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Monte Cristo Mine (West Vein lease), Monte Cristo Canyon, Acton, Acton District, San Gabriel Mts, Los Angeles Co., California, USAi
Regional Level Types
Monte Cristo Mine (West Vein lease)Mine
Monte Cristo CanyonCanyon
Acton- not defined -
Acton DistrictMining District
San Gabriel MtsMountain Range
Los Angeles Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84): 34° 21' 11'' North , 118° 5' 12'' West
Latitude & Longitude (decimal): 34.35306,-118.08667
GeoHash:G#: 9qh52vgcj
Locality type:Mine
Köppen climate type:Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Acton7,596 (2014)16.5km
Vincent15,922 (2011)16.6km
Altadena42,777 (2011)18.6km
La Crescenta-Montrose19,653 (2011)19.2km
La Cañada Flintridge20,246 (2011)19.5km


A Au-Mo prospect located in sec. 15, T3N, R12W, SBM, in the Monte Cristo Canyon, western San Gabriel Mountains, about 11½ miles SE of Acton.

Regions containing this locality

Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


3 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: Lath-like
Description: Occurs as lath-shaped crystals to several cm hosted in anorthosite.
Reference: Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 36-37; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 361.
Albite var: Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Habit: Lath-like
Description: Occurs as lath-shaped crystals to several cm hosted in anorthosite.
Reference: Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 36-37; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 361.
Molybdenite
Formula: MoS2
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 251; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 80, 361.
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
var: Andesine-(Na,Ca)[Al(Si,Al)Si2O8]

List of minerals for each chemical element

OOxygen
O Albite (var: Andesine)(Na,Ca)[Al(Si,Al)Si2O8]
O AlbiteNa(AlSi3O8)
NaSodium
Na Albite (var: Andesine)(Na,Ca)[Al(Si,Al)Si2O8]
Na AlbiteNa(AlSi3O8)
AlAluminium
Al Albite (var: Andesine)(Na,Ca)[Al(Si,Al)Si2O8]
Al AlbiteNa(AlSi3O8)
SiSilicon
Si Albite (var: Andesine)(Na,Ca)[Al(Si,Al)Si2O8]
Si AlbiteNa(AlSi3O8)
SSulfur
S MolybdeniteMoS2
S PyriteFeS2
CaCalcium
Ca Albite (var: Andesine)(Na,Ca)[Al(Si,Al)Si2O8]
FeIron
Fe PyriteFeS2
MoMolybdenum
Mo MolybdeniteMoS2

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

Cretaceous
66 - 145 Ma



ID: 3192002
Mesozoic intrusive rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Proterozoic
541 - 2500 Ma



ID: 2668335
Anorthosite

Age: Proterozoic (541 - 2500 Ma)

Description: Medium- to very coarse-grained plagioclase rock; light gray and white; contains more than 90 percent plagioclase (andesine) and less than 10 percent mafic minerals (mostly hypersthene); grain size ranges from less than 1 mm to more than 30 cm. Associated facies include diorite, norite, and gabbro. Anorthosite and gabbro are pervasively shattered, sheared and brecciated. Barth and others (1995) indicate a general age of 1,200 Ma on the basis of dated zircons and thermobarometry, substantially older than 930 ± 90 Ma and 810 ± 80 Ma lead-alpha zircon ages determined by Neuerburg and Gottfried (1954). Oakeshott (1958) considered “anorthosite-gabbro complex” a result of differentiation of a single parent magma, and separated the relatively uniform “anorthosite” from a more heterogeneous map unit termed “gabbroic and noritic rocks”. Widespread in northwestern San Gabriel Mountains (Oakeshott, 1958; Jahns and Muehlberger, 1954; Ehlig, 1981)

Reference: Alvarez, R.M. and K.R. Bovard. Preliminary Geologic Map of the Los Angeles 30' x 60' Quadrangle, Southern California. U.S. Geological Survey Open-File Report 2005-1019. [112]

Ectasian
1200 - 1400 Ma



ID: 2867794
Precambrian granitic rocks, unit 2, (San Gabriel Mountains Anorthosite)

Age: Ectasian (1200 - 1400 Ma)

Description: Precambrian granite, syenite, anorthosite, and gabbroic rocks in the San Gabriel Mountains; also various Precambrian plutonic rocks elsewhere in southeastern California

Comments: San Gabriel Mountains. Anorthosite-Syenite Complex Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{anorthosite,gabbro}, Minor:{syenite}

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]

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
California Journal of Mines and Geology (1937): 33: map of mines and oil fields of Los Angeles County: 186-197, map No. 41.
California Journal of Mines and Geology (1954): 50: 499.
Sharp, W.E. (1959) Minerals from Los Angeles County, California. Printed privately, Los Angeles, California: 36-37, 88, 109.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 251.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 80, 361.


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