Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Sempe Mine (Sempa mine; Senpa mine; Senpe mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USAi
Regional Level Types
Sempe Mine (Sempa mine; Senpa mine; Senpe mine)Mine
Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill)Mountain
Pala- not defined -
Pala DistrictMining District
San Diego Co.County
CaliforniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Latitude & Longitude (WGS84):
33° 22' 41'' North , 117° 2' 26'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Rainbow1,832 (2011)10.6km
Temecula112,011 (2017)16.3km
Valley Center9,277 (2011)17.8km
Aguanga1,128 (2011)17.8km
Hidden Meadows3,485 (2011)18.2km


"Sempé"
—French, disassociation from the Latin 'Semper', meaning "Forever".

Setting:
The Sempe mine is located in the N2SE4 Sec. 24 T9S R2W SBM, situated on the northwest slope of Hiriart Mountain. The Sempe pegmatite dike is considered thick, strikes northward and dips 30 degrees west. Reports mention the shallow workings producing a small quantity of gem minerals including pink beryl (morganite) and quartz. Lepidolite and tourmaline is also noted to occur. The deposit was developed by several shallow cuts made along the exposure.

History:
The deposit was discovered and first located under the general mining laws by Bernardo Hiriart and Pedro Peiletch on June 7th of 1901. The claim was most likely named after Hiriart's drink of persuasion, Sempé Armagnac, a distinctive kind of brandy from the Aquitaine region of France, popularly advertised in the early 1900's. The Sempe was the first of three claims on the mountain made by the two Basque Frenchman between 1901 and 1902.

Not long after the date of the Sempe location, the surrounding vacant public lands were temporarily withdrawn and removed from mineral entry under the United States land and mineral laws pursuant to Secretarial Order dated January 24, 1903. This order was a temporary withdrawal pending acquisition of all private inholdings, including valid existing rights, for the benefit of the Pala Tribe, under Indian tract allotment pursuant to the Act of January 12, 1891.

In 1906, George F. Kunz described the development of the Sempe mine occurring along two ledges of pegmatite, with one cut yielding fine pink beryl, and the other cut producing white beryl. The mine was later acquired by Jim R. Fouch, head of the Universal Microphone Company of Inglewood. Fouch mined the deposit between 1943 and 1945, when 2 large crystals of quartz were produced, from which were recovered a small amount of electronic grade quartz. George A. Ashley purchased the claim from Fouch in 1947.

In 1973, Pala International of Fallbrook developed a joint venture mining project involving the Sempe mine and began working the deposit. Some of the surface workings were expanded and new cuts made using a D-8 Caterpillar track-type dozer. Although moderately successful, mining operations had ceased by 1978.

In the early 1990's the Secretary of the Interior, through the delegation to the Bureau of Land Management (BLM), investigated the bona fides of the mining claim to determine any encumbrance of an allotment application (trust patent) filed by the Bureau of Indian Affairs on behalf of the Pala Tribe on June 19, 1980. The claim was adjudicated and in 1992 it was declared invalid from the beginning, or void ab initio. The land is now managed for the benefit of the Pala Band of Mission Indians by the Bureau of Indian Affairs (BIA).

Regions containing this locality

Pacific OceanOcean
Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

3 valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Christopher n. Wentzell
Beryl
Formula: Be3Al2(Si6O18)
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
Beryl var: Goshenite
Formula: Be3Al2(Si6O18)
Reference: Kunz, G. F. 1906. The Production of Precious Stones in 1905. Department of the Interior, U.S. Geological Survey, Division of Mining and Mineral Resources. GPO, Washington: pages 26-27; 40 pp.
Beryl var: Morganite
Formula: Be3Al2(Si6O18)
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
'Lepidolite'
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
Quartz
Formula: SiO2
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
Quartz var: Rock Crystal
Formula: SiO2
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Ref.: Weber, F. H. 1963. Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Beryl9.CJ.05Be3Al2(Si6O18)
var: Goshenite9.CJ.05Be3Al2(Si6O18)
var: Morganite9.CJ.05Be3Al2(Si6O18)
Unclassified Minerals, Rocks, etc.
'Lepidolite'-
'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
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Beryl
var: Goshenite
-Be3Al2(Si6O18)
var: Morganite-Be3Al2(Si6O18)
'Lepidolite'-
Quartz
var: Rock Crystal
-SiO2
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals for each chemical element

BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Morganite)Be3Al2(Si6O18)
Be Beryl (var: Goshenite)Be3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
OOxygen
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O BerylBe3Al2(Si6O18)
O Beryl (var: Morganite)Be3Al2(Si6O18)
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
O Beryl (var: Goshenite)Be3Al2(Si6O18)
O AlmandineFe32+Al2(SiO4)3
AlAluminium
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Morganite)Be3Al2(Si6O18)
Al Beryl (var: Goshenite)Be3Al2(Si6O18)
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si BerylBe3Al2(Si6O18)
Si Beryl (var: Morganite)Be3Al2(Si6O18)
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
Si Beryl (var: Goshenite)Be3Al2(Si6O18)
Si AlmandineFe32+Al2(SiO4)3
FeIron
Fe AlmandineFe32+Al2(SiO4)3

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 - Triassic
66 - 251.902 Ma



ID: 2776321
Mesozoic gabbroic rocks, unit 2 (undivided)

Age: Mesozoic (66 - 251.902 Ma)

Stratigraphic Name: Cuyamaca Gabbro; Elk Creek Gabbro; Gold Park Gabbro-Diorite; San Marcos Gabbro; Summit Gabbro

Description: Gabbro and dark dioritic rocks; chiefly Mesozoic

Comments: Mostly small exposures of gabbro and diorite scattered in western Klamath Mts., Sierra Nevada, Coast Ranges, Mojave Desert, and Peninsular Ranges 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:{diorite,gabbro}

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]

Cretaceous
66 - 145 Ma



ID: 2703103
Gabbro, undivided

Age: Cretaceous (66 - 145 Ma)

Description: Massive, coarse-grained, dark-gray and black biotite-hornblende-hypersthene gabbro.

Reference: Kennedy, M.P., and S.S. Tan. digital prep. by Bovard et al. Geologic Map of the Oceanside 30’ x 60’ Quadrangle, California. California Department of Conservation California Geological Survey. [131]

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]

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)
Kunz, G. F. (1905), Gems, jeweler's materials, and ornamental stones of California. California State Mining Bureau bulletin 37: p. 86.
Kunz, G. F. (1906), The Production of Precious Stones in 1905. Department of the Interior, U.S. Geological Survey, Division of Mining and Mineral Resources. GPO, Washington: pages 26-27; 40 pp.
Jahns, R. H. and Wright, L. A. (1951), Gem and Lithium-bearing pegmatites of the Pala District, San Diego County, California. California Division of Mines special report 7A: 72 p.
Weber, F. H. (1963), Geology and mineral resources of San Diego County, California. California Division of Mines and Geology, County Report 3: p. 111.
Todd, W. R. & Waiwood, R. M. (1996), Mineral Report: Validity Examination of the Katerina Lode; Bureau of Land Management, United States Department of the Interior, Oct. 30; 71 p., maps/plats, photos, legal/technical data.
Swoboda, E. R. (2001), Pala district 1946-48: Unpublished field notes and personal interviews. Swoboda Inc., Beverly Hills, Los Angeles County, CA; 5/2; 8 p.
Pala International, Inc. (2007), A brief synopsis on mining operations by Pala Properties International, of Fallbrook, CA; at www.palagems.com.

Localities in this Region
Show map


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.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: June 24, 2019 18:27:46 Page generated: June 10, 2019 22:21:23
Go to top of page