Matagami Zn-Cu Massive Sulphide Deposits

In the middle 1970s, my research interests shifted to volcanogenic massive sulphide (VMS) deposits at Matagami, Quebec, and elsewhere. Studies were made at the Mattagami Lake, Garon Lake, Radiore, Norita and Phelps Dodge mines.

Matagami volcanic stratigraphy was dissected in detail into tholeiitic, transitional and calc-alkaline sequences, and the paleostratigraphic and paleotopographic distribution of the VMS deposits were determined. The basis of research that led to the formulation of procedures for mass and volume change calculations in altered rocks was initiated at these deposits.

MacLean, W.H., 2000.

Calculation of the composition of fractionated solid as deduced from chemical profiles in tholeiitic lava.
Contributions to Mineralogy and Petrology, v. 139, p. 85-100.

Liaghat, S. and MacLean, W.H., 1992.

The Key Tuffite, Matagami Mining District: Origin of the tuff components, and mass changes.
Exploration and Mining Geology, v. 1, p. 197-207.

MacLean, W.H., 1988.

Rare earth element mobility at constant inter-element ratios in the alteration zone of the Phelps Dodge massive sulphide deposit, Matagami, Quebec.
Mineralium Deposita, v. 23, p. 231-238.

Kranidiotis, P. and MacLean, W.H., 1987.

Systematics of chlorite alteration at the Phelps Dodge massive sulfide deposit, Matagami, Quebec.
Economic Geology, v. 82, p. 1898-1911.

MacLean, W.H. and Kranidiotis, P., 1987.

Immobile elements as monitors of mass transport in hydrothermal alteration: Phelps Dodge massive sulfide deposit, Matagami.
Economic Geology, v. 82, p. 951-962.

Bonavia, F.F. and MacLean, W.H., 1986.

Geology and ore enrichment factors at the Radiore Mine, Quebec.
Mineralium Deposita, v. 21, p. 137-146.

MacLean, W.H., 1984.

Geology and ore deposits of the Matagami District.
Canadian Institute of Mining and Metallurgy, Special Volume 34, p. 483-495.

Bonavia, F.F. and MacLean, W.H., 1983.

Case History of the Radiore Mine.
Mineral Exploration Research Institute, Case History 1983-2, 32 pp.

MacGeehan, P.J., MacLean, W.H. and Bonenfant, A., 1981.

Exploration significance of the emplacement and genesis of massive sulphides in the Main Zone at the Norita Mine, Matagami, Quebec.
Canadian Institute of Mining and Metallurgy Bulletin, v. 74, p. 59-75.

MacGeehan, P.J. and MacLean, W.H., 1980.

Tholeiitic basalt-rhyolite magmatism and massive sulphide deposits at Matagami, Quebec. Nature, v. 283, p. 153-157

MacGeehan, P.J. and MacLean, W.H., 1980.

An Archean sub-seafloor geothermal system, ‘calc-alkaline’ trends, and massive sulphide genesis.
Nature, v. 286, p. 767-771.

MacLean, W.H. and Davidson, A.J., 1978.

Case History of the Bell Allard Mine, and a Study of the Key Tuffite, Matagami, Quebec.
Mineral Exploration Research Institute, Case History 1978-1, 55 pp.

MacLean, W.H. and MacGeehan, P.J., 1976.

Case History of the Garon Lake Mine. Mineral Exploration Research Institute, Case History 1976-1, 67 pp.

 

VMS Deposits of the Noranda District, Quebec

Liaghat, S. and MacLean, W.H., 1995.

Lithogeochemistry of altered rocks at the New Insco VMS deposit, Noranda, Quebec.
Journal of Geochemical Exploration, v. 52, p. 333-350.

Barrett, T.J. and MacLean, W.H., 1994.

Mass changes in hydrothermal alteration zones associated with VMS deposits of the Noranda area.
Exploration and Mining Geology, v. 3, p. 131-160.

Barrett, T.J., Cattalani, S. and MacLean, W.H., 1993.

Volcanic lithogeochemistry and alteration at the Delbridge massive sulfide deposit, Noranda, Quebec.
Journal of Exploration Geochemistry, v. 48, p. 135-173.

Shriver, N.A. and MacLean, W.H., 1993.

Mass, volume and chemical changes in the alteration zone at the Norbec mine, Noranda, Quebec.
Mineralium Deposita, v. 28, p. 157-166.

Barrett, T.J., MacLean, W.H., Cattalani, S. and Hoy, L., 1993.

Massive sulfide deposits of the Noranda area, Quebec. V. The Corbet mine.
Canadian Journal of Earth Sciences, v. 30, p. 1934-1954.

MacLean, W.H. and Hoy L.D., 1991.

Geochemistry of hydrothermally altered rocks at the Horne Mine, Noranda, Quebec.
Economic Geology, v. 86, p. 506-528.

Barrett, T.J. and MacLean, W.H., 1991.

Chemical, mass and oxygen isotope changes during extreme chloritization and sericitization of an Archean rhyolite, Noranda area.
Economic Geology, v. 86, p. 406-414.

Barrett, T.J., MacLean, W.H., Cattalani, S., Hoy, L. and Riverin, G., 1991.

Massive sulfide deposits of the Noranda area, Quebec. III. The Ansil Mine.Canadian Journal of Earth Sciences, v. 28, p. 1699-1730.

Barrett, T.J., Cattalani, S., and MacLean, W.H., 1991.

Massive sulfide deposits of the Noranda area, Quebec. I. The Horne Mine.
Canadian Journal of Earth Sciences, v. 28, p. 465-488.

 

Immobile Elements and Mass Change Calculations

The basic principles of these methods of determining element immobility (inertness) and calculating mass changes were outlined in studies at Phelps Dodge VMS at Matagami, and enlarged on in later years at Noranda and elsewhere.

MacLean, W.H., Bonavia, F.F. and Sanna, G., 1997.

Argillite debris converted to bauxite during karst weathering: Evidence from immobile element geochemistry at the Olmedo deposit, Sardinia.
Mineralium Deposita, v. 32, p. 607-616.

MacLean, W.H. and Barrett, T.J., 1993.

Lithogeochemical techniques using immobile elements.
Journal of Geochemical Exploration, v. 48, p. 109-133.

Shriver, N.A. and MacLean, W.H., 1993.

Mass, volume and chemical changes in the alteration zone at the Norbec mine, Noranda, Quebec.
Mineralium Deposita, v. 28, p. 157-166.

Barrett, T.J. and MacLean, W.H., 1991.

Chemical, mass and oxygen isotope changes during extreme chloritization and sericitization of an Archean rhyolite, Noranda area.
Economic Geology, v. 86, p. 406-414.

MacLean, W.H. and Hoy L.D., 1991.

Geochemistry of hydrothermally altered rocks at the Horne Mine, Noranda, Quebec.
Economic Geology, v. 86, p. 506-528.

MacLean, W.H., 1990.

Mass change calculations in altered rock series.
Mineralium Deposita, v. 25, p. 44-49.

MacLean, W.H., 1988.

Rare earth element mobility at constant inter-element ratios in the alteration zone of the Phelps Dodge massive sulphide deposit, Matagami, Quebec.
Mineralium Deposita, v. 23, p. 231-238.

MacLean, W.H. and Kranidiotis, P., 1987.

Immobile elements as monitors of mass transport in hydrothermal alteration: Phelps Dodge massive sulfide deposit, Matagami.
Economic Geology, v. 82, p. 951-962.

 

Other VMS Deposits

Barrett, T.J., MacLean, W.H. and Tennant, S.C., 2001.

Volcanic sequence and alteration at the Parys Mountain volcanic-hosted massive sulfide deposit, Wales, United Kingdom: applications of immobile element lithogeochemistry.
Economic Geology. Volume 96, p. 1279-1305.

Barrett, T.J. and MacLean, W.H., 1999.

Volcanic sequences, lithogeochemistry, and hydrothermal alteration in some bimodal volcanic-associated massive sulfide systems.
In: Volcanic-Associated Massive Sulfide Systems: Processes and Examples in Modern and Ancient Settings (C.T. Barrie and M.D. Hannington, editors). Reviews in Economic Geology, Volume 8, p. 101-131.

MacLean, W.H., 1994.

Lithogeochemistry of volcanic rocks and VMS alteration zones in greenstone belts.
Short Course Notes, CIM Geological Society. Field Conference, Sudbury, Ontario, September 1994, 19 p.

Barrett, T.J. and MacLean, W.H., 1994.

Chemostratigraphy and hydrothermal alteration in exploration for VHMS deposits in greenstones and younger volcanic rocks.
In: D.R. Lentz (Editor), Alteration and Alteration Processes Associated with Ore-Forming Systems. Geological Association of Canada, Short Course Notes Volume 11, p. 433-465.

 

Montauban Ores, Grenville Province, Quebec

These are highly metamorphosed and recrystallized volcanogenic Pb-Zn-Cu ores in sediments and volcanics (including pillow basalt) of Mid-Proterozoic age.

Bernier, L.R. and MacLean, W.H., 1993.

Lithogeochemistry of a metamorphosed VMS alteration zone at Montauban, Grenville Province, Quebec.
Exploration and Mining Geology, v. 2, p. 367-386.

Bernier, L.R., Pouliot, G. and MacLean, W.H., 1987.

Geology and metamorphism of the Montauban North Gold Zone: A metamorphosed polymetallic exhalative deposit, Grenville Province, Quebec.
Economic Geology, v. 82, p. 2076-2090.

Stamatelopoulou-Seymour, K. and MacLean, W.H., 1984.

Metamorphosed volcanogenic ores at Montauban, Grenville Province, Quebec.
Canadian Mineralogist, v. 22, p. 595-604.

MacLean, W.H., St.-Seymour, K. and Prabhu, M.K., 1982.

Sr, Y, Zr, Nb, Ti and REE in Grenville amphibolites at Montauban-les-Mines, Quebec.
Canadian Journal of Earth Sciences, v. 19, p. 633-644.

Stamatelopoulou-Seymour, K. and MacLean, 1977.

The geochemistry of possible metavolcanic rocks and their relationship to mineralization at Montauban-les-Mines, Quebec.
Canadian Journal of Earth Sciences, v. 14, p. 2440-2452.

 

Ni-Cu-PGE Magmatic Ores

This early research dealt with ore genesis and exploration techniques for Ni-Cu-PGM magmatic ores. It involved phase equilibrium of immiscible sulphide ore-forming liquids in magmas, and partitioning of base and precious metals into the sulphide liquids from surrounding magma.

Hoffman, E. and MacLean, W.H., 1976.

Phase relations of michenerite and morenskyite in the Pd-Bi-Te system.
Economic Geology, v. 71, p.1461-1468.

MacLean, W.H., 1969.

Liquidus phase relations in the FeS-FeO-Fe3O4-SiO2 system, and their application to geology.
Economic Geology, v. 64, p. 865-884.

MacLean, W.H. and Shimizaki, H. 1976.

The partition of Co, Ni, Cu and Zn between sulfide and silicate liquids.
Economic Geology, v. 71, p. 1047-1057.

Shimizaki, H. and MacLean, W.H., 1976.

An experimental study on the partition of zinc and lead between sulphide and silicate liquids.
Mineralium Deposita, v. 11, p. 125-132.

 

Kenya - The Migori Gold Belt

This project involved D. Ichangi’s PhD research on an Archean greenstone belt containing the Macalder mine (a VMS deposit) and many small gold mines.

Ichangi, D.W. and MacLean, W.H., 1991.

The Archean volcanic facies in the Migori segment, Nyanza greenstone belt, Kenya: stratigraphy, geochemistry and mineralization.
Journal of African Earth Sciences, v. 13, p. 277-290.





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