Cross Lake Project (1983-86)


Geologist    P.G. Lenton     Year    84     STATION    5564
EASTING   574743     NORTHING   6046624     ZONE   14     DATUM   NAD83
Date of mapping    07/08/1984

STRUCTURAL DATA

Planar Structures:
Structure type Strike Dip Separation
cataclastic foliation 288 48

PETROLOGIC DATA

Rock Number: 1

Rock Type: feldspar porphyry
Descriptors:
massive
biotite-microcline bearing

Field Description:

-charcoal grey porphyry with MC phenocrysts upto 8 mm
-phenos euhedral to subhedral
-fabric less intense so phenos aren't augened
-contradictory evidence for age relationship-FDPP seems to both intrude and be included in GRDR
-my gut feeling is that the fabric is far less intense in the FPPP than the GRDR so it intrudes the GRDR but later cataclasis scrambles the contact relations

Rock Number: 2

Rock Type: granodiorite
Descriptors:
cataclastic
biotite - chlorite bearing

Field Description:

-as previous station except possibly less mafic-texturally they look the same
-probably as inclusions in FPPP


Manitoba Geological Survey, 2017