Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5485
EASTING   576314     NORTHING   6041167     ZONE   14     DATUM   NAD83
Date of mapping    06/28/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 58 61

PETROLOGIC DATA

Rock Number: 1

Rock Type: gabbro

Field Description:

-same gabbro occurs since last station with varying degree of intrusion by augen granodiorite and a more quartz rich variety (rock 2)
-also numerous 2 feld, muscovite pegmatites
-in general map unit should be gabbro and intrusives
-at the back of the bay near the road are layers up to 10 m thick of anorthosite (samples A & B) interlayered with "leopard rock" (sample C)
-most is massive anothosite but there are some narrow (sheared) zones of ovoid gabbro and football anorthosite

Rock Number: 2

Rock Type: granodiorite
Descriptors:
quartz-biotite

Field Description:

-pink and grey quartz rich non-porphyritic grandiorite
-varying degrees of cataclasis throughout all units
-one raft of what looks like volcanic or volcanoclastic rock in granodiorite with gabbro on both sides


Manitoba Geological Survey, 2017