Discovery of granite suggests lunar oxygen

http://www.space-travel.com/reports/...i de_999.html

Most granites arose in the Proterozoic, following the
Great Oxidation Event ~2.4 billion years ago:
http://elements.geoscienceworld.org/...t/short/6/1/31
http://gsa.confex.com/gsa/2001AM/fin...ract_27205.htm
Therefore, silicic rocks such as granite and rhyolite imply
erstwhile occurrence of oxygen in the lunar atmosphere.
Dearth of impact craters in the vicinity suggests that the
volcanic eruptions, which formed the granites, occurred in
the later stages of planetary evolution, similar to Earth's.
John Curtis

Dear Brad Guth:

"Brad Guth" wrote in message ...
....
So exactly how old is our physically dark and highly
reactive (gamma charged) moon?

It is pretty clear that it has been separated from Earth more than 2.2
billion years, based on tidal rhythmites.

David A. Smith

On 31/07/2011 8:01 AM, John Curtis wrote:
http://www.space-travel.com/reports/...i de_999.html

Most granites arose in the Proterozoic, following the
Great Oxidation Event ~2.4 billion years ago:
http://elements.geoscienceworld.org/...t/short/6/1/31
http://gsa.confex.com/gsa/2001AM/fin...ract_27205.htm
Therefore, silicic rocks such as granite and rhyolite imply
erstwhile occurrence of oxygen in the lunar atmosphere.
Dearth of impact craters in the vicinity suggests that the
volcanic eruptions, which formed the granites, occurred in
the later stages of planetary evolution, similar to Earth's.
John Curtis

It seems the far side of the Moon has almost no thorium (other than a
small hotspot), whereas the near side is almost entirely covered by it.

What would the interpretation for such a hemispheric difference be?

Yousuf Khan

On 31/07/2011 8:01 AM, John Curtis wrote:
http://www.space-travel.com/reports/...i de_999.html

Most granites arose in the Proterozoic, following the
Great Oxidation Event ~2.4 billion years ago:
http://elements.geoscienceworld.org/...t/short/6/1/31
http://gsa.confex.com/gsa/2001AM/fin...ract_27205.htm
Therefore, silicic rocks such as granite and rhyolite imply
erstwhile occurrence of oxygen in the lunar atmosphere.
Dearth of impact craters in the vicinity suggests that the
volcanic eruptions, which formed the granites, occurred in
the later stages of planetary evolution, similar to Earth's.
John Curtis

It seems the far side of the Moon has almost no thorium (other than a
small hotspot), whereas the near side is almost entirely covered by it.

What would the interpretation for such a hemispheric difference be?

Yousuf Khan

The thorium on the far side exists as thorium silicate ThSiO4, whose
radiation
is diminished by dilution with the oxyanion SiO4, as result of oceanic
origin. Except for Compton-Belkovich anomaly, where thorium
exists as thorium oxide ThO2, as result of eruption into erstwhile
oxygenated atmosphere. Same situation as on Earth where basalt
(SiO4) shows less radiation than granite (SiO2).
On the near side, the crust is thinner and younger, where volcanic
activity persisted even after ocean water was converted into oxygen.
Similar situation as on Earth where oceanic crust is thinner and
younger
and contains most vulcanism. John Curtis

"John Curtis" wrote in message
...
|
|
|
| On 31/07/2011 8:01 AM, John Curtis wrote:
|
http://www.space-travel.com/reports/...i de_999.html
|
| Most granites arose in the Proterozoic, following the
| Great Oxidation Event ~2.4 billion years ago:
| http://elements.geoscienceworld.org/...t/short/6/1/31
| http://gsa.confex.com/gsa/2001AM/fin...ract_27205.htm
| Therefore, silicic rocks such as granite and rhyolite imply
| erstwhile occurrence of oxygen in the lunar atmosphere.
| Dearth of impact craters in the vicinity suggests that the
| volcanic eruptions, which formed the granites, occurred in
| the later stages of planetary evolution, similar to Earth's.
| John Curtis
|
| It seems the far side of the Moon has almost no thorium (other than a
| small hotspot), whereas the near side is almost entirely covered by it.
|
| What would the interpretation for such a hemispheric difference be?
|
| Yousuf Khan
|
| The thorium on the far side exists as thorium silicate ThSiO4, whose
| radiation
| is diminished by dilution with the oxyanion SiO4, as result of oceanic
| origin. Except for Compton-Belkovich anomaly, where thorium
| exists as thorium oxide ThO2, as result of eruption into erstwhile
| oxygenated atmosphere. Same situation as on Earth where basalt
| (SiO4) shows less radiation than granite (SiO2).
| On the near side, the crust is thinner and younger, where volcanic
| activity persisted even after ocean water was converted into oxygen.
| Similar situation as on Earth where oceanic crust is thinner and
| younger
| and contains most vulcanism. John Curtis
|
Any fluids present, such as atmosphere, would be subjected to tidal
effects.
As we observe, Earth has oceanic tides as it turns within the hydrosphere.
Whatever chemistry was going on, and I bow to your greater knowledge
on that score, it is only part of the story. The early Moon would not turn
(or turn very slowly) within any hydrosphere or atmosphere it may
have had, leaving permanent high tides on the near and far sides with
permanent low tides at the limbs until the lighter elements evaporated
into space.
-- Androcles

On 03/08/2011 12:19 PM, John Curtis wrote:
It seems the far side of the Moon has almost no thorium (other than a
small hotspot), whereas the near side is almost entirely covered by it.

What would the interpretation for such a hemispheric difference be?

Yousuf Khan

The thorium on the far side exists as thorium silicate ThSiO4, whose
radiation
is diminished by dilution with the oxyanion SiO4, as result of oceanic
origin. Except for Compton-Belkovich anomaly, where thorium
exists as thorium oxide ThO2, as result of eruption into erstwhile
oxygenated atmosphere. Same situation as on Earth where basalt
(SiO4) shows less radiation than granite (SiO2).
On the near side, the crust is thinner and younger, where volcanic
activity persisted even after ocean water was converted into oxygen.
Similar situation as on Earth where oceanic crust is thinner and
younger
and contains most vulcanism. John Curtis

There was a report published today speculating that there could've been
two moons around Earth at one time, and the smaller one crashed into the
bigger one and became part of it.

BBC News - Earth may once have had two moons
http://www.bbc.co.uk/news/science-environment-14391929

Yousuf Khan

Yousuf Khan wrote:

There was a report published today speculating that there could've been
two moons around Earth at one time, and the smaller one crashed into the
bigger one and became part of it.

More simulation bull****. For all planets and moons (Earth, Mars, Moon
Ganymede...) surface dichotomy has always the same origin: tectonics.

--
Florian
Alle Wahrheit durchläuft drei Stufen. Zuerst wird sie lächerlich
gemacht oder verzerrt. Dann wird sie bekämpft. Und schließlich wird
sie als selbstverständlich angenommen. - Arthur Schopenhauer

On 04/08/2011 11:55 AM, Florian wrote:
Yousuf wrote:

There was a report published today speculating that there could've been
two moons around Earth at one time, and the smaller one crashed into the
bigger one and became part of it.

More simulation bull****. For all planets and moons (Earth, Mars, Moon
Ganymede...) surface dichotomy has always the same origin: tectonics.

Could be, I'm agnostic on this one. It could be either reason. If it was
plate tectonics, then that means that the tectonics stopped long time
ago and the moon got stuck with supercontinent on one side of its face.

If it was a second moon crashing, then it's a remarkably well
distributed splash down over the surface of the primary moon. Iapetus on
Saturn is supposedly a victim of a smaller moon crashing into it too.
But it resulted in a huge mountain range along its equator that makes it
look like walnut. The crashed moon seemed to distribute itself in a
linear fashion in that case.

Yousuf Khan

Yousuf Khan wrote:

If it was plate tectonics, then that means that the tectonics stopped
long time ago and the moon got stuck with supercontinent on one side of
its face.

It was not plate tectonics and yes, it stopped a long time ago.

--
Florian
Alle Wahrheit durchläuft drei Stufen. Zuerst wird sie lächerlich
gemacht oder verzerrt. Dann wird sie bekämpft. Und schließlich wird
sie als selbstverständlich angenommen. - Arthur Schopenhauer