Transcript Gas Hydrate - McGill University

Gas Hydrate:
Burning Ice
Bruno Tremblay
McGill University
[email protected]
Paleocene Eocene Thermal
Maximum
PETM
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The warming phase lasted 20,000 years. The
recovery phase lasted around 30 to 170,000
years.
1000-1500 GT of Carbon released in the
atmosphere in 2000 years – slightly lower than
today’s emissions.
Large negative excursion of delta C13. Methane
is very rich in C12 (negative delta C13)
How do we know the source of
Carbon in the atmosphere?
Delta C13
Burning Ice
Methane Hydrate
Formation and Stability
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Rapid accumulation of organic detritus and
rapid accumulation of sediment (to protect the
detritus from oxydation.
Bacteria produces metane from organic detritus
Gas forms within the sediment and rise until
they are no longer stable in gas phase (trn into
ice).
This is in turn forms a cap preventing methane
from escaping.
Stability Curve
Gas hydrate Reservoir
Confirmed and Inferred Gas
hydrate Sites
Gas Hydrate Extraction
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Add heat to the gas hydrate to melt and extract
the gaseous methane
Pumping into the free gas below the stability
curve.
Add anti-freeze such as methanol
Replace the methane in the hydrate with CO2!
http://gsc.nrcan.gc.ca/gashydrates/canada/index_e.php