I'm thinking you mean DY junction, which was kinda featured in 'stay away joe' a pretty neat book that was turned into a really screwed up movie with elvis.
At any rate, last time I was down there (in that area--not your claims) I took some samples myself and dropped them off
at one of the foremost experts in canada. Was talking with him today---it is kimberlite, very strongly phlogopite, about 1/4 dolomite wallrock, got some minor quartz vermiclulite/fluourapatite. 'bout the most neatest sample i had was that of a kimberlite mud-ball, so havn't quit the day job! (these are blasted possibly thousands of feet into the air and absorb a neat cross section of associated gases, etc, in transit and formation)
I know where a formation is that had been kinda mined for rip-rap yrs ago, so got a bit of a cross section w/o having to excavate.