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THE IGNEOUS PETROLOGY AND GEOCHEMISTRY OF NORTHERN AKUTAN ISLAND, ALASKA
Romick, J. D., 1982, The igneous petrology and geochemistry of northern Akutan Island, Alaska: University of Alaska Fairbanks unpublished M.S. thesis, 151 p.

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.
122: Volcanic activity on Akutan Island since 1790

123: Modal analyses based on four 500 point counts of each sample.
* Values are in volume percent. Plag = plagioclase, Olv = olivine, Cpx = clinopyroxene, Opq = opaques, and GM = groundmass. *
124: Results from Clinopyroxene compositional estimates based on d-spacing of 311 reflection.

125: Modal analyses for western Akutan lavas
* (D) = dike, (U) = upper series, (L) = lower series, Plag = plagioclase, Olv = olivine, Cpx = clinopyroxene, Opx = orthopyroxene, Opq = opaques, and GM = groundmass. *
126: Modal analyses for eastern and central Akutan lavas
* H.S.V. = Hot Springs Bay Valley, Op.Bt. = Open Bight, P.V. = Pickup Valley, I = intrusive, F = lava flow, D = dike, Plag = plagioclase, Olv = olivine, Cpx = clinopyroxene, Opx = orthopyroxene, Opq = opaques, Alt = alteration minerals, and GM = groundmass *
127: Crystallization sequence for western Akutan lavas

128: Crystallization sequence for eastern and central Akutan lavas

129: Posterior probabilities for the four groups of lavas distinguished by the cluster analysis

130: Neodymium and strontium data for Akutan Island
* Data from McCulloch and Perfit (1981) and Perfit (unpublished data). Errors are in the last figures given and represent +/- 2 sigma mean. *
131: Whole rock K-Ar dates for Akutan lavas

132: Geothermometry for Akutan mineral pairs
* *Wood and Banno (1973) geothermometer. **Wells (1977) geothermometer. # at 1 bar pressure *
133: Normative oxides and normative minerals (in weight percent)
View table data :: Download table data (.csv)

134: Microprobe data for Akutan lavas

135: Rb and Sr analyses
View table data :: Download table data (.csv)
* Samples AK-81-8A and 8B, and AK-81-52A and 52B were duplicates submitted to test the reproducibility of the analyses *
136: Petrographic descriptions of Akutan lavas


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