Geoscience Reference
In-Depth Information
a.
Upper Crust
Lower Crust
M
Mantle
b.
Upper Crust
Lower Crust
Mantle
100 Ma
Efective Compressional Strain
0
0.2
0.4
0.6
0.8
1
c.
5
3
2
4
1
Figure 11.3 (a) The model set-up. A thermal anomaly is imposed at the base of the crust in the
middle of the model. The stippled pattern shows sediments, and the arrows show mass flux. (b)
Compressional strain-rate distribution after 100 Ma. The reactivation of weak rifted structures by
stress inversion results in isolated locations of elevated strain rates (darker patterns). (c) Schematic
figure showing interpreted locations of LSCs within the rift (this study). The regions of modeled high
strain rates (darker pattern in (b)) were compared with locations of faults and rift pillows in the Kutch
and Sea of Japan rift basins to infer the location of a rift pillow (1), border and interior conjugate
faults (2 and 3). A through-going fault into the lower crust (4) is based on the model by Iio
et al
.
