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Author: Subject: ramping up copper mining at el arco
advrider
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[*] posted on 5-21-2021 at 12:31 PM


Wow good stuff you guys. I would love to see a trip take place to some exploring with the guys that already know the good spots.
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AKgringo
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[*] posted on 5-21-2021 at 01:23 PM


Have any of you Nomad prospectors have any experience with metal detecting devices in Baja? I have a Gold Bug II, that I never really learned how to use.

With my hearing loss I have had no luck discriminating between the copious amounts of iron in this area, and background noise. I would at the very least need to have some good head phones, and an experienced operator to coach me.

I also have one of the Briggs and Stratton powered dry washers in the basement that I have never used. It belonged to my dad, who was a rock hound and desert explorer.




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[*] posted on 8-10-2021 at 02:25 PM


Jack, cool pictures of the old dry washers. Water was always a scarce commodity in the area, as it still is.

And now a little additional historical information.

This took some digging!

This is from the 1908 "The Copper Mining Handbook" by Horace J. Stevens. The Copper Mining Handbook was a journal (actually, a thick book) that covered the global copper mining industry over several decades. Each edition had a listing of copper mining companies and in the 1908 edition there was included:

"The Ybarra Gold Mining Company. 132 Market St San Francisco Mine office Calmalli Sur Baja. A. J. Mayer Superintendent. Lands include the Buenavista San Francisco and other mines carrying auriferous and argentiferous* copper ores. Has steam power and 25 ton mill employing 75 men at last account."

*ore that contained gold and silver

It is likely that the some of copper ore mined at El Arco in the 1920's made its way to the smelter at Santa Rosalia. Perhaps the breakwater constructed of copper slag at Santa Rosalia has a little bit of El Arco in it. The gold that was recovered from the copper ore, what there was of it, ended up in the vaults of the Rothschilds, of France, with some no doubt accruing to the Bank of England after the matte from Santa Rosalia was delivered to London where it was transformed by fire and electrical currents into pure metallic elements. Dickens described the hellish scene of the furnaces of London in one of his novels.

AK, the gold bug is known as a very sensitive detector but in areas with a lot of "hot rocks" it is almost useless due to false signals. An entry level Minelab multi frequency vlf in the $350 range would give you an idea if you want to pursue the hobby and can also be used for detecting on the beach.




[Edited on 8-10-2021 by bajaric]

[Edited on 8-10-2021 by bajaric]
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David K
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[*] posted on 8-10-2021 at 04:53 PM


In the 1930 AAA guide/ map that Harald sent me is the following about El Arco or as they called it "El Arco Mine":



"...100 men engaged in the mining of gold."



Notice in the upper left, before the point and bay name was changed to 'Rosalillita' (to prevent confusion with the Copper mine town).

[Edited on 8-11-2021 by David K]




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[*] posted on 8-11-2021 at 08:09 AM
Compare


Atlas image near El Arco


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[*] posted on 8-11-2021 at 09:04 AM


Beautiful map! The Old El Camino Real and Baja Divide routes are nice to see, too.



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[*] posted on 8-11-2021 at 10:07 PM


According to Beto in San Francisquitos, The mining representatives have been talking to him about building a road thru his property. He thinks they will build it out to the end of the point on the southeast side of the bay and build a pier off the end into the deep water.
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[*] posted on 8-13-2021 at 09:25 AM


Quote: Originally posted by rzitren  
According to Beto in San Francisquitos, The mining representatives have been talking to him about building a road thru his property. He thinks they will build it out to the end of the point on the southeast side of the bay and build a pier off the end into the deep water.


I presume this is for the future, giant El Arco copper mine? Hopefully a pier, and road, between Beto's cove and the PSFO resort, will not put dust or noise into his peaceful cove.




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[*] posted on 8-14-2021 at 11:43 AM


Quote: Originally posted by mtgoat666  
Prior to 1960s, al arco was site of small mining operations, including some placer ops.

Beginning in 1960s, Asarco (and later others) started spending significant $$ on exploration work.

Mining has probably never taken off there because of the remote location and lack of water.

Mining is all talk until they actually start mining,… they may not start large-scale mining at el arco for another 10, 20, 30 years, etc., especially if grupo Mexico has better mines to exploit for the next few decades.

According to the 10-Ks, the owner has been buying up lots of land, so maybe they are getting serious about mining. Who knows?



There is water there. My neighbor drilled the water wells for them 30 years ago.
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