|Bald Mountain - the site of a proposed open pit porphyry copper mine|
by AMAX in 1980. Note the many drill rig roads at the top of
These properties included Kirwin, Bald Mountain, Stinkingwater, Sunlight and several others and the likelihood of dozens of similar deposits in this region is very favorable. In 1980, AMAX had applied for permits to develop an open pit mine at the Bald Mountain copper-silver porphyry, but the company later dropped their interest in the property.
The proposed mine site was near Yellowstone. Yellowstone was already withdrawn from mineral expiration activity, and over time, the Absaroka Mountains were piecemeal withdrawn and locked up in wilderness, wilderness studies, primitive areas and other designations. The highly-mineralized and locked up area is now as large as some states, and encloses many gold, silver, copper, zinc, lead deposits in Montana and Wyoming.
A few later times, it looked as if the great Ferris-Haggarty mine might begin a new life in the 20th and 21st centuries: (1st) with exploration by Exxon Minerals, which identified a significant gold anomaly in the mine; (2nd), when the author as a consultant, recommended the property to Black Range Minerals from Australia; and (3rd) when a new company referred to as the Ferris-Haggarty mining company, picked up the property with thoughts of reopening and exploring the old mine..
The author was offered a contract with Ferris-Haggarty based on experience as a researcher, geological consultant, and reputation for finding mineral deposits. In addition, the author had conducted past research related to volcanogenic massive sulfides in the Sierra Madre Mountains of Wyoming. The contract included salary and stock options, but the author was never paid a cent, nor given any stock. So, one must wonder what ever happened to the company and CEO? After demanding to have my name removed, and all of my copyright photos extracted from their websites - so be aware of this company. If you decide to invest, it may be best to proceed with caution, or just give your money to some charity.
The Ferris-Haggarty mine is located within the Grand Encampment district of the Sierra Madre Mountains. The Sierra Madre are a forest covered mountain range that rise from the valley floors of the adjacent Great Divide and Platte River Valley basins to over 10,700 feet at Bridger Peak in the heart of the range. Nearby towns include Encampment, Saratoga, Baggs, Sinclair and Rawlins. The district is known for hundreds of historic mines and prospect pits that were dug to test for copper, nickel, cobalt, platinum, palladium, zinc, lead, tantalum, rare earth metals, garnet and/or gold. The district recently was of interest for platinum-group metals and nickel following discovery of anomalous nickel, palladium, gold, copper, silver and platinum (Hausel, 1995, 1997). and typically attracts hundreds of prospectors and treasure hunters each year to search for gold and diamonds.
Ore specimen from the Ferris-Haggarty ore shoot. One of the great mysteries about the F-H mine was the type of ore
since the mine had been inaccessible for nearly a hundred years; yet this was one of the greatest copper mines in
the world in the 19th century. Investigations by Exxon Minerals in the 1980s identified a sizable gold anomaly at the mine,
but the deposit remained basically unexplored along trend and depth (and still does). This specimen suggests considerable
brecciation of the ore and replacement of the matrix with massive copper. The deposit lies in the middle of Proterozoic
schists deposited near an island arc possibly 1.6 billion years ago, and is in the middle of a known massive sulfide district
due to initial research by Conoco Minerals in the late 1970s. Some volcanogenic massive sulfide deposits mined in Canada
and in Arizona have produced $billions in metals. It is likely that the Ferris-Haggarty still contains sizable ore resources
and the surrounding region contains several economic massive sulfides - however, during the 1980s, the US Forest
Service piecemeal withdrew land following every discovery of a massive sulfide deposit in the Sierra Madre Mountains of
Wyoming essentially nationalizing our natural resources.
For the people who still enjoy working, if the FS would support these kinds of projects instead of withdrawing land,
Wyomingites and Coloradoites could have hundreds of high-paying mining jobs if any of these massive sulfides were
|Author and geologist - GemHunter Dan|
|Historical photo of the Ferris Haggarty mine with Tram|
|Underground at the Ferris-Haggarty mine (copyright photo by W. Dan Hausel)|
|Ore zone exposed in the workings of the F-H mine - in this part of the mine|
the ore give the appearance of mill rock (copyright photo by W. Dan Hausel)
It is interesting that the ore was described to occur as fault breccia in quartzite along a contact with schist (Spencer, 1904). Examination of the ore zone by the author showed that it was indeed brecciated and deformed in a shear zone, but that relatively undeformed samples of the ore showed the ore appears as mill rock - associated with a massive sulfide deposit. The matrix of this breccia consists of massive copper ore supporting angular lithic fragments. Thus the adjacent sericitic schist may represent metamorphosed felsic volcanic rock. Until geochemistry and mapping can be completed for the Ferris-Haggarty mine, it may best to refer to the host rock as felsic schist or volcaniclastic. The significance of mill rock is important as similar mill rock has been described elsewhere in the district - such as at the Itmay mine, where mill rock was first described in the district by Conoco Minerals in the early 1980s (Hausel, 1997).
|You can find more information about this|
copper and gold deposit in our Gold book
Millrock was initially coined by a geologist in Canada when it was recognized many volcaniclastic breccias and their associated ore deposits were found near or adjacent to an operating mill in districts like the Flin Flon massive sulfide district in Canada. The concept was that where you found mill rock with its massive sulfides, you had potentially had a commercial ore deposit. At the time of deposition of the Ferris-Haggarty deposit, about 2 billion years ago, the earth’s atmosphere was starting to accumulate oxygen from stromatolites and their associated reefs.
|Ore zone in the Ferris-Haggarty mine (mill rock) (copyright photo by W. Dan Hausel).|
|Ferris-Haggarty ore (copyright by W. Dan Hausel).|
|One of many Precambrian quartz pebble conglomerates found in the|
Medicine Bow and Sierra Madre Mountains of Wyoming.
|Before you go prospecting, arm yourself with geological information.|
|High-grade copper-gold ore from the Ferris Haggarty ore shoot (copyright photo by W. Dan Hausel).|
|Classical volcanogenic massive sulfide ore showing colloform texture indicating it was deposited in a marine environment.|
Sample collected south of the Ferris-Haggarty mine at the Itmay mine (copyright photo by W. Dan Hausel).
|Classical 'Millrock' near the Itmay mine, south of the Ferris-Haggarty. This volcanogenic breccia was deposited by|
a submarine hydrothermal vent during the Proterozoic and may be similar in age as the United Verde massive sulfide
in Arizona (Copyright photo by W. Dan Hausel).
|Find more about the Ferris-Haggarty in the 1997 book on metals in Wyoming.|
|Latest book published by the author|