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China Becomes First Country to Lift ‘Combustible Ice’ From Ocean Floor

Sputnik – 18.05.2017

China has managed to successfully mine combustible ice in the South China Sea after nearly two decades of research and exploration.

The trial mining site is situated in the Shenhu area of the South China Sea. It is a major breakthrough that may lead to a global energy revolution, according to China’s Minister of Land and Resources Jiang Daming.

In a statement published on China’s government website it said that the natural gas hydrate is the best replacement for oil and natural gas.

Combustible ice usually exists in seabeds or tundra areas, which have the strong pressure and low temperature necessary to keep it stable. It can be ignited like solid ethanol, which is why it is called “combustible ice.”

China first discovered combustible ice, a kind of natural gas hydrate that can be lit on fire and burned as fuel, in the South China Sea back in 2007.

CCTV channel, reported that samples of combustible ice were lifted from a depth of 1,266 meters in the South China Sea region, 285 kilometers from Hong Kong.

Since May 10, the Chinese oil industry has produced 120,000 cubic meters of combustible ice which contains 99.5% of methane.

Experts believe that the extraction shows China has mastered combustible ice mining technology.

“Many countries along the Maritime Silk Road have a demand for combustible ice mining,” Qiu Haijun, director of the trial mining commanding headquarters said, Shanghai Daily reported.

“With the advanced technology we could help resolve the energy resource problem and boost economic development and exchanges between countries,” Qiu said.

May 18, 2017 Posted by | Economics, Timeless or most popular | , | 2 Comments

Abiotic methane discovered under the Arctic Ocean

Center for Arctic Gas Hydrate, Climate and Environment (CAGE)

New source of methane discovered in the Arctic Ocean

Methane, a highly effective greenhouse gas, is usually produced by decomposition of organic material, a complex process involving bacteria and microbes.

But there is another type of methane that can appear under specific circumstances: Abiotic methane is formed by chemical reactions in the oceanic crust beneath the seafloor.

New findings show that deep water gas hydrates, icy substances in the sediments that trap huge amounts of the methane, can be a reservoir for abiotic methane. One such reservoir was recently discovered on the ultraslow spreading Knipovich ridge, in the deep Fram Strait of the Arctic Ocean. The study suggests that abiotic methane could supply vast systems of methane hydrate throughout the Arctic.

The study was conducted by scientists at Centre for Arctic Gas Hydrate, Environment and Climate (CAGE) at UiT The Arctic Univeristy of Norway. The results were recently published in Geology online and will be featured in the journal’s May issue.

Previously undescribed

“Current geophysical data from the flank of this ultraslow spreading ridge shows that the Arctic environment is ideal for this type of methane production. ” says Joel Johnson associate professor at the University of New Hampshire (USA), lead author, and visiting scholar at CAGE.

This is a previously undescribed process of hydrate formation; most of the known methane hydrates in the world are fueled by methane from the decomposition of organic matter.

“It is estimated that up to 15 000 gigatonnes of carbon may be stored in the form of hydrates in the ocean floor, but this estimate is not accounting for abiotic methane. So there is probably much more.” says co-author and CAGE director Jürgen Mienert.

Life on Mars?

NASA has recently discovered traces of methane on the surface of Mars, which led to speculations that there once was life on our neighboring planet. But an abiotic origin cannot be ruled out yet.

On Earth it forms through a process called serpentinization.

“Serpentinization occurs when seawater reacts with hot mantle rocks exhumed along large faults within the seafloor. These only form in slow to ultraslow spreading seafloor crust. The optimal temperature range for serpentinization of ocean crust is 200 – 350 degrees Celsius.” says Johnson.

Methane produced by serpentinization can escape through cracks and faults, and end up at the ocean floor. But in the Knipovich Ridge it is trapped as gas hydrate in the sediments. How is it possible that relatively warm gas becomes this icy substance?

“In other known settings the abiotic methane escapes into the ocean, where it potentially influences ocean chemistry. But if the pressure is high enough, and the subseafloor temperature is cold enough, the gas gets trapped in a hydrate structure below the sea floor. This is the case at Knipovich Ridge, where sediments cap the ocean crust at water depths up to 2000 meters. ” says Johnson.

Stable for two million years

Another peculiarity about this ridge is that because it is so slowly spreading, it is covered in sediments deposited by fast moving ocean currents of the Fram Strait. The sediments contain the hydrate reservoir, and have been doing so for about 2 million years.

“This is a relatively young ocean ridge, close to the continental margin. It is covered with sediments that were deposited in a geologically speaking short time period -during the last two to three million years. These sediments help keep the methane trapped in the sea floor.” says Stefan Bünz of CAGE, also a co-author on the paper.

Bünz says that there are many places in the Arctic Ocean with a similar tectonic setting as the Knipovich ridge, suggesting that similar gas hydrate systems may be trapping this type of methane along the more than 1000 km long Gakkel Ridge of the central Arctic Ocean.

The Geology paper states that such active tectonic environments may not only provide an additional source of methane for gas hydrate, but serve as a newly identified and stable tectonic setting for the long-term storage of methane carbon in deep-marine sediments.

Need to drill

The reservoir was identified using CAGE’s high resolution 3D seismic technology aboard research ressel Helmer Hanssen. Now the authors of the paper wish to sample the hydrates 140 meters below the ocean floor, and decipher their gas composition.

Knipovich Ridge is the most promising location on the planet where such samples can be taken, and one of the two locations where sampling of gas hydrates from abiotic methane is possible.

“We think that the processes that created this abiotic methane have been very active in the past. It is however not a very active site for methane release today. But hydrates under the sediment, enable us to take a closer look at the creation of abiotic methane through the gas composition of previously formed hydrate.” says Jürgen Mienert who is exploring possibilities for a drilling campaign along ultra-slow spreading Arctic ridges in the future.

April 14, 2015 Posted by | Malthusian Ideology, Phony Scarcity, Science and Pseudo-Science | , | 1 Comment