INDATA LAKES MERCURY SHOWING

This property is on the east side of Indata Lake about
1 mile from the south end, It may be reached by road from Fort St. James
to the east end of Chuchi Lake’ (first Mation Lake), a distance of 75 miles,
‘and thonee an additional 40 miles by water up the Nation Lakes, The
property comprises nine claims, staked in the summer of 1940 by D. and M.
Roddacker and associates, The Consolidated Mining and Smelting Company
optioned the group in the autum of 1940, but after doing some. development
work they dropped. the option in the autumn of 1941, ;

Outerops indicate that these claims are underlain almost
entirely by blue-grey, Permian limestone. Several small dykes of serpentine
cut the limestone. What is believed to be the main break of the Pinchi
fault zone occurs along the esstern boundary of the claims, It forms the
contact with the Permisn limestone on the west and Upper Triassic sedi-
mentary rocks on the east. A fault was observed on the east shore of
Indate Lake on the Sunrise claim. The main cimnebar showing occurs along
this fault, The fault strikes nearly north, dips to the west at about
70 degrees, and its zone of brecciation is 10 to 20 feet wide, It outcrops
along the shore of the lake for approximately 1,000 fect, disappearing
under 25 feet of boulder clay and gravel at the north end and into the
lake at the south end. This fault is offset from a fow inches to 10 feet
to the northeast along a series of cross faults striking north 59 cegrees
east. At its north end the fault follows the contact.of a serpentine dyke
with the limestone for 175 feet. The rocks along the fault have been
altered and brecciated and the grey limestone has been chenged to a buff-
coloured carbonate across a width of 30 fect. A chemicai analysis shows a
mall increase in the silica, iron, and magnesium content, Tho serpentine
dyké has been altered across its entire width of 15 fect to a reddish buff,
ankeritic carbonate with minor amounts of cherty material and green mica.
The cherty material occurs in irregular patches a few inches in diameter.
Stringers of magnesite and of quartz 1/8 inch to 2 inches wide cut the
altered dyke.

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Most of the cinnabar occurs as scattered grains, either in
the cherty fragments in the serpentine dyke or in similar fragmonts in the
fault breceia. The concentration of cinnabar in the surface showings is
too low to make ore. i

INDATA GROUP

The Indata group of claims is east of the Indata Lake mercury
showing. The group consists of six claims, Indata 1<6, and is ommed by the
Consolidated Mining and Smelting’ Company. The claims may be reached by a

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trail about j: mile long from the south end of Indata Lake,