U.S. Geological Survey Geochemical Reference Materials and Certificates
PRELIMINARY
U.S. Geological Survey
Certificate of Analysis
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 | ||||
| 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 |
Issued 4-30-98
Denver, Colorado
Dr. Geoff Plumlee
U.S. Geological Survey
Central Region Mineral Resources Team
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.
| 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 |
USGS reference materials (RMs) may be obtained directly from Dr. Stephen A. Wilson. The price for each bottle of RM is $80.00 (U.S. dollars) except DGPM-1, which is $175.00 (U.S. dollars). For domestic orders, this cost includes all shipping and handling charges using normal mail delivery. 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, overnight delivery is available with these charges added to the final bill.
Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
e-mail: (wilson)
Domestic customers: Payment options include purchase order, check, money order, or credit card (Visa, Mastercard).
International customers: Payment on foreign orders can only be made using the following:
Payments for domestic or international orders using a credit card receive a 10% discount on the per bottle price.
Beginning in 2006, users of USGS geochemical reference standards must complete a user agreement form prior to the order being purchased.
User agreement for domestic users: Word format, 56 KB and PDF format, 24 KB.
User agreement for foreign users: Word format, 56 KB and PDF format, 28 KB.
Back to Certificate List | Mineral Resources Program | Central Region Mineral Resources Team
| Mineral Resources | Eastern / Central / Western / Alaska / Minerals Information |
| Crustal Imaging & Characterization / Spatial Data |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://minerals.cr.usgs.gov/geo_chem_stand/basaltbcr2.html
Page Contact Information: CMRT Webmaster
Page Last Modified: 07-May-2008@15:37
