TEST OF HIKUTAIA ORES

Te Aroha News, Volume V, Issue 229, 19 November 1887, Page 2

TEST OF HIKUTAIA ORES

The following u the result; of a tost of Hikutaia silver ore, completel by Messrs Frasor and {Sons at thrir establishment in SUulejrsfcreet: — No. 1 tee) r by threot pan amalganjatiop, the assay per ton yielded : oz d«r(i gr Bullion fttt 6 h Crold 8 18-16. — £16 9 10 Silver 101 16 0 = fO H £35 16 10

The r«i urn of bullion \$ jjgsjv) \tms 6a B^-1 per ounce. The trenttarnt of 12 cwt 2qr 81b raw ore, less 16 per cent, for moisture, und 501 h for hajr* aucl a?aa< i, by direct pan amalgamation, v -elded as iollowr* ; —

Bullion por ounce, fis JPd. A treatment of half a ton of ore by ditee\ pun amaltfuujutiion loaukel in a yul.l o," 220r. Ghvt lpgib, or bullbn \alued at Qi lljd per ounce.'' The as^vß of tailings of lOcwt le treated, yiililod 2lozodsvfc Bgvs, and scwt Oqis 91b of dried tailings chlorodiscd in rcverbatory furnace and treated by pan amalgamation, returned 4oz lodwt bullion, -he yield on aasay being 240?; slwt Bgrs, or nearly 80 per cent, and 9 per cent, on the original assay. The ;'i«<.'ay of phmea of taihnga gave a return of 4902; to the ton, and sc\vr lqr 61b net shines ; or, allowing 30 |>er cent, for moiatuie, 4151b dry, treated to direct pan amalgamation and chemical test,yiel t 4oz 9dut bullion, the return on the assay being 49 per cent. The bullion in the last of the tc3ts ha 3 only been compmed by weight, and not v.due, and the following figmes ma y B uic * c tliC comparisons: — Total b.illion o»/t lined, including tailings, 60 per cont. oi assay ; made up, by direct pan amalgamation, 42.3 per cent. ; chloloclised tailings, 9 per cent. , shines, 8.4 p. r cent. fO he original assay of 105oz 8 Iwt 16«r showed that" the stuff contained 57<>z sdwt of chlorides and sulphates, which, under caieful treatment, could bo obtained by direct pan anmlga'iiafcion, The remainder (48oz 3>lwt 16gr) contained the metallic and a lar^e percentage of aulphi lea, the latL/r not being iree to amalgamate. Makf^-SrU duo allowances for cleaning up of tailings and losses in hundliu^, etc, it wasfouni that the ore under this tiean^oiit S'.ff^red n 10--.s of at least 4<ope l> Ct-nt., wli'ch is principally constituted of sulphides, and which would require a chlorodising loastiug in or.'tr to be taved. A test of u L 'Wt la now being proceeded with, the stuff bemg tirst uoate i to a chlo?odising loastlng Hnd then to pan -amalgamation. A further t.ial of the raw ore will also be giveu uu ler .soaiowhftt snmliar treatment, and an impro\ement in the result ia anticipated. — HeruU.

Bullion Sold 3ilrer oz clwt fir 03 0 0 1 17 9 »» £8 0 61 0 15 10 4 i'lO .4