Thursday, November 13, 2014

Diamonds are a Geologist's Best Friend


Rough diamonds including several fancy diamonds from the Argyle diamond mine,
Australia. Photo "Copyright © 2014 Rio Tinto."
There is evidence supported by geology that the Wyoming province could host a major diamond province. The Wyoming Craton is geologically similar to the Canadian Shield (North American Craton) where many rich diamond deposits sat in the back yard of Canadians until two individuals began to diligently search for diamonds in 1985. This led to the discovery of the rich Ekati diamond deposits and Canada's first diamond mine in 1998. The discovery was followed by several other discoveries. If it wasn't for those two prospectors - Chuck Fipke and Steward Blussom, geologists around the world would still be wondering where all those diamonds accidentally found in glacial till over the past century came from. So, why didn't anyone search?

Diamonds were found in a group of kimberlites along the edge of the Wyoming Craton in 1975 in both Colorado and Wyoming. Several detrital diamonds were found in the Wyoming Province in Montana in the past and more recently diamonds were recovered in a kimberlite in that region. Additionally, kimberlites, lamproites and lamprophyres were found all over the Wyoming Province but these remain a scientific curiosity. Over the next three decades, Wyoming spent essentially nothing compared to the $billions that have been spent in Canada exploring and developing diamond deposits. Yet, hundreds of cryptovolcanic structures of unknown origin remained unexplored and have yet to be drilled in the Wyoming Province. Is the Wyoming Province also a major diamond province? After many years of talking to hundreds of geologists and prospectors about the kimberlites and potential placer diamond deposits, one prospector finally panned one of the many locations suggested by the author and reportedly found a cache of diamonds including one, flawless, 6-carat diamond   verified by a university in North Carolina.
New book on gemstones, diamonds, and gold tells
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Cryptovolcanic structure near Douglas Creek in the Medicine Bow Mountains
of Wyoming. This has been suggested to be an impact structure, but it
is more likely to be a kimberlite pipe.
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Another cryptovolcanic structure of unknown origin - kimberlite? 

Two excellent quality diamonds found by prospector Paul Boden in 1977.
These were recovered with gold in a long tom build on Cortez Creek in the
Medicine Bow Mountains not far from the above cryptovolcanic structures

General map showing diamond mines and diamond anomalies in North America. It should be apparent there is
considerable potential. Much of the high potential for commercial diamond deposits are areas known as cratons (from
Hausel, 2007, 2008).

View of the Wyoming craton showing locations of kimberlites
and related anomalies.
The State Line diamond district. More than 130,000 diamonds were found in this area in or adjacent to kimberlites. The
diamonds ranged from microdiamonds to a 28.3 carat diamond. One diamond fragment from Kelsey Lake was thought
to have broken from an 80 to 90 carat diamond. Placer diamonds were recovered from Fish Creek along the northern
edge of Kelsey Lake (included one diamond that weighed 6.2 carats) and other placer diamonds were found in
Rabbit Creek next to the Sloan 1 and 2 kimberlites, and many placer diamonds were recovered from George Creek. It is
likely that hundreds of thousands of diamonds occur in the nearby streams.

Cryptovolcanic structure in Colorado. Even though there is some snow in the
shade, the white material forming a bull's eye around the depression is all
calcium carbonate. The depression and surrounding hills are all formed of
granite with no known carbonate.

Another cryptovolcanic structure (circular depression) filled with water and surrounded by calcium-carbonate rich soil.
The depression sits on granite in Colorado. So, is this a kimberlite, an impact depression, or just a lake?

HOW & WHERE TO FIND GEMSTONES & GOLD


Released in, 2014, this 369-page book
is packed with information on raw
gemstone descriptions, locations
& lets the reader in on the secrets
used to find colored gemstone, diamond,
gold & unusual rocks. 
One of several hundred cryptovolcanic structures
identified in the Colorado, Kansas, Wyoming region.
This anomaly turned out to be a kimberlite pipe and
was discovered nearly 25 years ago in Colorado by
diamond mining companies.
In the late fall of 2014, the author published a new book published by CreateSpace an Amazon company, describes dozens of colored gemstone, diamond, gold and other minerals and rocks. The book lets the reader in on secrets used to find raw gemstones, diamonds and gold in field.


Written for geologists, prospectors and rock hounds with some background in mineral and rock identification, the author not only provides information on the physical appearance of raw gemstones, but also describes many diamond, gold, ruby, sapphire, iolite, beryl, and other gemstone deposits giving locations using GPS coordinates and legal descriptions so that the reader can visit the deposits on Google Earth and on topographical maps. The author takes another step in describing areas likely to have undiscovered gemstones based on favorable geology – in other words, a few readers likely will find new gemstone deposits based on the information (some people already have)!

There are many cryptovolcanic structures visible on Google Earth that appear to be similar to kimberlite pipes. This is significant in that kimberlite pipes are known as potential hosts for diamond, garnet, chromian diopside and other gemstones. Nearly all of the cryptovolcanic structures identified by the author, remain unexplored in the field. 

In another example, the author describes dozens of silicified fractures in an region covering several square miles that likely have quartz, chalcendony, agate, jasper and even opal. These too remain mostly unexplored.