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U.S. Geological Survey
Certificate of Analysis

Basalt, Hawaiian Volcanic Observatory, BHVO-1

Material for BHVO-1 was collected from the surface layer of the pahoehoe lava that overflowed from Halemaumau in the fall of 1919. Details of the collection, preparation, and testing are available (Flanagan, F.J., 1976).

Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are based primarily on international data compilations (Abbey, 1982, Flanagan, 1976, Govindaraju, 1994).

Recommended Values | Information Values | Certificate Information | Bibliography | Glossary | Notes

Recommended Values

Oxide Wt % ± Oxide Wt % ±
Al2O3 13.80 0.21 MgO 7.23 0.22
CaO 11.40 0.17 MnO 0.17 0.01
Fe2O3 2.82 0.24 Na2O 2.26 0.07
FeO 8.58 0.09 P2O5 0.273 0.025
Fe2O3T 12.23 0.2 SiO2 49.94 0.54
K2O 0.52 0.04 TiO2 2.71 0.06
Element µg/g ± Element µg/g ± Element µg/g ±
Ba 139 14 Ga 21 2 Sm 6.2 0.3
B 2.5 0.6 Hf 4.4 0.2 Sr 403 25
Ce 39 4 La 16 1 Th 1.1  
Co 45 2 Li 4.6 1.5 V 317 12
Cs 0.13 0.06 Nd 25 2 Y 28 2
Dy 5.2 0.3 Pb 2.6 0.2 Yb 2.0 0.2
Eu 2.06 0.08 Rb 11 2 Zn 105 5
F 385 31 Sc 31.8 1.3 Zr 179 21

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Information Values

Element µg/g Element µg/g Element µg/g
As 0.4 Gd 6.4 Se 0.07
B 1.1 Ho 0.99 Ta 1.2
Bi 0.02 Lu 0.29 Tb 0.96
Cl 92 Nb 19 Tm 0.33
Cu 136 Pr 18 W 0.27
Er 2.42 Stot 102

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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., 1976, Descriptions and Analysis of Eight New USGS Rock Standards, U.S. Geological Survey Professional Paper 840, p. 192.

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

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Glossary

Symbol Definition
Fe2O3T Total iron expressed as Fe2O3
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, i.e., no drying.

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Order and Pricing Information

This geochemical reference material is no longer available.

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