Cross Lake Project (1983-86)
Geologist P.G. Lenton
Year 83
STATION 5042
EASTING 571202
NORTHING 6041591
ZONE 14
DATUM NAD83
Date of mapping 06/23/1983
STRUCTURAL DATA
Structure type | Strike | Dip | Separation |
---|---|---|---|
gneissosity | 11 | 76 |
Rock Number | Type | Width (m) | Strike | Dip |
---|---|---|---|---|
2 | diabase | 2.20 | 283 | 78 |
-inclusion of layered amphibolite
PETROLOGIC DATA
Rock Number: 1
-same as before except megacrysts are slightly more obvious
-strange 0.2 x 3.0 m lenticular pods of pegmatite: quartz core surrounded by microcline-plagioclase
-Garnets (upto 8mm) in margins and as halo around pods for several cm's. Looks like an in situ miarolitic type of development, not a dike
-Sample on tape for Xray ID of waxey grey-green mineral in pod
May be altered feldspar
Xray ID: xenotime
Type | Mineral | Min. Size | Max. Size | Abundance (%) | Unit |
---|---|---|---|---|---|
phenocryst | plagioclase | 0.0 | 0.0 |
Mineral | Abundance (%) |
---|
garnet |
Rock Number: 2
-chill margins and coarser core that has large pyroxenes and probable magnetite-serpentine pseudomorphs of olivine
Mineral | Abundance (%) |
---|
pyroxene |
olivine |
serpentine |
Manitoba Geological Survey, 2017