Victor Mine (Big Buck mine; Big Buck prospect), Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
|Latitude & Longitude (WGS84):||33° 15' 51'' North , 116° 56' 22'' West|
|Latitude & Longitude (decimal):||33.26417,-116.93944|
|Köppen climate type:||Csa : Hot-summer Mediterranean climate|
The Victor mine is located in the SE4NW4 Sec. 36, T10S, R1W; approximately 2 miles (3.2 km) south-southeast of Rincon on Mack ridge at the southwestern base of Rincon mountain where it is bound by the San Luis Rey river. The deposit consists of a granite pegmaitite dike that is exposed only in the workings.
Bismuth in small, bright metallic cleavages occurs in the lepidolite of the Victor vein. Bismite is associated with the bismuth as a bright yellow oxidation product. Several small imperfect prismatic crystals of Columbite were found in the Victor mine.
Tourmaline occurs in a variety of colors—pink, blue, violet, green, colorless and black. The distribution of color in these tourmalines is usually; The central part is pink. Surrounding that on all sides is a pale green zone. The lower part of the crystal is deep blue often with a pale blue or colorless layer at the extreme end. A crystal broken transversely through the middle shows a central pink core with a green exterior zone. Some crystals are practically all blue or green, while others are mostly pink. Minute colorless prismatic crystals (achroite) occurring as a coating on quartz, albite and lepidolite. A little rubellite in radiating columnar aggregates occurs in lepidolite as in the Stewart mine at Pala.
A few transparent pale pink beryls of thick tabular habit were found at the Victor mine. A few small specimens of white cleavable amblygonite were also found at the Victor mine.
Albite is found at the Victor mine which occurs in crystals of the usual tabular habit. The crystals are invariably twinned, usually according to both the albite and Carlsbad laws. A single albite twin and a single Carlsbad twin were observed by Rogers in 1909.
Orthoclase is a prominent constituent of the veins, but is rarely well crystallized. A few Baveno twins were found. The orthoclase is clear and weathers away easily, leaving ridges of albite which is more opaque. These corroded specimens are often covered with a secondary parallel growth of clear, glassy orthoclase. Part of this pale brown feldspar is microcline.
Hyalite occurs as a secondary mineral, forming a thin coating on some of the quartz crystals and albite crystals.
Lepidolite occurs at the Victor mine near the center of the vein, but is not very prominent. It is fine to coarse scaly and is often intimately associated with albite crystals. A soft plumose muscovite near the Victor mine contains 1 cm. garnet crystals.
Stilbite occurs as brown sheaf-like aggregates coating all the other minerals of the pockets. The individual crystals are 3 or 4 mm. long. Heulandite occurs sparingly associated with stilbite. The crystals are pale brown, sharp in angle and have the usual forms. Minute crystals of Laumontite were found on a few specimens as a cavity lining. A very soft radiated white mineral from the Victor is apparently a laumontite pseudomorph after stilbite.
20 valid minerals.
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
|Late Cretaceous - Middle Jurassic|
66 - 174.1 Ma
|Mesozoic granitic rocks, unit 2 (Peninsular Ranges)|
Age: Mesozoic (66 - 174.1 Ma)
Stratigraphic Name: Bonsall Tonalite; Bradley Granodiorite; Cactus Quartz Monzonite; Cajalco Quartz Monzonite; Corona Hornblende Granodiorite Porphyry; Domenigoni Valley Granodiorite; Escondido Creek Leucogranodiorite; Estelle Tonalite; Fargo Canyon Diorite; Green Valley Tonalite; Home Gardens Quartz Monzonite Porphyry; Indian Mountain Leucogranodiorite; Lakeview Mountain Tonalite; Lake Wolford Leucogranodiorite; La Sierra Tonalite; Mount Hole Granodiorite; Rattlesnake Granite; Roblar Leucogranite; San Jacinto Granodiorite; Stonewall Quartz Diorite; Woodson Mountain Granodiorite
Comments: Peninsular Ranges. Primarily tonalite, granodiorite, and minor quartz monzonite and granite. Emplacement ages mostly 80 to 105 Ma in eastern part of area and 105 to 140 Ma in western part; minor Jurassic rocks in central part
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. 
Tucker, W. B., Reed, C. H. (1939), Los Angeles Field District - Mineral Resources of San Diego County. California Journal of Mines and Geology, quarterly chapter of State Mineralogist's Report 35; January: p. 54.
Palache, Charles, Berman, Harry & Frondel, Clifford (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 785.
Hanley, J. B. (1951), Economic Geology of the Rincon Pegmatites, San Diego County, California. Department of Natural Resources, California Division of Mines, Special Report 7B: pages 18-20, illus., maps.
Weber, F. H., Jr. (1963a), Mines and mineral resources of San Diego County, California; California Division of Mines and Geology, County Report 3, 309 pp.: 114, 188.
Moore, P. B. (2000), Analyses of Primary Phosphates from Pegmatites in Maine and Other Localities, in V. T. King (editor), Mineralogy of Maine. Mining History, Gems, and Geology, Maine Geological Survey, Augusta, Maine, p. 333-336.
Fisher, J. (2002), Gem and rare-element pegmatites of southern California. Mineralogical Record, Vol. 33: p. 389-390.
Fisher, Jesse (2011), Mines and Minerals of the Southern California Pegmatite Province. Rocks & Minerals: 86: 14-34.