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BOURHOOD of ZEEHAN; VIZ. :-MACKINTOSH RIVER, MOUNT BLACK, MOUNT READ, MOUNT DUNDAS, MOUNT Zeehal'i', STANLEY RIVER, and MOUNT HEEMSKIRK

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BOURHOOD of ZEEHAN; VIZ. :-MACKINTOSH RIVER, MOUNT BLACK, MOUNT READ, MOUNT DUNDAS, MOUNT Zeehal'i', STANLEY RIVER, and MOUNT HEEMSKIRK REPORT ON THE PROGRESS OF THE MINERAL FIELDS IN THE NEIGH­ BOURHOOD OF ZEEHAN; VIZ. :-MACKINTOSH RIVER, MOUNT BLACK, MOUNT READ, MOUNT DUNDAS, MOUNT ZEEHAl'I', STANLEY RIVER, AND MOUNT HEEMSKIRK. Geological Surveyor's Office, Launees/on, 15t" May, 1895. SIR, . I HAVB the honOUT to submit the following Report on the ab!)ve fields, embodying the results of my obsenTatioTls during a short visit in the month:; of January and F ebruary last. To examine all these mineral localities wit.h any approach to thoroughness would taka a very long time, t~ur tv six months at least, and would require a large number of assays'and ana.lyses, a good deal of surveying, and the employment at times of more than a little manual labour in breaking ,iut ore and prospect­ ing. The number of mineral discoveries is !'IoO large and the extent of ground so great that I was unable in the time at disposal to do m()re than rUIl over the fields, and this R eport cannot therefore go into many details 8S to the mining properties visited, but will deal with th~m in a gener"l way, giving tbe res'lits of the impressions rAceived by me while burriedly lookin(!: over them. No doubt more complete investigatir.m wuuld in most cases modify these, and in submitting thi.:; H.~port I have to ask it to be taken with the foregoing explanation, and not to be regarded as the outcome of a thorough study of the variuus mineral occurrences. Tu avoid going a. !'econd time over ground already traversed, it sbould be read -with my previou. Reports on the <arne districts, of which the following have more or Ie~ bearing upon the matter ot' the pres~nt one :- . (I.) Report on the State of tbe Mining Industry on the West Coast, 25th April, 1890. (2.) Report on tbe progress of the Mount Zeeb"n ant.! Monllt' Dundas Silver-L.ud Fields, 25th .November, 1890. (3.) Report on .the. Country t.raversed by the Route of tbe proposed Waratah to Zeehan Hail wa v. 4th F ebruaT\', 1892. (4.) Report on the Progress of the Mineral Fields of tbe Coullty of MOlltngll, 20th May, 1M3. (5.) Report on the Country between ~Iole Cre,·" and the :lIount Dundas Silver F ,eld, 13th JUlie, 1893. (6.) Report UII the ClIrinna Goldfield, 9th April, 1894. Leaving the Burnie-t.o-Warattth raihvay at tht~ Hellyer crossing, or 40-mile statio!], on th e 15th January, a suutherly course was followed for about ten miles to the head of t.he Que River; this was all pretty level country of bas"Itie formation, purti"" of the Waratsh plateau, and very open, being easily traversed by horses. Towards the head of the Que the basalt disappears, and, as far as may be judged from occasional outcrops through the covering of "button-grass" and peal?' soil, the country rock is a scbist, most likely of Arch",an age; a similar schist is seen on Meredith s track from the junction of tbe Huskisson and Pieman rivers to Waratab, at a point considerably south of tbe Que River. Tbus far my route had lain only a little to the east of the surveyed route of tbe Waratah·to-Zeeban railway, but it now diverged to some miles east of the latter, fonowin~ the western edge of the Mackintosh vaney {or about seven miles through dense green "bush. ' wbicb migbt well be called jungle. The rocks noticed here were slates and sandstones similar to those of the Dnndas field, /lnd a huge dyke of serpentine penetrating these, met with some two miles after leaving the Que River, wade the resemblance of the geological structure of this district to that of Dundas still more close. The occurrence of similar slates, sandstones, and serpentines {urther south west on the track from Waratah. to Zeehan alon!!: the Huskisson ill"er has been previously Doted in my Report on tbe Route of the Waratah-to-Zeehan railway. All tbis district between the Huskisson and Mackintosb rivers being likely country fi>r silver-lead lodes, it de,erves more thorough prospecting, especially ~s it is comparatively easy of access from . Waratah. In one creek that was crosoed on my route a large quantity of barite (heavy spar) was noticed tbat most probably bad been broken away froUl a lode, and though no mineral of valne was seen with it, still its common association with such should encourage further exploration in the vicinity. MACKINTOSH RIVER DISTRICT. On the morning of the 16th January the Mackintosh Hiver was reached, at a poillt about three ... miles above the juuction uf tbe Sophia River with it. Here Mr. T. H. Farrell had a camp, and was engaged in opening up a deposit of Copper pyrites in a large croek runI1ing into the I\'Jackiil­ tosh from the north side. The di.covery is some 18 chains up the creek from its jUllction with the main river, and consiots of a number of veins of quartz and copper pyrites running through a light greenish coloured orgillitic schist rock., The general strike of the cOltntry rock is about N. 100 E., and the ruineral veins conform with tbis pretty closely. but at time. are seen to cross tbe lamin'" of tbe schist. I n a uistance of about a cbain up the creek-bed three or /i)ur veins of quartz from 12 incbes up to 30 inches in tbickn .... but of very variable size. have been oboerved, carryinll; a good deal of copper pyrites and .ometimes bltnches of pretty pure ore: a little malacbite and cuprite are at .times seen in the outcrop. Higher up the crpek about two chains anotber parallel vein of quartz about 18 inches tbick i. seen. also carrYing some copper pyrites, and there are ...veral otb~r small veins visible in t.he creek bed. The w'hole occurrence closely r ....mble. tbat of the Monnt R&d and Mount Black deposits. the argillitic Ichist rock being very similar. a. i. also the wanDer in whicb tbe pyrites occurs in it appareutly replacinll: parts of its substance. None or tbe veins up 'till 11011' laid bare are larg.e enough or ricb enougb to work. but there i. a considerable likelibood ~f there being. as at Mount Read and MOllnt Black. larger and more defined pyrites bodies to be found in the same belt of schist. and when tbe country becomes more accessible. tbis will be well wortb further pro.pecting. The pyrites in Farrell's find are said to carry botb gold and silver, but. owing to the unfortunate loss of a bag containing these and otber samples on my return from Zeehan, I am unable to quote ....ys of the ore taken for the purpose of testing. On ench side of the creek the spurs are capped with a deposit of river gravel. forming a terrace about 100 feet abo<o the level of the lIfackintosh River and 550 feet above sea level; this terrace runs for some distance alon!!, the north bank of the river, alld appears to agree in altitude witb a considerable extent of .graveI f1.ts seen on the south side in the Sopbia Hiver valley. In elevation these high gravels agree with some of those seen in tbe neigbbourbood of CorinOlL lower down tbe Pieman Valley. described in my Report on the Corinna Goldfield. in wbicb also is given an explana­ tion of the circumstances of their deposition •• hich goes far to account for the terraces higber up the river as well. Tbe stones in tbe gravel are ruostly granite, serpentine, metamorpbic .Iate, quartzite, and mica-scbist, derived from the older rocks of the upper Mackintosb b•• in; no gold has been yet lound in tbem. but little if any search has been made for it, and prospecting for alluvial gold i. recommended. Tbe tracing of Farrell's find along its strike is to a large extent prevented by this overlying covering of gJ'llvel. and to develop it furtber it will be necessary to drive into tbe spurs forming the sides of the valley. following tbe •.ourse or the ore-veins and crosscutting at inter.als. However, as the locality lies low down in the Mackintosh Valley. and i. at present very difficult of access. tbe prospects do not seem to me to justify much mining \York for some time to come . • . Should tbe railway from Waratah to Zeeban be constructed it would be poaoible 'tn get a road down from it to this place by following the valley of the creek in whicb tbe ore-veins have been found: tbis woulel not probably be more than 6 or 6 miles in length. and would bave a practicable gredient, and would be the wean. of opening up a region whicb promises well for ruture developments. About two miles eastward from the copper depusit tbere is a galena disoovery. on tbe south .ide of the Mackintosh on tbe Wbite Hawk C"""k, a large. branch of the Sol,bia River. An 80- acre section. 892-91>[, has here been granted to Mr. T. Farrell as a reward cl.im. anu the outcrop of the lode i. in tbe centre of it. A cut has beell made from the side of tbe creek across tbo lode showing it to be abour. six feet ill thickness, c(Jmpo~ed of soft iron oxide gogsan containing a. liule galena on the root wall. a band of shattered country limestone containing much calcite and a good deai of disseminated galena in tbe centre.
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