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#255928 - 02/04/08 04:25 AM Incubator of life?
Elena Moderator Offline
Sci/Tech Moderator

Registered: 07/10/05
Loc: Moscow, Russia
Discovery of Lost City in 2000 proved that hydrocarbons can be generated abiogenetically.

 Quote:
Hydrocarbons -- molecules critical to life -- are being generated by the simple interaction of seawater with the rocks under the Lost City hydrothermal vent field in the mid-Atlantic Ocean.

Being able to produce building blocks of life makes Lost City-like vents even stronger contenders as places where life might have originated on Earth, according to Giora Proskurowski and Deborah Kelley, two authors of a paper in the Feb. 1 Science. Researchers have ruled out carbon from the biosphere as a component of the hydrocarbons in Lost City vent fluids.


 Quote:
The hydrocarbons being produced at Lost City are not formed from atmospheric carbon dioxide dissolved in seawater because none of the carbon carries the radioisotopic signature that would be present if they had been exposed to sunlight, Proskurowski says.

Analysis of rock from Lost City shows that the hydrocarbons are not coming from the living biosphere. Rock in contact with seawater has a very consistent ratio of carbon dioxide to helium. But the rock at Lost City had a strikingly different ratio. It turns out that the depleted amount of carbon dioxide in the rocks roughly equals the amount of hydrocarbons being produced in the fluids, he says.


.http://uwnews.washington.edu/ni/article.asp?articleID=39478

Can such structures be "incubators of life" on early Earth or other planets?
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#256105 - 02/05/08 12:25 AM Re: Incubator of life? [Re: Elena]
WakeHolden Offline
over-experienced member

Registered: 04/12/05
Loc: Trust no one but me
So we all came from eels that lived near these vents then, Elena?

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#256119 - 02/05/08 02:03 AM Re: Incubator of life? [Re: WakeHolden]
Cy_Click Offline

Can you hear me now?

Registered: 08/08/06
Loc: Minneapolis,MN
You never noticed?
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"Taking my medication makes me more like I'm supposed to be." - Young girl.

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#256122 - 02/05/08 02:45 AM Re: Incubator of life? [Re: WakeHolden]
Elena Moderator Offline
Sci/Tech Moderator

Registered: 07/10/05
Loc: Moscow, Russia
No. The Lost City appeared only 10000 years ago. \:\) As for me, this phenomenon just proves Mendeleev’s Theory of abiogenetic origin of oil and natural gas. Hirality in deposits can be caused by microorganisms.
I know that question of life origin is something like invention of perpetuum mobile, but…
Creationism, panspermia or abiogenetics? Do we have something else to choose?
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#256193 - 02/05/08 06:00 PM Re: Incubator of life? [Re: Elena]
Lawmage Online
member

Registered: 07/03/03
Loc: varies from day to day
We just might, Elena.

This month's issue of Discover Magazine has a very interesting article about the possible origins of life. Interestingly enough, it argues for life orginating in the frozen ice that once covered the Earth. It appears that contrary to conventional wisdom the nucleobases necessary to form RNA are more easily formed in ice than they are in the warm primordial soup envisioned by so many at the dawn of life.

Research by Christof Biebricher at Max Planck Institute has yielded spontaneously assembled RNA strands involving as many as 700 base pairs by freezing the nucleobases in normal sea water. The previous best chains were the result of work by Leslie Orgel at the Salk Institute. They measured 40 base pairs...Orgel was recreating the conventional wisdom's setting...that warm primordial soup. Biebricher was, as stated, working in the cold.

It is starting to look, to me at least, that life is an almost inevitable result of chemistry. That life is going to appear all over the universe once we get out and start looking for it. More than that, and more on topic, it is starting to appear that life is going to appear on Earth...everywhere we look at it.

I am interested in something about Elena's opening post. What sorts of hydrocardons are we talking about here? There is an enormous difference between petroleum and the most basic hydrocrabons, like those produced abioticly. I think it is premature to point to these hydrocarbons and suggest petroleum has an abiotic origin as Mendeleev suggests.
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#256356 - 02/07/08 02:08 AM Re: Incubator of life? [Re: Lawmage]
Elena Moderator Offline
Sci/Tech Moderator

Registered: 07/10/05
Loc: Moscow, Russia
 Quote:
What sorts of hydrocardons are we talking about here? There is an enormous difference between petroleum and the most basic hydrocrabons, like those produced abioticly.


Natural gas contains 95-97% of methane. Nobody doubts that methane has both biogenic and abiogenic origin. In this case methane and simple saturated hydrocarbons are produced due to serpentinization. Don’t forget that in this case we don’t have rocks to collect these hydrocarbons. Btw, Mendeleev got unsaturated hydrocarbons due to reaction of sulfuric acid and cast iron with high carbon ratio in his laboratory. At any rate we can find oil not only in sedimentary, but in crystalloid rocks as well. On the depth of 5-6 kilometers. There is oil everywhere; the different is only its ratio in the rocks. Existing theory of oil origin doesn’t explain a great many of facts. Thus geologists can find oil in such places, where it just can’t be. Btw, the age of many deposits doest suit biogenic theory. It have to be tens and hundreds of millions years, but we find only tens of thousands of years. Creationists consider it as an evidence of their rightness. In common, geologists are searching oil in fault zones, whatever theory they support.
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#257738 - 02/16/08 01:32 AM Re: Incubator of life? [Re: Elena]
Elena Moderator Offline
Sci/Tech Moderator

Registered: 07/10/05
Loc: Moscow, Russia
This is the areticle "Titan has more oil than Earth".

 Quote:
Saturn's smoggy moon Titan has hundreds of times more natural gas and other liquid hydrocarbons than all the known oil and natural gas reserves on Earth, scientists said today.

The hydrocarbons rain from the sky on the miserable moon, collecting in vast deposits that form lakes and dunes. This much was known. But now the stuff has been quantified using observations from NASA's Cassini spacecraft.

"Titan is just covered in carbon-bearing material — it's a giant factory of organic chemicals," said Ralph Lorenz, a Cassini radar team member from the Johns Hopkins University Applied Physics Laboratory. "This vast carbon inventory is an important window into the geology and climate history of Titan."

At minus 179 degrees Celsius (minus 290 degrees Fahrenheit), Titan would be an awful place to live. Instead of water, liquid hydrocarbons in the form of methane and ethane are present on the moon's surface, and tholins probably make up its dunes. The term "tholins" was coined by Carl Sagan in 1979 to describe the complex organic molecules at the heart of prebiotic chemistry.


.http://www.space.com/scienceastronomy/080213-titan-oil.html
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#258152 - 02/18/08 01:18 AM Re: Incubator of life? [Re: Elena]
Bad Bird Offline
experienced member

Registered: 02/17/08
Loc: WA, USA
"Titan is just covered in carbon-bearing material — it's a giant factory of organic chemicals," said Ralph Lorenz, a Cassini radar team member from the Johns Hopkins University Applied Physics Laboratory. "This vast carbon inventory is an important window into the geology and climate history of Titan."

Indeed, and it is also indicative of the amount of carbon-based chemicals in the universe.

When I was in school (some years ago) it was accepted that hydro-carbons were peculiar to Earth and did not exist in space. I think the first indications that they might be more widespread was when they first did spectroscopic analysis of comets from outside the Earth's atmosphere. Now we know that they are ubiquitous, even in "empty" space.

Bad Bird

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