<human>: Can you succinctly summarize the text in 1-3 sentences?

I broke my collarbone this time last week, by crashing my bike on one of my final mega training rides, for Ironman Australia (first time), in three weeks time. FML.

I'm out of action for about six weeks. I'm also booked in for the Gold Coast Marathon six weeks after that, which I originally thought was a dumb idea to go ahead with, but toying with it now. My legs are fine, well,; the stitches in the knee are an issue, but they'll be gone soon. All the info I found online about coming back after injury related to actual running injuries.

My thoughts are: If I started straight back into long runs of 12/15/21/26/32 km on successive weeks, then 2 weeks of taper, would I likely to be okay for the race or would that be a high chance of injury? (Would take it very easy on the speedwork.)

Background: I've been running seriously for over 2 years now, and have done a road marathon, a trail marathon amongst other races. Was doing about 40km/wk in the leadup to IM, was previously up to 70 before cycling took over all the time.
<bot>: Is six weeks of running, after a forced six weeks of none, going to be enough to run a marathon without injuring myself?