Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5127
EASTING 575523
NORTHING 6041641
ZONE 14
DATUM NAD83
Date of mapping 07/10/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
gneissosity | 32 | 47 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
1 | Molson dike | 0.00 | 234 | 67 |
-234/67--excellent measurement of hanging wall contact
-2 photos of hanging wall with offshoot dikelets
-1 photo of subsidiuary dike around 1 m above contact
PETROLOGIC DATA
Rock Number: 1
-26 m of exposed Molson dike
- sample 1a chill marging around 8 mm thick into very fine grained gabbro
-sample 1b 10 m into dike - pyroxenitic gabbro
-sample 1c 25 m into dike - coarse metagabbro with possible 2 pyroxenes
-still coarsening at end of exposure-probably around double exposed width around 50 to 55 m.
Rock Number: 2
-25 % grey granodiorite component
-no visable thermal effects of molson dike
PHOTOS
Hanging wall of Molson dike showing marginal chill and injection into country rock.
Small diabase dike paralleling the main dike in the augen gneiss.
Manitoba Geological Survey, 2017