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Activity

2024

• LARGE, GEM-QUALITY PRIMARY SAPPHIRES FROM THE FRENCH BAR SILL, MONTANA: IMPLICATIONS FOR THE ORIGINS OF ALLUVIAL MISSOURI RIVER SAPPHIRE
  T164 Gem Minerals, Localities and Geological Significance
  Tuesday, 24 September 2024

  8:00 AM - 12:00 PM

  207A

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2018

• MAGMATIC FRAGMENTATION OF SAPPHIRE XENOCRYSTS IN A BASALTIC TRACHYANDESITE SILL NEAR HELENA, MONTANA
  T110 Gemological Research in the Twenty-First Century—Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals (Posters)
  Monday, 5 November 2018

  9:00 AM - 6:30 PM

  Halls J-K
• UNRAVELING THE GEOLOGICAL MYSTERIES OF MONTANA'S SAPPHIRE DEPOSITS
  T110 Gemological Research in the Twenty-First Century—Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals (Posters)
  Monday, 5 November 2018

  9:00 AM - 6:30 PM

  Halls J-K

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2016

• SAPPHIRES FROM AN EOCENE SILL NEAR HELENA, MONTANA
  T254 Gemological Research in the Twenty-First Century: Characterization, Exploration, and Geological Significance of Diamonds and Other Gem Minerals (Posters)
  Tuesday, 27 September 2016

  9:00 AM - 6:30 PM

  Exhibit Hall E/F
• MONTANA — A SAPPHIRE ANOMALY
  9 Mineral Deposits and Metallogeny of Western North America (Posters)
  Wednesday, 18 May 2016

  8:00 AM - 6:00 PM

  Clearwater Room

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2015

• GLASSY MELT INCLUSIONS IN SAPPHIRES FROM THE ROCK CREEK AND MISSOURI RIVER DEPOSITS IN MONTANA, USA
  T64 Gemological Research in the 21st Century: Exploration, Geology, and Characterization of Diamonds and other Gem Minerals
  Sunday, 1 November 2015

  1:30 PM - 5:30 PM

  Room 342

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2014

• GEOLOGIC MAP OF THE BOZEMAN 30’ X 60’ QUADRANGLE, SOUTHWESTERN MONTANA
  34 Geologic Maps: Record of the Past, Foundation for the Future (Posters)
  Wednesday, 21 May 2014

  8:00 AM - 5:00 PM

  Ballroom B, C, D
• SAPPHIRE DEPOSITS ALONG THE MISSOURI RIVER NEAR HELENA, MONTANA
  5 Petrology, Geochemistry, and Deformation (Posters)
  Monday, 19 May 2014

  8:00 AM - 5:00 PM

  Ballroom B, C, D

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2013

• COMPARISON OF SURFACE MORPHOLOGY OF MONTANA ALLUVIAL SAPPHIRES BY SEM
  T218 Gemological Research in the 21st Century: Characterizing Diamonds and other Gem Minerals
  Tuesday, 29 October 2013

  8:00 AM - 12:00 PM

  Room 205

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2011

• BEDROCK SOURCE OF SAPPHIRES IN ALLUVIAL DEPOSITS IN THE ROCK CREEK, SAPPHIRE DISTRICT, WESTERN MONTANA
  5 Economic and Planetary Geology (Posters)
  Wednesday, 18 May 2011

  8:00 AM - 6:00 PM

  Grand Ballroom

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2008

• Preliminary Oxygen Isotope Values for Montana Sapphires
  193 Mineralogy/Crystallography; Petrology, Experimental; Igneous; Metamorphic (Posters)
  Monday, 6 October 2008

  8:00 AM - 6:00 PM

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2005

• EVIDENCE FOR A METAMORPHIC ORIGIN FOR SAPPHIRES IN AN ALLUVIAL DEPOSIT NEAR BUTTE, MONTANA
  4 General Geology (Posters)
  Monday, 23 May 2005

  8:00 AM - 4:00 PM

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2002

• PROBABLE SOURCES OF ALLUVIAL SAPPHIRES IN WESTERN MONTANA
  20 Gemstone and Semiprecious Minerals and Host Rocks in the Western United States
  Thursday, 9 May 2002

  8:00 AM - 11:00 PM