Resistivity Model for the Colima Volcanic Complex
Gravity (mGa)
Magnetics (nT)
Depth (km)
0
CVC
LO
SW
-100
-200
0
-20
-40
-60
-Observed -Calculated
=Observed =Calculated
-3
0
3
6
12
L4L3
L2
LI
D-2.55
D-2.45
D-2.6
D-2.36
D-2.75 -23
D=2.78
D=2.36
D-3.1
D-2.8
15
10
20
30
40
50
Distance (km)
Figure 6
NE
depth, km
Volcán
de Colima
debris
NW
TF
avalanche
deposits
Figure 7
SE
1.85
magma
shallow
conduit
magma
reservoir
-10-
Upper crust
1.8
-20-
silicic.
magma.
-30- Lower crust
-40-
mafic
magma
Mantle
-50-
Mantle
diapir
-60+
0
10
20
20
8-
30
40
50
50
60
-0
70
distance, km
-80
1.6
90
90
100
CC
Gravimetric and magnetic model from Alvarez &
Yutsis (2015) show several magmatic chambers
interconnected with dykes. Low magnetic and
gravimetric anomalies correlate with our profile DD'
anomaly. No resistivity model evidence stands for
the magma chambers south the CVC.
↑
BY
Our results support Sychev et al. (2019)
schematic model for the CVC magmatic system,
where a mafic magma intrudes and then evolves
to a more silisic magma during its ascend through
weakness planes.
6
1.75
1.7
1.65
Vp/Vs ratioView entire presentation