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Marguerite Mine, Auburn, Ophir Mining District (Auburn Mining District; Duncan Hill Mining District), Placer County, California, USAi
Regional Level Types
Marguerite MineMine
Auburn- not defined -
Ophir Mining District (Auburn Mining District; Duncan Hill Mining District)Mining District
Placer CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
38° 55' 13'' North , 121° 4' 23'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
North Auburn13,022 (2011)1.4km
Auburn13,953 (2017)2.7km
Cool4,100 (2017)6.2km
Newcastle1,224 (2011)7.3km
Meadow Vista3,217 (2011)10.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Roseville Rock RollersRoseville, California26km
El Dorado County Mineral and Gem SocietyPlacerville, California32km
Gold Country Treasure SeekersPlacerville, California32km
Nevada County Gem & Mineral SocietyGrass Valley, California33km
Fossils for Fun Society, Inc.North Highlands, California37km
Mindat Locality ID:
85553
Long-form identifier:
mindat:1:2:85553:7
GUID (UUID V4):
d5144fac-90b6-4bfd-8ad0-a1b7fdecfe6c


A former Au-Cu-Pb occurrence/mine located in the NE¼SW¼ and in the SE¼NW¼ (estimated) sec. 3, T12N, R8E, MDM, 2.6 km (1.6 miles) N of Auburn, along Auburn Ravine, on private (patented) land. The property comprises 60 acres. MRDS database stated accuracy for this location is 500 meters.

Mineralization is a vein deposit hosted in serpentinite. The ore body strikes NW and dips 80SW at a thickness of 1.52 meters. The vein is 5 feet thick and carries 7% sulfides. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).

Workings include underground openings with an overall depth of 94.49 meters and comprised of a shaft.

The ore averaged an estimated $3.50 (period values) per ton.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


6 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Phengite9.EC.15KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
var. Mariposite9.EC.15K(Al,Cr)2(Al,Si)4O10(OH)2

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
H Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
OOxygen
O MuscoviteKAl2(AlSi3O10)(OH)2
O Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
O QuartzSiO2
O Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
MgMagnesium
Mg Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Al Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Si QuartzSiO2
Si Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
SSulfur
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
K Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
CrChromium
Cr Muscovite var. MaripositeK(Al,Cr)2(Al,Si)4O10(OH)2
FeIron
Fe ChalcopyriteCuFeS2
Fe Muscovite var. PhengiteKAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
AuGold
Au GoldAu
PbLead
Pb GalenaPbS

Other Databases

Link to USGS MRDS:10101340

Other Regions, Features and Areas containing this locality


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

 
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