Magma Gas Flashcards
1
Q
What comprises Magma gas?
A
H2O (70-90%), CO2 (Hawaii since no H2O), SO2
2
Q
How is Magma Gas Measured
A
Direct Measurements, Remote Sensing (COSPEC (Correlated Infrared Spectrometer) TOMS (Total Ozone Mapping Spectrometer))
3
Q
Different Magma have Different _____ of volcanic gas
A
Carrying Capacity
4
Q
3 Stages of Gas Behavior
A
- Gas starts to dissolve
- Vesiculation
- Fragmentation
5
Q
Vesiculation
A
Exsollution of Gas by cooling, depressurization, and crystallization
6
Q
Relationship between Pressure and Gas Bubbles
A
Inverse
7
Q
Fragmentation of Magma
A
Magma freezes and breaks apart (Ash!) during explosive eruption
8
Q
What triggered Eruptions (bubble flow)?
A
- Rapid unloading of volcano’s edifice
- Intrusion of new, hotter magma which delivers more dissolved gas (mixing of different magmas)
9
Q
Eruptive Characteristics reflect . . .
A
Temperature, viscosity, rate and style of degassing
