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