Jim -- might it be Mineral Park, formerly a Cyprus property in Mohave
County?? Note the following:
But note that this is pretty recent and is about the Rio Tinto of today.
In a message dated 3/22/08 3:15:45 PM, [log in to unmask] writes:
I suggest you contact Nyal Niemuth at the Arizona Dept. of Mines & Mineral
Resources in Phoenix.
602-771-1604. He's a mining engineer, a heck of a helpful guy, and knows the
state very well.
I checked my copy of the Mines Register for 1942 and found the following:
No active Rio Tinto mining operation in Arizona nor Nevada
Under inactive or dormant mines and mining companies, I found Rio Tinto
Copper Co. in Nevada (p. 460)
In the addenda section (p. 612) I found Mountain City Copper Co., but no
mention of where it was located. (I expect Nevada.) It produced gold, silver, and
copper in 1940 and 1941. Operating officials are given, including J.C. Lokken,
mill superintendent. I recall him, from a later period, when he worked for
the Pittsburg, Calif. unit of Dow Chemical Co. where he was involved, I believe,
in Dow's flotation reagent lab -- they made Bear brand xanthates, etc.
> In a message dated 3/22/2008 4:36:56 P.M. Central Daylight Time,
> [log in to unmask] writes:
> A bit more re the eponymous mine of Rio Tinto at Mountain City, Nevada,
> Noel, Peter Bell and all,
> The focus is in the Mohave County area of the western reaches on Arizona.
> The lady for whom we are doing this research mentioned that her grandfather
> worked there in the 1938- 1942 time frame. In 1942 said property was sold.
> Her grandmother always said the properly was not very far from Needles, CA.
> Being it was a base metals mine, Mohave County fits the bill.
> Peter Maciulaitis on this list suggested I consult the 1937 and 1942
> of the Mines Register which I can access here at the University of
> I will consult these volumes and if it is still an issue of which Rio Tinto
> we are dealing with, then I will turn to the folks at RTZ in the UK. I
> cannot thank you all enough for your time and assistance.
> Thank you and a Happy Easter to you all,
> Jim Besleme
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