Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6140
EASTING 566260 NORTHING 6054360 ZONE 14 DATUM NAD83
Date of mapping 06/16/1986

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
metamorphic layering | 56 | 77 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 56 | 77 |

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
gneissic
garnet-sillimanite bearing
Field Description:

-30 to 35% quartz
-rock has much of textural appearance of MXAK
-layering is totally disrupted with the outcrop being 20% granitic lit
-MV has been almost completly altered to SM
-red GR is a common assessory
-in general the rock doesn't look proper for a migmatite
-this may be a combination of thermal metasomatic effects from the core granite
-it seems unlikely this rock has reached anatexsis unless we are west of another major boundary
-several irregular unzoned biotite-rich microcline-oligoclase pegmatites
-they are marginal peraluminous, MV poor
-these may represent either the eastern end of the Manago or more likely the western most primitive Nelson series pegmatites
NOTED: -3 mm horizon composed of 50% BO and 50% red garnet-doesn't go anywhere and may be a clast

Manitoba Geological Survey, 2017