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Equestrian prospect, Ramona, Ramona Mining District, San Diego County, California, USAi
Regional Level Types
Equestrian prospectProspect
Ramona- not defined -
Ramona Mining DistrictMining District
San Diego CountyCounty
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° 3' 44'' North , 116° 47' 43'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
San Diego Country Estates10,109 (2011)6.3km
Ramona20,292 (2011)7.2km
San Pasqual2,041 (2018)15.1km
Julian1,502 (2011)18.1km
Hidden Trails750 (2008)22.9km


Setting:
A series of small pegmatite dikes up to 4 feet thick that strike north-northwest, and dip southwest, located in the S2NW4NE4 Sec. 8, T13S, R2E, SBM, 7.1 km (4.4 miles) ENE of Ramona. Elevation approx. 2316' AMSL. The deposit is on private land.

History:
During field work by the San Diego Mining Company in 1996, several shallow brush covered cuts were noticed while investigating a series of narrow pegmatites that are remarkably continuous, and traceable along the surface for a distance of well over 1000 feet. Indications of previously exploited miarolitic pockets were noted. The area immediately adjacent to the deposit was being used for horseback riding at the time.

These pegmatites primarily consist of orthoclase, albite, quartz, black tourmaline (schorl), with minor amounts of mica (muscovite), and almandine-spessartine garnets.

The oldest workings here probably represent the northernmost exploration efforts made by Samuel G. Ingle and Harry Titus, of San Diego, and Mr. Pray, of Escondido; dating back to July of 1903; and were within the land area covered by the original Lookout mining claim. Additional work may also be attributed to Dr. E. G. Logan and A. W. Pray, circa 1914.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
'Almandine-Spessartine Series'
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
'Feldspar Group'
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
'Mica Group'
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Orthoclase
Formula: K(AlSi3O8)
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Quartz
Formula: SiO2
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Almandine9.AD.25Fe2+3Al2(SiO4)3
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Almandine-Spessartine Series'-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Mica Group'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Almandine-Spessartine Series'-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Mica Group'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
OOxygen
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O Garnet GroupX3Z2(SiO4)3
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O SpessartineMn32+Al2(SiO4)3
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
NaSodium
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SpessartineMn32+Al2(SiO4)3
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si Garnet GroupX3Z2(SiO4)3
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SpessartineMn32+Al2(SiO4)3
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Kunz, G. F. (1905), Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau bulletin 37: p. 148-49.
Merrill, F. J. H. (1914), Geology and Mineral Resources of San Diego and Imperial Counties: Gems, Lithia Minerals. California State Mining Bureau, San Francisco, Cal. California State Printing Office, December. Chapter 1, pages 63, 72.
San Diego Mining Company (1996), Field investigations of the Sunshine Valley area; undocumented pegmatites and gemstone prospects. Ramona, San Diego County, California.

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