QUOTE (EMac @ Aug 18 2016, 11:05 AM)
Do you have source material for this as well? I'm curious what he was selling for $1300 a ton when hot rolled steel was selling for less than $1.60 per 100 pounds (quick math says that's less than $32 a ton). Wikipedia (granted, not exactly a perfect source) says that variety of iron ore was selling for $125/ton. Still a far cry from $1300, so my interest is piqued.
Characterizing the Canyon Diablo meteorite deposits as having an iron value is akin to valuing a nice gold nugget as being valued by it's quartz content. Even classifying the meteorite material as nickeliferous would be an understatement.
While the
best Nickel deposits in the world range as high as 1.2% Nickel in the iron mined the Canyon Diablo meteorites are 8% Nickel, 91 - 92 % iron with about 1/2 to 3/4 ounce platinum and iridium per ton of iron. This is truly extraordinary unoxidizable natural metal alloy. The fact that it's the largest deposit of metal of this quality found in modern times made it very desirable. This is Iron alloyed with Nickel and Platinum group metals. If you were to add carbon to the Canyon Diablo siderite material you would get a crumbling mess - not steel.
The deposit was certified as meteoric in June 1891 by Dr. A.E. Foote of Philidelphia. Dr. Foote was the most respected mineralogist of the time and he had a special interest in meteorites. When he heard of the Canyon Diablo material qualities from the smelter he asked for a raw sample. This was the period in which the Canyon Diablo material was being heavily mined and was reported to be selling for upwards of $1,300 a ton.
The siderite material from Canyon Diablo was well known and a hot subject well before Barringer's involvement. Here's another point of view from the period from
Professor Fairchild.
The meteorite deposit was first discovered by English speaking Europeans in 1871. I suspect from my study that it was commonly known material well before then. Barringer did not discover the deposit. In fact he didn't even visit the area until after he bought the working mines there in 1903. Barringer was wealthy and well known both as the owner of the very rich Tombstone Pearce mine silver strike and as the United States' most respected mining lawyer. His book "
The law of mines and mining in the United States" is by far the best seller in it's genre with constant reprints since it's introduction in 1901. You can buy a
modern printing (2015) from Arkose press or you can download the entire book for free from several sources - it's out of copyright.
QUOTE (EMac @ Aug 18 2016, 11:05 AM)
This piece seems similar to the Schrodinger's cat thought experiment...minus the quantum positioning stuff.
When Barringer presented the papers in 1906 and 1909, he thought there was a mass buried. In 1928 (19 years after his presentation), he still thought a mass was present, and he was gathering investors to mine what he still thought was millions of tons of iron. It wasn't until Moulton's estimates that the meteorite was much smaller (300k tons) and was likely vaporized, that he stopped mining operations. So for 25 years, the impression (at least from Barringer) was there was a massive deposit of iron to be mined. This, to me, renders the lack of clarity about in situ vs surficial interesting. From what I've read (and I'm hoping you have material to help refine this for me), the scientific community thought it was a volcano and meteorite pieces were coincidental. It would stand to reason then that the community assumed Barringer intended to mine a volcano which suggests to me the claim type should have been a lode claim when he filed placer claims. Interesting indeed.
Edited for grammar.
There are some references to the possibility of gas explosions creating the crater. Volcano would be a big stretch of the facts though. The entire site area is composed of the fine bedded "Supai" formation
limestone/sandstone composing the Central Arizona segment of the Colorado Plateau - there isn't any evidence of volcanics or any ore deposits for many miles. The Supai material is very uniform with no mineral inclusions of commercial value - it's sandstone. There are no other historical mines of any type for nearly a hundred miles.
A better view of what the scientific community thought of the crater in 1905 and it's relationship to meteorites can be found in the President's public release describing Barringer's presentation to the Academy of Natural Science in 1905:
QUOTE
Dixon S.G. (1905.) Coon Mountains and its Crater. President's statement. Proceedings of the Academy of Natural Science of Philadelphia,
December, 5.
On December 5, 1905, at a session of the Academy of Natural Sciences, Philadelphia, USA, its president Mr. S. G. Dixon has announced that two members of the Academy, D. M. Barringer and B. C. Tilghman made a "...discovery that the crater of Coon Mountain or Coon Butte... is an impact crater and not a crater produced by a steam explosion, as has been supposed since the examination made of it by members of the United States Geological Survey. They have proved, " he continued, " that the large crater and elevation known as Coon Mountain is the result of a collision with the Earth of a very large meteorite or possibly of a small asteroid, fragments of which are well known to the scientific world by name of the Canyon Diablo siderites... Mr. Barringer and Mr. Tilghman have presented to the Academy for publication two comprehensive papers in which they set forth in full their reasons for the above statements "
Barringer himself knew that there were no siderites found in the crater. He was obviously fascinated by the possibilities but he knew there was no hard evidence for his theory. The fact that he poured most of his considerable fortune into investigating his theory tends to draw attention away from the siderites and their location distributed away from the rim of the crater. Here is a map of the location of the known meteorite material from 1908, notice that the crater is barren of meteorite material:
Click to view attachmentThat map is probably the best visual demonstration of why it was a placer deposit you will find short of seeing the deposit yourself. There is still a lot of meteorite material on and in the near surface of the crater area. There was never any "source" rock in place or valuable deposit found at depth. Berringer himself believed his envisioned mass of material would not be found as deep as 300 feet. It was and is without a doubt a loose surface deposit.
Historically the Canyon Diablo siderites were never in question. They were early on recognized as high Nickel/Iron siderites. The controversy revolved around whether the crater was caused by the meteorite or the meteorite deposit was coincidental.
The mines and subsequent mineral patents were based on the commercial value of the meteorite deposit. Besides the Nickel/Iron/Pt there was a valuable trade in the
Moissanite "diamonds" first discovered there as well as the collectable value of the siderites. No mining claim or patent could ever succeed based on a geographic shape - even one formed by an extraterrestrial object.
There is a lot published on this subject. You might find a copy of
Coon Mountain Controversies, by W.G.Hoyt 1987, 442pp interesting. There is a free copy of his son's recollection of the prospecting operations.
Daniel Moureau Barringer and His Crater Brandon Barringer 1964 published by the Meteoritical Society. Both of these writings as well as many more available from the period show that the nature of the meteorite material or it's composition and value were never in question. The only controversy was about the origins of the crater.