Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5503
EASTING 576428
NORTHING 6042152
ZONE 14
DATUM NAD83
Date of mapping 06/29/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 40 | 41 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
0 | Molson dike | 0.25 | 149 | 78 |
PETROLOGIC DATA
Rock Number: 1
-bulk of outcrop is a white weather grey on fresh surf., slightly schlieric TNLT
-it is probably part of Clearwater Bay complex
-if this is so it is one of the best preserved examples
-it holds a very unusual intrusive relation with rock #2
-margins of large rafts are commonly pegmatitic containing brecciated inclusions of mafic and ultramafic rocks
-rock #1 Sample B - duplicate sample for analysis
Rock Number: 2
-unusual rock type not encountered before
-it is a moderatly mafic subgneissic homog. equigranular grey brown GRDR containing scattered, highly deformed mafic schlieren and oval garnet quartz agg. reg. up to several cm in diametre
-it's extensivly intruded by garnetiferous quartz monzanite pegmatite
-the whole w side of island is GRDR
-the origin of mafic inclusions along the boundary is uncertain but would seem to support the idea that GRDR is a rafted complex
Manitoba Geological Survey, 2017