Alaska Volcano Observatory - Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, Alaska

MAP AND TABLES SHOWING GEOCHRONOLOGY AND WHOLE-ROCK GEOCHEMISTRY OF SELECTED SAMPLES, UGASHIK AND PART OF KARLUK QUADRANGLES, ALASKA

Wilson, F.H., and Shew, Nora, 1992, Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1539-E, 34 p., 2 sheets, scale 1:250,000.

link to PDFs of report and sheets

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.

191: Potassium-argon data

* Constants used were 40K/K=1.67x10^-4 mol/mol; ?ß=4.962x10^-1/year, ?e=0.581x10^-1/year. Potassium analysts for the K-Ar dating were P.R. Klock, D.V. Vivit, and Byron Lai. Sample preparation, argon extraction, and data reduction by authors with aid from C.L. Connor, L.B. Gray-Pickthorn, Rita Taylor, Brian Ho, G.D. DuBois, and Douglas Lamm; except for samples R-41360, analyzed by M.L. Silberman; samples Ugashik 1, Ugashik 2, and Great Basins No. 1, reported in Brockway and others (1975); and sample 66AR 1331, reported in Reed and Lanphere (1969) and Dalrymple and Lanphere (1974). *

192: Major-element chemical data and CIPW normative minerals

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* For most samples, major-element chemical analyses were performed using X-ray fluorescence methods; induction-coupled plasma spectrometry (ICP) was used for three samples. CIPW norms and other petrologic parameters were calculated using PETCAL (Bingler and others, 1976) with extensive modifications of the program by R.D. Koch and F.H. Wilson to calculate additional parameters and allow use on a microcomputer. Values shown are in percent, Norm-An is the normative plagioclase composition in percent anorthite calculated by PETCAL. Analysts for X-ray fluorescence analyses were J.S. Wahlberg, J.E. Taggert Jr., J.W. Baker, A.J. Bartel, K.C. Stewart, and L.F. Espos. Samples 81AWs 266, 81AYb 138, and 81AYb 168 were analyzed using ICP methods by Hezekiah Smith. FeO, CO2, and H2O were determined following Shapiro and Brannock (1962) by H.G. Neiman, Georgia Mason, Jean Ryder, Cynthia Stone, D.V. Vivit, P.R. Klock, D. Shepard, S.T. Neil, M. Taylor, E.E. Engleman, and M. Manser. *

193: Selected semiquantitative emission spectrometric data

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SAMPLES

81AWs 266
81AYb 168
79AMm 34
81ARj 11a
81ARj 11b
81ARj 13
81ARj 13b
81AWs 271
79ADt 135
79AYb 90
81ASh 2
81AWs 275
79AWs 17
81ARj 16
81ARj 18
81ARj 36
81ARj 37
81ARj 38a
81ARj 38b
81AWs 276
81AYb 167
78ADt 34
79AWs 6a

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