$25 – $2,000

Geology of Hydrothermal Ore Deposits

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Colorado School of Mines

Berthoud Hall - Room 243

1516 Illinois Street

Golden, CO 80401

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Note: We have five different categories of tickets for both the whole event and individual classes depending on whether you are a Professional (Non-SEG/SGA Member); Professional (SEG/SGA Member); Non-Mines Student (Non-SEG/SGA Member); Non-Mines Student (SEG/SGA Member) or a Mines Student. Please choose your ticket(s) appropriately.

Click here for the instructors' bios.

Thursday, January 3 - VMS Deposits with Dr. Thomas Monecke

Submarine hydrothermal systems represent one of the oldest and most important ore-forming processes in the geologic record. This course will examine the diversity of hydrothermal systems and the nature of fluid flow in submarine volcanic environments, with an emphasis on the formation of volcanogenic massive sulfide deposits. The geological characteristics of these base and precious metal deposits and the hydrothermal processes that produce them will be discussed. Special emphasis will be placed on the interpretation of geological settings, controls on mineralization, ore mineralogy and geochemistry, hydrothermal alteration, and enrichment of precious metals. Strategies for exploration in ancient volcanic terrains will be derived.

Friday, January 4 - Orogenic Gold: Geology, Geochemistry, Genesis, and Exploration Criteria with Professor Richard J. Goldfarb

This module will provide a comprehensive overview on the geology of and exploration for orogenic gold deposits, the most widespread type of gold deposit globally. It will provide descriptions of the most important Precambrian and Phanerozoic examples of orogenic gold ores formed in the world’s young accretionary orogens and old cratonic greenstone belts. Topics to be covered include tectonic and structural controls, geological characteristics, geochemical and geophysical signatures, geochronological relationships, and exploration strategies. A large component of the program will be the detailed description of gold metallogenesis in the North American Cordillera. Other gold deposit types with some overlapping features, particularly intrusion-related and Carlin-type gold deposits, will be compared and contrasted to indicate what type of resources are the most favorable targets for the explorationist in various provinces.

Saturday, January 5 - Sediment-Hosted Zn-Pb-Ag Ores:Mississippi Valley-Type (MVT) and Clastic Dominated (CD) with Dr. David Leach

This course will present a global overview of sediment-hosted Zn-Pb-Ag ores from the syngenetic and diagenetic environments to high temperature burial and tectonic settings. The focus of the workshop will be on Mississippi Valley-Type (MVT), evaporite-related ores and Clastic Dominated (CD) deposits (also called SEDEX). Examples of deposits in the world's classic districts will be presented to illustrate the diversity of ore styles. The course will review the origin of the ore fluids, metal solubility and transport and precipitation mechanisms. Presentations on the geologic and tectonic controls on the distribution of these ores in the Earth’s crust through time will provide insights into where and how sediment-hosted Zn-Pb-Ag deposits form. The workshop will discuss the recent advances in understanding the fundamental geological controls for these ores that provide new exploration opportunities. The attendees will have opportunity to examine samples from important world deposits.

Sunday, January 6 - Skarn and porphyry deposits with Professor Zhaoshan Chang

Skarn and porphyry deposits are some of the largest ore deposits in the world but can be complicated in the field. This one-day short course is designed to help explorers understand skarn and porphyry deposits with common sense exploration concepts and easy to apply mineralogical guides. The course will clarify the basic concepts and terminology, explain the current understanding of skarn-porphyry forming processes, and examine the relationship and transition between skarn and porphyry deposits. The focus will be on the zonation patterns that are useful in exploration with a discussion of how the zonation pattern varies in different environments.

Monday, January 7 - Epithermal processes and products: Alteration, ore, and exploration to the tops of porphyry deposits with Dr. Jeffrey W. Hedenquist

A century ago Lindgren defined the epithermal environment as reaching to about 1 km depth, below a paleosurface that can include silica sinters. This overview examines the processes and resulting characteristics of: 1) the epithermal paleosurface, both in acidic magmatic-hydrothermal and neutral pH geothermal settings, 2) alteration zonation associated with different styles of precious and base metal epithermal deposits, 3) the transition to the tops of porphyry copper-gold deposits in volcanic arcs, and 4) features that provide guidelines for exploration and assessment.

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Colorado School of Mines

Berthoud Hall - Room 243

1516 Illinois Street

Golden, CO 80401

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