AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 54-F-55

SAMPLE INFO : 54-F-55
Sample ID:54-F-55
Station ID:54-F-55
Latitude:53.874
Longitude:-166.916
Datum:NAD83
Date Sampled:1954-01-01
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Olivine-bearing andesite porphyry from the Makushin volcanics one-half mile south of the vent to Makushin Volcano. It is dark gray and vuggy and contains plagioclase and pyroxene phenocrysts 2-3 millimeters long. Phenocrysts compose 25 percent of the rock: 14 percent sodic labradorite, which forms euhedral to anhedral grains, fragments, and stubby crystals, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 5 percent euhedral crystals and fragments of augite(?); 2 percent subhedral to anhedral hypersthene with augite (?) reaction rims; 3 percent anhedral olivine; and 1 percent subhedral to anhedral magnetite. The groundmass has an intergranular to obscured texture and includes abundant laths and stubby crystals of calcic andesine, much glass and granular augite (?), and traces of hypersthene, olivine, and a granular black opaque mineral.

References:
Geology of Unalaska Island and adjacent insular shelf, Aleutian Islands, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2geologic unitMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-majorsREF majorsMETH majorsFe2O3/Fe203T origFeO/FeOT origVolatiles csvMETH volatilesCsRbBaSrLaCePrNdSmEuGdTbDyHoErTmYbLuYZrNbHfTaPbThUScVCrFeCoNiCuZnGaMoAsNaKRef trace1METH trace1RbBaSrLaCeNdSmEuGdDyErYbLuYZrNbPbThUScTiVCrNiCuZnGaRef trace2METH trace2Light csvHalogen csvother major csvother lile csvother ree csvother hfse csvother hpe csvother tm csvother misc csv
54-F-55 53.874 -166.916 Fraser, G. D. 1954-01-01 Makushin Makushin volcanics from 1 mi S of Makushin Volcano Olivine-bearing andesite porphyry from the Makushin volcanics one-half mile south of the vent to Makushin Volcano. It is dark gray and vuggy and contains plagioclase and pyroxene phenocrysts 2-3 millimeters long. Phenocrysts compose 25 percent of the rock: 14 percent sodic labradorite, which forms euhedral to anhedral grains, fragments, and stubby crystals, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 5 percent euhedral crystals and fragments of augite(?); 2 percent subhedral to anhedral hypersthene with augite (?) reaction rims; 3 percent anhedral olivine; and 1 percent subhedral to anhedral magnetite. The groundmass has an intergranular to obscured texture and includes abundant laths and stubby crystals of calcic andesine, much glass and granular augite (?), and traces of hypersthene, olivine, and a granular black opaque mineral. 54-F-55 Lava Whole Rock 56.88 0.98 16.78 0.17 3.72 7.64 3.72 1.41 0.26 100.8533XRF2.815.63LOI=0.57XRFB V=0.005, M=NN, R=315;S V=0.01, M=RAPIDA, R=315;Ba V=0.08, M=NN, R=315;Sr V=0.1, M=NN, R=315;K V=11705, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.01, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.004, M=NN, R=315;Cu V=0.007, M=NN, R=315;Ga V=0, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0, M=NN, R=315;Sc V=0.005, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=5875, M=CALC, R=533;
54-F-55 53.874 -166.916 Fraser, G. D. 1954-01-01 Makushin Makushin volcanics from 1 mi S of Makushin Volcano Olivine-bearing andesite porphyry from the Makushin volcanics one-half mile south of the vent to Makushin Volcano. It is dark gray and vuggy and contains plagioclase and pyroxene phenocrysts 2-3 millimeters long. Phenocrysts compose 25 percent of the rock: 14 percent sodic labradorite, which forms euhedral to anhedral grains, fragments, and stubby crystals, and which has normal and oscillatory zones, zones of dusty inclusions, and apatite inclusions; 5 percent euhedral crystals and fragments of augite(?); 2 percent subhedral to anhedral hypersthene with augite (?) reaction rims; 3 percent anhedral olivine; and 1 percent subhedral to anhedral magnetite. The groundmass has an intergranular to obscured texture and includes abundant laths and stubby crystals of calcic andesine, much glass and granular augite (?), and traces of hypersthene, olivine, and a granular black opaque mineral. 54-F-55 Lava Whole Rock 56.7 0.98 16.7 8.1 0.17 3.7 7.6 3.7 1.4 0.26Total not given in table. 100.14315RAPIDA2.85.6H2OM=0.04; H2OP=0.53; CO2=0.05RAPIDAB V=0.005, M=NN, R=315;S V=0.01, M=RAPIDA, R=315;Ba V=0.08, M=NN, R=315;Sr V=0.1, M=NN, R=315;K V=11705, M=CALC, R=533;Yb V=0, M=NN, R=315;Y V=0, M=NN, R=315;Zr V=0.01, M=NN, R=315;Pb V=0, M=NN, R=315;Co V=0.002, M=NN, R=315;Cr V=0.004, M=NN, R=315;Cu V=0.007, M=NN, R=315;Ga V=0, M=NN, R=315;Mo V=0, M=NN, R=315;Ni V=0, M=NN, R=315;Sc V=0.005, M=NN, R=315;V V=0.02, M=NN, R=315;Ti V=5875, M=CALC, R=533;

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/samples/sample_info.php
Page modified: December 2, 2016 10:12
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS