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Carbon Dioxide Has Been Naturally Stored For A Million Years In Colorado And Rocky Mountains

Date:
February 23, 2008
Source:
University of Manchester
Summary:
Earth scientists have found that carbon dioxide has been naturally stored for more than a million years in several gas fields in the Colorado Plateau and Rocky Mountains of the United States. Researchers say lessons learned from these natural gas fields will help to find sites suitable for injecting carbon dioxide captured from power station chimneys.

Earth scientists at The University of Manchester have found that carbon dioxide has been naturally stored for more than a million years in several gas fields in the Colorado Plateau and Rocky Mountains of the United States.

Researchers say lessons learned from these natural gas fields will help to find sites suitable for injecting CO2 captured from power station chimneys.

Academics have been investigating five natural CO2 gas fields from the southwest United States, as they are examples of natural CO2 storage.

Their findings are published in the latest issue of the Geochemistry Journal Geochimica et Cosmochimica Acta.

In order for CO2 storage - also known as CO2 sequestration - to be considered as a viable method of reducing CO2 emissions to the atmosphere the public must be reassured that the CO2 pumped underground will be stored safely for a long time.

Dr Stuart Gilfillan, the University of Manchester researcher who led the project, said: "By measuring the noble gases within the Colorado carbon dioxide, we have been able to 'fingerprint' the CO2 for the first time. This has allowed us to show that the gas in all of the fields is the result of the degassing of molten magma within the Earth's crust.

"In all of these gas fields, the last known magma melting event was over eight thousand years ago. In three of the fields magma melting last occurred over a million years ago, and in one it was at least 40 million years ago.

"We already know that oil and gas have been stored safely in oil and gas fields over millions of years and this study clearly shows that the CO2 has been stored naturally and safely for a very long time in these fields.

"So, underground CO2 storage, in the correct place, should be a safe option to help us cope with emissions until we can develop cleaner energy sources."

The team hope that this study will pave the way for selection of similar safe sites for storage of CO2 captured in power plants in both the UK and abroad.

The paper, 'The noble gas geochemistry of natural CO2 gas reservoirs from the Colorado Plateau and Rocky Mountain provinces, USA', appears in Geochimica et Cosmochimica Acta, 15th February 2008, Vol 72, No. 4, p1174-1198. The research was funded by the Natural Environment Research Council (NERC).


Story Source:

The above story is based on materials provided by University of Manchester. Note: Materials may be edited for content and length.


Cite This Page:

University of Manchester. "Carbon Dioxide Has Been Naturally Stored For A Million Years In Colorado And Rocky Mountains." ScienceDaily. ScienceDaily, 23 February 2008. <www.sciencedaily.com/releases/2008/02/080217212303.htm>.
University of Manchester. (2008, February 23). Carbon Dioxide Has Been Naturally Stored For A Million Years In Colorado And Rocky Mountains. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2008/02/080217212303.htm
University of Manchester. "Carbon Dioxide Has Been Naturally Stored For A Million Years In Colorado And Rocky Mountains." ScienceDaily. www.sciencedaily.com/releases/2008/02/080217212303.htm (accessed October 23, 2014).

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