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North Star mine, Green Cabin Mine (F. A. Salmons claim; Frank A. Salmons mine; Tourmaline Queen group), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA

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Latitude & Longitude (WGS84): 33° 23' 9'' North , 117° 3' 46'' West
Latitude & Longitude (decimal): 33.3858333333, -117.062777778


If I could put my hand on the north star, would it be as beautiful?
—Ralph Waldo Emerson (1803–1882), U.S. essayist, poet, philosopher. “Beauty,” The Conduct of Life (1860).

Setting:
Located near the center of the N2NE4NW4 Sec. 23 T9S R2W SBM, about 1.70 miles north-northeast of Pala, the workings are situated along the northeastern slope of Tourmaline Queen Mountain.

History:
The prospect was developed by short adits and shallow cuts made in the northern exposure of the Stewart pegmatite dike, which strikes north and dips approximately 20 degrees west. In 1951, Richard H. Jahns listed the principal output as tourmaline and quartz[1]. Jahns includes a cross-section of the west tunnel which extended 50 feet into gabbroic country rock, cutting through two veins of quartz-mica schist.

The pegmatite is described as consisting of quartz, perthite, albite and muscovite, while the hangwall was described as septa-like graphic granite with tapered edges. It appears the short lateral drift encountered a shear zone associated with the schistose rocks, and then continued approximately 10 feet beyond the actual hangwall of the dike, and back into the gabbro. Jahns describes the pegmatite exposed in the workings as appearing to be virtually barren of commercially desirable minerals[2]. There is no mention of lepidolite, colored tourmaline, or any evidence of lithia mineralization exposed in the dumps. The claim was considered abandoned by 1958. The area is within lands managed for the benefit of the Pala Band of Mission Indians by the Bureau of Indian Affairs (BIA).

Footnotes:
1.While describing the area north of the Gem Star mine Canyon workings, Jahns states that: "Most of the pocket material encountered in the Whim and nearby workings was beneath the coarse schorl-rich unit and within thin, discontinuous segments of massive quartz with giant euhedral crystals of perthite. Little but quartz crystals was obtained." [emphasis added]
2.While describing the Gem Star workings, adjacent to and south of the North Star - Jahns states: "The openings from which most of the gem production was obtained are known as the Canyon workings, and lie at the south end of the mine area."

Mineral List


6 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Holocene - Pliocene
0 - 5.333 Ma
Quaternary alluvium and marine deposits

Age: Cenozoic (0 - 5.333 Ma)

Stratigraphic Name: Temescal Formation; Modesto Formation; Victor Formation; Alameda Formation; Aromas Red Sands; Bautista Beds; Brawley Formation; Borrego Formation; Burnt Canyon Breccia; Cabezon Fanglomerate; Campus Formation; Casitas Formation; Chemehuevi Formation; Corcoran Clay; Cushenbury Springs Formation; Dos Picachos Gravels; Dripping Springs Formation; Frazier Mountain Formation; Friant Formation; Harold Formation; Heights Fanglomerate; Hookton Formation (part); Huichica Formation; La Habra Formation; Manix Lake Beds; Mohawk Lake Beds; Montezuma Formation; Nadeau Gravel; Ocotillo Conglomerate; Orcutt Formation; Pacoima Formation; Pauba Formation; Peckham Formation; Pinto Formation; Resting Springs Formation; Riverbank Formation; Rohnerville Formation; San Dimas Formation; Shoemaker Gravel; Temecula Arkose; Battery Formation; Bay Point Formation; Colma Formation; Lindavista Formation; Lomita Marl; Merritt Sand; Millerton Formation; Palos Verdes Sand; San Pedro Formation; Sweitzer Formation; Timms Point Silt

Description: Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.

Lithology: Major:{coarse alluvium}, Minor:{fine alluvium}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Cretaceous
66 - 145 Ma
Granite pegmatite dike

Age: Cretaceous (66 - 145 Ma)

Description: Tabular, pegmatitic-textured granitic dikes. Most dikes range in thickness from a few centimeters to over a meter. Larger dikes are typically zoned compositionally and texturally.

Reference: Kennedy, M.P., and S.S. Tan. digital prep. by Bovard et al. Geologic Map of the Oceanside 30’ x 60’ Quadrangle, California. California Department of Conservation California Geological Survey. [131]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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References

Jahns, R. H. and Wright, L. A. (1951), Gem and Lithium-bearing pegmatites of the Pala District, San Diego County, California. California Division of Mines special report 7A: p. 14, 24, 57-59, 72 pp.

Weber, F. H. (1963), Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 109.

 
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