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May Lundy Mine (Crystal Lake Mine), Mount Scowden, Homer District (May Lundy District; Lundy District), Mono Co., California, USA

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Latitude & Longitude (WGS84): 38° 0' 7'' North , 119° 15' 26'' West
Latitude & Longitude (decimal): 38.00194,-119.25722
Köppen climate type:Csb : Warm-summer Mediterranean climate

A former lode Au-Ag-Pb-Cu-Zn-As mine located in sec. 30, T2N, R25E, MDM, 0.8 km (2,500 feet) SSE of Mount Scowden (coordinates of record) (on SE slope of the mountain), on private (patented) land within a National Forest wilderness land area (Hoover Wilderness). Owned by ML Ltd. MRDS database stated accuracy for this location is 10 meters.

Overview: The May Lundy Mine is in the historic Homer mining district on the east side of the Sierra Nevada in west-central Mono County in the vicinity of Lundy Lake, about 6 miles (9.6 km) west of Mono Lake. The district is also known as the May Lundy or Lundy district, because the May Lundy Mine was the principal source of gold in the district. Ownership of the mine included the Homer Company, May Lundy Mining Co., and Crystal Lake Gold Mining Company, which changed the name to Crystal Lake Mine. The area was prospected during the Comstock silver rush of the 1860s, but the lode deposits were not discovered until 1877 and the May Lundy Mine discovered in 1879. The Homer mining district was organized in 1879. The property was held under 20 mining claims, one patented and 19 unpatented, (23 claims also reported). Owners at various times included Thomas Hanna and R. T. Pierce, Martinez, California, E. F. Smith, New York, and A. H. Heller, Pasadena, California. In 1942, mine equipment was sold per a judgment against Thomas R. Hanna and Wanda Muir Hanna, one of two daughters of naturalist, John Muir. The May Lundy Mine was named for the daughter of W. J. Lundy, operator of a sawmill that supplied timber to the Bodie mining district in the 1870s. The May Lundy Mine was worked on a "major" scale until the early 1900s. Continuous activity occurred from 1879-1885; the mine was idle during a period in 1885-1886; activity resumed from 1887-1898. The mine operated at intervals during 1898-1914. In 1937, a 140-ton flotation plant was installed to treat an estimated 60,000 short tons of accumulated tailings, reportedly worth $4.23 per ton in gold (equivalent to 0.121 troy ounces gold per short ton at $35 per ounce) from a 20-stamp mill that operated prior to that time; minor prospecting occurred thereafter. The mine produced a total of $3 million (Clark, 1998), equivalent to approximately 145,000 troy ounces (4.51 metric tons) gold at a price of $20.67 per troy ounce (price of gold during the period of major production). Milling-grade ore reportedly yielded as much as one troy ounce gold per short ton with a "high silver content." On the basis of an ore grade of one troy ounce gold per short ton, value of bullion equal to $13.00 to $17.00 (average $15.00) per troy ounce, an estimated gold:silver ratio of 1:11, and reported total value of bullion produced for various periods, this MRDS reporter estimates the following: Total gold and silver production for the May Lundy Mine, 1880-1937 (includes 1899-1914 intermittent operations): Gold production, 98,047 (98,000) troy ounces (3 metric tons); Silver production, 1,078,517 (1,078, 500) troy ounces (33.5 metric tons). Total estimated value of gold and silver production (this MRDS reporter) is $2.9 million (compare with $3 million of Clark, 1998).

Mineralization is a vein deposit (Deposit model code 273; USGS model code 36a; Deposit model name: Low-sulfide Au-quartz vein; Mark3 model number 27) hosted in slate and Late Cretaceous granodiorite (biotite-hornblende). The ore body is tabular. Controls for ore emplacement was open-space filling along steeply-dipping faults, fractures; high-grade ore shoots along faults, fractures. Alteration is local (silicic). Depth of mineralization approximately 1,500 feet. Associated rocsk include rocks from the Virginia Lakes sequence (hornfels, quartzite, chert & conglomerate). Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Regional geologic structures include North-northwest-trending folds with steeply dipping limbs; north-northwest, steeply southwest-dipping faults/fractures.

Geology: The principal geologic feature in the May Lundy Mine area is a 2- to 4-mile-wide (3.2- to 6.4-km-wide) roof pendant of metamorphic rocks that extends northwest along the Sierra crest for many miles. According to Schweickert (1981) and others cited in Schweickert (1981), these rocks comprise the Sattlebag Lake pendant of presumed and known lower Paleozoic strata characterized by the presence of bedded chert, argillite, limestone, and quartzite, and metavolcanic and plutonic rocks of an early Mesozoic Andean-type magmatic arc. Brook (1977; cited in Schweickert, 1981) suggests that the unfossiliferous lower Paleozoic rocks of the Saddlebag Lake pendant are lithologically and structurally correlative with the fossiliferous Ordovician and Silurian strata of the Mount Morrison pendant 50 km (31 miles) to the southeast. Brook and others (1979; cited in Schweickert, 1981) have also identified upper Paleozoic rocks in this area. The lower Paleozoic (?) rocks at Saddlebag Lake resemble the "lower" Shoo Fly, recognized 50 km (31 miles) west in the west limb of the Nevadan synclinorium. Both the Shoo Fly in the northwestern Sierra Nevada and the lower (?) Paleozoic rocks of the Saddlebag Lake and June Lake pendants are unconformably overlain by Triassic and Jurassic volcanic and sedimentary rocks that lie in the core of the synclinorium. These relationships, together with the lithostratigraphic similarities, suggest that the lower Paleozoic rocks in the eastern Sierra Nevada between latitudes 37?30' and 38?N can be considered part of the Shoo Fly Complex (Schweickert, 1981). Metavolcanic and plutonic rocks of an early Mesozoic Andean-type magmatic arc occupy a region up to 150 km (94 miles) wide extending from the eastern Klamath Mountains to the Mojave Desert. South of latitude 39?N, metavolcanic and metasedimentary rocks of Late Triassic to Middle Jurassic age lie generally west of exposures of coeval plutonic rocks, and have been invaded by younger plutonic rocks of the Sierra Nevada Batholith. The metavolcanic rocks are heterogeneous assemblages of lava, tuff, and breccia of basaltic to rhyolitic composition, locally interbedded with greywacke, siltstone, conglomerate, and limestone. Evidence suggests that much of the volcanism was subaerial, although the existence of marine fossils and interbedded submarine tuff, turbidites, and limestone, indicates marine conditions near of adjacent to volcanic centers. On the western limb of the Nevadan synclinorium, the metavolcanic rocks unconformably overlie Paleozoic rocks on the north fork of the American River. On the eastern limb, in the Saddlebag Lake, Ritter Range, and Mount Morrison pendants, the same unconformity occurs (Schweickert, 1978, cited in Schweickert, 1981). On a regional tectonic scale, the Saddlebag Lake pendant appears to represent a portion of an older Jurassic-Triassic volcanoplutonic arc system, which has been overprinted by a younger Cretaceous volcanoplutonic arc system.

Ore Deposits: Quartz veins associated with the May Lundy Mine occur in a body of Cretaceous-age biotite-hornblende granodiorite that forms the core of a north-trending regional anticline in Jurassic-age metasedimentary rocks (Chesterman, 1975). The veins strike north-northwesterly and dip steeply to the southwest. The mine is on the west flank of the anticline, which is also the east flank of a regional north-northwest-trending syncline that sub-parallels the anticline. The biotite-hornblende granodiorite is light- to medium-gray, medium- to coarse-grained, and grades locally into biotite granite. K-Ar determinations on the hornblende in samples collected in the unit from the Mono Craters Quadrangle yield ages of about 85 million years (late Cretaceous; Evernden and Kistler, 1970, p. 10, cited in Chesterman (1975). A short distance west of the mine, are north-northwest-striking, Jurassic-age metasedimentary rocks that dip steeply to the southwest toward the axis of the above-mentioned north-northwesterly-trending syncline. These rocks consist of bedded, banded, light-gray, brown to dark-gray siltstone, sandstone, chert, minor conglomerate, all metamorphosed to quartzofeldspathic hornfels, calc-silicate hornfels, quartzite, metachert, and metaconglomerate (Chesterman, 1975). The quartz veins of the May Lundy lode reportedly vary from a few inches to several feet in thickness, strike north-northwesterly, dip steeply southwesterly, and average two to three feet (0.6 to 0.9 m) in thickness; widths of 10 to 14 feet (3 to 4.3 m) are reported for portions of the veins in underground workings. From the literature, these veins appear to be oriented subparallel to the contact between the granodiorite and metasedimentary rocks. The ore contains free (sometimes visible) gold, electrum, auriferous pyrite, pyrite, chalcopyrite, galena, sphalerite, magnetite, arsenopyrite, minor native copper, and oxidized minerals in the upper portions of the veins. These minerals occur in a gangue of crystalline quartz stained with iron oxides. Milling-grade gold ore reportedly yielded as much as one troy ounce gold per short ton with a "high silver content." Concentrates also reportedly carried as much as four troy ounces gold per short ton, and tailings carried $1.05 in gold (0.051 troy ounces gold per short ton at a gold price of $20.67). Several ore shoots at the May Lundy Mine had stoping lengths of up to 300 feet (91 m). The value the bullion produced from the ores reportedly varied from $13 to $17 per troy ounce. There are two principal gold-bearing quartz veins at the May Lundy Mine. The May Lundy Vein is about 3.5 feet (1 m) wide in the lower part and 2.5 feet (0.8 m) wide in the upper part, and can be traced for 6000 feet (1829 m) along strike. The West Vein has a strike length of about 3000 feet (914 m). Both veins generally vary from 2 to 4 feet (0.6 to 1.2 m) in width, strike northwesterly, and dip from 45? to 50? to the southwest. The main working tunnel (Lake View tunnel) crosscuts the May Lundy Vein 1500 feet (457 m) below the outcrop. In the May Lundy Mine, a series of smaller quartz veins appear to be cut-off by the May Lundy and West veins. These smaller veins strike more northerly to northeasterly than the May Lundy and West veins, and dip at high angles to the east. These smaller veins appear to be faulted along the structures along which the northwesterly-striking May Lundy and West veins formed. The smaller veins appear to be contemporaneous with prominent fractures having the same general orientation as the smaller veins. These faulted veins are from a few inches to two feet in width and do not appear to be ore carriers except near their intersections with richer portions of the main veins of the May Lundy lode.

Age of Mineralization: The geologic setting, host-rock age (85 million years), ore-deposit type, and mineralization at the May Lundy Mine suggest a Mesozoic age for the gold and silver mineralization -- mineralization consistent with a Cretaceous volcanoplutonic arc system. Marsh and others (2007) present data that show that the gold in the Sierra foothills formed ca. 125?10 Ma (Lower Cretaceous), including deposits of the highly productive Mother Lode belt. Mineralization at the May Lundy Mine appears to be younger, occurring in a host rock with hornblende age of about 85 million years (Upper Cretaceous).

Workings include underground openings.

Workings at the May Lundy Mine include drifts, crosscuts, raises, winzes, and stopes. The four main tunnels at the May Lundy Mine include: tunnels #1, #2, and #3, all driven on the lode, and the Lake View Tunnel that crosscuts and drifts along the May Lundy vein. Various reports are not entirely consistent with regard to descriptions of the mine workings; all mine records were reportedly destroyed by fire. The following is a synthesis of the various reports and a cross-section through the mine workings constructed by the MRDS reporter from the Dunderberg Peak 24K topographic map: #1 Tunnel (uppermost tunnel): 115 feet (35 m) long; driven along the vein; stoped to the surface along much of its length. #2 Tunnel: 900 feet (270 m) long; driven along the vein; situated 130 feet (40 m) below the #1 Tunnel; stopes driven 200 feet (60 m) upward to the #1 Tunnel. #3 Tunnel: 1400 feet (420 m) long; driven along the vein; situated 200 feet (61 m) below the #2 Tunnel; stopes 400 feet (120 m) long connect to the #2 Tunnel; three winzes sunk on the vein from the #3 Tunnel, the deepest of which is 160 feet (48 m). A level reportedly 200 feet (60 m) above lowest adit [might refer to workings from a raise above the Lake View Tunnel level or may be an error]: This level reportedly has 1400 feet (420 m) of drifts (same as #3 Tunnel). Lake View Tunnel (lowermost tunnel): reportedly 4000 feet (1219 m) long, crosscuts the May Lundy Vein 1500 feet (457 m) below the outcrop, drifts 1800 feet (549 m) to the north on the May Lundy vein; also reported: 3900 feet (1170 m) long, crosscuts the vein at 3100 feet [therefore drifts 800 feet (240 m) on the vein (?)].

Production data are found in: Tucker & Sampson (1940) and in Goodwin (1957).

Commodity Info: Ore Grade: Milling-grade gold ore reportedly yielded as much as one troy ounce Au per short ton with a "high silver content" (silver price averaged $1.108 per troy ounce silver between 1880 and 1884). Concentrates also reportedly carried as much as 4 troy ounces Au per short ton, and tailings carried $1.05 in Au (0.051 troy ounces Au per short ton at a Au price of $20.67). The value of bullion produced from the ores reportedly varied from $13 to $17 per troy ounce from ore mined from 1880-1884. Gold:silver ratio was 1:11 (estimated by the MRDS reporter) [average bullion value of $15 per troy ounce; assume gold plus silver, no copper or other metals, ore grade of 1.0 troy ounce gold per short ton].

Miscellaneous locality information: •The location point selected for latitude and longitude is the prospect symbol located immediately west of the map label "May Lundy Mine" on the 7.5-minute Dunderburg Peak quadrangle. The 1:100,000-scale map has an adit symbol labeled "May Lundy Mine", located 0.18 mile (0.29 km) 18.1? NE of the prospect symbol labeled "May Lundy Mine" on the 1:24,000-scale quadrangle, placing the adit just north of the boundary of the Hoover Wilderness. The older Matterhorn Peak 15-minute quadrangle shows several adits for the May Lundy Mine. The main upper workings of the May Lundy Mine, some of which are shown and labeled "May Lundy Mine" on the 1:24,000-scale quadrangle, and the Lake View Tunnel entrance to the mine (crosscut), also shown and labeled "May Lundy Mine" on the 1:24,000-scale quadrangle, are within the Hoover Wilderness immediately south of the wilderness boundary. To reach the deposit from the junction of U.S. 395 and Lundy Lake Road located 6 miles (9.6 km) north of Lee Vining, travel about 3.4 miles (5.4 km) west on Lundy Lake Road to the junction with a road that forks to the south and ends at a parking area at the Hoover Wilderness trailhead near the south end of the Lundy Lake dam. The foot trail (formerly a jeep road; wheeled vehicles no longer permitted) gains 900 feet (270 m) in elevation over 1.5 miles (2.4 km) westward as it nearly parallels the south side of Lundy Lake before heading south into Lake Canyon. The trail continues 1.5 miles (2.4 km) southward gaining another 920 feet (276 m) in elevation at the large mine dump just beyond the May Lundy Mine's Lake View Tunnel entrance (elevation 9600 feet, 2880 m; lowest May Lundy Mine workings; entrance caved). The upper May Lundy Mine workings are located on the steep ridge west of the Lake View Tunnel, at elevations ranging from about 10,600 feet (3280 m) to 11,000 feet (3300 m). The trail crosses the Hoover Wilderness boundary about 0.14 mile (0.22 km) north of the Lake View Tunnel entrance, and all of the main May Lundy Mine workings are located within the wilderness. The mine is not accessible in winter due to closure of Lundy Lake Road following the first heavy fall/winter snowstorms (area visited by this MRDS reporter on September 27, 2007; upper mine workings not visited).

Production estimates by the MRDS reporter, based on estimated gold/silver ratio, ore grade in gold, value of bullion produced, gold and silver prices; values rounded to nearest one hundred (in parenthesis): 1880-1884: $837,000 in bullion; 25,472 (25,500) troy ounces (0.79 metric tons) gold; 280,192 (280,200) troy ounces (8.72 metric tons) silver; average 5094 (5100) troy ounces (0.16 metric tons) gold per year; average 56,038 (56,000) troy ounces (1.74 metric tons) silver per year. 1887-1888: $39,000 in bullion; 1252 (1300) troy ounces (0.04 metric tons) gold; 13,772 (13,800) troy ounces (0.43 metric tons) silver; average 626 (600) troy ounces (0.02 metric tons) gold per year; average 6886 (6900) troy ounces (0.21 metric tons) silver per year. 1889-1898: $1,124,000 in bullion; 38,625 (38,600) troy ounces (1.20 metric tons) gold; 424,875 (424,900) troy ounces (13.22 metric tons) silver; average 3863 (3900) troy ounces (0.12 metric tons) gold per year; average 42,488 (42,500) troy ounces (1.32 metric tons) silver per year. 1937: 60,000 short tons (54,431 metric tons) mill tailings; $4.23 per ton in gold; 7260 (7300) troy ounces (0.23 metric tons) gold; 79,860(?) (79,900(?)) troy ounces (2.49 metric tons) silver. Totals for 1880-1937, excluding 1899-1914 intermittent operations: Gold production, 72,609 (72,600) troy ounces (2.26 metric tons); Silver production, 798,699 (798,700) troy ounces (24.84 metric tons). Total value of gold and silver production: reportedly as much as $2 million (does not include recoveries from mill tailings in 1937) ($2,312,676 estimate by this MRDS reporter; compare with $3 million total of Clark, 1998). 1899-1914, intermittent operations: The difference between this MRDS reporter's estimates and Clark's (1998) estimate can be explained by including production from intermittent operations from 1899-1914 (which is unknown) and by an overestimate of production by Clark. If Clark is correct, a production value of $687,324 to $1 million for the period 1899-1914 is unaccounted for, equating to an estimated 25,438 (25,400) troy ounces (0.79 metric tons) gold and 279,818 (279,800) troy ounces (8.70 metric tons) silver production during this period [average annual gold production 1590 (1600) troy ounces (0.05 metric tons) for this period; average annual silver production 17,490 (17,500) troy ounces (0.54 metric tons) for this period]. These values appear to be high but place an upper limit on gold and silver production at the May Lundy Mine. Total gold and silver production for May Lundy Mine, 1880-1937; includes 1899-1914 intermittent operations (this MRDS reporter): Gold production, 98,047 (98,000) troy ounces (3.0 metric tons); Silver production, 1,078,517 (1,078, 500) troy ounces (33.5 metric tons).

Ore Processing: Prior to 1894, ore was processed using a 10-stamp mill (owned by the May Lundy Company) at Lundy, where 50% of the gold was caught in the battery mortars; the remainder was amalgamated on electro silver-plated copper plates. Tailings were passed over blanket sluices and the rich "pyritous sands" from these were "treated raw" with quicksilver and without other chemicals other than a "very little crude soda" in two Washoe pans. The mill was driven by a Leffel turbine, 17.5 inches (44.5 cm) in diameter, under an effective head of 28 feet (8.5 m). Ore was transported to the mill by a tramway 3500 feet (1067 m) long from the lowest tunnel to the floor of Lake Canyon. From there, the ore was hauled in wagons by a difficult-to-maintain road 5 miles (8 km) to the mill. Snowslides often damaged the tram. The mill suspended operations in 1884; from 1887-1888, a few miners under lease produced ore from the May Lundy using a custom 2-stamp mill in Lake Canyon; mules were used to haul ore down the mountain to the mill. A 10-stamp mill reportedly was built by the Jackson and Lakeview Mining Company at the base of the tramway to the May Lundy Mine in 1894. In 1900, the May Lundy Mine was bought by the Crystal Lake Gold Mining Company, and the mill was expanded to 20 stamps. The circuit at this mill included an Allen crusher, Dorr Thickener, storage tanks, duplex Dorr Classifier, Allis-Chalmers ball mill, 6-cell Kraut flotation machines, Kraut cleaner cell, and Amico filter. Power was supplied by a hydroelectric plant on Mill Creek 2 miles (3.2 km) south of the mill. The plant had a Pelton wheel and 250 KVA generator. The power line to the mill was 10,200 feet (3109 m) long.

Mineral List

7 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

Tertiary - Lopingian
2.588 - 259.9 Ma

ID: 2917727
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]

66 - 145 Ma

ID: 2536743
Granitic rocks, undivided

Age: Cretaceous (66 - 145 Ma)

Description: Miscellaneous bodies of granitic rock of unknown age and affinity, but probably all of Cretaceous age

Comments: Fine Gold Intrusive Suite

Reference: Huber, N.K., Bateman, P.C., Wahrhaftig, C. Geologic Map of Yosemite National Park and Vicinity, California: a digital database. USGS Miscellaneous Investigations Series I-1874. [84]

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

This page 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.


Emmons and Becker (1885), Statistics and Technology of the precious Metals. Census reports, Tenth census. June 1, 1880, Volume 13, by United States Census office. 10th census, 1880, United States. Census Office.

Whiting, H.A. (1888), Homer Mining District: California State Mining Bureau, Report 8 of the State Mineralogist (Report 8): 367-371.

Eakle, Arthur Starr & R.P. McLaughlin (1919), Mono County: California Mining Bureau. Report 15: 170-171.

Tucker, W. Burling (1927), Los Angeles, Mono Counties: California Journal of Mines and Geology, California Mining Bureau. (Report 23): 23: 287-345, 385-386.

Tucker, W.B., and Sampson, R.J. (1940), Mineral Resources of Mono County: California Journal of Mines and Geology; California Division of Mines (Report 36): 36(2): 11, 128-129, Pl. 1.

Engineering and Mining Journal (Engineering & Mining Journal) (1945) (August): 18.

Engineering and Mining Journal (Engineering & Mining Journal) (1945) (October): 121.

Engineering and Mining Journal (Engineering & Mining Journal) (1946) (February): 18.

Evernden, J. F., and Kistler, R. W. (1970), Chronology of emplacement of Mesozoic batholithic complexes in California and western Nevada: USGS Professional Paper 623.

Chesterman, C. W. (1975), Geology of the Matterhorn Peak 15-minute Quadrangle, Mono and Tuolomne counties, California: California Division of Mines and Geology Map Sheet MS 022, scale 1:62,500.

Saleeby, Jason (1981), Ocean floor accretion and volcanoplutonic arc evolution of the Mesozoic Sierra Nevada, in: Ernst, W. G., Editor, 1981, The Geotectonic Development of California, Rubey Volume 1, Prentice-Hall, Englewood Cliffs, New Jersey 07632, p. 132-181.

Schweickert, R. A. (1981), Tectonic evolution of the Sierra Nevada Range, Roof pendants in the eastern and southern Sierra Nevada, in: Ernst, W. G., Editor, 1981, The Geotectonic Development of California, Rubey Volume 1, Prentice-Hall, Englewood Cliffs, New Jersey 07632, p. 87-131.

Zilka, N.T., and Leszcykowski, A.M. (1981), U.S. Bureau of Mines, unpublished file data.

U.S. Bureau of Mines Open-File Report MLA 49-82 (1982): Pl. 1, No. 60.

Clark, W. B. (1998), Gold Districts of California, California Gold Discovery to Statehood: California Division of Mines and Geology Bulletin 193, Sesquicentennial Edition, p. 64-65.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10211874, 10310710, 10086471.

Marsh, Erin, Goldfarb, Richard, Bierlein, Frank, Kunk, Mick (2007), New constraints on the timing of gold formation in the Sierra Nevada foothills province, central California [abstract]: Arizona Geological Society Symposium: Ores & Orogenesis, Circum-Pacific Tectonics, Geologic Evolution, and Ore Deposits; Tucson, Arizona, September 24-30, 2007, Poster Session presentation no. 33, abstract ID 168.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060510035.

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