>USGS Certificate of Analysis Basalt, Hawaiian Volcanic Observatory, BHVO-1 (Geochemical Reference Standards)

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

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	S_tot	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, 192 p.

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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