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Hummingbird prospect, Alder Springs, Glenn County, California, USAi
Regional Level Types
Hummingbird prospectProspect
Alder SpringsGroup of Springs
Glenn CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
39° 38' 13'' North , 122° 36' 36'' West
Latitude & Longitude (decimal):
39.63694,-122.61000
GRN:
N27W68
Type:
Prospect
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Elk Creek163 (2011)7.0km
Paskenta112 (2011)28.1km
Stonyford149 (2011)29.6km
Flournoy101 (2011)34.8km
Artois295 (2015)35.6km
Mindat Locality ID:
76715
Long-form identifier:
mindat:1:2:76715:3
GUID (UUID V4):
0


A Mn occurrence/prospect located the NE¼NE¼ sec. 35 (May be in sec. 36, as in bulletin 152, but locations give it in sec. 35.), T21N, R7W, MDM, 10.0 km (6.2 miles) E of Alder Springs, along the Salt Creek, E of Sanhedrin Ridge, on National Forest land. Operated by L. D. Stall, H. A. and Raymond Butler. MRDS database stated accuracy for this location is 500 meters.

Mineralization is hosted in rocks of the Calaveras Formation (clastic sedimentary rock). The ore body strikes N55E and dips 50NW at a width of 1.22 meters and a length of 3.05 meters. Films and 1/8 inch veinlets of manganese oxide, chiefly psilomelane with some pyrolusite, occur in a bed 3 to 4 feet wide of massive, slaty chert. It is cut by quartz veinlets, ¼ inch thick.. It is overlain by a gray schistose sandstone and has a fault contact with a yellowish green sericite schist. Local rocks include Franciscan schist.

Workings include surface openings (open cut).

Too low a grade to be of economic value.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Colour: Yellowish green
Description: Occurs as sericite schist.
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Colour: Yellowish green
Description: Occurs as sericite schist.
ⓘ 'Psilomelane'
ⓘ Pyrolusite
Formula: Mn4+O2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘPyrolusite4.DB.05Mn4+O2
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PyrolusiteMn4+O2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
MnManganese
Mnⓘ PyrolusiteMn4+O2

Other Databases

Link to USGS MRDS:10030503

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #00602142
Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 59
O’Brien, J.C. & Lewis Timothy Braun (1952), Mines and mineral resources of Glenn County, California: California Journal of Mines and Geology (Report 48): 48(1): 50.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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