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Bird Rock claim (Bird Rock deposit; W. M. Keenan), Lawson Peak, Los Terrenitos, Laguna Mts, San Diego Co., California, USAi
Regional Level Types
Bird Rock claim (Bird Rock deposit; W. M. Keenan)Claim
Lawson PeakPeak
Los Terrenitos- not defined -
Laguna MtsMountain Range
San Diego Co.County
CaliforniaState
USACountry

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Latitude & Longitude (WGS84): 32° 38' 9'' North , 116° 44' 42'' West
Latitude & Longitude (decimal): 32.63583,-116.74500
GeoHash:G#: 9mucxmhvs
Locality type:Claim
Köppen climate type:Csa : Hot-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Rancho de sus Niños108 (2014)10.4km
Paso del Águila292 (2013)12.7km
Potrero656 (2011)12.8km
Lomas de Santa Anita6,604 (2014)13.6km
Tecate64,764 (2018)13.6km


A REE-U occurrence/prospect located in secs. 1 & 2, T17S, R2E, SBM, on the W side of Lawson Peak and 2½ miles NE of Lyons Peak.

Mineralization is hosted in a weathered pegmatite.

Regions containing this locality

Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

'Fergusonite'
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 180, 319.
'Monazite'
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 319.
Samarskite-(Y)
Formula: (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Habit: Well-terminated crystals in sheaflike clusters
Description: Occurs in clusters of crystals to 5 x 7 cm.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 180, 319.
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Colour: Yellow
Description: Occurs as films on fractures of a weathered pegmatite.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 516.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Samarskite-(Y)4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Group 9 - Silicates
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Unclassified Minerals, Rocks, etc.
'Fergusonite'-
'Monazite'-

List of minerals arranged by Dana 8th Edition classification

Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Unclassified Minerals, Mixtures, etc.
'Fergusonite'-
'Monazite'-

List of minerals for each chemical element

HHydrogen
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
OOxygen
O Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
SiSilicon
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
CaCalcium
Ca Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
FeIron
Fe Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
YYttrium
Y Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
NbNiobium
Nb Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
TaTantalum
Ta Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
ThThorium
Th Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
UUranium
U Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

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: 3186295
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]

Late Cretaceous - Middle Jurassic
66 - 174.1 Ma



ID: 2897782
Mesozoic granitic rocks, unit 2 (Peninsular Ranges)

Age: Mesozoic (66 - 174.1 Ma)

Stratigraphic Name: Bonsall Tonalite; Bradley Granodiorite; Cactus Quartz Monzonite; Cajalco Quartz Monzonite; Corona Hornblende Granodiorite Porphyry; Domenigoni Valley Granodiorite; Escondido Creek Leucogranodiorite; Estelle Tonalite; Fargo Canyon Diorite; Green Valley Tonalite; Home Gardens Quartz Monzonite Porphyry; Indian Mountain Leucogranodiorite; Lakeview Mountain Tonalite; Lake Wolford Leucogranodiorite; La Sierra Tonalite; Mount Hole Granodiorite; Rattlesnake Granite; Roblar Leucogranite; San Jacinto Granodiorite; Stonewall Quartz Diorite; Woodson Mountain Granodiorite

Description: Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Comments: Peninsular Ranges. Primarily tonalite, granodiorite, and minor quartz monzonite and granite. Emplacement ages mostly 80 to 105 Ma in eastern part of area and 105 to 140 Ma in western part; minor Jurassic rocks in central part 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:{tonalite}, Minor:{quartz diorite,granodiorite,quartz monzonite}, Incidental:{granite, pegmatite}

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]

Early Cretaceous
100.5 - 145 Ma



ID: 3125972
Santiago Peak Volcanics

Age: Early Cretaceous (100.5 - 145 Ma)

Stratigraphic Name: Santiago Peak Volcanics

Description: Dacitic and andesitic breccia, tuff, and flows, and lesser basalt and rhyolite. Unmetamorphosed to slightly metamorphosed

Reference: Todd, V.R. Preliminary Geologic Map of the El Cajon 30' x 60' Quadrangle, Southern California. U.S. Geological Survey Open-File Report 2004-1361. [144]

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)
Weber, F.H., Jr. (1963a) Mines and mineral resources of San Diego County, California. California Division of Mines and Geology County Report 3, 309 pp.: No. 474: 281.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 180, 319, 516.


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