13. Grand Manan, Charlotte County, N.B.. a. Vitreous copper ore, with green carbonate. Geological Survey. Native copper, and copper ores of several varieties, have been found upon Grand Manan at different times, being evidently connected with the igneous outbursts by which a large portion of the island has been formed. The specimen is from a locality recently opened near the southern head of the island, and close to the line of contact of a series of red sandstones and an overlying mass of trap, both of the Triassic Period.-Triassic. 14. Polson's Lake, Antigonish County, N.S...... H. S. Poole, Halifax, N.S. a. Specimens of copper pyrites. For many years loose boulders of copper ore have frequently been found in the soil near Polson's Lake, but their origin was unknown. Recently, however, a vein, said to be six feet wide, has been discovered by sinking sixteen feet through the surface soil to the bed rock. The vein is stated to consist, where exposed, chiefly of spathose ores, spotted with copper pyrites, (see Report of the Nova Scotia Department of Mines, 1875, p. 64).-Upper Silurian. 15. Lochaber Lake. Antigonish County. N.S. James Hudson, Albion From a vein recently discovered and stated to vary from nine to twelve inches in thickness of ore like the specimen exhibited. Zinc Blende or Sulphide of Zinc. ZINC. 1. Blende Lake, near Thunder Bay, Lake Superior.... a. Eleven specimens of vein-matters, mostly blende. Geological Survey. From a vein about eight feet wide on the shore of Blende Lake, a small sheet of water about one mile and a half N.N.W. of the head of Thunder Bay. The vein runs east and west. The north wall consists of beds of ferruginous siliceous clay slates belonging to the Nipigon Series, and the south wall of dioritic schist of Huronian age. The blende (which is of a dark colour) occurs in curving ribs two to four inches thick, transverse to the plane of the vein, in a gangue of white calc-spar, with some galena, and iron and copper pyrites. Silver is also said to have been detected in it. A shaft has been sunk upon it to a depth of twenty-five feet.-Nipigon and Huronian Series. 2. Lot 10, Con. VI. Township of Dorion, C. J. Johnson. Wallaceburgh, O. Lake Superior..... a. Three specimens of blende. The vein is reported by Mr. Johnson to be about three or four feet wide, and to run N. W. and S. E. The locality is about four miles west of Black Bay. It is not yet worked.-Nipigon Series. 3. Paresseux Rapids, Kaministiquia River. L. Superior.... Geological Survey. a. Specimen of crystalline blende. From a large vein varying from ten to twenty-five feet in width, which cross the Kaministiquia in a W. S. W. course about the line between lots 20 and 21 range I. N., in the township of Paipoonge. At this locality the blende may be in suffi cient quantity to prove of economic value. Besides the blende the vein is composed of barytes, quartz, calc-spar and fluor-spar, with a little copper pyrites, iron pyrites and galena. It is supposed to be identical with the Shuniah vein, the large vein on Location M., at the N. W. corner of Neebing.-Nipigon Series. 4. Silver Lake Location, Thunder Bay..... a. Specimens of hand-dressed ore. Geological Survey. These specimens are from the vein on the above location, described under galena, and which also contains blende in promising quantities. (See Lead, No 2).— Nipigon Series. 5. Point aux Mines, Lake Superior,.... a. Specimens of blende with galena. Geological Survey. NOTE. In addition to the above localities for zinc blende on Lake Superior, it may be mentioned that the mineral occurs in greater or less abundance in almost every metalliferous vein which was been opened in the rocks of the Nipigon Series, from Pigeon River to Nipigon Bay. Further east it occurs in promising quantities in a vein in older rocks between Otter head and Michipicoten, and again in veins in the copper-bearing series at Pointe aux Mines and Mamainse. (See Reports of the Geological Survey, 1863 to 1873.) Silver Lake lies at a distance of about six miles northward from the head of Thunder Bay, and at an elevation of about 500 feet above Lake Superior. A short distance to the west of it there is an enormous brecciated vein, some 250 feet in width, composed of masses of the country rocks cemented together with quartz and some barytes and calc-spar, and holding small quantities of galena, copper and iron pyrites, and blende. This has been traced for about three miles. In approaching Silver Lake it contracts rather abruptly, but sends out several branches to the eastward, of which four or five have been followed for considerable distances and are found to be much richer in galena and blende than the great vein. The latter is on the line of a dislocation which increases in going west and appears to die out to the eastward. The downthrow is on the north side, and brings the indurated calcareous marls of the Nipigon series on that side down to the level of the ironore beds (at the base of the series) on the south side, amounting to 400 feet, or upwards, on this location. The specimens are taken from a shaft sunk on a vein on the line of the eastward continuation of the dislocation, at a point from one to two hundred yards south of Silver Lake, and about eighty feet above its level. Here the vein runs N. 80° E. and may be about six feet wide, but its north wall is not well defined. The gangue consists of calc-spar with some quartz and barytes, and holds a good proportion of galena and blende. Mr. John McIntyre of Fort William is agent for the property.-Nipigon Series. 3. Location, "Island No. 2 in Silver Lake"...... C. H. W. Wearne, Toronto. a. Specimens of galena, weighing about 75 lbs. The island known by the above description is traversed by one of the branch-veins referred to under the last heading. The vein runs nearly E. and W., and is described as being about six feet wide, with good walls. The gangue is chiefly calc-spar, with some quartz, barytes, &c., carrying a fair proportion of galena accompanied by blende. Two samples of dressed ore assayed by Prof. Chapman gave an average of 57-53 per cent. of lead and 2 ozs. 6 dwts. of silver per ton of 2,000 lbs.-Nipigon Series. 4. Enterprise Mine, Lake Super-H. ior..... L. Hime, Toronto, Col. Sibley, Silver a. Mass of solid galena with copper pyrites, gold and silver, weighing 116 lbs., b. Mass of galena, with some vein matter, weighing 77 lbs., taken at a depth of sixty feet. c. Two specimens of galena and copper pyrites, polished to show the structure of the ore. This mine is situated on mining lot C. in the township of McTavish, about three miles west of Black Bay. The vein, which runs N. 60° E. and S. 60° W., cuts indurated red marl forty feet thick, underlaid by grey quartzose sandstone, flanked by red granite at about 300 yards to the northward. At the surface there was a thickness of four feet of solid ore like specimen a. According to Professor Chapman of Toronto this ore contains 474 per cent. of lead and 10 per cent. of copper, together with an average of 17 dwts. 12 grs. of gold and 2 ozs. 2 dwts. of silver to the ton of 2,000 lbs. On entering the sandstone the vein became smaller and poorer, but at 100 feet from the surface it had opened out to seven feet in width, and contained bunches of ore like specimen b. Several hundred barrels of ore were shipped from this mine in 1875, and work is still being carried on.-Nipigon or Copper-bearing Series. 5. Location VI.L, Black Bay, L. Superior... . C. J. Johnson, Wallaceburgh, O. a. Specimens of fine-grained galena from the foot-wall of a vein. The above location touches the N. W. corner of the township of Dorion. The vein is described by the owner (Mr. Johnson) as being about twelve feet wide, running north-eastward and underlying to the south-eastward. A parallel vein, underlying towards the first, is said to occur at about twenty rods to the southward, and both are stated to have been traced for a considerable distance on the surface. The gangue is calc-spar with quartz and barytes, and, besides the galena, it contains more or less copper pyrites.-Nipigon Series. 6. St Clair Location, Black Bay, L. Superior. C. J. Johnson, Wallaceburgh, O. a. Specimen of galena, weighing 65 lbs. This location comprises parts of lots 10 and 11 in the 6th, and of 9 and 10 in the 7th ranges of the township of Dorion. As stated in a report by Captain John C. Harking, the vein is twelve to twenty feet wide, composed of calc-spar, quartz and gossan, and carries promising quantities of galena. It runs a little N. of E., has been traced for thirty chains on the surface, and is situated on high ground favourable for mining, at about four miles from Black Bay. The country-rock is said to be red indurated marl, associated with reddish granite, with a high bluff of coarse grey trap a short distance to the northward.-Nipigon Series. a. Specimen of galena, weighing about 150 lbs, from a vein. The vein from which this specimen is taken is being worked on the above lot, situated fifty-six miles north of Belleville on Lake Ontario. At the point which a shaft is being sunk it is sixteen inches wide at the surface, but has increased to four feet с at the depth of ninety-four feet. The vein runs westward through the 1st, 2nd, 3rd and 4th lots of the first concession of Limerick, and has been traced for about three miles. The gangue is crystalline calc-spar with some quartz. Another shaft which is being sunk on a parallel vein is down 100 feet, and the two veins are expected to meet at a depth of about 400 feet. The ore taken out is yet upon the ground, and machinery, buildings, &c., are being prepared for its reduction.--Messrs. John B. Maas & Co. are the owners.-Hastings Series. 9 Loughborough, O., south half of lot 16, range 9.... George Morton, Kingston a. Specimen of galena with gangue of calcite. b. Picked ore. c. Pig lead. The country rock at the Frontenac Lead Mine consists of greyish and reddish gneiss interstratified with thick bands of crystalline limestone, all striking N. N. E. and S. S. W., and dipping to the westward at a high angle. The vein cuts these at right angles, and at the surface has a slight underlie to the north, although at a depth of sixty feet in the main shaft it becomes vertical. The veinstone consists of calc-spar, generally showing a banded structure, and, in addition to galena, containing small quantities of blende and iron and copper pyrites. The galena occurs in scattered bunches throughout the whole vein, but appears to be most abundant towards the north wall. Some years ago a crushing mill, washing machinery, and smelting furnace were erected, and between one and two thousand tons of ore mined; but, after crushing and washing, only five per cent, of galena were obtained, although trials on a small scale are said to have indicated from twelve to fifteen per cent. This, and indeed most of the lead-bearing veins of Ontario, are probably of the same age as those of Rossie in New York State. They are more recent than the Laurentian, as they cut the rocks of both the Potsdam and Calciferous formations. In the Laurentian their greatest dimensions and largest content of galena seem to be attained where they traverse crystalline limestones, and in the alternating gneisses and diorites, the galena is often replaced by blende, copper pyrites and other minerals.-Calciferous formation. Nuggets and grains of native silver have been found in washing for gold in almost all parts of British Columbia, the largest being obtained in the Omineca gold district on a branch of the Peace River. A nugget from this district analysed by Messrs. Riotte & Leckhardt of San Francisco contained, silver 83.30 per cent., mercury 11:00, lead 0·40, copper 0-20, besides traces of gold, platinum, and iron. Alluvion. |