U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY
1998
OPEN-FILE REPORT 98-800
U.S. DEPARTMENT OF THE INTERIOR
BRUCE BABBITT, Secretary
U.S. GEOLOGICAL SURVEY
Charles G. Groat, Director
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
1U.S. Geological Survey, Anchorage, Alaska.
2U.S. Geological Survey, Denver, Colo.
1. ICP 40Forty major, minor, and trace elements were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES) after the sample was decomposed using a mixture of hydrochloric, nitric, perchloric, and hydrofluoric acids at low temperature.
Al (0.005-50%) |
As (10-50,000 ppm) |
Eu (2-5,000 ppm) |
Sc (2-50,000 ppm) |
Ca (0.005-50%) |
Au (8-50,000 ppm) |
Ga (4-50,000 ppm) |
Sn (5-50,000 ppm) |
Fe (0.02-25%) |
Ba (1-35,000 ppm) |
Ho (4-5,000 ppm) |
Sr (2-15,000 ppm) |
K (0.01-50%) |
Be (1-5,000 ppm) |
La (2-50,000 ppm) |
Ta (40-50,000 ppm) |
Mg (0.005-5%) |
Bi (10-50,000 ppm) |
Li (2-50,000 ppm) |
Th (6-50,000 ppm) |
Na (0.005-50%) |
Cd (2-25,000 ppm) |
Mo (2-50,000 ppm) |
U (100-100,000 ppm) |
P (0.005-50%) |
Ce (5-50,000 ppm) |
Nb (4-50,000 ppm) |
V (2-30,000 ppm) |
Ti (0.005-25%) |
Co (2-25,000 ppm) |
Nd (9-50,000 ppm) |
Y (2-25,000 ppm) |
Mn (4-50,000 ppm) |
Cr (2-50,000 ppm) |
Ni (3-50,000 ppm) |
Yb (1-5,000 ppm) |
Ag (2-10,000 ppm) |
Cu (2-15,000 ppm) |
Pb (4-50,000 ppm) |
Zn (2-15,000 ppm) |
2. ICP 10Ten elements were determined using ICP-AES following a hydrochloric acid-hydrogen peroxide digestion and aliquat 336-diisobutylketone extraction.
Ag (0.08-400 ppm) |
Cu (0.05-500 ppm) |
As (1.0-6,000 ppm) |
Mo (0.10-900 ppm) |
Au (0.10-1,500 ppm) |
Pb (1.0-6,000 ppm) |
Bi (1.0-6,000 ppm) |
Sb (1.0-6,000 ppm) |
Cd (0.05-500 ppm) |
Zn (0.05-500 ppm) |
3. GoldGold was determined by fire assay using a 15 gram sample. The lower reporting limit for Au using this technique is 5 ppb.
4. MercuryMercury was analyzed using continuous-flow cold vapor atomic absorption spectrometry. The lower reporting limit for Hg using this technique is 0.02 ppm.
5. TungstenTungsten was determined by instrumental neutron activation analysis. The lower limit of determination is 0.5ppm.
Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral deposits of Alaska: Economic Geology Monograph 9, p. 242-286.
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The URL of this page is http://pubs.usgs.gov/of/1998/of98-800/
Date created: 12/10/1998
Last modified: 04/22/2005