SUPPORT US. If is important to you, click here to donate to our Fall 2019 fundraiser!
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe Elements书籍及杂志
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
Mining Companies统计会员列表Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo Galleries今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集Mineral Photography

Three-R Mine (3R Mine), Three-R Mine group, Three-R Canyon, Palmetto District, Patagonia Mts, Santa Cruz Co., Arizona, USA

This page is currently not sponsored. Click here to sponsor this page.
‡Ref.: Schrader, F.C. (1913), Alunite in Patagonia, Arizona, and Bovard, Nevada, Economic Geology: 8: 752-767.

Probert, F.R. (1914), The Three R mine, Patagonia district, Arizona: Mining and Scientific Press: 109(5): 176.

Schrader, F.C. (1914), Alunite in granite porphyry near Patagonia, Arizona, USGS Bull. 540: 347-350.

Schrader & Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 282-287.

Schrader, F.C. (1917), The geologic distribution and genesis of the metals in the Santa Rita-Patagonia Mountains, Arizona, Economic Geology: 12: 237-269.

Tenney, J.B. (1928), The Mineral Industries of Arizona, Arizona Bureau of Mines Bull. 125: 75.

Wilson, E.D. (1944), Arizona nonmetallics: A summary of past production and present operations, Arizona Bureau of Mines Bull. 152.

Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 23.

Wilson, E.D. & G.H. Roseveare (1949), Arizona Nonmetallics, A Summary of Past Production and Present Operations, 2nd. Edition (revised), Arizona Bureau of Mines Bull. 155: 8.

Galbraith, F.W. & Brennan (1959), Minerals of Arizona: 64.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 107, 164, 186, 191, 341.

A copper mine located on 30 or more claims on the eastern border of the district, 4½ miles south of Patagonia. It is in the upper west slope of the Patagonia Mountains near the axis of the range, mostly between elevations of 5,100 and 5,500 feet. Discovered in 1897. Bonded to W.R. Green, of Cananea circa 1899-1907; later the Lewisohn people, through H.S. McKay, took an option on it for about 4 months only; and, owned by the Three R Syndicate (circa 1909); R.R. Richardson was a leading owner in 1911; by April, 1912, it was bonded to N.L. Amster of Boston, MA.

This mine is in the upfaulted block of the Patagonia Mountains. The country rock is mainly the granite porphyry. It is composed of quartz and orthoclase in large aggregates with rarely a little biotite. It is much weathered, altered, pyritic, and iron-stained, and is vertically sliced by two systems of sheeting, of which the dominant system trends about north-south, parallel with the Colossus lode, and the other about N.75ºE. Mineralized shear zones occur in both systems, some of them being marked by ledges with enormous croppings, such as that of the Blue Rock No. 8, southeast of the Three R Mine, belonging to the east-west system. The rock, especially in the vicinity of the north-south shear zones, has also been pressed and sheared to a high degree, so that it weathers like a schist, which it locally resembles. It is cut by dikes of rhyolite and a younger granite porphyry, but these rocks seem to be only sparingly present.

Mineralization is ore deposits that occur in a north-south shear zone about parallel with the axis of the range, traversing the granite porphyry country rock, which is heavily impregnated with pyrite, apparently cupriferous, and a little chalcopyrite. Along the shear zones there is a concentration of these minerals, forming crude stockworks and veins. Alum and copper sulphates coat the workings.

At and in the mine the shear zone has a width of 40 to 100 feet or more, and is variously traversed by parallel stringers, seams, and bands of ferruginous rock or hematite. One of these bands is about 1 foot (30 cm) in width, is partly honeycombed, and in part has a laminated or platy structure, being apparently pseudomorphous after calcite or some othe spar mineral. This band is said to carry some copper and gold, and father up the mountain side it contains lead minerals as well.

The Colossus tunnel, driven in the shear zone, largely follows a slip or fault plane, which dips 75ºW., and is associated with a ½ to 1½ inch (1.25 to 3.75 cm) band of hematite or reddish-brown ferruginous rock, on the footwall side of which occurs from 1 to 3 feet of crushed and partly mineralized reddish-brown, iron-stained granite porphyry. The zone also contains seams, stringers, veins, and lenses of rich copper ore, consisting of malachite and chalcopyrite with pyrite, bornite, and chalcocite, of which the largest observed is a band about 2 inches (5 cm) wide, composed of pure chalcocite, enclosed in slickensided porphyry and whitish gouge, showing that more or less profound movement has taken place sinc ethe chalcocite was deposited. Native copper occurs, apparently derived from chalcocite.

As a rule the sulphides begin at or very near the surface, about the only exception being the Mayflower opening (tunnel), at the top of the hill, where, owing to leaching, much carbonate is encountered.
Workings comprised several thousand feet of work consisting of tunnels and drifts distributed through a vertical range of about 400 feet. In 1909 there were three tunnels, located, respectively, at elevations of about 5,200, 5,300, and 5,500 feet, with lengths of about 200 to 300 feet. The Colossus, or main tunnel working, contained about 70 feet of crosscut to the east, and as much more to the west, and a 70 foot deep winze. There was also a 375 foot deep, double-compartment shaft. A new 600 foot lower tunnel was driven circa 1915. It contains 500 feet of drift on the vein and a 90 foot winze with drifts at 60 feet below the tunnel level.

Mineral List

13 entries listed. 11 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
矿物 and/or 产地  
版权所有© mindat.org1993年至2019年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2019.12.6 17:36:03 Page generated: 2015.1.17 00:36:14
Go to top of page