75 ways to recover gold!

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75 GOLD RECOVERY METHODS

To download each gold recovery method, click each link:

      biochemical methods of recovering gold:
   - bioleaching – 1980s research in Wales and California.
   - biooxidation – 1980s research in British Columbia and California.
   - gold-binding proteins – 2000s research in Washington State.
   - phytomining – 2000s research in New Zealand.

      oleophilic methods of recovering gold:
   - agglomeration – 1980s research in Australia and China.
   - oleophilic adhesion – 1980s research in Alberta.
   - froth floatation – 1930s research in Idaho and USSR.
   - gold-paraffin floatation – 1990s research in Brazil using candle wax.

magnetic methods of recovering gold:
- magnetic coated gold – 1980s research in Colorado with iron carbonyl.

gravitational methods of recovering gold:

      gold sluices - some are able to catch very fine gold
   - riffled sluices – 1960s-1970s research in China and USSR.
   - flat bar riffles – 1980s research in Yukon, 1990s in Mongolia.
   - angle-iron riffles – 1980s research in Canada.
   - expanded metal grating riffles – 1980s research in Canada.
   - expanded metal mesh riffles – 1980s research in Canada.
   - McCann’s small sluice – 1980s research in California.
   - Damn Fine Sluice – 1990s research in New Mexico.
   - Popandson sluice – 2000s research in USA.
   - Loewen electrostatic sluice – 2000s research in Alberta.
   - Cleangold® sluice – 1990s research in Oregon.
   - hydraulic riffles – 1980s research in New Zealand and Canada.

      gold jigs - recover nuggets as well as some fine gold
- simple jigs – 1970s research in China.
   - Pan-American (PAN-AM) duplex jig – Alaska tests.
   - Cleaveland/IHC jig – 1980s research in USA and Holland.
   - Gekko in-line pressure jig (IPJ) – 1990s research in Australia.
   - Kelsey centrifugal jig – 1980s research in Australia.

      gold centrifuges - rather good at catching very fine gold
   - Knudsen bowl – Alaska tests.
   - Gilkey bowl – Alaska tests.
   - Neffco bowl – 1970s research in Utah.
   - Yunxi bowl – 1960s-90s research in Yunnan.
   - Knelson bowl – 1980s research in British Columbia. Knelson concentrator
   - Falcon C bowl – 1980s research in British Columbia. Falcon concentrator
   - Falcon SB bowl – 1990s research in British Columbia. Falcon Superbowl
   - Itomak bowl – 1990s research in Novosibirsk. Itomak concentrator
   - Younge horizontal centrifuge – 1980s research in British Columbia.
   - Axzia-Mozley MGS centrifuge – 1980s research in Cornwall. Multi-gravity sep.

      gold helix - thanks to Archimedes screw
   - helix wheel (gold wheel) – 1900s research in Colorado.
   - helix cylinder – 1980s research in British Columbia.
   - helix belt – 2000s research in Canada and USA.

      gold tables - old devices, getting better
   - Wilfley shaking tables – 1890s research in Colorado.
   - shaking tables – 1960s-1970s research in China.
   - shaking tables – 1960s research in USSR.
   - BGS shaking table – 1990s research in UK.
   - Gemeni table – 1980s research in Colorado.
   - U-Tech reverse polarity table – 1990s research in Arizona.
   - Goltron machine – 1990s research in Utah.
   - Bartles-Mozley orbital tables – 1970s research in Cornwall.

      pinched sluices - very useful, especially as a cone
   - pinched sluice – historical usage.
   - Reichert cone – 1960s research in Australia.

      gold spirals - quite good at catching fine gold
   - Humphrey spirals – 1940s research in Colorado.
   - Mark-7 Reichert spirals – 1980s research in USA.

      elutriated sludge tanks - not jigs, and maybe better!
   - Duke E-tank – 1970s research in Georgia.
   - Graefe E-tank (Keene Hydromatic Jig) – 1980s research in California.
   - Pyramid E-tank (Pyramid Jig) – 1990s research in California.

      elutriation towers - remarkable at catching fine gold!
- Lashley ASAT Elutriation tower – 1980s research in New Mexico.
   - Osterberg E-tower (Quick Gold Separator) – 1980s research in California.
   - reflux classifier – 2000s research in Australia.
   - Ecologic E-tower (Ecologic Concentrator) – 2000s research in New Zealand.

compound water cyclones - dewater or catch fine gold!
- Visman Compound Water Cyclone (CWC) – 1970s research in Yukon.

      vibrating belts (vanners) - may catch fine gold rather well!
   - Bartles crossbelt – 1970s research in Cornwall.
   - Lemmon vanner – 1980s research in the Yukon.

Where to find out more...

   - join the ALASKA GOLD FORUM, read the posts and post a question!
   - send us an EMAIL and we will be pleased to hear from you.
   - have a look at the references on gold recovery listed below.
   - IF YOU KNOW A METHOD TO ADD, PLEASE EMAIL US!.

List of References

1. Donald M. Hausen (2000). Characterizing the Textural Features of Gold Ores for Optimising Gold Extraction. Journal of Mining (JOM) volume 52, page 14.
Download: http://doc.tms.org/ezMerchant/prodtms.nsf/ProductLookupItemID/JOM-0004-14/$FILE/JOM-0004-14F.pdf?OpenElement
2. O.V. Zamyatin, A.G. Lopatin, N.P. Sammikova and A.D. Chugunov (1975). The Concentration of Auriferous Sands and Conglomerates. Nedra Press: Moscow. 260 pages.
(English translation is available from Geological Survey of Canada).
3. Wenqian Wang and George W. Poling (1983). Methods for recovering fine placer gold.
Canadian Institute of Mining and Metallurgy (CIMM) Bulletin, volume 76, pages 47-56.
4. Clive. J. Mitchell, E.J. Evans and Michael T. Styles (1997). A Review of Gold Particle-size and Recovery Methods. Technical Report #WC/97/14, Overseas Geology Series, British Geological Survey BGS, Keyworth, Nottingham, England, UK, 34 pages. Download: www.bgs.ac.uk
5/6. D.F. Stewart and P.W. Ramsay (1993). Improving the simple sluice box.
International Journal of Mineral Processing, volume 39, pages 119-136.
7. George W. Poling and James Frederick Hamilton (1986). Fine Gold Recovery of Selected Sluicebox Configurations. University of British Columbia. Prepared for Canada/Yukon Economic Development Agreement. Indian and Northern Affairs Canada; Northern Affairs: Yukon Region, iv +77 pages. Download: www.geology.gov.yk.ca/publications/tech/fine_gold_recovery_sluiceboxes.pdf
8. Randy Clarkson and Owen Peer (1990). An Analysis of Sluicebox Riffle Performance. New Era Engineering Corporation, Yukon. Report for the Klondyke Placer Miners Association. 31 pages.
Download: www.geology.gov.yk.ca/publications/tech/analysis_sluice.pdf
9. John M. West (1971). How to Mine and Prospect for Placer Gold.
Bureau of Mines publication, Information Circular #8517.
Read: http://imcg.wr.usgs.gov/usbmak/ic8517.html
10. Daniel E. Walsh and P. Dharma Rao (1988). A Study of Factors Suspected of Influencing the Settling Velocity of Fine Gold Particles. Mineral Industry Research Laboratory (MIRL) Publication #76: University of Alaska at Fairbanks, 52 pages. $5.00 from www.uaf.edu/sme/Mirlpub.html
11. P. Dharma Rao, David R. Maneval and Daniel E. Walsh (1984). Field Investigation of Hydrocyclones for the Recovery of Fine Gold, Phase III. June 1984, MMRRI Final Report. Mineral Industry Research Laboratory (MIRL), University of Alaska at Fairbanks. Publication OF 84-14, 96 pages. $10.10 from: www.uaf.edu/sme/Mirlpub.html
12. Eoin H. MacDonald, (1983). Alluvial Mining: The Geology, Technology, and Economics of Placers. Publisher: Chapman & Hall, Kluwer Academic Publishers, hardcover, 508 pages.
13. Robin Grayson (2006). Gold recovery in gold pans – the term ‘panning’.
World Placer Journal, volume 6, pages 1-21. Download: www.mine.mn
14. Robin Grayson (2006). Gold recovery in cones in Laos – the term ‘dulanging’.
World Placer Journal, volume 6, pages 36-41. Download: www.mine.mn
15. Robin Grayson (2006). Gold recovery in wooden trays in Russia – the term 'lotoking'. World Placer Journal, volume 6, pages 22-35. Download: www.mine.mn
16. Chimed-Erdene Baatar (2006). Gold recovery on mats in Mongolia – the term ‘matadoring’.
World Placer Journal, volume 6. Download: www.mine.mn
17. Chimed-Erdene Baatar (2006). Gold recovery in bowls in Mongolia – the term ‘bowling’.
World Placer Journal, volume 6. Download: www.mine.mn
18. Robin Grayson (2006). Gold recovery in buckets in Kyrgyzstan – the term ‘bucketing’.
World Placer Journal, volume 6, pages 42-51. Download: www.mine.mn
19. Peter W. U. Appel (2005). Small-scale mining – hazards and opportunities in Kyrgyzstan and Mongolia. Geological Survey of Denmark and Greenland Bulletin #7, pages 77-80.
Download: www.geus.dk/publications/bull/nr7/nr7_p77-80.pdf
20. Lars Hylander and Markus Meili (2005). The Rise and Fall of Mercury: Converting a Resource to Refuse After 500 Years of Mining and Pollution.
Critical Reviews in Environmental Science and Technology, volume 35, pages 1-36.
21. Marcello M. Veiga (1997). Introducing new technologies for abatement of global mercury pollution in Latin America. UNIDO/UBC/CETEM, Rio de Janeiro, 94 pages.
Download: www.facome.uqam.ca/pdf/veiga_01.pdf
22. Kristina Shafer, Lars D. Hylander and David Plath (2006). Novel solution to reduce or eliminate mercury pollution from artisanal and small scale gold mining. [ABSTRACT] Abstracts of 8th International Conference on Mercury as a Global Pollutant. Lancaster, PA, USA.
Download: http://opus.uu.se/publication.xml?id=88550
23. David Plath (2002). CleangoldTM in the Guianas. PowerPoint Presentation. 17 slides.
Download: http://casmsite.org/Documents/Salvador/33-Cleangold-Plath.pdf
24. Clive J. Mitchell, E.J. Evans and Michael T. Styles (1997). The design, construction and testing of a simple shaking table for gold recovery: laboratory testing and field trials. British Geological Survey (BGS) Report #WC/97/061, DFD contract #R6226, 27 pages plus Appendices.
Download: www.bgs.ac.uk/dfid-kar-geoscience/database/reports/colour/WC97061_COL.pdf
25. Michael Priester, Thomas Hentschel and B. Benthin (1993). Tools for Mining, Techniques and Processes for Small Scale Mining. GATE, Vieweg-Verlag, 537 pages.
View: http://sleekfreak.ath.cx:81/3wdev/CD3WD/APPRTECH/G10TOE/INDEX.HTM
26. Marcello M. Veiga, Randy F. Baker, Stephen M. Metcalf, Bern Klein, Gillian Davis, Andrew Bamber and Patience Singo (2006). Manual for Training Artisanal and Small-Scale Gold Miners: Removal of Barriers to Introduction of Cleaner Artisanal Gold Mining and Extraction Technologies. Global Mercury Project, United Nations Industrial Development Organization (UNIDO), 76 pages.
Download: http://web.uvic.ca/~gmp/documents/documents.htm
27. Weqian Wang (1979). A Study on Methods for Fine Placer Gold Processing.
Non-ferrous Metals (China), volume 4, pages 6-12.
28. Robin Grayson (2010).The Gold Miners Book – BAT Best Available Techniques for Placer Gold Miners. Eco-Minex International Ltd. 1,700 pages. Purchase: www.mine.mn
29. Baatar Tumenbayar, Minjin Batbayar and Robin Grayson (2000). Environmental hazard in Lake Baikal watershed posed by mercury placer in Mongolia.
World Placer Journal volume 1, pages 134-159. Download: www.mine.mn
30. Baatar Tumenbayar and Robin Grayson (2001). Mercury pollution in North Mongolia.
Abstract of 6th International Conference on 'Mercury as Global Pollutant' held in Minamata, Japan, 15-19th October 2001.
31. Baatar Tumenbayar (2003). Action Research on Mercury in the Boroo Area, Mongolia.
Japan International Cooperation Agency (JICA). 79 pages.
32. L. Kozin and V. Melekhin (2004). Extraction of Gold from ores and concentrates by leaching with the use of cyanides and alternative reagents. Publisher: MAIK Nauka Interperiodica. Russian Journal of Applied Chemistry, volume 77, pages 1573-1592.
33. Cleland N. Conwell (1980). Gold recovery from placer concentrates by cyanidation.
Alaska Division of Geological & Geophysical Surveys, Miscellaneous Publication #29, pages1-6.
Download: www.dggs.dnr.state.ak.us/pubs/
34. A.K. Williams (no date). Super Clorox. Prospector's Paradise website, San Pedro, Costa Rica.
View: www.prospectorsparadise.com/html/super_clorox.html
35. Rickford Vieira (2004). Mercury-Free Gold mining Technologies: Possibilities for Adoption in the Guianas. Technical Paper #1 by WWF-Guianas Regional Program Office, 8 pages.
Download: www.wwfguianas.org/technicalpapers/mercfreetech.pdf
36. Lars D. Hylander, David Plath, Conrado R. Miranda, Sofie Lucke, Jenny Őhlander and Ana T.F. Rivera (2007). Comparison of different gold recovery methods with regard to pollution control and efficiency. Clean, volume 35, pages 52-61.
37. Sidney Mahkatsi (2006). The iGoli mercury-free gold extraction method.
Paper presented to the Communities and Small-scale Mining (CASM Annual General Meeting, 11-15th November 2006 held in Antsirabe, Madagascar, 14 pages.
38. Sidney Mahkatsi and Rob Guest (2003). The iGoli mercury-free gold extraction process.
Urban Health and Development Bulletin, South Africa, volume 6, page 62.
39. Anon (2007). The iGoli mercury-free gold extraction process. Manuscript from Rob Guest of Mintek’s Small Scale Mining and Beneficiation Division (SSMB), 5 pages. www.mintek.co.za
40. Hiroyasu Murakami and Y. Nakao (2006). A trial of extracting gold from stream sediment and high Au/Ag ore using halogen-containing organic system. CCOP-GSJ/AIST-GAI CASM-Asia Workshop on the State-of-the-Art of Science and Technology to Protect the Environment and People, 27-29th November 2006, Bandung, Indonesia. PowerPoint presentation, 16 slides.
Download: www.dim.esdm.go.id/makalah/2006_murakami_CCOP.pdf
41. A.K. Williams (no date). Halide Leaching and Recovery.
Prospector's Paradise website, San Pedro, Costa Rica.
View: www.prospectorsparadise.com/html/leaching.html
42. Jinshan Li and Jan Miller (2006). A review of gold leaching in acid thiourea solutions.
Mineral Processing and Extractive Metallurgy Review, volume 27, pages 177-214.
43. Anon (2000). Gold Leaching using Thiourea.
View: www.e-goldprospecting.com/html/gold_leaching_using_thiourea.html
44. A.K. Williams (no date). Acids and Bases. Prospector's Paradise website, San Pedro, Costa Rica.
View: www.prospectorsparadise.com/html/acids.html
45. Marcello M. Veiga, Shefa Siegel, Patrick Schein, Cheick Santigui Camara, Joachim Dejean, Djibril Kamara and Amadou Diouf (2006). Technical Mission to the Artisanal Gold Mines in Upper Guinea. Blacksmith Institute and UNIDO Report, 13 pages.
Download: http://web.uvic.ca/~gmp/countries/guinea/Guinea%20Veiga%20Blacksmith%202006%20report%20v%204%20final.pdf
46. Anon (undated). The Poormans Method of Smelting Gold. Nuggethunter.
View: www.nuggethunters.org/Poormans-Smelting.html
47. Anon (undated). Smelting Gold. Nuggethunter.
View: www.nuggethunters.org/smelting.html
48. A.K. Williams (no date). Melting and Smelting. Prospector's Paradise website, Costa Rica.
View: www.prospectorsparadise.com/html/smelting.html
49. W. Motherwell (1914). Floatation Test at Mount Morgan. Min. and Sci. Press, 27th June issue, #53140.
50. H. Lang (1916). Black sand of the Pacific Coast. Mining Sci. Press, volume 3, pages 811-813.
51. Arthur W. Fahrenwald (1933). Floatation of Gold from River Sand and Black Sand. Min. J. (Phoenix, Arizona), volume 16, #23, 3-4.
52. Arthur W. Fahrenwald, J. Newton, W.W. Staley and R.E. Shaffer (1939). A metallurgical study of Idaho placer sand. Idaho Bureau of Mines and Geology, Pamphlet #51, 10 pages.
$2.50 from: www.idahogeology.org/products/
53. G.P. Slavnin (1936). Flotation of placer gold. Soviet Zolotoprom, volume 2, pages 49-54.
54. G.P. Slavnin (1938). Flotation of gold from concentrate tailings. Tsvet. Metal., volume 5, pages 46-49.
55. Tjoe Hauw Nio (1978). Mineral dressing by IHC jigs.
Paper in: Gravity Separation Technology; Papers presented at a Short Course on Gravity Separation Technology, held 13-17th October 1978 at the University of Nevada, Reno, USA. 64 pages.
56. Daniel E. Walsh, P. Dhoma Rao and Donald J. Cook (1987). Study of a Static Screen, Jig, Spiral and a Compound Water Cyclone in a Placer Gold Recovery Plant. Mineral Industry Research Laboratory (MIRL) Publication #73: University of Alaska at Fairbanks. 78 pages.
$10.00 from: www.uaf.edu/sme/Mirlpub.html
57. Michael Richard Mark Anthony (1986). Investigation and Evaluation of the Knudsen Bowl Concentrator. Phase II Report. State of Alaska Department of Natural Resources.
58. Michael Richard Mark Antony (1995). Laboratory and Field Testing of the Knudsen Bowl Concentrator. University of Alaska, Fairbanks, E.M. thesis, 64 pages.
59. William James Anderson (1975). Parameter Impact on the Performance Ability of the Centrifugal Forced Amalgamator. Mineral Industry Research Laboratory (MIRL) Contract Report MT-1: University of Alaska at Fairbanks, 97 pages. $10.20. Download: www.blm.gov/ak/jrmic/docs/usbm/cr/AuBeachSands/CR_AuBeachSands.pdf
60. Joseph Kuo-Hua Wang (1977). Centrifugal Amalgamation in Dredge Recovery Systems. Master of Science thesis, University of Fairbanks at Alaska. Mineral Industry Research Laboratory (MIRL) Contract Report MT-2: University of Alaska at Fairbanks, 73 pages.
Order: www.uaf.edu/sme/Mirlpub.html
61. Michael Silva (1986). Placer Gold Recovery Methods. California Department of Conservation, Division of Geology and Mines. Special Publication #87, 32 pages.
Download: www.consrv.ca.gov/cgs/geologic_resources/gold/SP87.pdf
62. O.V. Zamyatin and A.T. Konyukova (1970). Extracting various sizes of gold from sands on a concentrating table. Soviet Journal of Non-Ferrous Metals, volume 43.
63. B. Jeyadevan and G.K.N.S. Subasinghe (1989). The effect of solid parameters in a pinched sluice concentrator. Journal of Mineral Processing, volume 29, pages 31-50.
64. Þ.L. Ergün & S. Ersayýn (1998). Characterization of flow on a pinched sluice and its effect on separation. Chapter 8 in: Innovation in Physical Separation Technologies, Institute of Mining and Metallurgy London (IMM), pages 85-98.
65. Þ.L. Ergün and S. Ersayýn (2002). Studies on pinched sluice concentration: Part 1 – The effects of operating variables and sluice geometry on the performance of pinched sluices. Minerals Engineering, volume 15, pages 423-435.
66. Þ.L. Ergün and S. Ersayýn (2002). Studies on pinched sluice concentration: Part2 – Characterization of flow over a pinched sluice. Minerals Engineering, volume 15, pages 437-446.
67. D. Erik Spiller (1983). Gravity separation of gold – then and now. Paper presented at the National Western Mining Conference, held on 10th February 1983 in Denver, Colorado, 7 pages.
68. Thomas J. Ferree (1981). The Reichert cone concentrator, an innovation for a fine gold recovery system. Proceedings of the 3rd Annual Conference on Alaskan Placer Mining., held at Fairbank, Alaska USA.
69. M.G. Aylmore and D.M. Muir (2001). Thiosulfate Leaching of Gold - a Review. Minerals Engineering, volume 14, pages 135-174.
70. Jan Visman and N.E. Andersen (1975). Application of Compound Water Cyclones for the Processing of Placer Sand from Burwash Creek, Yukon Territory, Canada. Canada Centre for Mineral and Energy Technology, Energy Research Laboratories Report ERP/ERL #75 (CF) – 41 (IR), Department of Energy, Mines and Resources, Edmonton, Alberta, Canada, 120 pages.
71. Cecil Urlich (1985). Compound Water Cyclones: Recovery of Micron Size Precious Metals from an Ancient Beach Deposit at Sombrio Point, Vancouver Island. 5th Annual RMS-ROSS Seminar on Placer Gold Mining, Vancouver, British Columbia.
72. Daniel E. Walsh (1988). Evaluation of the 4-inch Compound Water Cyclone as a Fine Placer Gold Concentrator Using a Radiotracer Technique, A Thesis. Mineral Industry Research Laboratory (MIRL) Report #70, University of Alaska at Fairbanks, 260 pages.
$10.00 from: www.uaf.edu/sme/Mirlpub.html
73. Daniel E. Walsh and P. Dharma Rao (1988). Study of the compound water cyclone's concentrating efficiency of free gold from placer material. Canadian Institute of Mining Engineers Bulletin #? pages 53-61.
74. A.G. Lopantin et al (1971). In 1976, V.M. Man’kov and N.P. Sannikova published encouraging results of Soviet tests on placer gold recovery using “wide cone cyclones” (MIRL Report #70 by Daniel Walsh).
75. Chris Mills and R.O. Burt (1979). Thin Film Concentrating Devices and the Bartles-Mozley Concentrator. Mining Magazine, volume 141, pages 32-39.
76. Chris Mills (1978). Thin Film Concentrating Devices and the Bartles-Mozley Concentrator in Particular. Short Course on Gravity Concentration Technology, University of Nevada, Reno, October, 13 pages.
77. W. Kotze and F.W. Petersen (1998). The coal gold agglomeration (CGA) process to recover free gold. 17th Annual Mineral Processing Symposium, Cape Town, South Africa, 5-7th August 1998.
78. F.W. Petersen and W. Kotze (1998). Effect of operating parameters on the performance of the Coal-Gold-Agglomerate process. 4th International Conference on Clean Technologies for the Mining Industry held 13-15th May 1998 at Santiago, Chile.
79. F.W. Petersen and W. Kotze (1998). The use of coal-oil mixtures to recover free gold through agglomeration. Coal Indaba ‘98, Johannesburg, South Africa, 17-18th November 1998.
80. W. Kotze and F.W. Petersen (1999). Coal-gold agglomeration - a viable process for clean small scale mining. Paper submitted to Extraction Metallurgy Africa ’99, Johannesburg, South Africa, 1-2nd November 1999.
81. L.M. Moses and F.W. Petersen (2000). Flotation as separation technique in the coal gold agglomeration process. Minerals Engineering, volume 13, pages 255-264.
82. UDSM (2002). Progress Report for Project on Mercury-free Recovery of Gold (Coal Agglomeration Process - CGA). Chemical Engineering Department, University of Dar-Es-Salaam, Tanzania.
83. S. Sen, A. Seyrankaya and Y. Cilingir (2005). Coal-oil assisted flotation for the gold recovery. Journal of Minerals Engineering, volume 18, pages 1086-1092.
84. E.M. Coelho (1972). Floatation of Oxidized Copper Minerals: an Infrared Spectroscopic Study. PhD thesis, University of British Columbia.
85. E.M. Coelho and George W. Poling (1973). Spectroscopic studies of organic acid absorption on copper oxides and on gold. Paper presented at Colloid Symposium, Ottawa.
86. Randy Clarkson (1989). Gold Losses at Klondyke Placer Mines.
Gold Recovery Project (Phase 1). Report for Klondyke Miners Association. New Era Engineering, Yukon. 42 pages + Appendix of 2 pages and 19 figures. Northern Affairs Program, Whitehorse, Yukon.
Download: www.geology.gov.yk.ca/publications/tech/gold_loss.pdf
87. Randy Clarkson (1990). The Use of Radiotracers to Determine Gold Losses at Klondike Placer Mines. Report for Klondike Placer Miners Association. Northern Affairs Program, Whitehorse, Yukon. Download: www.geology.gov.yk.ca/publications/tech/the_use_radio.pdf
88. Randy Clarkson (1990). Evaluation of Yukon sluicing operations using radiotracer gold: KPMA Gold Recovery Project update. Pages 68-77 in: Cathy Farmer and Daniel E. Walsh (editors and compilers) Proceedings of the 12th Annual Alaskan Conference on Placer Mining. Held 22-24th March 1990 in Fairbanks, Alaska. Sponsored by: Alaska Women in Mining, Alaska Miners Association, Placer Miners of Alaska, and School of Mineral Engineering UAF, iv + 93 pages.
89. Randy Clarkson (1990). The use of nuclear tracers to evaluate the gold recovery efficiency of sluices. Canadian Institute of Mining and Metallurgy (CIMM) Bulletin, April 1994, pages 29-37.
90. Randy Clarkson (1990). Placer Gold Recovery Research, Final Summary.
Report for Klondike Placer Miners Association. Northern Affairs Program, Whitehorse, Yukon, 49 pages.
Download: www.geology.gov.yk.ca/publications/tech/placerrecovery.pdf
91. Charles H. McDonald (editor) (1990). Fine Gold Recovery of Selected Sluice Box Configurations. Report of Contract YEDA-MR-001, pages 1-11. Funded by the Canada/Yukon Economic Development Agreement (YEDA). Download: www.geology.gov.yk.ca/publications
92. Michael T. Styles, J. Simpson and E.J. Steadman (2002). Good Practice in the Design and Operation of Large Sluice Boxes. BGS Commissioned Report CR/02/029N prepared for DFID KAT Project R7120 ‘Recovering the Gold of the Developing World’, published by the British Geological Survey (BGS), 39 pages.
93. Mort J. Richardson (1984). The evolution and current application of the MKII Cleaveland Circular Jig to alluvial gold recovery. World Dredging & Marine Construction, July 1984.
94. Tjoe Hauw Nio (1985). Some aspects of gold recovery with IHC jigs.
IHC Holland NV. 16 pages + 11 pages of figures.
95. Tjoe Hauw Nio and Jack M. Donkers (1984). Mining and Recovery of Placer Minerals.
Pages 36-40 in: Daniel E. Walsh and M. Susan Wray (editors and compilers) Proceedings of the 6th Annual Conference on Alaskan Placer Mining. Held 28-29th March 1984 in Fairbanks, Alaska. University of Alaska at Fairbanks, Mineral Industry Research Laboratory (MIRL) Report #69, 77 pages.
$6.00 from: www.uaf.edu/sme/Mirlpub.html
96. Tjoe Hauw Nio and Henk van Muijen (1985). Notes on IHC jigs in gravity concentration.
IHC Holland NV. 12 pages.
97. Tjoe Hauw Nio (1988). IHC Jigs in Gravity Concentration. Paper presented at International Congress on ‘Dredge Mining Systems’ held 10-13th October 1988 at Baltimore, Ohio, USA. 41 pages.
98. Willem Kramer (1984). Alluvial Washing Plants. IHC Offers Floating and Shore-based Units for Dredge Mining Projects. World Dredging and Marine Construction, July issue, pages 20-22.
On request: www.ihcholland.com
99. Willem Kramer (1988). IHC Alluvial Mining Equipment for Efficient Dredging and Separation. Dredging and Port Construction, volume 25, 2 pages. Available on request: www.ihcholland.com
100. IHC Holland (1983). IHC floating and shore-based treatment plants.
Symposium on Dredging and Mining Technology. November 1983, Chapter M5. IHC Holland N.V. 8 pages + 19 pages of photos/figs. On request: www.ihcholland.com
101. IHC Holland (1983). Mineral dressing by IHC jigs.
Symposium on Dredging and Mining Technology. November 1983, Chapter M6. IHC Holland N.V. 32 pages + 5 pages diagrams and 11 pages photos. On request: www.ihcholland.com
102. IHC Holland (1991). IHC Jig Versus Other Gravity Separators.
Brochure published by IHC Holland N.V. 6 pages, reprinted from: Ports and Dredging #128.
On request: www.ihcholland.com
103. IHC Holland (1991). Gravity Separation for Gold Mining.
Brochure published by IHC Holland N.V. 6 pages. On request: www.ihcholland.com
104. IHC Holland (1997). Alluvial Mining Equipment. Brochure published by IHC Holland N.V. 6 pages.
On request: www.ihcholland.com
105. Henk van Muijen (1993). Some Innovating Development in Gold Mining with IHC Equipment. 1993 ISGMT, pages 1-9 plus 21 figures. On request: www.ihcholland.com
106. Gerrit Roelof Bazuin, Tsevel Delgertsoo and Robin Grayson (2001). Placer Gold Recovery in Mongolia with IHC trapezoidal sawtooth jigs. World Placer Journal, volume 2, pages 14-35.
Download: www.mine.mn
107. Del Ackels and James Madonna (1985). Placer Mining in Alaska with IHC jigs. On request:Alaskan Prospectors & Miners News. Fall Edition. 11 pages. On request: www.ihcholland.com
108. Del Ackels (1985). Some aspects of gold recovery with IHC jigs. On request:7th Annual Conference on Alaskan Placer Mining, March 1985. Mineral Industry Research Laboratory (MIRL), University of Alaska at Fairbanks.
109. Donald J. Cook and P. Dharma Rao (1973). Distribution, Analysis, and Recovery of Fine Gold from Alluvial Deposits. Mineral Industry Research Laboratory (MIRL) Publication #32. University of Alaska at Fairbanks. 101 pages. $5.00 from: www.uaf.edu/sme/Mirlpub.html
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