Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5158
EASTING   575986     NORTHING   6048206     ZONE   14     DATUM   NAD83
Date of mapping    07/20/1983

STRUCTURAL DATA

PETROLOGIC DATA

Rock Number: 1

Rock Type: pegmatite

Field Description:

DIKE A-3

-podiform dike with maximum width of 322 cm and minimum of 87 cm
-exterior zones well defined
-exomorphic .5 to 1 cm of intense tourmineralization
-border zone--aplite and tourmaline 5 mm
-well zone; 2-12 cm, clevelandite+/-quartz, garnet, tourmaline

Upper intermediate zone
-core 63 cm, coarse quartz stringers in clevelandite, minor microcline,tourmaline,garnet, beryl

CORE ZONE
-quartz poor--some small quartz masses up to 200m
-mainly blocky mottled pink and grey microcline with spodumene and beryl
-symmetrical on other side
-trend of dike 246 degrees
- 287/77 in country rock - grey pebbly psammite, fol. penetrative into dike
-sample of vein of fine grained albitized material with tourmaline and spessartines

-thin section for opaques


Manitoba Geological Survey, 2017