Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 84 STATION 5643
EASTING 569195 NORTHING 6048742 ZONE 14 DATUM NAD83
Date of mapping 07/23/1984

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 271 | 67 |

Linear Structures
Type | Plunge | Azimuth
mineral lineation | 56 | 69

PETROLOGIC DATA

Rock Number: 1

Rock Type: greywacke
Descriptors:
schistose
lithic
Field Description:

-same rock as previously called mafic greywacke but here texture better preserved and lithic fragments can be recog.
-these appear to be massivly bedded, there are numerous HB bearing feldspathic aggre. that may be remnant of felsic interbeds or an odd type of alteration assoc. of calc. silicate development

Minerals of Note
Mineral | Abundance (%)
hornblende
biotite
tourmaline

Rock Number: 2

Rock Type: pegmatite
Descriptors:
granitic
Field Description:

-slightly podded, possibly folded mass of peristerite pegmatite
-generally constrained to the foliation, containing highly irregular contacts composed of persterite, tourmaline, perthitic microcline, blue green apatite, and quartz
-relativly quartz poor peg.
-dike varies from 17 m to less than 1 m
-it is foliated and locally sheared, textural variation is prominent, but the body is not coherently zoned

Manitoba Geological Survey, 2017