Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 84
STATION 5450
EASTING 572508
NORTHING 6055358
ZONE 14
DATUM NAD83
Date of mapping 06/23/1984
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
schistosity | 210 | 85 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
0 | Molson dike | 0.25 | 201 | 59 |
Type | Symmetry | Strike | Dip | Plunge | Azimuth |
---|---|---|---|---|---|
similar fold | S | 0 | 0 | 54 | 138 |
-greywacke show S0 bedding, S1 phyllosilicate schistocity bedding parallel and S2 schistocity axial planes to folds causing crenulation on fold noses
-axial planar fabric also paralleled by cataclastic zones
PETROLOGIC DATA
Rock Number: 1
-psammite dominant greywacke section with (5 to 10 cm) pelite layers and 20 to 30 cm semi-pelite layers
-delicate laminations and .5 to 1 cm scale
-at first appearance looks like typical Burntwood metatexite but is really middle amphibolite muscovite-blastic greywacke with 30% injected granitic and pegmatitic lit
-pelite layers are 60% muscovite and 40% biotite
-the presence of muscovite knots and small plagioclase blasts make me suspect it is just at "staurolite-out" grade
-sample 1 a psammite
-sample 1 b semi-pelite
-sample 1 c pelite
Rock Number: 2
-vein and dike network of coarse leucogranodiorite
-extensivly folded with the gneissic
-associated with 5% tourmaline-muscovite-biotite pegmatite
-grandiorite doesn't seem to contain muscovite
-sample representative
Mineral | Abundance (%) |
---|
tourmaline |
Manitoba Geological Survey, 2017