PRELIMINARY - U.S. Geological Survey Certificate of Analysis

Basalt, Columbia River, BCR-2

Material used in the preparation of BCR-2 was collected in 1996 from the Bridal Veil Flow Quarry under the direction of Stephen A. Wilson, U.S. Geological Survey. The quarry, located approximately 29 miles east of Portland, Oregon, is the same collection site used to provide material for BCR-1.

Element concentrations were determined in a round-robin study involving 20 international laboratories. Recommended total element concentrations are reported 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 provided when two or more independent laboratories using at least two independent analytical procedures have provided information. Information values without standard deviations represent information from a single laboratory or analytical procedure.

Recommended Values | Information Values | Certificate Information | Bibliography | Glossary | Order and Pricing Information


Element Wt % ± Oxide Wt % ±
Al 7.14 0.10 Al2O3 13.5 0.2
Ca 5.09 0.08 CaO 7.12 0.11
Fetot 9.66 0.15 Fe2O3 tot 13.8 0.2
K 1.49 0.04 K2O 1.79 0.05
Mg 2.16 0.03 MgO 3.59 0.05
Na 2.34 0.08 Na2O 3.16 0.11
P 0.15 0.01 P2O5 0.35 0.02
Si 25.3 0.4 SiO2 54.1 0.8
Ti 1.35 0.03 TiO2 2.26 0.05
Element µg/g ± Element µg/g ±
Ba 683 28 Rb 48 2
Ce 53 2 Sc 33 2
Co 37 3 Sr 346 14
Cr 18 2 Th 6.2 0.7
Eu 2.0 0.1 U 1.69 0.19
Ga 23 2 V 416 14
Gd 6.8 0.3 Y 37 2
La 25 1 Yb 3.5 0.2
Mn 1520 60 Zn 127 9
Mo 248 17 Zr 188 16
Nd 28 2

Return to top


Information Values

Element µg/g ± Element µg/g ±
Cs 1.1 0.1 Lu 0.51 0.02
Cu 19 2 Pb 11 2
F 440   Pr 6.8 0.3
Hf 4.8 0.2 Sm 6.7 0.3
Ho 1.33 0.06 Tb 1.07 0.04
Li 9 2 Tm 0.54  
Element Isotopic Ratios ± N
Pb 206/204 18.750 0.011 1
Pb 207/204 15.615 0.003 1
Pb 208/204 38.691 0.021 1

Return to top


Certificate Information

Issued 4-30-98
Denver, Colorado

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

Return to top


Bibliography

Wilson, S.A., 1997, The collection, preparation, and testing of USGS reference material BCR-2, Columbia River, Basalt: U.S. Geological Survey Open-File Report 98-xxx.

Return to top


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
N Number of labs reporting

Return to top


Order and Pricing Information

Placing an Order

USGS reference materials may be obtained directly from Dr. Stephen A. Wilson. The price for each reference material 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 reference materials 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 form: Order Form (Word) (22 KB) or Order Form (PDF) (238 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
Email: (swilson@usgs.gov)

Payment Options

Domestic customers: Payment options include purchase order, check, money order, or credit card (Visa, Mastercard, American Express).

International customers: Payment on foreign orders can only be made using the following:

  • Banker's draft against an international bank
  • International money order
  • Credit card (Visa, Mastercard, American Express)

Payments for domestic or international orders using a credit card receive a 10% discount on the per bottle price.

User Agreements

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 agreement form and follow the instructions on the form when placing your order.

Return to top | Back to Certificate List | Mineral Resources Program | Crustal Geophysics and Geochemistry Science Center