AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 53-F-39

SAMPLE INFO : 53-F-39
Sample ID:53-F-39
Station ID:53-F-39
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:1953-01-01
Sample Type 1:Lava
Field Lithology:Andesite
 Text Description:
Albitized andesite(?) porphyry from the Unalaska formation, 1 1/2 miles south of Hive Bay and about halfway between Staraya Bay and Udagak Strait. It is medium-light gray to medium gray and has chalky plagioclase phenocrysts 1 to 5 millimeters long. Phenocrysts compose 5 percent of the rock: 4 percent albite, which forms euhedral to subhedral laths and stubby crystals having apatite inclusions; and 1 percent euhedral to anhedral magnetite. The groundmass is mottled and indistinct. Alteration is intense: albite and kaolin are pervasive; calcite is common and forms irregular patches near albite clusters; uralite(?) is present; and quartz is rare and forms scattered grains on crudely aligned pods.

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
53-F-3953.88707-166.93202Fraser, G. D.1953-01-01 MakushinUnalaska formation from 1 1/2 mi S of Hive BayAlbitized andesite(?) porphyry from the Unalaska formation, 1 1/2 miles south of Hive Bay and about halfway between Staraya Bay and Udagak Strait. It is medium-light gray to medium gray and has chalky plagioclase phenocrysts 1 to 5 millimeters long. Phenocrysts compose 5 percent of the rock: 4 percent albite, which forms euhedral to subhedral laths and stubby crystals having apatite inclusions; and 1 percent euhedral to anhedral magnetite. The groundmass is mottled and indistinct. Alteration is intense: albite and kaolin are pervasive; calcite is common and forms irregular patches near albite clusters; uralite(?) is present; and quartz is rare and forms scattered grains on crudely aligned pods.53-F-39LavaWhole-rock 63.3 0.74 16.7 4.6 0.1 1.2 1.8 7.4 1.9 0.33Total not given in table. 100.4315RAPIDA2.52.4H2OM=0.05; H2OP=1.1; CO2=0.78RAPIDA units are percent 0.03units are percent 0.01 units are percent 0 units are percent 0units are percent 0.02 units are percent 0 units are percent 0.001 0.009units are percent 0 0units are percent 0units are percent 0.0007 units are percent 0.002units 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 G22AC00137

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