Mindat Logo

Estelle Mine (Troeger's tunnel), Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
This page is currently not sponsored. Click here to sponsor this page.

Latitude: 36°31'19"N
Longitude: 117°48'52"W
A former Pb-Ag-Au-Zn mine located in sec. 23, T16S, R38E, MDM, 2.5 km (1.5 miles) SW of Cerro Gordo. MRDS database stated accuracy for this location is 100 meters.

Mineralization is a vein deposit hosted in Late Devonian limestone. The ore is in structurally controlled fractures. There are 2 veins. The San Felipe vein strikes N35W and dips 70SW. The Santa Maria vein strikes N-S and dips 60E. Recent mapping indicates that the San Felipe vein was not reached, a parallel vein was. Local rocks include Mesozoic volcanic rocks, unit 3 (Mojave Desert, Death Valley area, and Eastern Sierra Nevada).

Workings include underground openings with a length of 5,494.63 meters. The Dellaphine tunnel was driven N70E for 8,070 feet at 6,290 feet of elevation.
Drifting on the main tunnel totals 4,783 feet. The main raise is 800 feet. Total workings from the 140, 340 & 660 levels from the main raise is 9,957 feet.

Production data are found in: Tucker, W. Burling & Reid J. Sampson (1938).

Production statistics: Year: 1926: ore: ^0.16 ounces Au; 20.8 ounces Ag; 21.61% (weight per cent) Pb. Total value was $80,146 (period values).

Mineral List

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

8 entries listed. 7 valid minerals.

Localities in this Region


The above list 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.


Waring, Clarence A. (1915), Inyo County; 15th Report of the State Mineralogist, California Mining Bureau (Report 15): 15: 104.

Tucker, W. Burling & Reid J. Sampson (1938), Mineral resources of Inyo County, California: California Journal of Mines and Geology; California Division of Mines (Report 34): 34(4): 437-440.

Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology (Report 47): 47(1): 69-70.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10076624 & 10285243.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270138.

Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: December 17, 2014 23:19:23 Page generated: April 16, 2014 15:30:39
Mineral and Locality Search
and/or Locality:
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds