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Introduction
Volcanic Gases: Average Compositions and Minor or Trace Gases
Gas Compositions and Tectonic Setting
Gases: Man versus the Volcanoes
Volcanic Gases and the Origin of the Atmosphere
Global Impacts of Volcanic Eruptions
Some Important Eruptions
Deadly Gases
Dead Dinosaurs and Gas
Measuring Volcanic Gases
Quiz on Volcanic Gases
References on Volcanic Gases
Other Sources of Volcanic Gas Information

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Measuring Volcanic Gases


Volcanic gases from Kilauea are
analyzed using a mass spectrometer
at the Hawaiian Volcano Observatory



Gas geochemists collect data in several ways:

Estimates from Rocks, Minerals, and Inclusions
Direct Sampling
Remote Sensing