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II. The Miners News
<br />Nature's Complex Forms of Gold
<br />by Orvie Zimmerman It ha, long been a question by many assayers as to the metals are ut a free metallic (vrnl. The second type of article states that larger amounts of silver are used as an
<br />whether or not gold comes in if form that will not respond metal ore was called Rudis where file metals are not in a free added collector for the precious metals. The use Of a nitrate
<br />to standard analytical methods. Many assayers stake if very' form. The Mining Journal, by Malcom Maclaren, title Gold chloride roast prior to dissolving the precious metals with
<br />broad statement, when they sav if it will not fire assay then it Its Geological Occurrences And geographical Disn ibution, aqua regia. There arc many more methods described in this
<br />probably does not contain any gold. I would like for them to London 1908, This has an article that describes that gold book that are used to assay ores that are complex.
<br />study some ofihe historv of (.'ripple Creek before it became comes in an ionized totem, and needs the right amount ;%n article from the California Mining Journal by a great gold producing area. of negative ions to mix with the positive ions to become J.P. Sawyer, Consulting Geologist WCS1 Sussex, [:mgland.
<br />personally knew two of the guys that worked for metallic. Canadian Bulletin G.S.C.'SU describes gold ions This article speaks of case histories of the problem, with
<br />Cioldeu Cycle Corporation. One of the; guys gave me the flux are complexed with hydrous oxides of iron and manganese the standard fire assay. and the problems with the most
<br />For fire assaying ores that contain the mineral tellurium. He that can not be seen with the highest optical microscope. sophislicated instrument, in the world on testing some
<br />,aid [hat the tellurium in some samples was high, and would These gels after setting for very long period; will release gold ores. \Vhat firm IN the gold that is found in the ocean caUSC a total loss of gold. the gold where it can be seen. The Alkaline Sulphide Theory water? One would think it would he a chloride because of
<br />he mineral tellurium and also selenium have what is of Gold Deposition, by F.Gordon Smith. (Fmplovee of the high content of salt it contains. it probably is complexed
<br />called if wetting action tilt the cuppell, A CUppcll is designed International Nickel) Here in this report gold wits dissolved with chloride,, but the main complex caul not be a true gold
<br />to absorb the lead and leave the precious metals on the in complex poly sulphide .solutions. When trying to remove chloride. If' it was a simple gold chloride, then someone
<br />surface. When the minerals telluriwn and selenium are the gold from this solution with precipitating agents they would be mining it. The change in ch or ph and metals
<br />e•ollecled in file lead with the precious metals, the wetting failed. They found that upon standing fir long periods of higher on the periodic chart will precipitate the gold from action causes all the metals to be absorbed into the cuppell time the gold would gradually come out of the solution, at chloride solution. Some of the metals like zitic. copper.
<br />A standard fire assay flux contains from 40 to Ell grams of The way the cold was recovered from the solution iron, aluminum are examples of metals used in precipitating
<br />litharge, and tellurium and selenium containing ores use is very interesting. The complex polysulphide solution gold from chloride solutions. A resent blind test by the
<br />ISO grants of litharge fir each assay. The ,IS Government containing the gold was pill into a test tube and rusty iron BLM proved that the skills of' fire assaying were in verb
<br />tested ores from Idaho that contained mercury, and found w•ai added and then put into an iron container and sealed, short supply in America. The Bl_M made 66 samples of mnl
<br />that mercury also g.avc problems when fire assaying. Then the iron container was sealed and then the oxygen that contained known amounts of the metals and sent them I talked to an assaver that worked on the Carlin gold inside the container was removed by purging it with another out to o6 labs advertising "fire assay "services for mining.
<br />project in Nevada with the so called invisible gold, He said gas. After the iron container was heated for several hours They found that 80% failed to conic; close to the correct
<br />he mixed a composite sample and split it into 11 separate it was allowed to cool. On opening the iron container a big yalucs. Recently new infonnation has been reported that
<br />samples to he fire assayed. When he received the result: surprise was present, the upper part of the test tube looked the precious metals are found in nature nS micropaionc lc~
<br />from all the different assayers, only out of the l 1 found like it had turned to an opal like material. The rusty iron had and nanoparticles. The rrcciou, rnctals will not respond cold. Ores that contain arsenic, antinony and sulphide changed to pyrite and the gold that was in solution was in to fire assay or wet chemical assay or instrument type ,t
<br />minerals roust be fluxed different. crystal form in the bottom of the test tube and also in the assay. Repeated experiments by laboratories using electnm
<br />I saw an example in a laboratory in Arizona, when the bottom of the iron container where the solution must have microscope (SEMI and TEM) in the United States and
<br />assayer removed the lead button from the slag. 'rhe sample boiled out of the test tube. Canada and South Africa have documented precious and
<br />contained a fair amount of sulphur, and was collected with Here is an example of an ion exchange; the rusty iron other metal nanopartieles in nature. Laboratories that h;n c
<br />the lead forming what is called Spiess. When this happens (hydrous oxide of iron) gave the oxygen to the solution in confirmed this information, (Geological Survey of C'anad.t. the lead button is brittle and will not cuppell. Ores that exchange for the sulphur from the polysulphide, and formed Calgary AB), (Geological Survey of Canada, Ottawa;
<br />contain pyrites (iron and sulphur)or other sulphur containing pyrite. There was nothing for the gold to complex with so Oil).. (Lac Minerals Limited, Denver olorado),(Cannict.
<br />minerals need if nitrate added to the assay tie oxidize it dropped from the solution in crystalline metallic form. Ottawa On).,( Cannon Microprobe, Seattle Wa.),(Anllcl,
<br />the sulphur. A report by F.R.Archibadd titled, Roasting Analytical Chemistry of the Platinum Metals, a Russian London Oat)., ( [)urban University, South .Africa),( Alberta
<br />Arenical (told (res. The arsenical gold was roasted with report describes analytical problems that are encountered Geological Survey. Edmonton AB), (U Manitoba; Ramnath, sodium carbonate to liberate the gold. It was discovered that with neutron ,tcti~;aion %e ihCn u,cd in a,,: yang pier, lou, 3. S. Tirc,i.~), ~'1-' C'alg:u T,anj;_ NISI The:,..
<br />alter roasting this complex and quench cooling while the metals. \\'hen some ores that contain gold and the platinum Another report describes that if company mined gold
<br />ore was still hot, 94"0 of the gold in the ore dissolved and group metals are fire assayed there are problems of collecting from a deposited in South America ( Minas Gcras Area) 111.11
<br />staved in solution. Standard precipitating agents would not all the metals in the first assay. This article states that the contained the rare earth minerals, This company reported that
<br />drop the gold Isom the solution. It was discovered that a slag from the first firing is refired sometimes several times gold recoveries from their operations were very high. They
<br />positive charged mineral salt of manganese would drop the to collect all the metals. (lid not save the rare earth minerals from this first operation. gold from the solution. 1 can tell you that this reassaving of the slag is not a They returned to this same area several years later to recover
<br />The book DeRaMelallica describes native ores where standard procedure that is used in most laboratories. This the rare earth minerals. They reiciyed a surprise when IlwN
<br />see L1N9MERNIA'N on next page...
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