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Willard Mine, Willard District, Humboldt Range, Pershing Co., Nevada, USA

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Latitude & Longitude (WGS84): 40° 15' 28'' North , 118° 20' 40'' West
Latitude & Longitude (decimal): 40.25778,-118.34472
GeoHash:G#: 9r5v508n8
Locality type:Mine
Köppen climate type:BWk : Cold desert climate


Located in sec. 25 & 26, 35-36, T28N, R32E, MDM.


Mineral List


29 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

Middle Jurassic - Norian
163.5 - 228 Ma



ID: 2989993
Jungo Terrane - Turbiditic, fine-grained, terrigenous clastic rocks

Age: Mesozoic (163.5 - 228 Ma)

Stratigraphic Name: Grass Valley Formation; Happy Creek Volcanic Complex; Osobb Formation; Winnemucca Formation; Raspberry Formation

Description: The Jungo terrane, also called the Lovelock assemblage or Fencemaker allochthon (Oldow, Satterfield, and Silberling, 1993), consists of complexly deformed, thick basinal, turbiditic, fine-grained, terrigenous clastic rocks, mainly Norian, but also as young as Pliensbachian (Late Triassic and Early Jurassic) age. It crops out in southern Washoe, Churchill, Humboldt, and Pershing Counties. These rocks represent the basinal facies component of the Auld Lang Syne Group (Burke and Silberling, 1973; Lupe and Silberling, 1985). The Jungo terrane has no known basement and is structurally detached from coeval shelf facies (Silberling, Jones, and others, 1992). It is locally overlain unconformably by Middle or Upper Jurassic peritidal sedimentary rocks (Jcg) intruded by a gabbroic igneous assemblage (Silberling, 1991). Rocks included with the Jungo terrane were originally mapped as the Grass Valley Formation of the Auld Lang Syne Group in Humboldt and Pershing Counties; some rocks were mapped as the Happy Creek Volcanic “series” (now the Happy Creek Volcanic Complex) in Humboldt County, the Nightingale sequence in southern Washoe County, the Osobb Formation of the Auld Lang Syne Group in Churchill County, and the Winnemucca and Raspberry Formations of the Auld Lang Syne Group (Compton, 1960) in the Santa Rosa Range in Humboldt County.

Lithology: Major:{siliciclastic}

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]

Triassic
201.3 - 252.17 Ma



ID: 3184762
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 252.17 Ma)

Lithology: Sedimentary 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



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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Howard, D. and Thomssen, D. (2000) Occurrences of Native Selenium in Nevada. USA Micro Probe, newsletter of the NorthWest MicroMineral Study Group, Spring 2000, Volume IX(1): 15-17.
Jensen, M. and Leising, J. (2001) Wavellite, Fluellite & Minyulite from the Willard Mine, Pershing County, Nevada. Mineralogical Record 32(4): 297-303.
Mineralogical Record (2008) 39: 297.
Kampf, A.R., Adams, P.M., Barwood, H., and Nash, B.P. (2017) Fluorwavellite Al3(PO4)2(OH)2F.5H2O; the fluorine analogue of Wavellite. American Mineralogist: 102: 909-919.
Johnson, Maureen G. (1977) Geology and Mineral Resources of Pershing County, Nevada. Nevada Bureau of Mines and Geology Bulletin 89.
Castor, Stephen B. and Ferdock, Gregory C. (2003) Minerals of Nevada. Nevada Bureau of Mines and Geology Special Publication 31.

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