Cross Lake Project (1983-86)

Geologist P.G. Lenton Year 86 STATION 6268
EASTING 567416 NORTHING 6048410 ZONE 14 DATUM NAD83
Date of mapping 06/29/1986

STRUCTURAL DATA

Layering:
Layering type | Strike | Dip | top Direction
bedding | 22 | 69 |

Planar Structures:
Structure type | Strike | Dip | Separation
schistosity | 22 | 69 |

-bedding appears to be nearly continuous but with minor disruptions,
-original bedding and foliation may not be quite parallel with incomplete transposition of primary into foliation

PETROLOGIC DATA

Rock Number: 1

Rock Type: sandstone
Descriptors:
bedded
feldspathic
Field Description:

-light grey delicately bedded feldspathic unit
-would appear to be interbedded with a more mafic HB-bearing feldspathic wacke lamiations within 3 to 15 cm beds is on the order of 5 mm
-deformation and recrystallization is little to great to see interval bedforms

Minerals of Note
Mineral | Abundance (%)
garnet
muscovite
magnetite

Rock Number: 2

Rock Type: wacke
Descriptors:
laminated
feldspathic
Field Description:

-laminated feldspathic wacke
-fissile, laminated on mm-scale contact with sandstone parallel to foliation slightly rusty weathering with irregular leucosome knots
-discontinuous lenses or streaks of diverse rock types including amphibolite up to 15 x 60 cm
-this may be an extremly flattened conglomerate unit
-2.5 m is exposed between 2 sandstone layers
-sandstone structurally overlies the conglomerate and contains small 1mm x 5 mm structures that wer probably lithic fragments so therefore upper unit is probably a lithic sandstone

Minerals of Note
Mineral | Abundance (%)
garnet
hornblende

Rock Number: 3

Rock Type: granite
Descriptors:
pegmatitic
leucocratic
Field Description:

-pematitic leuco-GRNT
-dikes up to 2.5 m thick of aplitic to pegmatitic persterite GRNT
-irregular quartz pods in a dominantly med. grained BO-Garnet-tourmaline-GRNT
-feldspar megacrysts up to 20 cm irregularly distributed
-pegmatite pods are unzoned-->sample taken

Manitoba Geological Survey, 2017