GM 00351 REPORT ON THE TEMISCAMIE RIVER PROPERTY , • P QUEIEC 'DEPARTMENT OF IVIINES C. 0 5 TS .NCH 4.) ICNERAL LEFCS I INIMIRIONISMOP.M.M.M01.1 REPORT ON THE TENISCANIE RIVER PROPERTY OF MISTASSINI LEAD CORPORATION 41•MINMNIMMilr /5 3e Alexander H. TO.t, P. Eng. / Introduction Suimary Property ft 3 History. 11 Resources and Accessibility of Region tt 5 Power " 5 Mining ..•....•.....•.•:•.•• tt I`O Timber " 6 Accessibility ti 7 Geology a General Structure fl 8 Faulting ••..•.••.•• 9 Mineralization lo Development tt 12 Conclusions and Recommendations " 12 .• Maps C, ..,~ PC kt~11 Î i) *4Le ayitua-yvt,Rn.✓A )1f,.4.4~t.P~., 1. Regional geology "Lake M`Ristassini Area" Scale 2 miles to 1. inch Local geology and cross section "Lake Albanel Area" Scale 1 mile to 1 inch, 3. Staking plan, claims and geology "Temiscamie River Area" Scale - mile to 1 inch. Report on the Temiscamie River Property of Mistassini Lead Corporation INTRODUCTION The Directors, Mistassini Lead Corporation, 620,12 Richmond St., East, TORONTO 1, Ontario. The following report is based on an examination of your property in the Mistassini District, This was made from September 25th to October 2nd, 1946. Following this I have made several visits to the area. during the winter. From aerial observations this winter, I would say that the occurrences of lead and zinc are all on one major fault, but the more north- easterly discoveries up the Temiscamie River are probably on the hanging wall side, while those at the opposite end of the property are definitely on the footwall side. The steep west facing escarpment at the top of which the mineralization was found is the usual evidence in this region of the.hanging wall of these areas that have been thrur` up from the southeast. - 2 - SUMMARY The discoveries of lead-zinc mineralization made in late September 1941 are now covered by a group of 99 claims, one mile wide by five miles long, in the Lake Albanel Region of the District of Mist!ssinio Province of Quebec. Road and water transportation of 150 miles followed by air transportation of 70 miles are now the means of access. Following completion of the highway from St. Felicien to Chibougamau and Lake Mis- tassini, there will be a 190 mile road and 80 mile, deep-waterway, However the property is only 150 air-miles from the head :,f steel at Dolbeau on Lake St. John and a 180 mile railroad would give very cheap transportation to a smelter if the district warranted this development. The claimscover a fault in dolomites of the Mistassini series, and on the footwall of this fault are found occurrences of lead-zinc mineralization over a length of three and one half miles. A chert replacement zone of fault breccia is positively known over a width of. 500 feet at one place on the fault, indicating movement and fracturing of major proportions. Due to the fault zone being in a low area of the Temiscamie River and a chain of small lakes, the most promising sections will require diamond drilling to prove the existence of ore bodies, I recommend a minimum of 20,000 feet of diamond drilling together with a geôphysical survey and detailed geological mapping to test this property. I consider that the association of the occurrences of lead- zinc mineralization, with a very evident fault zone, give a most encoura- ging picture of a geological structure which could result in large scale ore deposits. PROPERTY The property under consideration consists of 99 claims co- vering an area five miles long by one mile wide along the Temiscamie River in the Lake Ai.banei region of the District of Mistassini, Province of Quebec. These claims were staked and recorded by prospectors engaged by Mistass ini Explorations Limited and were subsequently transferred to this company and the transfers so registered at the Quebec Department of Mines. AISTORY. Lead mineralization in the dolomites of the Mistassini series was mentioned in the report of the Geological Survey of 1895 by A.P. Low. Further indications in the same dediJion'14 were noted by E4D. Kindle, in a Preliminary Paper of the Geological Survey of Canada, 1942, e-. titled "The Brock River Map-Area". Also in the early nineteen-thirties, 4r. J.P. Morrie found, in the Chibougamag district, a glacial boulder of the same dolomite . containing lead-zinc mineralization. The above discoveries were along the lake shore gin, very limited outcrops and there was never enough interest to is Rwigate the. general geological structure or to attempt to show the ex :)f the mineralization. These occurrences can be seen on the 2-mile ti: ;one inch map of the district. (a) At South end of Lake Mistassini in Post Bay Narrows about two miles north of Budson's Bay Company Post. -4- (b) At Southwest end of Lake Mistassini on West side of Punichuan Bay. Similar rock formation has been the source of many of the great-lead-zinc deposits of North America and it was considered to be a very favourable prospecting ground. for these minerals. This had been suggested at least 10 years ago by lr. Norrie, but prices of these metals at that time and diffidulties of transportation did not encourage explo- ration work until 1945 when the price and transportation picture had improved considerably. A party was sent out in 1945 to. do aerial reconnaiesance of the region and preliminary geological e;pl'oration. In order to get all possible information, a visit was made to the trading poets at the South end . of Lake Mistassini. In 1946, Indian guiders vho were familiar with the region were hired to assist the prospecting parties. A party offeur f men under James M. Neilson,, geologist, was assigned to the Lake Albane . area to, look, for evidence of mineralization in. the sddiments of the Mist asan. series. The only previous paper on the structure of the Mi.stass:in2 series was by Dr. G.W. Norman called "Thrust faulting of Grenville gneisses northwestward against sediments of the Mistassini Series" and . published in the Journal of Geology V. XI III, .5 1940., The map Illus- trating this paper showed that there were faults along the Temisc,a,mie River subsidiary to the main Grenville-Temiscaming thrust fault, contact. Iron^, formation as replacement of the original limestones and dolomites was also noted in the faulted region by Norman. Mr. Neilsen, after a few months in the field studying the general character of the rocks and structure, felt that the most promising section to look for ore deposits was in this area 11,1,6111..•011 .~. ,~.. ~ ...... ~ ,tuM—eM,IM.IAbinPleNI.+,,,IMS•46.41 Ara of known faults. Following this advide the first discoveries along the Temiscamie River fault were made in September, 19460 As it was late in the season, only enough work was done to determine location of the fault zone as nearly ac possible, and the bal- ance of the time available was spent in staking claims to cover this µ on_e RESOURCES AND ACCESSIBILITY OF R.EGIOlT The region of Lake Mistassini is situated north of the height-of-land dividing the water shed 'loving into the St. Lawrence River from that flowing into James Bay. It is northeast of the Chibou- gamau mining district, the property being exactly 100 miles from the airbase at Dore Lake in Chibougamau,. Lake Mistassini is 125 miles long and about 15 miles wide. The southern end called Post Bay is just three miles from Lake Waconichi, a 26-mile long lake between Mistassini and Chibougamau. The discharge of Lake Mistassini is the Rupert River which flows to the northwest into James Bay, The main rivers flowing into Lake Mistassini are the Chalifour from the southeast, the Temiscamie through Lake Albanel from the northeast and the Papaskwasati. and Talus from the north. General trend of drainage of the area is northeast and is largely controlled by glacial deposits and glacial eroe,on. .~.`R~,SOL~R~c~ES.,......~.,~ _....x~- .._... Lake Albanel is four miles to the Ea t of and parallel to Lake MIstassira It is 60 miles long and up to. 8 miles in width. The Imp+ r.w...r.eREW®.NIMMItnwarAMILssw.rArNUA..M swMruwmswMa11gewa1•11011111111110M41111111rrMWMPIN.IWwaWWnaw■wv..,wMw■.wnn.wn1.1a Tamiscamie River flows into Like Albanel at about the, center on the East side and discharges the Lake into Lake Mistassini directly opposite on the West side. Lake Albanel is 70 feet above Lake Mistassini and by the volume of water flowing in the rivers it is estimated that a hydroelectric power development .of 7,000 H.P. all year could be constructed on this discharge, This power site is ten miles from the property. In the same geological structure a large magnetite iron-ore dej: osi ., ha'_ been found about 8 miles from the property. Also about 12 ni,lossway important indications of copper and nickel were discovered. These mineral deposits, as they are developed, should assist materially Lo improve the economic status of the region. TIMBER~._._.._ In many parts ok the region. to Lake Mistassini, excellent timber for lumber ea well as pulp was rioted. It is thought that the unusually gocâ growth of this timber is due to the 1?me soil produced from weathering of the dolomites and limesto ws. Black and white spruce predominate and some individual trees were measured at 30 inches in diameter and 120 feet high. Pulp stands containing as much as 30 cords to the acre were observed. frequently* The climate close to the lake is much more moderate than along the height-of-land to the east, and the .ga swing season for flowers _7_ and vegetables is similar to that of Abitibi.