Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    83     STATION    5175
EASTING   576028     NORTHING   6060516     ZONE   14     DATUM   NAD83
Date of mapping    08/01/1983

STRUCTURAL DATA

PETROLOGIC DATA

Rock Number: 1

Rock Type: pegmatite

Field Description:

-Dike A-39 (misplaced on map)

-2 to 3 m width exposed at water line

-relatively simple dike with quartz-microcline+/-albite+tourmaline+blue green apatite +bird's foot muscovite
-no beryl or spodumene visable
-zoning not well developed

Dike trends 024 degrees with variable dip
-it appears to be fairly tightly folded about a 262 degree axial surface with a penetrative axial planar fabric in the dike

-I think this may be an older dike not necessarily related to Tanco / Spodumene islands dikes

-photos of axial plane foliation in fold of dike

PHOTOS


Photo showing the developement of axial planar fabric in the nose of folded pegmatite.


Detail of fabric in folded pegmatite.


General view of pegmatite. This is Anderson A-39.
Appears this pegmatite was misplotted in Anderson thesis.


Manitoba Geological Survey, 2017