AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 47AC88

SAMPLE INFO : 47AC88
Sample ID:47AC88
Station ID:47AC88
Latitude:51.93569
Longitude:179.5848
Datum:NAD83
Date Sampled:1947-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Final Unit:Windy cone
 Text Description:
Specimen 47AC88 (130,550' E., 270,000' N.) is from one of the longer flows of Mount Cerberus that reached the coast. It is a medium-light-gray (N 6) porphyritic basaltic andesite; most of the visible phenocrysts are plagioclase, averaging An82, but there are also olivine, hypersthene, augite, and magnetite crystals. The olivine and augite are commoner and in larger crystals (0.5 mm in diameter), than the hypersthene. The groundmass consists of plagioclase microlites with augite and magnetite and a mesostasis of glass.

References:
Geologic reconnaissance of Semisopochnoi Island, western Aleutian Islands, Alaska
Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western 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
47AC8851.93569179.5848Unknown, Unknown1947-01-01 Mount YoungSemisopochnoi Island, from one of the longer flows of Mount Cerberus that reached the coast (130,550' E, 270,000' N)Specimen 47AC88 (130,550' E., 270,000' N.) is from one of the longer flows of Mount Cerberus that reached the coast. It is a medium-light-gray (N 6) porphyritic basaltic andesite; most of the visible phenocrysts are plagioclase, averaging An82, but there are also olivine, hypersthene, augite, and magnetite crystals. The olivine and augite are commoner and in larger crystals (0.5 mm in diameter), than the hypersthene. The groundmass consists of plagioclase microlites with augite and magnetite and a mesostasis of glass.47AC88LavaWindy coneWhole-rock 56.16 0.79 19.65 7.05 0.2 2.26 8.12 3.77 1.64 0.33 99.75368NN2.434.83H2OP=0.01; H2OM=0; CO2=0.02NN 35.2 487 5.9 units are percent 1.35745XRF: Rb, Sr, Ni; NN: K;
47AC8851.93569179.5848Unknown, Unknown1947-01-01 Mount YoungSemisopochnoi Island, from one of the longer flows of Mount Cerberus that reached the coast (130,550' E, 270,000' N)Specimen 47AC88 (130,550' E., 270,000' N.) is from one of the longer flows of Mount Cerberus that reached the coast. It is a medium-light-gray (N 6) porphyritic basaltic andesite; most of the visible phenocrysts are plagioclase, averaging An82, but there are also olivine, hypersthene, augite, and magnetite crystals. The olivine and augite are commoner and in larger crystals (0.5 mm in diameter), than the hypersthene. The groundmass consists of plagioclase microlites with augite and magnetite and a mesostasis of glass.47AC88LavaWindy coneWhole-rock H2OP=0.01; H2OM=0; CO2=0.02NN 0.75 663 14.2 35 4.93 22 5.22 1.44 4.23 0.7 4.4 0.96 2.78 0.39 2.7 25.9 131 3.8 3.41 11 2.65 1.29 172 8 16.6 50.6 61.3 1.1 201SS-ID: Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Nb, Hf, Pb, Th, U, Mo; XRF: Y, Zr, V, Cr, Co, Cu, Zn;
47AC8851.93569179.5848Unknown, Unknown1947-01-01 Mount YoungSemisopochnoi Island, from one of the longer flows of Mount Cerberus that reached the coast (130,550' E, 270,000' N)Specimen 47AC88 (130,550' E., 270,000' N.) is from one of the longer flows of Mount Cerberus that reached the coast. It is a medium-light-gray (N 6) porphyritic basaltic andesite; most of the visible phenocrysts are plagioclase, averaging An82, but there are also olivine, hypersthene, augite, and magnetite crystals. The olivine and augite are commoner and in larger crystals (0.5 mm in diameter), than the hypersthene. The groundmass consists of plagioclase microlites with augite and magnetite and a mesostasis of glass.47AC88LavaWindy coneWhole-rock H2OP=0.01; H2OM=0; CO2=0.02NN units are percent 0.1units are percent 0.06 units are percent 0.01units are percent 0.01 units are percent 0.003 0.02 0.002 units are percent 0.007 units are percent 0.002 368SPEC

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: 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.