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Christine Gammans Joel Pierson. Mountain Building. Active Orogenic Belts. Equations. Results. Andes 1.298 x 10 17 J/year 5.562 x 10 16 J/year St. Elias Mountains 1.682 x 10 16 J/year 7.209 x 10 15 J/year. Himalayas 7.509 x 10 17 J/year 2.503 x 10 17 J/year - PowerPoint PPT Presentation
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MOUNTAIN BUILDING
Christine GammansJoel Pierson
ACTIVE OROGENIC BELTSHeight Length Base Uplift per
yearAndes 4000 m 7000
km500 km 0.3-0.7 mm
St. Elias Mountains
2700 m 480 km 140 km 3.0-7.0 mm
Himalayas 5250 m 2400 km
300 km 5.0-15.0 mm
Papua New Guinea
2500 m 250 km 70 km 0.8-2.1 mm
EQUATIONS
vm
heightlengthbaseV 21
yearmuplift
smgkgm
yearPEPower 2
32700mkg
281.9smg
RESULTS Andes1.298 x 1017 J/year 5.562 x 1016 J/year
St. Elias Mountains1.682 x 1016 J/year 7.209 x 1015 J/year
Himalayas7.509 x 1017 J/year 2.503 x 1017 J/year
Papua New Guinea1.217 x 1015 J/year 6.352 x 1014 J/year
CONCLUSIONS
Some energy is lost as thermal energy to processes such as metamorphism and frictional heating
One paper suggested up to 85 % was lost If so, total max energy would be
5.988 x 1018 J/year Total min energy:
2.098 x 1018 J/year
Total Maximum Energy: 8.982 x 1017 J/year
Total Minimum Energy: 3.138 x 1017 J/year
