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Oxide and Cation Compositions of Pyroxene Grains from Drill Core of the Duluth Complex, Minnesota


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Schulte, R.F., Seal, R.R., Piatak, N.M., and Woodruff, L.G., 2017, Oxide and cation compositions of pyroxene grains from drill core of the Duluth Complex, Minnesota: U.S. Geological Survey data release,


The table contains oxide and cation compositions of pyroxene grains from drill core in the Duluth Complex. The oxides were determined by electron probe microanalysis (EPMA) and are reported in weight percent (we%). The cations were calculated from the oxide concentrations and are reported in mole percent (mol%). Pyroxene minerals are a group of rock-forming inosilicate minerals with calcium (Ca), iron (Fe), and magnesium (Mg) endmembers. Wollastonite (Wo) is the Ca-endmember with the formula Ca2Si2O6. Ferrosilite (Fs) is the Fe-endmember with the formula Fe2Si2O6, and enstatite (En) is the Mg-endmember with the formula Mg2Si2O6. In order to better understand the chemical compositions of the pyroxenes, the percent of Wo, Fs, and En [...]


Point of Contact :
Nadine Piatak
Originator :
Ruth F. Schulte, Robert R. Seal, II, Nadine M. Piatak, Laurel G. Woodruff
Metadata Contact :
Peter N Schweitzer
Publisher :
U.S. Geological Survey
Distributor :
GS ScienceBase
USGS Mission Area :
Energy and Minerals
SDC Data Owner :
Mineral Resources Program

Attached Files

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Pyroxene Compositions.csv
“Pyroxene Compositions”
63.32 KB


Data were collected in order to determine the chemical composition of pyroxene grains found in drill cores from the Duluth Complex.

Additional Information


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DOI doi:10.5066/F73N21XC

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