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RICKARD TOWKSHIP

Location! Rickard township straddles the Abitibi River. Its west boundary is 6 miles east of Iroquois Falls and 40 miles northeast of Timmins, Its east boundary is 12 miles west of Lake Abitibi. Iroquois Falls lies just off highway No. 1 1 and is served by a spur line of the Ontario Northland Railway, A private road connects Iroquois Falls to Twin Falls on the Abitibi River. A wa^on road connects the Twindyke mine to Twin Falls,

Mineral Explorati on: Gold was discovered in I 9 I 7 in the southwest quarter of the south half of lot 7 , concession TV. A vertical shaft was sunk and high gold values found in a small pocket. Work was done sporadically until 1 9 5 8 . The Twindyke mine is now idle.

In the belief that the Twindyke mine is on a "break" striking northeasterly from Porcupine to Normetal, ground was staked northeast of the Twindyke mine near the Rickard-Knox township boundary. Geophysical work by Lundberg ExpLoration and diamond-drilling by Rio Tinto Canadian Exploration Limited 'Hd pot give encouraging results^ The claims have lapsed.

Several companies have carried out geophysical work in the area in recent years.

General Geology; The bedrock of the area is all Precambrian in age and consists mainly of Keewatin-type basaltic and andesitic flows, Except in narrow shear zones, the rocks have undergone little metamorphism or internal deformation,

Most prominent are Interbedded pillowed and massive lava flows. Thin bandis of rhyolite, rhyodacite, acid tuff and agglomerate comprise a minor proportion of the volcanic succession.

Dikes of quartz porphyry and quartz-feldspar porphyry, a few feet thick, are common in the area. They are similar to porphyries ascribed to the Algoman (4 ) elsewhere in n-ortheastern Ontario,

Three types (and ages ?) of basic intrusions are found in the townshipj Altered gabbroic dikes and other masses (Group 3» Haileyburian 7), Quartz diabase with altered, ovoid feldspar Phenocrysts (Group 5 , Matachewan ?), Quartz-free and possibly oilvine-bearing diabase (Group 6, Keweenawan ?).

The altered gabbro is identical to the coarse middle portions of the massive basic flows and it is probable that some of the rocks mapped as (3) ought to have been groftped with (l).

Evidence was found southwest of the Twindyke mine that the Matachewan (?) dikes cut the quartz-feldspar porphyries and that the Keweenawan (?) dikes are younger than the Matachewan (?) dikes.

In most^outcrops some kind of veining is observed. The veins are usually 2•1 inch thick, but locally exceed 1 foot. The veins may be grouped into several types; ( 1 ) Quartz, (2) Quartz and epidote, (3) Quartz, epidcrite, carbonate with or without actinolite, (4) Quartz, carbonate, and sulphide, and (5) Irregular epidote veins and patches.

In large parts of the area, the bedrock is overlain by unconsolidated Pleistocene deposits up to 200 feet thick. Most wide­spread is brownish varved clay. The sand and pebbly sand which flanks the large esker on the west boundary of the township represents esker material reworked by the lake waters in which the varved clay was deposited^

Structural Geology: The pair of folds which make up the open Z structure in the central part of the township are outlined by essentially vertical f1ows, therefore the folds must have a near-vertical plunge and cannot be described as synclines or anticlines. In Rickard township, the flows all face south or southwest where they are exposed. The pair of folds entering the southeastern part of the area from Knox township are drawn on the evidence of reversals in facing of the volcanic rocks in that township.

The most important, and earliest, shear zones trend east—west or east-southeast and dip steeply south. Shearing and veining apparently are later than the folding, the Haileyburian (?) basic rocks and the Algoman (?) porphyries, but do not affect the Matachewan (?) and Keweenawan (?) dikes.

Economic Geology: At the Twindyke mine, gold was found to be associated with south-dipping quartz-carbonate-sulphide veins that carry disseminated and patchy pyrite and chalcopyrite. The wallrocks ol the veins are strongly Carbonatized regardless of rock type_

Sulphide minerals are widely disseminated in the volcanic rocks. Acid tuff bands, in particular, locally contain patches of massive sulphides (pyrite, chalcopyrite and pyrrhotite).

The esker in the western part of the township could provide sand and gravel should it be required in the vicinity, Coarse material from the centre of the esker was used in the construction of the dam at Twin Falls,

The clay might be suitable for certain types of tile and bricks

Bibliographv

Knight, C.W et al.

1 9 1 9 : Abitibi - Night Hawk gold area; Ontario Bur. Mines, Vol, XXVIII, pt, 2, pp. 1 - 7 0 .

ONTARIO DEPARTMENT OF MINES

PRELIMINARY GEOLOGICAL MAP No, P. 199

R I C K A R D T O W N S H I P DISTRICT OF COCHRANE

Scale I inch to i mile

N.T,S. Reference 42 A / 9 , 42 A/lO. 42 A / I 5 , 42 A/16 G.S C. Aeromagnetic Maps 2 Q 6 G , 297G, 3 0 2 G , 3 0 3 G

L E ( ; E N D FOR RlCKAR.n. KNOX AND KERR5 TOV^'NSHIPS

CENOZOIC

PLEISTOCENE AND RECENT

Sand, gravel and clay.

Unconformity

PRECAMBRIAN

PROTEROZOIC

KFWFENAWAN (?)

6 6 Diabase, olivine diabase^

MATACHEWAN (?)

5 5 Q u d rt z di abase, porphyr itic d iabase^

Intrusive Contact

ARCHEAN

ALGOMAN (?)

4 4f Feldspar porphyry. ' 4q Q u a r tz porphyry.

Intrusive Contact

HAILEYBURIAN (?)*

3 3g Altered gabbro^ 3d Altered diorite,,

• Intrusive Contact (?)

KEEWATIN (?)

2 2a Rhyolite^ ' ' 2b Rhyodacit e^

2g Acid agglomerate, 2t Acid tuff.

1 la Palebasic lava (andesite, trachyandesite, quartz andesite)•

lb Dark basic 1 ava (basaltic types)v Ic Coarse gabbroic lava. Id Medium-grained, massive diabasic lava.. If Basic and intermediate breccia (fIow top breccia) t Ig Andesitic agu;lnmerate. Ip Pillow lava (andesitic),. Ibp Pillow lava (basaltic)^ It Basic tuff, Iv Araygdaloidal lava (vesicular flow tops)^

^ Group 3 includes all altered dioritic and gabbroic masses that could not be proven to be flows of "Ic" type. It is thus possible that a part of the rocks mapped as " 3 " are real ] y G,roup "I" rocks.

SYMBOLS FOR RICKARD. KNOX AND KERRS TOWNSHIPS

Triangulation station.

,?45 Altitude in feet above mean sea level,

I Muskeg and swamp*

1 Boundary of swamp,

- = Wagon road.

|—•• Trail> portage^

Glacial striae,

I v.'. : . ' l Drift feature (not including clay),

X I Small rock outcrop,

; Boundary of rock outcrop,

-'"^ Geological boundary, defined,

' Geological boundary, assumed.

- ^ Geological boundary as indicated by geophysical data.

- Magnetic contours, value in gammas.

Strike and dip,

— ^ Strike and vertical dip.

! Strike and vertical dip3 top in direction of arrow^

^ 4c Direction (arrow) in which inclined beds face as indicated 1 by gradation in grain size,

t ' Direction in which lava flow faces as indicated by : shape of pillows.

f — Trace of axial plane of syncline.

^ j Trace of axial plane of anticline,

\ Strike and dip of schlstositv.

-M^ Strike of vertical schistosity,

I Lineation, plunge unknown, B 0

•• Joxntxng, inclined,*

-•^ Jointing, vertical,*

Fault, defined,

^ Fault, assumed.

(To) Location of mining property.

Property boundary,

• Buildi ng,

a Shaft, vertical,

Gravel pit, stone quarry^

^ Drillhole, vertical, Inclined. j Vein with thickness and dip, quartz vein (qv),

quartz-carbonate vein (qcv); with pyrite (py); with epidote (ep)c

* Only used for closely spaced joints or joints with some shear.,

LIST OF PROPERTIES

1 , Twindyke mine (including the claims of Twindyke Mines Ltd., Riczone Mines Ltd», and MacDyke Oil and Mining Industries Ltd.).

SOURCES OF INFORMATION

Base map derived from maps of the Forest Resources Inventory, Ontario Department of Lands and Forests.

Surficial Geology: Map 4 6 - 1 9 5 9 , Geol. Surv, Canada, Map 28b, Ontario Dept. of Mines, 1 9 1 ° . Reports and maps of mining companies. Aeromagnetic Maps: Map 296G Matheson, Geol. Surv. Canada.

Map 302G Iroquois Falls, Geol, Surv. Canada^ Map 303^! Bingle, Geol, Surv. Canada. Map 297G Porquis Junction, Geol, Surv, Canada.

Geology by P.S. Simony and assistants, 1 9 6 3 ,

Issued 1 9 6 3 .

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