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Felix Mine, Azusa (Dalton), San Gabriel Mts, Los Angeles Co., California, USA

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Latitude & Longitude (WGS84): 34° 9' 7'' North , 117° 53' 60'' West
Latitude & Longitude (decimal): 34.15194,-117.90000


A former fluorspar mine located in the S½ sec. 23, T1N, R10W, SBM, ½ mile E of the N end of Azusa Avenue, 2.1 km (7,000 feet) NNE of the city of Azusa (Dalton), Los Angeles County, California.

The deposits here have been known as a source of fine fluorite specimens since 1892, and are located on a steep, brushy hillside of decomposed granite hosting numerous subparallel fluorite-bearing veins. The larger crystals generally show octahedral and cube face development, frequently occurring as individuals and small groups on a druzy quartz matrix, with bladed white barite associations common. Most of the fluorites recovered are green in color, although some blue and purple crystals have been found. Inclusions of galena, sphalerite, and chalcopyrite are noted to occur in the fluorite crystals. Secondary minerals such as cerussite and malachite have been found in the deepest parts of the diggings.

Note the "Minium" reported here as inclusions within Fluorite crystals has been shown to be Cinnabar - see this article

Mineral List


11 valid minerals. 1 erroneous literature entry.

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

Tertiary - Lopingian
2.588 - 259.9 Ma
Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges)

Age: Phanerozoic (2.588 - 259.9 Ma)

Stratigraphic Name: Atolia Quartz Monzonite; Coxcomb Granodiorite; Holcomb Quartz Monzonite; Lar Quartz Diorite; Liebre Quartz Monzonite; Mount Pinos Granite; Palms Granite; Sands Granite; Teutonia Quartz Monzonite; White Tank Quartz Monzonite; Vermont Quartz Diorite; Cadiz Valley Batholith; Barcroft Granodiorite; Bass Lake Tonalite; Big Baldy Granite; Boundary Peak Granite; Bridalveil Granite; Burnside Lake Adamellite; Cabin Granodiorite; Cactus Point Granite; Carson Pass Tonalite; Cathedral Peak Granite; Clover Creek Granodiorite; Cottonwood Adamellite; Cow Creek Granodiorite; Dinkey Creek Granodiorite; Ebbetts Pass Granodiorite; El Capitan Granite; Evolution Basin Alaskite; Giant Forest Granodiorite; Half Dome Quartz Monzonite; Hunter Mountain Quartz Monzonite; Inconsolable Granodiorite; Isabella Granodiorite; Johnson Granite Porphyry; Knowles Granodiorite; Lake Edison Granodiorite; Lamarck Granodiorite; Leaning Tower Quartz Monzonite; Lebec Quartz Monzonite; Leidy Adamellite; Lodgepole Granite; Lookout Peak Tonalite; McAfee Adamellite; Mitchell Peak Granodiorite; Mono Creek Granite; Mount Clark Granite; Mount Givens Granodiorite; Pear Lake Quartz Monzonite; Paradise Granodiorite; Pellesier Granite; Pohono Granodiorite; Potwisha Quartz Diorite; Round Valley Peak Granodiorite; Sacatar Quartz Diorite; Sage Hen Adamellite; Sentinel Granodiorite; Stanislaus Meadow Adamellite; Taft Granite; Tamarack Leuco-Adamellite; Tejon Lookout Granite; Tinemaha Granodiorite; Tungsten Hills Quartz Monzonite; Ward Mountain Trondhjemite; Weaver Lake Quartz Monzonite; Wheeler Crest Quartz Monzonite; Whitney Granodiorite. Hunter Mountain Batholith; Inyo Batholith; Sierra Nevada Batholith. Bald Rock Pluton; Bucks Lake Pluton; Bullfrog Pluton; Cartridge Pass Pluton; Cascade Pluton; Dragon Pluton; Grizzly Pluton; Independence Pluton; Merrimac Pluton; Paiute Monument Pluton; Papoose Flat Pluton; Pat Keyes Pluton; Sage Hen Flat Pluton; Santa Rita Flat Pluton; Swedes Flat Pluton; Tuolumne Intrusive Suite; John Muir Intrusive Suite; Shaver Intrusive Suite; Palisade Crest Intrusive Suite; Scheelite Intrusive Suite; Fine Gold Intrusive Suite; Soldier Pass Intrusive Suite; Mount Whitney Intrusive Suite

Description: Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Comments: Sierra Nevada, Death Valley area, Transverse Ranges and Mojave Desert. Primarily granodiorite, tonalite, quartz monzonite, and granite ranging in age from Late Triassic to Late Cretaceous. Includes some rocks as old as Permian and possibly a few as young as Tertiary. Three main periods of emplacement (Triassic, Jurassic, and Cretaceous); wide variety of rock types

Lithology: Major:{granodiorite}, Minor:{granite,tonalite,quartz diorite,quartz monzonite}, Incidental:{diorite, quartz syenite, quartz monzodiorite, gabbro, trondhjemite, monzonite, monzodiorite, pegmatite, alaskite, aplite}

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
Tonalite of San Gabriel Reservoir

Age: Cretaceous (66 - 145 Ma)

Description: Biotite-hornblende tonalite, ranging to granodiorite and quartz-bearing diorite. Forms east-west elongate body at front of San Gabriel Mountains on both sides of San Gabriel Canyon. Similar to tonalite of San Sevaine Lookout (Kss), but consistently more mafic. Medium- to coarse-grained, locally containing sparse plagioclase or potassium feldspar phenocrysts up to 2 cm long. Most rocks are weakly to moderately foliated, but at some places, foliation is either strongly developed or almost absent. Hornblende typically much more abundant than biotite; average color index is about 30, but varies widely from about 15 to 40. Contains abundant gneiss bodies ranging in size from tens of centimeters to hundreds of meters in length; bodies are larger and more abundant near contacts with large mapped gneiss units. Unit is moderately heterogeneous with respect to texture and composition, but much more homogeneous than bounding Mesozoic to Proterozoic units found northward to San Gaberial Fault. Considered Cretaceous based on similarity to tonalite of San Sevaine Lookout (Kss) and quartz diorite of Mount San Antonio (Ksa)

Reference: Morton, D.M., F.K. Miller . Geologic Map of the San Bernardino and Santa Ana 30' x 60' quadrangles, California. U.S. Geological Survey Open-File Report 2006-1217. [42]

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



This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

Palache, C., Berman, H. and Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, Volume I, 834pp.: 518.

Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 39.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 97, 187, 190, 267.

Carnahan, V. (1967), Minerals of Los Angeles County, part 1, Catalina Island, Palos Verdes and Soledad Basin: Los Angeles County Natural History Museum Alliance Quarterly: 6(2): 22.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 184, 188.

Housley, R. (2008), Felix Mine cinnabar, not minium. Mindat.org article 341. June.

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