Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 85 STATION 6064
EASTING 573021 NORTHING 6046982 ZONE 14 DATUM NAD83
Date of mapping 06/19/1985

STRUCTURAL DATA

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 231 | 79 |

-Peristerite Bay GRNT study

PETROLOGIC DATA

Rock Number: 1

Rock Type: granite
Field Description:

-variable textured, mottled pink and white peristerite GRNT
-coarse equigranular phae is locally developed in a large leuco-GRNT
-continuity of homogenous rock is very poor, interrupted by broad irregular zones of barren pegamatite
-GRNT has strong fabric with linear gneissic segregation of mafics; producing irregular cleavage
-joints and fractures are common with 3 crossing directions and irregular spacings from 5 to 50 cm
-this is compounded by strong horizontal or near horizontal joint set with average spacing of 30 cm.
-pegmatitic GRNT as a whole is discontinuous as a set of 1 to 5 m near vertical, irregular dikes
-this leads into the main body to the west which is almost completely pegmatitic with septa of supracrystals up to several metres wide
-not much doubt that industrial mineral potential of this body is negliable
-only possible potential would be the coarser pegmatiteis as a source of large proisterite samples that would be workable at a cottage industry level

Manitoba Geological Survey, 2017