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Evening Star Mine (Maynard Mine; Bernice group; Bernice Mine; Rex Tin Mine; Standard District; Blue Grass), Kessler Peak, Ivanpah Mountains, Ivanpah Mining District, San Bernardino Co., California, USAi
Regional Level Types
Evening Star Mine (Maynard Mine; Bernice group; Bernice Mine; Rex Tin Mine; Standard District; Blue Grass)Mine
Kessler PeakPeak
Ivanpah MountainsMountain Range
Ivanpah Mining DistrictMining District
San Bernardino Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
35° 21' 36'' North , 115° 32' 27'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


A former Cu-Au-Sn-W-Zn occurrence/mine located in secs. 24 & 25, T15N, R13E, SBM, about 5.3 km NNW of Kessler Peak, on the western margin of the Ivanpah Mountains, 4 km E of Cima Road and about 12 km S of Interstate 40 (8 miles N of Cima; 7½ miles S of Mountain Pass), on private land. This area is now in the Mojave National Preserve (wilderness area). Discovered about 1940. Produced during the periods 1939 to 1940 and 1942 to 1944. MRDS database stated accuracy for this location is 10 meters. Though previously prospected, tin ore was not discovered at the Evening Star Mine until 1940.

Mineralization is hosted in the Goodsprings dolomite close to the thrust contact with the Teutonia quartz monzonite. The ore body strikes N80W and dips 30S at a thickness of 28 meters, a width of 3 meters and a length of 28 meters. Ore body No. 1 is a pipe-like fissure vein and ore body No. 2 is an irregular replacement body. The primary mode of origin was hydrothermal activity and the secondary mode of origin was contact metasomatism. Primary ore control was fracturing. Wallrock alteration is slight (pyritization). The area of principal tungsten mineralization is along a sinuous granite-limestone contact exposed a quarter mile SE of the tin workings. Cu is from a Cu-bearing siliceous vein. Minerals reported from the mine are calcite, cassiterite, chalcopyrite, epidote, forsterite, magnetite, serpentine, scheelite, and tremolite. Most of these minerals are not well crystallized but well formed cassiterite crystals in excess of 1 cm have been recovered. Associated rocks include Late Cretaceous-Pennsylvanian granite. Local rocks include Carboniferous marine rocks, unit 2 (SE California Carbonate Assemblage) and/or Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include surface and underground openings comprised of several shallow shafts and many surface cuts (1951). From 1940 through 1943 the mine was explored by two shafts and underground workings, plus a trench between the two shafts. An old, 340 foot adit was being extended but no contact had been reached by February, 1952.

Some tin ore was treated during the period 1942 to 1944 but no figures are available. In 1949, 50 tons of Cu-bearing, siliceous vein material stockpiled. At least one shipment of low-grade ore was made from the mine.

Analytical data results: Ore grade at 6.27% Sn.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


7 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035358.
Cassiterite
Formula: SnO2
Description: Occurs in a vein in dolomitic limestone.
Reference: Tucker, W. B. & Sampson R. J. (1943), Mineral resources of San Bernardino County: California Journal of Mines and Geology, California Division Mines (Report 39): 39: 498; Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology: 49(1-2): 147; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 121; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 176; Rocks & Minerals (1942): 17: 381.
Chalcopyrite
Formula: CuFeS2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035358.
Pyrite
Formula: FeS2
Description: Occurs as an alteration product.
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10236971.
Scheelite
Formula: Ca(WO4)
Description: Occurs in a vein in dolomitic limestone.
Reference: Tucker, W. B. & Sampson R. J. (1943), Mineral resources of San Bernardino County: California Journal of Mines and Geology, California Division Mines (Report 39): 39: 498; Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology: 49(1-2): 147; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 121; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 176.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035358.
Wollastonite
Formula: CaSiO3
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035358.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Wollastonite9.DG.05CaSiO3

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Cassiterite4.4.1.5SnO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2

List of minerals for each chemical element

HHydrogen
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O CassiteriteSnO2
O ScheeliteCa(WO4)
O CalciteCaCO3
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O WollastoniteCaSiO3
MgMagnesium
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
SiSilicon
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si WollastoniteCaSiO3
SSulfur
S PyriteFeS2
S ChalcopyriteCuFeS2
CaCalcium
Ca ScheeliteCa(WO4)
Ca CalciteCaCO3
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca WollastoniteCaSiO3
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
SnTin
Sn CassiteriteSnO2
WTungsten
W ScheeliteCa(WO4)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rocks & Minerals (1942): 17: 381.
Wimmler, N. L. (1942), Preliminary Report on the Evening Star or Maynard Property, San Bernardino County, California, unpublished report, Mineral Property file 72.9 1942.
Tucker, W. B. & Sampson R. J. (1943), Current Mining Activity in Southern California: California Journal of Mines and Geology, California Division Mines (Report 39): 39: 118-141, 130, 498-499.
Tucker, W. B. & Sampson R. J. (1943), Mineral resources of San Bernardino County: California Journal of Mines and Geology, California Division Mines (Report 39): 39: 484, 485, 498-499.
Page, Lincoln Ridler & Weise, J.H. (1945), The Evening Styar Tin Deposit and Adjacent Tungsten Deposits, San Bernardino County, California, Geological Survey manuscript 1945 (1959), 17 pp.
Bedford, R.H. & F.T. Johnson (1946), Survey of tin in California: US Bureau Mines Report of Investigation 3876, 14 pp.: 11.
Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology: 49(1-2): 147-148.
Hewitt D. F. (1956) Geology and Mineral Resources of the Ivanpah Quadrangle, California and Nevada. USGS Professional Paper 275, 157.
Gray, Clifton Herschel, Jr. (1957), Tin in: Mineral Commodities of California, California Division of Mines, Bulletin 176: 641-646.
Lemmon, Dwight Moulton and Tweto, O.L. (1962) Tungsten in the United States, exclusive of Alaska and Hawaii. USGS Mineral Investigative Resources Map MR-25.
Lemmon, Dwight Moulton, Tungsten deposits in the US; Vol. I, unpublished data.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 121.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 176.
U.S. Bureau of Mines (1990), Mineral Investigation of the East Mojave National Scenic Area, San Bernardino County, California: U.S. Bureau of Mines Open-File Report MLA 6-90: Volume 1, Table 2: No. 193, p. 104.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035358, 10107642 & 10236971.
U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060710358.

Other Databases

USGS MRDS Record:10035358

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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