USGS Certificate of Analysis Basalt, Hawaiian Volcanic Observatory, BHVO-2 (Geochemical Reference Standards)

Material used in the preparation of BHVO-2 was taken from the surface layer of the pahoehoe lava that overflowed from the Halemaumau crater in the fall of 1919. This is the same location used to provide material for BHVO-1. Collection of BHVO-2 was accomplished in 1995 under the direction of Carl Thornberg, USGS. Details of the collection, preparation, and testing are available (Wilson, S.A., 1998).

Element concentrations were determined in a round robin study involving 20 international laboratories. Recommended values are listed when analytical results provided by three independent laboratories using a minimum of three independent analytical procedures are in statistical agreement. Information values with standard deviations are listed when at least two independent laboratories using two independent analytical procedures have provided information. Information values without standard deviations represent information from a single laboratory or analytical procedure.

Recommended Values

Element	Wt %	±	Oxide	Wt %	±
Al	7.16	0.08	Al₂O₃	13.5	0.2
Ca	8.17	0.12	CaO	11.4	0.2
Fe_tot	8.63	0.14	Fe₂O₃_tot	12.3	0.2
K	0.43	0.01	K₂O	0.52	0.01
Mg	4.36	0.07	MgO	7.23	0.12
Na	1.64	0.06	Na₂O	2.22	0.08
P	0.12	0.01	P₂O₅	0.27	0.02
Si	23.3	0.3	SiO₂	49.9	0.6
Ti	1.63	0.2	TiO₂	2.73	0.04

Element	µg/g	±	Element	µg/g	±
Ba	130	13	Nd	25.0	1.8
Ce	38	2	Ni	119	7
Co	45	3	Rb	9.8	1.0
Cr	280	19	Sc	32	1
Cu	127	7	Sr	389	23
Ga	21.7	0.9	V	317	11
Hf	4.1	0.3	Y	26	2
La	15	1	Zn	103	6
Mn	1290	40	Zr	172	11

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Information Values

Element	µg/g	±	Element	µg/g	±
F	370		Sm	6.2	0.4
Gd	6.3	0.2	Sn	1.9
Ho	1.04	0.04	Ta	1.4
Li	5		Tb	0.9
Lu	0.28	0.01	Th	1.2	0.3
Nb	18	2	Yb	2.0	0.2

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Certificate Information

Issued 4-30-98
Denver, Colorado

Dr. Geoff Plumlee
U.S. Geological Survey
Central Region Mineral Resources Team

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Bibliography

Wilson, S.A., 1997, Data compilation for USGS reference material BHVO-2, Hawaiian Basalt: U.S. Geological Survey Open-File Report xxxxx.

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Glossary

Symbol	Definition
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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Order and Pricing Information

Placing an Order

USGS reference materials (RMs) may be obtained directly from Dr. Stephen A. Wilson. The price for each RM is listed in U.S. dollars and are subject to change. For domestic orders, this cost includes all shipping and handling charges using normal mail delivery by the U.S. Postal Service. For foreign orders, delivery charges will be added to the final bill. Urgent requests for RMs should be initiated by Fax or e-mail. If required, expedited delivery is available with any additional shipping charges added to the final bill.

To order a USGS Reference Material, please contact Dr. Stephen Wilson or use the downloadable order form: Word format (48 KB) or PDF format (28 KB).

Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964D
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
e-mail: (swilson@usgs.gov)

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Beginning in 2006, users of USGS geochemical reference materials must complete a user agreement form prior to the order being processed. This agreement is required by the USGS Technology Transfer Office for complying with the United States Economy Act, 31 USC 1535A.

Please download the appropriate version of the agreement and follow the instructions on the form when placing your order.

User agreement for domestic users: Word format, 48 KB and PDF format, 124 KB.
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