U.S. Geological Survey Certificate of Analysis

Dunite, DTS-1

DTS-1 is a reference material which can be used to establish analytical accuracy in the analysis of ultramafic rocks composed primarily of the mineral olivine. Material for the standard was collected from the Twin Sisters area of Washington state (Flanagan, 1967, 1972).

Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are based primarily on international data compilations (Abbey, 1983, Gladney, et al., 1987, Govindaraju, 1994). USGS reports (Flanagan, 1967, 1972) provide background information on this material.

Recommended Values | Certificate Information | Bibliography | Glossary | Notes


Oxide Wt % ± Oxide Wt % ±
SiO2 40.41 0.47 MnO 0.12 0.01
Fe2O3 1.03 0.36 MgO 49.59 0.33
FeO 6.97 0.26 CaO 0.17 0.03
Fe2O3T 8.68 0.24
Element µg/g ± Element µg/g ±
Ctot 220 80 Ni 2360 170
Ce 0.07 0.02 Sc 3.5 0.3
Co 140 15 Th 0.01 0.001
Cr 3990 300 U 0.0036 0.0004
Li 2.1 0.12
Oxide Wt % Oxide Wt %
Al2O3 0.19 Na2O 0.01
K2O 0.001 P2O5 0.002
TiO2 0.005
Element µg/g Element µg/g
As 0.034 Stot 12
Ba 1.7 Sb 0.5
Cd 0.01 Sn 0.55
Cl 11 Sr 0.32
Cu 7.1 V 11
F 13 Zn 46
Pb 12

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Certificate Information

Denver, Colorado
revised March 1995

David B. Smith
Central Region Mineral Resources Team (formerly Branch of Geochemistry)

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Bibliography

Abbey, S., 1983, Studies in "Standard Samples" of Silicate Rocks and Minerals 1969-1982: Canadian Geological Survey paper 83-15, p. 114.

Flanagan, F.J., 1967, U.S. Geological Survey silicate rock standards: Geochimica et Cosmoshimica Acta, 31:289-308.

Flanagan, F.J., 1972 values for international geochemical reference samples: Geochimica et Cosmochimica Acta, 37:1189-1200.

Gladney, E.S., Jones, E.A., Nickell, E.J. and Roelandts, I., 1991, 1988 Compilation of elemental concentration data for USGS DTS-1, G-1, PCC-1, and W-1: Geostandards Newsletter, 15:199-396.

Govindaraju, K., 1994, 1994 Compilation of Working Values and Descriptions for 383 Geostandards: Geostandards Newsletter, 18:1-158.

Ragland, P.C., Rogers, J.J.W., and Justus, P.S., 1068, Origin and diffferentiation of Triassic dolerite magmas, North Carolina, USA: Contributions to Mineralogy and Petrology, vol. 20, no. 1, pp. 57-80.

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Glossary

Symbol Definition
Fe2O3T Total iron expressed as Fe2O3
Ctot Total carbon concentration
Stot Total sulfur concentration
Wt % Percent of total element concentration
µg/g Total element concentration expressed as micrograms of element per gram of solid sample
± One standard deviation

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Notes

Unless otherwise indicated, total element concentrations are reported for material on an as-received basis.

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Order and Pricing Information

This geochemical reference standard is no longer available.

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