|
|
|
|
|
|
LTX-78
|
C. San Martin, Tuxtlas
|
-94.79
|
18.27
|
Alk.-Basalt
|
K/Ar
|
WR
|
5.90
|
2.90
|
Jacobo-Albarrán et al., 1992
|
|
|
|
|
|
|
|
|
Az 7
|
Los Azufres (Mix), Mich.
|
-100.68
|
19.75
|
Andesite
|
K/Ar
|
WR
|
5.90
|
0.40
|
Aumento and Negrin 1980
|
|
|
|
|
|
|
|
|
AG 69
|
Apaseo el Alto, Gto.
|
|
|
Rhyolite (obs.)
|
K/Ar
|
gms
|
6.70
|
0.20
|
Aguirre and Lopez, unpublished
|
|
|
|
|
|
|
|
|
Am 67
|
N Amealco caldera, Qro.
|
-100.10
|
20.35
|
Basaltic Andes.
|
K/Ar
|
WR
|
5.69
|
0.35
|
Aguirre, 1997
|
|
|
|
|
|
|
|
|
LIRT 200
|
Chiconquiaco-Palma Sola, Ver.
|
-96.86
|
19.79
|
Basaltic-andesite
|
K/Ar
|
WR
|
5.60
|
0.90
|
Lopez-Infanzon, 1990
|
|
|
|
|
|
|
|
|
Jal 7
|
N Presa S. Rosa, Jal.
|
-103.67
|
20.93
|
Ignimbrite
|
K/Ar
|
|
5.53
|
0.10
|
Nieto-Obregón et al. 1985
|
|
|
|
|
|
|
|
|
5
|
Rio G. Santiago, Jal.
|
-103.50
|
20.80
|
Andesite
|
K/Ar
|
WR
|
5.50
|
0.10
|
Watkins et al. 1971
|
|
|
|
|
|
|
|
|
AG 56
|
La Joya, S. Los Agustinos, Gto.
|
|
|
Andesite
|
K/Ar
|
WR
|
5.50
|
0.40
|
Aguirre and Lopez, unpublished
|
|
|
|
|
|
|
|
|
KA 4290
|
La Soledad, Jal.
|
-103.30
|
20.82
|
Rhyolite
|
K/Ar
|
|
5.47
|
0.17
|
Gilbert et al. 1985
|
|
|
|
|
|
|
|
|
CHP 552
|
Teocuitatlan, Jal.
|
-103.37
|
20.11
|
Andesite
|
K/Ar
|
|
5.45
|
0.85
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
Mx 88-43
|
Puroagua, Siete Cruces, Mich.
|
-100.44
|
20.09
|
Rhyolite
|
K/Ar
|
San
|
5.40
|
0.50
|
Ferrari et al. 1991
|
|
|
|
|
|
|
|
|
C 85
|
E Sayula L., Jal.
|
-103.58
|
20.08
|
Andesite
|
K/Ar
|
Hb
|
5.40
|
0.20
|
Allan 1986
|
|
|
|
|
|
|
|
|
OB 3
|
Espinazo del Diablo, Jal.
|
|
|
Rhyolite
|
FT
|
Obs
|
5.36
|
0.21
|
Ferrari et al., in prep.
|
|
|
|
|
|
|
|
|
Aca 2
|
El Zapote, Mich.
|
-100.93
|
19.98
|
Andesite
|
K/Ar
|
WR
|
5.32
|
0.50
|
Pasquarè et al., 1991
|
|
|
|
|
|
|
|
|
ZHG JRE-5
|
Sierra de Tapalpa, Jal.
|
-103.67
|
20.25
|
Andesite
|
K/Ar
|
WR
|
5.30
|
0.30
|
Rosas et al., 1997
|
|
|
|
|
|
|
|
|
CHP 726b
|
Cerro La Caja, Jal.
|
-102.86
|
20.06
|
Andesite
|
K/Ar
|
|
5.23
|
0.63
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
C 78
|
Zacoalco, Guad.
|
-103.55
|
20.20
|
Andesite
|
K/Ar
|
Hb
|
5.20
|
0.40
|
Allan 1986
|
|
|
|
|
|
|
|
|
KA 3252
|
N S. Francisco Tesitan, Gua.
|
-103.38
|
20.78
|
Rhyolite
|
K/Ar
|
|
5.19
|
0.06
|
Gilbert et al. 1985
|
|
|
|
|
|
|
|
|
CHP 113
|
Las Presitas, Jal.
|
-103.56
|
20.20
|
Andesite
|
K/Ar
|
WR
|
5.17
|
0.82
|
Delgado et al., 1995
|
|
|
|
|
|
|
|
|
EN 55
|
SE Apaseo, Gto.
|
-100.63
|
20.40
|
Basalt
|
K/Ar
|
WR
|
5.15
|
1.00
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
CHP 533
|
W Cajititlan lake, Jal.
|
-103.43
|
20.42
|
Andesite
|
K/Ar
|
|
5.15
|
0.61
|
Delgado G. H., 1992
|
|
|
|
|
|
|
|
|
AG 82
|
Sierra Los Agostinos, Gto.
|
|
|
Basalt
|
K/Ar
|
WR
|
5.10
|
0.30
|
Aguirre and Lopez, unpublished
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
5.00
|
0.40
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
5.00
|
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
|
|
|
|
Basalt
|
K/Ar
|
WR
|
5.00
|
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
*
|
Teziutlan, Pue.
|
-97.20
|
19.73
|
Andesite
|
K/Ar
|
|
5.00
|
0.00
|
Yanez-G. and Garcia-D. 1980
|
|
|
|
|
|
|
|
|
|
|
|
|
Andesite
|
K/Ar
|
WR
|
5.00
|
|
IMP, UNPUBLISHED
|
|
|
|
|
|
|
|
|
Az 6
|
Los Azufres (-700), Mich.
|
-100.66
|
19.76
|
Andesite
|
K/Ar
|
WR
|
5.00
|
0.40
|
Aumento and Negrin 1980
|
|
|
|
|
|
|
|
|
Joy 78
|
Volcán La Joya, Gto.
|
|
|
Basalt
|
Ar/Ar
|
WR
|
6.20§
|
0.60
|
Aguirre et al., in prep.
|
|
|
|
|
|
|
|
|
EN 69
|
Sierra Los Agostinos, Gto.
|
-100.76
|
20.25
|
Basalt
|
K/Ar
|
WR
|
4.99
|
1.50
|
Jacobo-Albarrán, 1986
|
|
|
|
|
|
|
|
|
Al 20
|
Atoyac, Jal.
|
-103.53
|
20.00
|
Andesite
|
K/Ar
|
WR
|
4.96
|
0.03
|
Allan 1986
|
|
|
|
|
|
|
|
|
Mas-512
|
La Coronilla, Jal.
|
-103.22
|
20.67
|
Bas.-Andesite
|
K/Ar
|
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