Aside from Aphophis' ship gate mysteriously vanishing with no mention, they've been consistent in stating that Stargates are indestructible in all cases short of overcharging the naquadah inside the gate or using a naquadria bomb to vaporize one.
They destroyed a planet by setting off all of its naquadah deposits, which, in theory, turned the whole planet into a "giant ball of super heated plasma." All that energy wasn't sufficient to destroy the gate, so it's highly unlikely that the destruction of a Goa'uld ship would come close.
As to the Alkesh crashing into a Stargate in "48 Hours," here's a quote from the episode:
DHDs are extremely fragile, Stargates are not, so the problem in that episode was that the Stargate lost power when the DHD was taken out, not that the Stargate itself was destroyed.
They destroyed a planet by setting off all of its naquadah deposits, which, in theory, turned the whole planet into a "giant ball of super heated plasma." All that energy wasn't sufficient to destroy the gate, so it's highly unlikely that the destruction of a Goa'uld ship would come close.
As to the Alkesh crashing into a Stargate in "48 Hours," here's a quote from the episode:
CARTER
If the Alkesh crashed into the DHD on the other planet it would have cut off power to the outgoing gate. Then the wormhole would have been severed prematurely. Now if that happened before our gate was able to reconvert Teal'c's energy signature back into matter...
If the Alkesh crashed into the DHD on the other planet it would have cut off power to the outgoing gate. Then the wormhole would have been severed prematurely. Now if that happened before our gate was able to reconvert Teal'c's energy signature back into matter...
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