U.S. Geological Survey Certificate of Analysis

Granite, G-2

Material was collected from the Sullivan quarry near Near Bradford, Rhode Island, which is approximately three miles east of the site where G-1 was collected. The material was collected by Felix Chayes, Geophysical Laboratory, Carnegie Institution.

Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are based primarily on international data compilations (Gladney, et al. 1992, Govindaraju, K., 1989, Govindaraju, 1994). USGS reports (Flanagan, F.J., 1969, Flanagan, 1976) provide background information on this material.

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


Oxide Wt % ± Oxide Wt % ±
Al2O3 15.39 0.30 MgO 0.75 0.03
CaO 1.96 0.08 MnO 0.03 0.01
Fe2O3 1.07 0.14 Na2O 4.08 0.13
FeO 1.46 0.08 P2O5 0.14 0.01
Fe2O3T 2.66 0.17 SiO2 69.14 0.3
K2O 4.48 0.13 TiO2 0.48 0.03
Element µg/g ± Element µg/g ± Element µg/g ±
Ba 1880 23 Ga 23 2 Sm 7.2 0.7
Be 2.5 0.4 Hf 7.9 0.7 Sr 478 2
Ce 160 10 La 89 8 Th 25 2
Co 4.6 0.7 Li 34 4 V 36 4
Cs 1.34 0.16 Nd 55 6 Y 11 2
Dy 2.4 0.3 Pb 30 4 Yb 0.8 0.2
Eu 1.4 0.12 Rb 170 3 Zn 86 8
F 1280 80 Sc 3.5 0.4 Zr 309 35

Return to top


Information Values

Element µg/g Element µg/g Element µg/g
As 0.25 Gd 4.3 Se 0.07
B 2.4 Ho 0.4 Ta 0.5
Bi 0.04 Lu 0.11 Tb 0.48
Cl 70 Nb 12 Tm 0.18
Cu 11 Pr 18 W 0.2
Er 0.92 Stot 100

Return to top


Certificate Information

Denver, Colorado
revised March 1995

David B. Smith
Central Region Mineral Resources Team (formerly Branch of Geochemistry)

Return to top


Bibliography

Flanagan, F.J., 1969, U.S. Geological Survey silicate rock standards: Geochimica et Cosmochimica Acta, 31:289-308.

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

Gladney, E.S., Jones, E.A., Nickell, E.J., and Roelandts, I., 1992, 1988 Compilation of elemental concentration data for USGS AGV-1, GSP-1 and G-2: Geostandards Newsletter, 16:111-300.

Govindaraju, K., 1989, 1989 Compilation of working values and sample description of 272 geostandards: Geostandards Newsletter, 13:1-113.

Govindaraju, K., 1994, 1994 Compilation of working values and description for 383 geostandards: Geostandards Newsletter, 18:1-158.

Return to top


Notes

Unless otherwise indicated total element concentrations are reported for material on an as-received basis, i.e., no drying.

Drying instructions
Certificate values are based on analyses performed on an as-received basis, i.e., drying is not required.

Return to top


Order and Pricing Information

This geochemical reference standard is no longer available.

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