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Those too large to be entirely included in one exposure are filmed beginning in the upper left hand co-ner, left to right and top to bottom, as many frames as required. The following diagrams illustrate the method: Un des symboles suivants apparaitra sur la dernidre image de cheque microfiche, selon le cas: le symbole — *- signifie "A SUIVRE ", le symbole V signifie "FIN ". Les cartes, planches, tableaux, etc., peuvent e a golden mine, which is very probable." The stone he alludes to is the trap associated with the Triassic sandstones of the Jiay of Fundy ; copper is found scattered through it in small grains and lumps, but has not yet been found in work- able quantity. Although this trap resembles that from the famous Lake-Superior copi)er-di8trict, the zeolites and other minerals cha- racteristic of the Nova-Scotia trap are wanting in the Lake-Superior I rap ; and on no ground, so far 1 am aware, can any equivalence of age bo established. Passing over without notice the numerous unsuccessful attempts that have been made to open productive copper- mines in Uj)por and Lower Carboniferous strata, wo find tliat the eas' n part of the province gives the best indications of permanent deposits. On reference to the accompanying geological map of part of the province (p. 750), based on the map prefixed to the second edition of Dr. Dawson's 'Acadian (leology,' it will be seen that the northern part of Nova Scotia is traversed longitudinally by a band of strata of Fpper and Lower Silurian age, higher in geological sequence than the auriferous measures of the Atlantic coast, and covered at one point by a narrow band of Lower-Car])()nit'erous age. In this Silurian series, and pursuing a general east-and-west course, are numerous large bands of granites, reddish syenites, in ]tlaces eonipG.-.ed of red felspar, hornblende, porphyry, compact felspar, and diorites, with asli. c^c. Pursuing a course rougldy j'arallel to these bands is a tolerably well-defined series of large fractures, extending from Parrsboro to the Fast lliver of Pictou, and thence to (juysboro. The course of this line of disturbance is marked by nietamorphic action, ores of iron and cojq)er, and by dykes and masses of diorite, &c. From Pai-rsboro to Londonderry valuable Itrown haematite deposits are tound, with micaceous and sjiecular ores, goethite, &c., running loO Or E. OILPIN OX SOME RECENT DISCOVKRIKr*. ■\ L 9^ s-^ ^ OF COPPKR-ORK, IN NOVA SCOTIA. 761 '\ -4 east and west (astr.). At Londonderry coppor-pyritca is found in the iron vciuH in Hmall quantity, and also at Five Islands, ausoeiated with liof.vy spar. On the Salmon River, near Tru^o, very pure carbonate and grey sulphurct of copiKir are found, probably, however, owin}? to organic matter. On the head-waters of the Middle River arc veins of spe- cular ore and limoiiite ; continuing to the east a few miles, a vein of specular ore is met running east and west, and 20 feet wide in jdaces. This vein has l)0('n traced for about three miles, and, nlthough no fossils have yet been found in its vicinity, is generally considered to bo in strata of the same age as the liondonderry ore. Following the line to the eastward, the iron ores are now chiefly spathic and micaceous, forming the gangue for copper-pyrites. About five miles eastward of the large vein of micaceous ore above referred to, the first traces of copper-pyrites a'j met, which are repeated in a small vein on the east branch of t'lC St. Mary river. The copper de])osits now attain their greatest development near Lochabcr and Poison's Lakes ; and the traces continue to be found for miles to the eastward. On the Salmon River the Primrose pro- perty shows a small vein, which was tested to some extent a few years ago, and contains very rifh copper-ore. From analyses made by Dr. Jiayes, State Analyst, Roston, U. S., the ore contained from 37 t'' 30 per cent, of copper, and was composed of copper-pyrites and embescite. Finally, near Guy.s|)oro, specular ore of very fine (juality occurs, but is not yet ])rov('d to be of economic value. Specimens of native copper in diorite(?) have been brought to me from this district; but 1 have no detailed information respecting it. At Lochabcr Lake, where a great deal of work has been done, the deposits ajipear to be of unusual value, and are being prepared Jov mining-operations. The deposits form a series of veins, cutting at oblique angles black and rod shales and (juartzites, and thrown for a short distance 30° out of an cast/-and-west course by a dyke, apparently a diorito con- taining talc and serpentine. The first vein met going east is about 2 feet wide. I have no details of its contents. The second vein, 80 feet distant, has been proved to a depth of 85 feet ; it varies in width from 5 feet 6 inches to () feet 3 inches, and holds about 20 per cent, of copper-pyrites evenly distributed in talcose slate, greenstone and quartz, and mica- ceous iron-ore. The third vein, 216 feet distant, is from 1 foot 6 inches to 2 feet wide, and holds copper-pyrites, with embescite in bands, with quartz and talcose greenstone. The fourth vein, 130 feet distant, is about 5 feet wide, and carries about 10 per cent, of rich o with much quartz. The fifth and sixth veins arc respectively 50 and 150 feet further east ; they are each 3 feet wide. These leads also contain large percentages of ore, but have not yet been examined. In these last .<*(K».'-^ I'mrnirmittimmr ^^ wa (52 V. OILPIN ON SOME RKCRKT D18C0VKR1ES the micaceous ore Ltis been to some extent repluced by carbonate of iron, which is the chief ganj^uo of the Poison 's-Iiako ore. The sixth vein is gradually returning to its east-and-weat course ; and at a further distance of 300 yards it has been oiwned again, and proved to bo 4 feet inches wide ; and nearly half a mile to the east, on the strike of the vein, two small veins have been found holding very good ore, and large boulders proving the passage of tho larger veins. The course of the cupriferous bn,nd has been traced, by surface- indications, from this point, about four miles, to ]*olson's Lake, whore, during the past summer, a very fine vein of spathic ore, holding (•oj)per-pyrites and a little iron-pyritos, was traced for several hundred feet through dark blue and olive slates. Its width varied from to 11 feet ; and its course was about N. 70° W. (astr.). Dr. Dawson gives the average of copi)er in this ore at 10-8 per cent. ; I should judge from samples shown me that it is considerably higher. The age of the strata holding these deposits is not yet clearly settled. Dr. Honeyman, in a Geological lie])ort to the Provincial (lovemraent, stated that tho Poison's- and Lochaber-Lako strata were of Devonian age. From following the line joining the copi)er and iron districts, it will at once api)oar, on mapi)ing the exposures and strikes, that these measures are on the same geological horizon as those holding the limonite and micaceous ores of the East and Middle Itivcrs of Pictou. These latter measures, both at the East River of Pictou and at the (!obe(|uids, are overlain by strata of Lower-Helderberg age. On the other hand they are readily referred to a later age than the auriferous rocks of the Atlantic coast. No fossils have yet been found clearly defining their position ; and, in the absence of a reliable geological survey, tlioy may be provisionally considered as filling a place near the middle of the Silurian strata. The metamorphism of this range of iron- and copper-bearing strata would appear to have taken place before the commencement of tho Lower Carboniferous epoch ; for we find conglomerates and shales of that age deposited around diorite dykes on the East River, and the former holding pebbles identical with the ore-bearing slates. The date of the filling of the fissures with ores does not appear equally certain ; for the Lower Carboniferous sandstones and lime- stones, which in places overlie the ore-strata, frequently contain small veins of specular ore, which, with magnetite, also occurs in the fissures of the Triassic trap. The quality of the Lochaber ore is unusually good ; the chief variety met is copper pyrites with a small admixture of carbonate of copper and embescito. The gangue at Lochaber is chiefly mica- ceous iron-ore, with a little spathic ore ; at Poison's Lake exclusively the latter, which yielded on assay 3o jier cent, of iron. An average of the large veins gave, on analysis by Dr. How, of Windsor : — m.~-M. . :£!^LL.^-