Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6357
EASTING 558729 NORTHING 6043843 ZONE 14 DATUM NAD83
Date of mapping 07/13/1986

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 72 | 87 |

Minor Folds
Type | Symmetry | Strike | Dip | Plunge | Azimuth
similar fold |  | 0 | 0 | 46 | 87
similar fold |  | 0 | 0 | 54 | 251

-2 axis measurements are on the same synformal fold running length of outcrop

PETROLOGIC DATA

Rock Number: 1

Rock Type: amphibolite
Descriptors:
layered
hornblende - diopside bearing
Field Description:

-Rousell's 4A greywacke is not present
-granitic injected and isoclinally folded high grade ampb
-at a guess I would say because of the layering and general appearance it once was a basalt
-point is folded by a tight syncline that has a generally sub horizontal axis but rises and falls giving opposing plunges
-minor sulfur gossan in core of synform--hinge live appears to be sheared out
-there appears to be a massive and layered sequence of ampb with some of the layered units probably sedimentary ampb
-one layer about 3 m thick(?) at south side of outcrop is a strange blastic plagiclase phyric mafic rock
-it has some of the appearance of a shoreshonitic basalt
-this unit is not separated on the north of the fold unless the fold is highly assym. and the unit reappears in the lake

Minerals of Note
Mineral | Abundance (%)
garnet

Manitoba Geological Survey, 2017