Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5531
EASTING 568909
NORTHING 6053538
ZONE 14
DATUM NAD83
Date of mapping 07/03/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
cataclastic foliation | 243 | 68 |
PETROLOGIC DATA
Rock Number: 1
-shore line along this section is 65% intrusive and 35% GRCK
-lots of pelite and semi-pelite with subordinate psammite
-highly garnetiferous
-shearing is so intense that granite, pegmatite and GRDR lit are largely homogenized into seds. resulting in a mylonitic schlieric gneiss
-pelite is preferentially invaded
-numerous rusty gossans
Mineral | Abundance (%) |
---|
garnet |
Rock Number: 2
-LARGE SAMPLE FOR ANALYSIS
-microcline porphyritic 2 mica granite as dikes parallel to foliation upto 1.5 m thick and down to cm size lit
-large dikes sheared but not as much as seds.
-small veins are augened
-possible candidate for young batholith source
-analysis may tell
Rock Number: 3
-old gabbro dike parallel to cataclasis
-it is extensivly sheared, recrystallized and altered
-around 5 m exposed as south side of narrow swampy break in outcrop
-could be as much as 25 or 30 m max.
Rock Number: 4
-grey homo-equi fine grained GRDR similar to youngest unit in CWB complex
-<1% of dikes are this material
Manitoba Geological Survey, 2017