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Sterling mine, Antwerp, Jefferson Co., New York, USA

Latitude: 44°14'18"N
Longitude: 75°35'28"W

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First identified occurrence of millerite in the US.

An iron mine located North of Antwerp. Reopened 1904 and closed 1910. Ore is soft, earthy hematite hosted in Precambrian quartz-chlorite schist. Produced an estimated 750,000 tons plus of ore. Workings feature an open pit (500 feet by 200 feet by 115 feet deep) plus underground workings to 200 feet deep.

Many historical identifications of minerals (ankerite, ilmenite, stilpnomelane) have been shown to be incorrect. The early mineral, "chalcodite" appears to be the ferric-dominant member of the stilpnomelane group, but needs to be re-investigated. Robinson and Chamberlain (1984) showed that stilpnomelane group minerals from this location were ferric iron-rich. Three partial analyses of material of varying colors contained dominant ferric iron: green (FeO = 9.94 wt %, Fe2O3 = 25.26), green-brown (FeO = 8.46, Fe2O3 = 31.37), and golden brown (Fe) = 2.18, Fe2O3 = 35.34). "Ferristilpnomelane" was named by Winchell and Winchell (1951) for the slightly ferrian variety of the series and probably does not occur at this location. Ferrous-dominant stilpnomelane is not found at this location, either.

Mineral List

23 entries listed. 16 valid minerals. 2 erroneous literature entries.

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References

- Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 397, 1062.

- New York State Museum Bull. 223,224, Newland, David H. (July-August 1919), The Mineral Resources of the State of New York: 126, 129.

- Palache, C., Berman, H. & Frondel, C. (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 240.

- Robinson, G.W. and Chamberlain, S.C. (1984). "Famous mineral localities: the Sterling Mine, Antwerp, New York." Mineralogical Record: 15(4): 199-216.

- Rocks & Minerals: 59: 223-224.

- Mineralogical Record: 21: 33.

- Chamberlain, Steven C. (1995) Historic Mineral Feature: The First Millerite Locality in the United State: Historical Notes on the Sterling Mine, Antwerp, Jefferson County, New York. Matrix 4:82-90.

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the 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 hundreds 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.
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