SEG - Society of Economic Geologists

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22 SEG NEWSLETTER No 91 • OCTOBER 2012 Presenters… SEG-CSM Sediment-hosted Zn-Pb-Ag Deposits Course SEG Course Center, Littleton, Colorado, USA 8–9 November, 2012 This workshop will present an overview of sediment-hosted Zn-Pb-Ag ores from syngenetic and diagenetic environments to high temperature carbonate replacement with a strong emphasis on exploration. The workshop will focus on clastic-dominated (SEDEX), Mississippi Valley-type, sandstone-hosted, salt diapir environments and high temperature polymetallic vein and carbonate replacement deposits. The course will review the origin of the ore fluids, metal solubility, transport and precipitation mechanisms, igneous associations, and alteration. Pre - sentations on the ge ologic and tectonic controls on their distribution in the Earth’s crust through time will provide in sight into where and how sediment-hosted Zn-Pb-Ag deposits form and the implications for exploration. Classic sediment-hosted Zn-Pb-Ag deposits will be described and samples of ores and alteration products from around the world will be available for the participants to examine. Registration after September 30, 2012: Members (US$ 595), Non-Members (US$ 695), SEG Students (US$ 295), Non-member Students (US$ 345) Register at www.segweb.org/events#12RBASEMET David L. Leach (SEG 1979 F) worked for the US Geological Survey for more than 30 years and is pres - ently a consultant to the minerals industry. He has authored or co authored more than 200 papers on the ge - ology and geochemistry of ore deposits and is a recognized expert on sediment-hosted base metal de posits. His career focused on hydrothermal mineral-rock interactions with special in terest on Mississippi Valleytype and CD (SEDEX) Pb-Zn deposits, ore formation in metamorphic environments, global metallogeny and deposit targeting using global geodynamics and secular distributions of ore deposits. David Leach also conducted research at the University of Paris VI as a High Level CNRS Visiting Scientist, at the Univer - sity of Western Australia as a Gledden Research Fellow and is currently active as an Adjunct Professor at the Uni versity of Western Australia and Honorary Professor at the Chinese Academy of Geo science. He served as President of SGA and was a SEG International Exchange Lecturer. He received a Meritorious Service Medal from the United States Department of the Interior and in 2010, received the Penrose Gold Medal from the Society of Economic Geologists. Peter K.M. Megaw (SEG 1982 F) Consulting Exploration Geologist Presi - dent of IMDEX/Cascabel and co-founder of Min era Cascabel and MAG Silver. His Ph.D. work at the Uni - versity of Arizona was an exploration-fo cused geological/geochemical study of the Santa Eulalia Ag-Pb-Zn Dis - trict, Chihuahua and Carbonate Replace - ment Deposits (CRDs) in general. He has published extensively on CRDs and is a frequent speaker at international academic and technical symposia. His primary exploration foci are CRDs, Epi thermal Vein Deposits and Porphyry Cop per Deposits and he and his team are credited with the significant discoveries at Juanicipio-Fresnillo, Zacatecas; Platosa, Durango; and Cinco de Mayo-Pozo Seco, Chihuahua. Peter was awarded the Soci - ety of Mining Engineers 2012 Robert M. Dreyer Award for excellence in Applied Economic Geology and the Carnegie Min eralogical Medal for 2009.
OCTOBER 2012 • No 91 SEG NEWSLETTER 23 The reserve estimates that form the basis for final feasibility studies leading to the construction of a mine are, to a greater or lesser degree, almost invariably wrong. Unfortunately, the error is in only one direction. The tonnage of ore mined may exceed the tonnage predicted by the “feasibility re - serve,” but the grade of ore actually mined is almost invariably lower than the grade envisioned in the feasibility study. As a re - sult, the financial profitability of the operation very rarely meets the feasibility forecast. This course is NOT a course in financial evaluation or geostatistics, although both of these subjects are discussed, nor is it a collection of “cookbook” recipes for reserve estimation. It is intended as a dis - cussion of various aspects of re - serve estimation that are often neglected in the real world, and which contribute to the above situation. Various exercises, mostly based on actual operations, are presented to illustrate points important to the evaluation of any mineral deposit. The course will be of interest to geologists dealing with the practical aspects of reserve estimation and mining engineers, as well as to decision-makers in economic geology in general. Course materials will include a copy of the latest edition of SEG’s consistently well-received Special Publication Number 3 Ore Reserve Estimates in the Real World, by John G. Stone and Peter G. Dunn. Early Registration (until Oct. 31, 2012): Members (US$ 995), Non-Members (US$ 1,095), SEG Students (US$ 595), Non-member Students (US$ 645) Late Registration (after Oct. 31, 2012): Members (US$ 1,095), Non-Members (US$ 1,195), SEG Students (US$ 645), Non-member Students (US$ 695) Ore Reserve Estimates in the Real World Three-day Workshop — November 28–30, 2012 SEG Course Center, Littleton, Colorado, USA PRESENTERS JOHN G. STONE John G. Stone received his undergraduate training at Yale University, and a PhD degree in economic geology from Stanford University. Following graduation, he joined the Hanna Mining Company as a staff geologist, and for the next 30 years served in various positions in exploration and mine geology, project management, mine development and financial analysis of new and existing mining ventures. In 1979 he was named manager of Hanna’s Pilot Knob operation in Missouri, and from 1982 until 1989 served as Chief Geologist, Mineral Resources. During the course of his career, he has been involved with the exploration, evaluation, development or management of direct shipping, “taconite” and volcano genic iron deposits, porphyry copper, copper-zinc VMS, magmatic copper-nickel, MVT leadzinc, epithermal vein and disseminated gold, nickel laterites, and placer gold and gold-diamond deposits. He has worked in Canada, Mexico, Guatemala, Venezuela, Colombia, and Brazil. PETER G. DUNN Peter G. Dunn received a B.S. degree in geology from Yale University in 1955 and started work as a mining engineer at Miami Copper Company in Arizona. He received an M.Sc. degree in mining geology from Stanford University in 1958 and subsequently migrated to Australia where he worked for the Australian Bureau of Mineral Resources and Mount Isa Mines. After returning to the United States he worked in both North and South America, Australia and Asia for Kennecott, Quintana Minerals, Chevron Resources and as a consulting geologist in porphyry copper exploration and property evaluation. Please note that this course is limited to 30 participants. SEG reserves the right to cancel this event should minimum attendance numbers not be met by October 31, 2012. Register at www.segweb.org/events#12RSEGORE. Ore Reserve Estimat i Special Publication Number 3 Special Publication Number 3 FOURTH EDITION Ore Reserve Estimates in the Real World Feasibility Study & Mining Report Prefeasibility Study Geological Study FEASIBILITY AXIS F 1 2 3 Economic Potentia ly Economic Intrinsicaly Economic 3 2 1 ECONOMIC AXIS E John G. Stone and Peter G. Dunn SOCIETY OF ECONOMIC GEOLOGISTS, INC. 111 1 Detailed Exploration General Exploration Prospecting Reconnaissance 2 3 4 GEOLOGICAL AXIS G
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