Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
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
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Mockingbird Mine (Talc & Lacy claim), Colorado area, Whitlock District, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA

This page is currently not sponsored. Click here to sponsor this page.
 
Latitude & Longitude (WGS84): 37° 33' 33'' North , 119° 58' 48'' West
Latitude & Longitude (decimal): 37.55917,-119.98000
Köppen climate type:Csb : Warm-summer Mediterranean climate


A former lode Au mine located in sec. 27, T4S, R18E, MDM, 1.0 km (3,100 feet) W of the Colorado School, along a small tributary of Saxon Creek, on private land. Named the Talc & Lacy claim (pre-1900). Discovered < 1890. Produced 1890's to 1920. Patented claim(s) amounted to 20 acres. Operator David W. And Maxie S. Dukes. MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is a vein deposit hosted in slate and greenstone. The ore body strikes N40-45W and dips 90. Gold occurs at the border of a nearly vertical, chloritic, altered greenstone dike where gently-dipping quartz stringers cutting the dike cut the slate wall rocks. Altered dike averages 3 feet thick. The quartz stringers are a fraction of an inch to several inches thick. The deposit produced specimens of wiry & arborescent gold. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) and/or Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).

Workings include surface and underground openings with an overall depth of 30.48 meters comprised of 1 shaft with drifts and a tunnel several hundred feet long.

Production data are found in: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957).

No other production record found.

Mineral List


7 valid minerals.

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

Late Jurassic - Triassic
145 - 252.17 Ma



ID: 2741850
Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains)

Age: Mesozoic (145 - 252.17 Ma)

Stratigraphic Name: Agua Fria Formation; Colfax Formation; Cosumnes Formation; Galice Formation; Hunter Valley Cherts; Mariposa Formation; Merced Falls Slate; Salt Spring Slate; Jasper Point Formation

Description: Shale, sandstone, minor conglomerate, chert, slate, limestone; minor pyroclastic rocks

Comments: Western Klamath Mountains, western Sierra Nevada. Primarily slate and metamorphosed graywacke; minor siltstone, conglomerate, chert, and volcanic rocks. Mainly Late Jurassic in age, but also includes some Early Jurassic or older rocks

Lithology: Major:{slate,graywacke}, Minor:{siltstone,conglomerate}, Incidental:{chert, volcanic, basalt}

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



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.

References

Castello, W.O. (1921), Mariposa County: California Mining Bureau. Report 17: 126.

Laizure, Clyde McK (1928), Mariposa, Madera Counties: California Journal of Mines and Geology, California Mining Bureau (Report 24): 24: 101.

Bowen, O.E., Jr. & C.H. Gray, Jr. (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 133, 286.

Bowen, W.E. and Evans (1966).

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 24 (map 2-13).

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10114883 & 10031128.

Mineralogical Record (2007): 38: 212.

Cook, R. & T. Gressman (2008) The Mockingbird Gold Mine, Mariposa County, California. Rocks & Minerals 83(5): 392-401.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060430462.

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 17, 2018 18:11:46 Page generated: October 17, 2017 19:41:08
Go to top of page