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Hundreds of Years of CO2 Emissions Could Be Stored Forever in Oman's Rocks



(p. A10) IBRA, Oman -- In the arid vastness of this corner of the Arabian Peninsula, out where goats and the occasional camel roam, rocks form the backdrop practically every way you look.

But the stark outcrops and craggy ridges are more than just scenery. Some of these rocks are hard at work, naturally reacting with carbon dioxide from the atmosphere and turning it into stone.

Veins of white carbonate minerals run through slabs of dark rock like fat marbling a steak. Carbonate surrounds pebbles and cobbles, turning ordinary gravel into natural mosaics.

Even pooled spring water that has bubbled up through the rocks reacts with CO2 to produce an ice-like crust of carbonate that, if broken, re-forms within days.

Scientists say that if this natural process, called carbon mineralization, could be harnessed, accelerated and applied inexpensively on a huge scale -- admittedly some very big "ifs" -- it could help fight climate change. Rocks could remove some of the billions of tons of heat-trapping carbon dioxide that humans have pumped into the air since the beginning of the Industrial Age.

And by turning that CO2 into stone, the rocks in Oman -- or in a number of other places around the world that have similar geological formations -- would ensure that the gas stayed out of the atmosphere forever.

"Solid carbonate minerals aren't going anyplace," said Peter B. Kelemen, a geologist at Columbia University's Lamont-Doherty Earth Observatory who has been studying the rocks here for more than two decades.

Capturing and storing carbon dioxide is drawing increased interest. The Intergovernmental Panel on Climate Change says that deploying such technology is essential to efforts to rein in global warming.


. . .


The rocks are so extensive, Dr. Kelemen said, that if it was somehow possible to fully use them they could store hundreds of years of CO2 emissions. More realistically, he said, Oman could store at least a billion tons of CO2 annually. (Current yearly worldwide emissions are close to 40 billion tons.)



For the full story, see:


Henry Fountain. "How Oman's Rocks Could Help Save the Planet." The New York Times (Saturday, APRIL 28, 2018: A10-A11.

(Note: ellipsis added.)

(Note: the online version of the story has the date APRIL 26, 2018.)






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