Hellman & Schofield : Publications

H&S ... Technical specialists to the minerals industry

Hellman & Schofield - Publications

Following is a list our publications. Contact us at » or use our Info Request form if you would like a hard copy of one of the papers listed below posted to you. Please state the full title of the paper.

Note that due to copyright laws some of these papers may not be available for distribution by us directly. For most of the papers below we do have copyright permission from the publisher or 'author courtesy copies' and we can usually supply the paper directly. We are currently obtaining permission from the publishers for all of the papers listed. Either way we will let you know if your request for a particular paper can be fulfilled by us and If not then will advise you which publisher or source to obtain the publication from. Your patience and understanding is appreciated.

Grade Control Optimisation

	Schofield N.A. 1995: Recoverable Resource Models and Optimization. OPTIMIZING WITH WHITTLE - a symposium on the application of optimization methods to open pit mining, Perth, Western Australia, March 13-14, 1995.
	Schofield N.A. and Rolley P.J. 1997: Optimisation of Ore Selection in Mining: Method and Case Studies. – Third International Mining Geology Conference, November 10-14, Launceston, Tasmania, p93-97.
	Schofield N.A. and Johnson N. 2000: An Introduction to the Optimisation of Grade Control Practices (this in an internal confidential document available to our clients upon written request, click here to contact us )

Quality Control / Exploration

	Hellman, P. L., 1997: Avoiding disappointment: the application of basic good scientific practice to the exploration, evaluation and the auditing of mineral deposits. Assaying and Reporting Standards Conference, AIC Conferences, Singapore 10-11 November, 1997.
	Hellman, P. L., 1999: Issues concerning the quality of assay results. In Good Project - Wrong Assays! Getting Sample Preparation and Assaying Right". Seminar sponsored by MICA, AIG and AusIMM - Monday 26 July, 1999.
	Hellman, P. L. and Situmorang, T., 1986: Geochemical exploration for economic mineral deposits in West Sumatera and North Sumatera, Republic of Indonesia. Indonesian Mining Association, Jakarta.
	Hellman, P. L., 2001: Mineralogical and geochemical studies - key elements in evaluating nickel laterites. ALTA 2001 Nickel/Cobalt-7. Technical Proceedings. ALTA Metallurgical Services.

Resource Estimation Studies

	Schofield, N.A. 1988: Ore reserve estimation at the Enterprise Gold Mine, Pine Creek, Northern Territory, Australia. Part 1: structural and variogram analysis. CIM Bulletin vol.81, No.909, p.56-61.
	Schofield, N.A. 1988: Ore reserve estimation at the Enterprise Gold Mine, Pine Creek Northern Territory, Australia. Part 2: the multigaussian model. CIM Bulletin vol.81, No.909, p.62-66.
	Schofield, N.A. 1990: Estimation of Underground Mining Reserves using Conditional Simulation: The Porgera Gold Deposit, Papua New Guinea. Proceeding of Pacific Rim Congress 90 vol.3, p.493-498.
	Carswell, J. and Schofield, N.A. 1993: Estimation of High Grade Copper Stope Grades, QTS North, Cobar Mine, Cobar NSW. AusIMM Proceedings, Vol. 298, No.2, Nov 93.
	Schofield, N.A. 1993: Determining Optimal Drilling Densities for Near Mine Resources. Applications of Computers in the Mineral Industry, E.Y. Baafi editor, University of Wollongong, Oct 1993.
	Schofield, N.A. 1990: Injecting geological uncertainty into resource estimation: the Porgera gold deposit, Papua New Guinea. Gondwana: Terrains and Resources, Tenth Australian Geological Convention, Abstracts vol.25, p.117.
	Schofield, N.A. and Rolley P.J. 1992: Use of Indicator Kriging and 3D Geological Modelling for Ore Resource Estimation at Marvel Loch Open Pit Gold Mine, Western Australia. Eleventh Australian Geological Convention Abstract, January 18-25, Ballarat, p313-314.
	Schofield N.A. 2000: Ore Definition at the Henty Gold Mine Tasmania. In, Proceedings of the Fourth International Mining Geology Conference, Coolum Queensland, The AusIMM, Publication Series No 3/2000, p207-214.

Mine Reconciliation

Schofield N.A. 1998: The Myth of Mine Reconciliation. In, Mine to Mill Conference, AusIMM, October 11-14, Brisbane, Queensland, p87-92.

General Geostatistics

	Schofield, N.A. 1992: Mineral Resource Mapping Methods and Algorithms: A Discussion of their Strengths and Weaknesses. AusIMM Annual Conference, Broken Hill, May 17-21, p.33-37.
	Schofield, N.A. 1992: Using the Entropy Statistic to infer Population Parameters from Spatially Clustered Sampling. Proceedings of the Fourth International Geostatistics Congress, Kluwer Academic Publishers, Holland.
	Leonte D. and Schofield N.A. 1995: Evaluation of a Soil Contaminated Site and Clean-up Criteria: A Geostatistical Approach. Geostatistics for Environmental and Geotechnical Applications, ASTM STP 1283 (in Press), R. Mohan Srivastava, Shahrokh Rouhani, Marc. V. Cromer and A. Ivan Johnson, Ed., American Society for Testing and Materials.

General Geochemistry

	Green, T. H. & Hellman, P. L., 1981: Fe-Mg partitioning between coexisting garnet and phengite at high pressure, and comments on a garnet-phengite geothermometer. Lithos, 17, pp 253 - 266.
	Hellman, P. L., 1980: The geochemistry and phase chemistry of the spilite-tholeiite, Bhoiwada Section, Bombay Island, India. In Deccan Volcanism and related basalt provinces in other parts of the World. Memoir Geol. Soc. India, 3, pp 434 - 459.
	Hellman, P. L. and Green, T. H., 1979: The role of sphene as an accessory phase in the high-pressure partial melting of hydrous melting of hydrous mafic compositions. Earth Planet. Sci Letters, 42, pp 191 - 201.
	Hellman, P. L. and Green, T. H., 1979: The high pressure experimental crystallisation of staurolite in hydrous mafic compositions. Contrib. Mineral. Petrol., 68, pp 369 - 372.
	Hellman, P. L. and Henderson, P., 1977: Are rare earths mobile during spilitization? Nature, 267, pp 191 - 201.
	Hellman, P. L. and Henderson, P., 1977: Geochemical and stratigraphic evidence against an oceanic crust interpretation for the Tumut "greenstone" occurrence. J Geol Soc Aust, 24, pp 215 - 218.
	Hellman, P. L., Smith, R. E. and Henderson, P., 1979: Rare earth element investigation of the Cliefden Outcrop, N.S.W., Australia. Contrib. Mineral. Petrol., 65, pp 155 - 164.
	Hellman, P. L., Smith, R. E. & Henderson, P., 1979: The mobility of the rare earth elements: evidence and implications from selected burially metamorphosed terrains. Contrib. Mineral. Petrol., 71, pp 23 - 44.

General Mineralogy

	van der Heyden, A. and Edgecombe, D. R. 1990: Silver-Lead-Zinc Deposit at South Mine, Broken Hill. In Geology of the Mineral Deposits of Australia and Papua New Guinea, F. E. Hughes, Editor. The Australasian Institute of Mining and Metallurgy, Melbourne.
	Birch, W. D. and van der Heyden, A. 1988: Minerals from the Kintore Open cut, Broken Hill, New South Wales. Mineralogical Record, 19(6), 425-436.
	Birch, W. D. and van der Heyden, A. 1997: Minerals from the Kintore and Block 14 open cuts at Broken Hill, New South Wales. Australian Journal of Mineralogy, 3(1), 23-71.
	Birch, W. D, Stockman, P. and van der Heyden, A. 1999: Secondary Uranium Minerals from the Ranger Mine, NT. Australian Journal of Mineralogy, 5(3)

Other

Hellman, P.L., 1976: Structural analysis of the Albury District. J. Proc. Roy. Soc. Aust. 109,
pp 103-113

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