RP 569(A) PRELIMINARY REPORT, GEOLOGY OF DRUMMONDVILLE AREA (EASTERN PART), ARTHABASKA, DRUMMOND AND RICHMOND COUNTIES P.R. 569 GOUVERNEMENT DU QUÉBEC 4. DEPARTMENT OF NATURAL RESOURCES ~ Honorable PAUL-E. ALLARD, Minister MINES BRANCH GEOLOGICAL EXPLORATION SERVICE GEOLOGY of DRUMMOND VILLE AREA (Eastern Parti ARTHABASKA, DRUMMOND AND RICHMOND COUNTIES PRELIMINARY REPORT by Yvon Globensky 76° 74° 72° 70° 68° t ~~ ~` '3: ~. /!a ` .4. ~ _.~ ~ ~ ~.~ I L. du b7dl.• ,1-~. ~ M ~.Fare4eille ~.r '~ ~~~ _ k P~.a.,, a _,..-41J !'~~~ ~ ~ , St FBR~ri1~ ..-+.. - -~Chicoulilni .,p ~ . V. : . ~ ~/ R'rwdci.. }LSè:HVOIü ~ , ~> 'i~.~ .,,~. I GOWN ~ ~ ~ \ ~ Mrida &~M ` `', ' Tadouwc _, -. E $ ,: ~ $ (~,r~ 48 48°-- ___.. ~ . ~ 'f'J— Parent r I— . .. i c;l Z ~ \ ;~ ère-du LoûP I I . F _ _ f . 1 )-_ 1t,r° ne • ' 1.„,,,, Mania'Malh.ro ~ ~~ I ~ ‘ L. Kempf La TO-quoque '. n I c° 3A ~ Q.•~ t ` i i', ~ I ~ \`~• ~~. oc ' Ric:L-Pienrce, L. Maaèernas k. 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ALLARD, Minister MINES BRANCH GEOLOGICAL EXPLORATION SERVICE GEOLOGY of DRUMMOND VILLE AREA [Eastern Part) ARTHABASKA, DRUMMOND AND RICHMOND COUNTIES PRELIMINARY REPORT by Yvon Globensky QUÉBEC 1969 P.R. 569 Preliminary Geological Report on DRUMMONDVILLE AREA* (Eastern Part) Arthabaska, Drummond and Richmond Counties by Yvon Globensky ' INTRODUCTION The Drummondville area, covering approximately 210 square miles, is 75 miles east-southeast of Montreal and 80 miles west-southwest of Quebec City. Bounded by latitudes 45°45' and 46000' and by longitudes 72000' and 72015', it cor- responds to the eastern half of the Drummondville Federal topo- graphic map (31 H/16E). The northern part of the area is in Arthabaska county, the central and southwestern parts in Drummond county and the southeastern part in Richmond county. The area includes Warwick and Kingsey townships, as well as parts of the following: Horton township in the northwest corner; Tingwick township at the eastern border; Cleveland township at the southern border; and Durham township in the southwest corner. Danville is the largest village in the area. It does not support any major industry, most of its labor force being employed in the mines at nearby Asbestos. Other villages * Translated from the French include Sainte-Clothilde, Sainte-Séraphine, Sainte-Elizabeth- de-Warwick, Kingsey Falls and Saint-Félix-de-Kingsey. Numerous gravel roads provide access to the var- ious villages. The main paved road, Highway No. 5, follows the eastern boundary of the area between Kingsey Falls and Danville to the south. The only other paved road, Highway No. 20, cross- es the northwest corner of the area and links Sainte-Clothilde with Victoriaville, which lies outside the area. A Canadian National railway line, along the south- east boundary of the area, joins Victoriaville to Richmond, passing through Danville. 'TOPOGRAPHY AND DRAINAGE Most of the area is of low relief, with an aver- age elevation of 350 feet above sealevel. The topography, how- ever, becomes more irregular to the south, where the tops of some of the hills are 500 to 900 feet above the surrounding terrain. Northeast of Kingsey Falls, a small height of land along the eastern boundary of the area is 750 feet above sea- level. This elevated section covers only a small part of the boundary east of the map. Deposits of sand and clay, as well as some marsh- land, cover a large part of the area. Outcrops are rare, there- fore, particularly to the north of the Nicolet-Sud-Ouest river. This river crosses the area in a northwest direction and divides it into two unequal parts, the northern part being the larger. Francoeur creek flows into the Nicolet-Sud-Ouest river east of Kingsey Falls. The Landry river joins it north of Danville. The Nicolet river follows part of the northern boundary of the area, exhibiting, in one place on the south side of the river, a perfect example of an oxbow lake. The Saint-François river cuts through the extreme southwest corner of the area. The des Rosiers river, near the eastern boundary of the area, joins the Nicolet river to the north by means of a drainage canal. Streams of lesser importance include the Patate, Dubuc, Abercrombie and Gilchrist. Patate lake is in the northwest corner of the area; Perkins pond and Burbank pond are in the southeast corner. The waters of the area drain to the Saint-Laurent river, mainly by means of the Nicolet-Sud-Ouest river. 3 - 'GENERAL GEOLOGY The rocks of the area are Lower Paleozoic in age. Mostly of sedimentary origin, with some volcanic and intrusive rocks, they have been grouped as follows into 11 formations. Tibbit Hill Formation This formation, generally found at the base of the Oak Hill Group, and thought to be Lower to Middle Cambrian in age, is a gray-green schist of volcanic origin, made up of chlorite, epidote, albite and carbonate. These schists, con- taining amygdules of epidote and albite, are exposed in the southern part of the area. Call Mill Slate This formation, exposed in the southern part of the area, is made up of a pale gray phyllite containing quartz, muscovite, albite and chlorite. Pinnacle Sandstone This greenish gray, white weathering, well strat- ified (although massive-appearing) sandstone occurs at the southern limit of the map-area. Bonsecours Formation This formation, which outcrops in the southern part of the area, is a greenish gray muscovite-chlorite phyl- lite or schist, in places grading to a gray quartz-muscovite variety. Durham Dolomite and Scottsmore Sandstone The white to gray Durham dolomite and the light gray Scottsmore dolomitic quartzite occur as a long band in the southern part of the area; they could not be differentiated in the field. Sweetsburg Formation The rocks of this formation, generally placed at the top of the Oak Hill Group, outcrop in the south-central part of the area and along the eastern boundary. They include a gray muscovite-bearing phyllite with local interbeds of quartz- ite â-2 inch thick, a greenish gray quartzose phyllite con- taining muscovite and chlorite, and a greenish gray dolomitic schist containing quartz and sericite. - 4 .- Format'iori A This formation underlies most of the eastern part of the area and much of the central part. It is made up of gray-black argillaceous, calcareous and graphitic schists, with interbeds of gray to dark gray limestone. Numerous calcite veins cut the assemblage. Cooke (1952) included the limestone in the upper part of the Oak Hill Group; Osberg (1955) considered it as a member of the Sweetsburg Formation. In the western part of the Drummondville area, the author has grouped these limestone beds into one unit (Unit No. 1). Although they show certain similar- ities to the Melbourne limestone, they have been identified as belonging to Formation A, because a definite correlation with the type section at Melbourne could not be established. It is possible that the Melbourne limestones are in fault contact with the limestones of Formation A. It is also possible that we are dealing with the same limestone, but we prefer, for the time being, to place them in separate units. Caldwell Group Rocks of the Caldwell Formation, of Cambro - Lower Ordovician age (Caldwell Group, Cambrian?, Cooke, 1952), outcrop in the southeast corner of the area. They are made up essenti- ally of impure sandstone, with interbeds of gray or green phyl- lite. Lesser amounts of mauve, green or brownish gray phyllite have also been mapped, as well as a very narrow band of basic metavolcanic rock. Formation B Formation B, exposed in the northwest corner of the area, is made up of green and red sandstone, interbedded with red, green and gray slate and minor siltstone. This litho- logy is similar to that of the Charny Formation of the Quebec area and the Granby Formation of the Granby area. The medium to coarse grain gives the sandstone a lithic appearance compared to the other outcrops of the area. The distribution of the components of the rock varies considerably. Grains of quartz and fragments of dark gray slate predominate. At the base of the sandstone beds is a conglomerate made up largely of pea- sized grains of quartz and a few fragments of slate. Primary sedimentary features, such as grain gradation and load casts, are much in evidence where the sandstone overlies the slate. Rare exposures of red slate, in places grading into a siltstone of the same color, have been noted. - 5 - TABLE OF FORMATIONS Stratigraphic Era Period Unit' Lithology Cenozoic Pleistocene Sand, gravel and erratic boulders Ordovician Dioritic gabbro Formation C Pyroclastic rocks Gray, bluish gray and green phyllite Gray and bluish gray phyllite, with frag- ments and beds of quartzite and sandstone Cambro- Gray to gray-green and red quartzitic Lower Formation B sandstone, interbedded with red, green Ordovician and gray slate Impure sandstone, with interbeds of gray Caldwell or green phyllite Group Mauve, green or brownish gray phyllite Basic metavolcanic rock Argillaceous, calcareous and graphitic Formation A schist, with interbeds of argillaceous graphitic limestone