
0.16
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
1023
|
Cerro Tancitaro, Mich.
|
-102.40
|
19.27
|
Andesite
|
K/Ar
|
gms
|
0.53
|
0.06
|
Ban et al., 1992
|
|
|
|
|
|
|
|
|
-
|
Cerro Mozo, Mich.
|
-100.73
|
19.85
|
Dacite
|
K/Ar
|
WR
|
0.50
|
0.10
|
Pradal and Robin, 1994
|
|
|
|
|
|
|
|
|
95-U2a
|
Tlaxco Group, Pue.
|
-97.97
|
19.40
|
Andesite
|
K/Ar
|
WR
|
0.49
|
0.07
|
Carrasco-Nuñez et al., 1998
|
|
|
|
|
|
|
|
|
198
|
N of San Sebastian, Jal.
|
-104.84
|
20.88
|
Minette
|
K/Ar
|
WR
|
0.48
|
0.02
|
Lange & Carmichael, 1991
|
|
|
|
|
|
|
|
|
VE 21
|
E Cofre de Perote
|
-97.13
|
19.63
|
Alk.-andesite
|
K/Ar
|
WR
|
0.47
|
0.00
|
Cantagrel et al. 1979
|
|
|
|
|
|
|
|
|
TUX-72
|
C. S. Martin, Los Tuxtlas
|
-94.73
|
18.32
|
Alk.-Basalt
|
K/Ar
|
WR
|
0.45
|
0.07
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
95-J2
|
Xaltipan, Los Hum., Pue.
|
-97.78
|
19.61
|
Ignimbrite
|
K/Ar
|
WR
|
0.45
|
0.09
|
Carrasco-Nuñez et al., 1998
|
|
|
|
|
|
|
|
|
P 6
|
Iztaccihuatl
|
-98.63
|
19.13
|
Dacite
|
K/Ar
|
Pl
|
0.41
|
0.14
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
NT 25
|
Shomegé, Mich.
|
-99.89
|
19.83
|
Basalt
|
Ar/Ar
|
WR
|
0.40
|
0.10
|
Suter et al., 1995
|
|
|
|
|
|
|
|
|
Co 70
|
Nevado Colima
|
-103.66
|
19.61
|
Andesite
|
K/Ar
|
WR
|
0.37
|
0.05
|
Robin et al. 1984
|
|
|
|
|
|
|
|
|
LTX-37
|
San Rafael, Los Tuxtlas
|
-95.01
|
18.45
|
Alk.-Basalt
|
K/Ar
|
WR
|
0.37
|
0.02
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
L426
|
Cerro Pelón, Mich.
|
-101.90
|
19.28
|
Basalt
|
K/Ar
|
WR
|
0.37
|
0.50
|
Hasenaka and Carmichael 1985
|
|
|
|
|
|
|
|
|
SNC-1A
|
V. Ceboruco, Nay.
|
-104.50
|
21.11
|
Andesite
|
K/Ar
|
WR
|
0.37
|
0.20
|
Ferrari et al., 1997
|
|
|
|
|
|
|
|
|
455
|
S Maravatio, Mich.
|
-100.76
|
19.89
|
Rhyodacite
|
K/Ar
|
WR
|
0.36
|
0.08
|
Nixon et al., 1987
|
|
|
|
|
|
|
|
|
LTX-36
|
Los Morritos
|
-94.96
|
18.50
|
Alk.-Basalt
|
K/Ar
|
WR
|
0.35
|
0.20
|
Jacobo-Albarrán et al., 1982
|
|
|
|
|
|
|
|
|
Iz 1
|
Iztaccihuatl
|
-98.63
|
19.13
|
Dacite
|
K/Ar
|
Pl
|
0.34
|
0.04
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
141
|
San Felipe de Hijar, Jal.
|
-104.74
|
20.87
|
Minette
|
K/Ar
|
Phl
|
0.33
|
0.12
|
Lange & Carmichael, 1991
|
|
|
|
|
|
|
|
|
318
|
San Felipe de Hijar, Jal.
|
-104.76
|
20.87
|
Kersantite
|
K/Ar
|
gms
|
0.33
|
0.12
|
Lange & Carmichael, 1991
|
|
|
|
|
|
|
|
|
*
|
Cerro San Andres, Mich.
|
-100.61
|
19.81
|
Dacite
|
K/Ar
|
Pl
|
0.33
|
0.07
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
*
|
Derrumbadas, Pue.
|
-97.48
|
19.30
|
Dacite
|
K/Ar
|
|
0.32
|
0.10
|
Yanez-G. and Garcia-D. 1980
|
|
|
|
|
|
|
|
|
*
|
Mesa El Rosario, Mich.
|
-100.70
|
19.75
|
Rhyolite
|
K/Ar
|
Bio
|
0.30
|
0.07
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
SN-307
|
NE S.J. Mojarras, Nay.
|
|
|
Alk.Basalt
|
K/Ar
|
WR
|
0.29
|
0.03
|
Nelson, unpublished
|
|
|
|
|
|
|
|
|
Co 56
|
Nevado Colima
|
-103.50
|
19.58
|
Andesite
|
K/Ar
|
WR
|
0.29
|
0.08
|
Robin et al. 1984
|
|
|
|
|
|
|
|
|
IZ 620
|
La Joya, Iztaccihuatl
|
-98.64
|
19.12
|
Andesite
|
K/Ar
|
WR
|
0.27
|
0.02
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
Iz 254
|
Iztaccihuatl
|
-98.63
|
19.11
|
Dacite
|
K/Ar
|
WR
|
0.27
|
0.00
|
Nixon, 1989
|
|
|
|
|
|
|
|
|
N 3
|
Los Negritos, Mich.
|
-102.63
|
20.07
|
Andesite
|
K/Ar
|
WR
|
0.24
|
0.02
|
Rosas et al., 1989
|
|
|
|
|
|
|
|
|
506
|
Volcan Tequila, Jal.
|
-103.83
|
20.80
|
Andesite
|
K/Ar
|
WR
|
0.22
|
0.03
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
0.22
|
0.02
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
*
|
Volcan Tequila, Jal.
|
-103.83
|
20.78
|
Andesite
|
K/Ar
|
WR
|
0.21
|
0.01
|
Harris, 1985
|
|
|
|
|
|
|
|
|
SN-191S
|
S Luis de Lozada, Nay.
|
|
|
Rhyolite
|
K/Ar
|
San
|
0.20
|
0.10
|
Nelson, unpublished
|
|
|
|
|
|
|
|
|
HKA 988
|
|
-101.98
|
19.83
|
|
K/Ar
|
|
0.18
|
0.03
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
988
|
W of Cerro el Picacho, Mich.
|
-101.97
|
19.84
|
Andesite
|
K/Ar
|
gms
|
0.17
|
0.03
|
Ban et al., 1992
|
|
|
|
|
|
|
|
|
XX
|
S.La Primavera, Jal.
|
-103.58
|
20.66
|
Rhyolite
|
K/Ar
|
|
0.15
|
0.02
|
Mahood and Drake 1982
|
|
|
|
|
|
|
|
|
*
|
S of Los Azufres, Mich.
|
-100.70
|
19.78
|
Rhyolite
|
K/Ar
|
Bio
|
0.15
|
0.05
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
Co 45
|
Nevado Colima, Col.
|
-103.58
|
19.58
|
Andesite
|
K/Ar
|
WR
|
0.14
|
0.04
|
Robin et al. 1984
|
|
|
|
|
|
|
|
|
*
|
Mesa El Carpintero, Mich.
|
-100.71
|
19.80
|
Rhyolite
|
K/Ar
|
glass
|
0.14
|
0.02
|
Dobson & Mahood, 1985
|
|
|
|
|
|
|
|
|
|
C. Los Ocotes, Nay.
|
|
|
Rhyolite
|
K/Ar
|
glass
|
0.10
|
0.01
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
Co 113
|
Volcan Colima
|
-103.43
|
19.51
|
Pyroclast
|
K/Ar
|
WR
|
0.08
|
0.03
|
Robin et al. 1984
|
|
|
|
|
|
|
|
|
Iz 254
|
Iztaccihuatl
|
-98.61
|
19.18
|
Dacite
|
K/Ar
|
WR
|
0.08
|
0.02
|
Nixon et al. 1987
|
|
|
|
|
|
|
|
|
KR 326
|
Zacualpan, Nay.
|
-105.06
|
21.24
|
Andesite
|
Ar/Ar
|
gms
|
0.07
|
0.05
|
Righter et al., 1995
|
|
|
|
|
|
|
|
|
909
|
Cerro Paracho, Mich.
|
-102.03
|
19.59
|
Andesite
|
K/Ar
|
gms
|
0.06
|
0.01
|
Ban et al., 1992
|
|
|
|
|
|
|
|
|
Mex230
|
W Cerro Quinceo, Mich.
|
-101.38
|
19.73
|
Bas.- Andesite
|
K/Ar
|
WR
|
0.05
|
0.00
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
*452
|
SE Tuxpan, Maravatio
|
-100.38
|
19.53
|
Rhyodacite
|
K/Ar
|
WR
|
0.05
|
0.03
|
Nixon et al., 1987
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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