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:-166.91598
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 2Final 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-5553.874-166.91598Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 1 mi S of Makushin VolcanoOlivine-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-55LavaWhole-rock 56.88 0.98 16.78 0.17 3.72 7.64 3.72 1.41 0.26 100.8533XRF2.815.63LOI=0.57XRF 11705533CALC
54-F-5553.874-166.91598Fraser, G. D.1954-01-01 MakushinMakushin volcanics from 1 mi S of Makushin VolcanoOlivine-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-55LavaWhole-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=0.05RAPIDA units are percent 0.08units are percent 0.1 units are percent 0 units are percent 0units are percent 0.01 units are percent 0 units are percent 0.005 0.02units are percent 0.004 0.002units are percent 0units are percent 0.007 units are percent 0units are percent 0 315NN

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

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

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.