2 Things, Destiny and After SGU (SPOILERS)

[Xaeden]

Also i'm pretty sure that Naquadriah wasn't natural to a planet, something todo with setting a Naquadah bomb off that converts Naquadah to Naquadriah over time?

Yes, it's an artificial creation of the Goa'uld, Thanos. He created some in a lab which thereafter exploded, releasing "the sub-atomic particles which catalysed the conversion of the first vein of Naquadah." How it came to be that the mishap of one Goa'uld scientist who died in that event was purposefully or also mistakenly replicated on the two planets seen in SGU was never explained on screen. Nevertheless, in addition to needing to be created, it also has a shelf life. Thanos' experiments took place 3,000 years ago and it was estimated that in another 10,000 years the naquadria would have reverted back to naquadah:

CARTER: After that, it simply lay in the ground. Another ten thousand years and it would have decayed back into Naquadah if you hadn't mined it first.

So for naquadria to exist in the Pegasus galaxy either the Ancients, Wraith, or some advanced human group would have had to independently realize that they could convert naquadah into naquadria (or Thanos would have had to learn of it from an Ancient source) and done so no more than ~13,000 years ago.

[garhkal]

Also i'm pretty sure that Naquadriah wasn't natural to a planet, something todo with setting a Naquadah bomb off that converts Naquadah to Naquadriah over time?

Then how were both the Icarus and that other planet the LA had so rich? Surely Thantos didn't bomb them too.

[Xaeden]

As I said in my previous post, it was not addressed on screen, but here's what Joe Mallozzi said on his blog:

Kevin writes: “(1) I thought it was established that Naquadria was some kind of isotope of Naquadah in the sense it didn’t occur naturally. (ie. the bomb on Kelowna created more Naquadria). Are these ‘Icarus’ planets somehow naturally occuring ‘now’? Or were they the product of Anubis getting the info from Quinn and then testing it out? And only ‘now’ are people discovering his old testing grounds? (always wondered about that).”

Answer: Yes, we’ve established that Naquadria is not naturally occurring. The assumption is that these are old testing grounds abandoned since the fall of the goa’uld.

Source: https://josephmallozzi.wordpress.com...ellen-kushner/

Also as mentioned, how exactly other Goa'uld ended up recreating Thanos' mistake is something that was only speculate about, but note that the naquadria core planet that the Lucian Alliance found had a visual indicator that it was a former Goa'uld planet in the form of the pyramid.

[thekillman]

It may actually be that Naquahdriah IS naturally occuring. If it's gone after 13000 years, that leaves it with a half-life of some 3000 years? That's nothing on a geological timescale. If a natural event occurred every 1000 years that caused the creation of Naquahdriah, you still wouldn't find evidence, as at any given time maybe 13 planets in the galaxy have measurable quantities of Naquahdriah. So even if it's from a natural source, that doesn't make it abundant.

Some high-energy event like a massive solar flare or so may produce the particles needed to create naquahdriah, and if they too have a half-life then naquahdriah conversion in nature may simply be very rare.

[garhkal]

It may actually be that Naquahdriah IS naturally occuring. If it's gone after 13000 years, that leaves it with a half-life of some 3000 years? That's nothing on a geological timescale. If a natural event occurred every 1000 years that caused the creation of Naquahdriah, you still wouldn't find evidence, as at any given time maybe 13 planets in the galaxy have measurable quantities of Naquahdriah. So even if it's from a natural source, that doesn't make it abundant.

Some high-energy event like a massive solar flare or so may produce the particles needed to create naquahdriah, and if they too have a half-life then naquahdriah conversion in nature may simply be very rare.

Very good thought. Especially on the latter part of how it might have come to pass.