Tuesday, December 30, 2008
The Leucite Hills consist of several lamproite volcanoes & flows that erupted 900,000 to 3.1 million years ago. They started their journey under one of the thickest parts of the Wyoming Craton. Cratons are very old, cool, continental cores necessary to have melting deep within the earth's upper mantle (where diamonds are formed). While exploring this region, I collected grab samples from lamproite in the northeastern part of the field & two yielded chromites with similar geochemistry to chromites found as mineral inclusions in diamond - thus this tells me some of the volcanoes began their journey at 90 to 120 miles beneath the surface where diamonds are common.
Diamondiferous lamproites are found at Murfreesburo, Arkansas; Argyle & Ellendale, Australia; Majhgwan-Chelima, India; Kapamba, Zambia; Aldan, Russia & Bobi, Ivory Coast. The richest deposits are typically found in olivine lamproites which often alter to serpentinite (a very soft material) that erodes quickly, thus such deposits are usually hidden within a field of leucite lamproites (which are much harder rock). Thus, this all suggests a few diamonds are likely to occur in the lamproites with diamond-stability chromites, but the locations for rich diamond deposits are hidden. Along the northern edge of this field, a large sand dune field that marks the location of a major continental shear - a favorable structure for hidden lamproites. One can almost guarantee there are diamondiferous olivine lamproites in this area hidden under a few feet of sand. Lamproites are also well known for colored stones - brown, yellow & the beautiful, extremely rare Argyle 'Pinks'. Some have sold for >$US1 million/carat!
While searching for diamonds, I started looking for olivine. In 1997, I came across two green anthills at Black Rock - the ants had collected all of the available olivine in the immediate area & decorated their hills. So I collected the hills & processed them for diamonds - but all we found were 13,000 carats of flawless peridot (gem-quality olivine). Some were 12 millimeters in length. I also found peridot in place that were nearly 0.5 inch across.
Even though olivine had been recognized in this area >100 years ago, no one had ever looked at the quality of the olivine. Later, I mapped the Leucite Hills and identified all of the olivine bearing volcanoes.
Polymath of Martial Arts, Pencil, Books, Rocks, Minerals, Star Gazing & Speech. Recipient of national & international awards in geology, public speaking, art, mineral discoveries, exploration, education, teaching, martial arts & writing.
Member of Halls-of-Fame in martial arts and geological sciences including 2001 National Rock Hound & Lapidary Hall of Fame, 2001 North American Black Belt Hall of Fame, 2004 International Martial Arts Black Belt Hall of Fame, 2004 American Karate Association Hall of Fame, 2004 United States Martial Arts Hall of Fame, 2000 World Karate Union Hall of Fame, 2000 Millennium Hall of Fame & others. Member of several dozen Who's Who Compendiums. Author of hundreds of articles, maps and books.
2001 International Martial Arts Instructor of the Year, the 2004 Karate Instructor of the Year; recipient of the 2009 Thayer Lindsley Award in Economic Geology, 2006 Archimedes Award in Geological Sciences, 2004 Wyoming Geological Association Distinguished Service Award, 2001 Education Award, 2000 President?s Certificate, 1994 Laramie Lyceum Distinguished Speaker, 1998 Dept of Geology & Geophysics Distinguished Lecturer.
Appointed to World Soke Council Board in 2001; International Council of Masters & Grandmasters in 2005 & US Soke Council in 2007. Certified in 1999 as Sokeshodai by Zen Kokusai Soke Budo Bugei Renmei. Member of Juko Kai International.