Page 35 - Geothermal Energy Systems Exploration, Development, and Utilization

1.1 Expressions of Earth’s Heat Sources 11

250 MOHO = 40 Km a dip
T (°C) 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 225 (PPR 0.97) 600° 800° 1000° 1200° 1000° 500 550 600 300 km 1450 C in slab and color
200 resulting where Parmentier, the
175 800° 1000° 1200° 1400° (d) SE Costa rica event zones, on figure
Subduction 150 125 Popocatepetl 150° 250° 450° 100 150 200 250 300 350 400 450 Distance from the trench (km) 0 0 300 km thrusting subduction Cagnioncle, this of

75 100 180 km (large interplate earthquakes) Transition zone (slow earthquakes) (a) version
50 81 km 32 km 81 km Seismogenic zone around bottom,
Coast 180 km color
25 32 km 600° 800° 1000° 1200° 1400° 50 (c) Central costa rica perturbations: to
Trench 81 km 0 fields top a
0 25 50 75 100 125 150 175 200 0 0 −50 −100 −150 −200 −250 0 −300 km 0 from find
(b) thermal thermal of (After, (Please
Depth (km)
Depth (km)

T max = 500 °C 428 °C 424 °C 446 °C 530 °C 750 °C steady-state and models distinct other. the to 2005.) al., et

transient (b) and case one Peacock 2004;
Thrusting event large-scale crust from differ al., et

of radiogenic velocities Manea
Examples more 2007;

and plate
1.6
t 0 + 1 Ma t 0 + 2.5 Ma t 0 + 5 Ma t 0 + 10 Ma t 0 + 30 Ma 30 km Figure thickened and Elkins-Tanton, plates.)
t 0 (a) angle