Mining News. A RICH PIECE OF STONE. FROM IMPERIAL TREASURY CLAIM (TARARU). ASSAY VALUE OVER £10,000 PER TON. WHY REMAIN DEAF ?

Te Aroha News, Volume VII, Issue 428, 14 December 1889, Page 2

Mining News. A RICH PIECE OF STONE. FROM IMPERIAL TREASURY CLAIM (TARARU). ASSAY VALUE OVER £10,000 PER TON.

WHY REMAIN DEAF ?

On Saturday evening Mr R. Harris, Te Aroha, received from the Te Aroha S. and G. Mining Company's office the result of the assay of a piece of quartz from the above claim, showing it to te most remarkably rich in both gold and silver. We have seen the Assay Certificate of which, the following is a copy :— The Te Aroha Silver nnd Gold Mining Company (Limited). > Certificate of Assay. Waiorongomai, New Zealaud, December 7th, 1889.

Assayed by James Napier. These are ihe largest returns of Gold and Silver values per ton ever determined

from crude ore in tins office. Wm. Adams, June., Acting Manager.

The str ne giving the foregoing extraordinary rich return, it is stated was selected from the best of a parcel of about 181bs, which, together with a second parcel of about 94-1 bs,-w?.s brought lo Te Aroha from the Imperial Treasmy last week for treatment. The parcel of stone referred to we are informed was broken out from a drive (in about 30 feet) on the main reef; the reef at this point being about 2tfc, 6iu. wide, The Imperial Treasury is a Licensed Holding of 10 acres situated at Upper Tararu, Thames, and was taken up by the following (about nine months a^o), who arc the present owners: Messrs R. Harris, Jas. H. Ilowe, Jas. Don, J. Bew, and W. McClear.

The following Returns from two small parcels of ore, about lOlbs each, from the Imperial Treasury, were received by Mr R. Harris on Tuesday evening :—: — (Copy of Certificate of Return ) Te Aroha S. and G. Mining Co., Lim. Waiorongoroai, Dec lOth, 1889. Herewith are returns for two lots of ore deposited with us for treatment from Imperial Treasury :—

The weight of crude ore treated in No. 1 was lOlbs, ami yielded 8 oz. of concentrum, or equal to 5 per cent of the original weight returned in concentrates. That is to say twenty tons of such ore would yield one ton of concentrates of assay value :

Value of oneton oFconcentrates produced from twenty tons ore. As a check on this work take the crude ore :

In values at L 4, and 3* per oz., Ll 6s, and 2s BJ. Total, LI 8s Bd.

( >r about 90 per cent of assay value, a" demonstrated by comparing a=say value iof crude ore ami tailings, should be <»nvp'] in concentrates. From the ber>l;tn amalgamation of about SOlbs of tailings, 70 grains retort was produced, yielding about 53 grains gol 1 bullion, valued about £2 18s per oz. Lot 2 was evidently panned down by your associate too close, as the residue of concentrates only weighed loz , being the product from lOlbs crude ore, or about GlOth of one per cent concentrated. According to this test it would take 1 00 tons to produce one ton of . iventratesr, the value of which would be ; "i 5 ! 4s ll'i, or about 160 tons of crui"e ore at !£24s 5d per ton saved. As the assa^ value of the crude ore was: —

per ton, it would show that about 92* par cent of the assay value of the crude ore was produced in the concentrates. These mechanical or hand concentrating tests demonstrate that jour ore will concentrate well, and we advise you to, as promised, have bulk samples tested in our works of not less than 0110 ton in each lot. Wm. Adams, Junr., Acting Manager,

Memo, December 31th, 1880, Regarding the statement that 301 bs of tailings voided 53 grains gold bullion valued at L 2 JBs per oz., we beg to state that this should have read that 30lbs of similar crude ore, treated in the Berdans, yielded as above, ani not tailings. This other lot of ore was of a much higher grade, such a yield demonstrating that it was worth at least L 26 per ton. The concentrating returns from this ore will ■. be submitted under Schedule of Lot 3. The small samples submitted to us for actual treatment cannot be taken as an average of your mine, and when we come to treat the promised larger bulk simples through our Battery and over the concentrating tables, together with subsequent berdan or pan amalgamation, a more thorough knowledge, for all practical purposes, of the character and general values of your ores will be obtained.

Te Aroha Silver and Gold. Mining Company, Limited. Superintendent's Office, Waioiongomai, New Zealand, December 12th, 1889. Mr R. Harris and associates, — Lot 3. — Regarding the treatment of Lot 3, Gold Ore from the " Imperial Treasury Mine, we beg to hand you our returns a& below. The gross weight of Lot 3 crude ore ( deposited with us for treatment aggregated 40 lbs ; from which an average sample of lOlbs was concentrated by hand and gnve ; the following returns: —

Value of Concentrates per ton £1039 10 10 No. of tons of such Crude Ore necessary to produce one ton of concentrates 20 Per cent of wei^htConcentrated^ per cent. 20 tons of Oie at 67 per cent of Assay Value, or at £53 9s 9d £1069 15 0 Check on treatment as above, or assay value of I ton conceniiatou £1039 10 10 The subsequent amalgamation of the other portion of this ore, aggregating 80lbs, at the Milling Plant, yielded 2oz amalgam ; 70 grains retoit ; 53 grains gold bullion. Or equal to a saving in berdan treatment of about £26 per ton. From this duplex treatment we can guarantee a savin? of fully 85 per cent of the assay value of such ore, by crushing, concentrating 1 , and pan amalgamation. Our charges for the treatment of such an ore would be 103 per ton for crushing and concentrating, 4s per ton for pan amalgamation, and we would pay you 75 per cent of assay value of the corcentiales ; and 20 tons of such ore should net you about ¥m. Adams, Jtjni., Acting-Manager. [Above we publish further Returns from Imperial Treasury (Tararu) ore, treated at the Te Aroha Silver and Gold Mining Oo.'s reduction works, Waiorongomai. We also k -publish the Raports respecting ore from this mine that appeared in our issue of Wednesday last, and direct the special attention of our readers thereto, for the following reason : A portion of the Report (commencing " 20 tons" etc., and ending li each lot," (as now scmewhat separated from the rest of the lv.port by a blank space above and below), was published in an incorrect and misleading foim in Wednesday's issue. The mistake occurred as follows : The Report was brought to our office at a very late hour on Tuesday evening, in order that we could take a copy and have it published in Wednesday's News. We pointed out to Mr llanis at the time when giving us the Report that a purtion of it (viz., that now particularly referred to) was not at all in accord with (he rest of the Report, in fa^fc thaf it wag to all intents and purposed unintelligible. In reply Mr Harris said he did not understand that part of the Report iiim?elf, hut I stated it was just as he received it ; ! and expressed a wish tlmt it ghnnM appear in our issue next morning, as fho Returns were bein^ looked for wit'i interest. We therefore published tlm Repoit exactly as it was supplied to us. And now as to how the mistakeoccurred : The Returns and Repoit furnished to Mr Harris wore written on three sheets of paper, ordinary Ceitificdte of Assay forms, having the usual nnmb<T of riiled columns, headed oz=. dwfc. gts., etc ; but unfortunately the sheets of paper were not numbered, and got transposed by Mr Harris after he opened the letter. The Report on No. 1 Lot occupied a sheet ami a half of paper, the Report on Lot 2 being wiitten ou another sheet of paper altogether, propei ly number three sheet. The bottom half of what was really tho second sheet (completing the Report on Lot No 1) being left blank, was, owing 1 to Mr Harris inadvertently transposing the sheets after he opened the letter, as already explained, mistaken by him for a foot note, was given to us as such, and consequently appeared altogether out of its proper place in the publishe d Report. Further, owing to this mistake the figures that referred to pounds shillings and pence, being written across paper ruled for andheaued oz. dwts. and grs., were given to us as referring to 02. dwts. and grs ]

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Gold 07.9 per ton 2578 Silver 3or ton 986 dwt grs 14 3 10 16 value £JO,3H 16 6 „ 148 1 1 Totcil value per ton £10,462 17 7

Imperial Treasury. ' The samples of Gold Ore deposited by Mr Harris for assay I hereby certify to contain :—: —

07, dwt, gr. oz.dwt.gr. IrudoOre, Gold 19 12 oPilverß 3 7 loncentiates „257 816 „ 65 8 8 '••"lings „ ClO 16 „ 6 7 9 r a!ue of Crude Ore per ton £79 12 5 » „ Tailings „ 26 2 8 „ saved in Ooncentiates £53 9 9 per ton l er Cent „ ' „ 67 per cent

ASSAY MEMORANDUM.

Gold Silver oz. dwt. gr. 0 16 8 0 16 88. £ 8. d. 2 5 4 0 2 5 total in i erold and silver £2 7 9

!Oton crude oie at £1 8s 8! value of I ton cone titrates, as per mechanical cnncentiaiin^ le^t £ 8. 28 13 25 0 (1. 4 7

05!. dwfc. RT. OZ. Clwt. gl . GoM 0 8 3 silver 2 13 21 nd dedu'jfc tlie vnhie of the tailings 0 1 15 1 15 21 'ul ma cnvoH OfiT> 018(1

Gold Silver oz.dwt. gr. 4 I 16 at £4 pevoz. 57 19 16 at 3s per oz. £ s- d. 16 6 8 8 13 II

(a old per ton t oz, dwt. &r. Jo. 1. Crude oie 0 8 3 „ Concentrates 4 1 16 „ Tailings 0 1 15 Jo. 2. Odds ore 0 16 8 „ Conccntiates 88 4 0 „ Tailings 0 3 6 Silver per ton oz. dwt. gT, 2 13 21 57 19 16 1 15 22 0 16 8 16 6 16 0 9 18