AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 81ARj 16

SAMPLE INFO : 81ARj 16
Sample ID:81ARj 16
Station ID:81ARj 16
Latitude:57.175936113444
Longitude:-156.76039573371
Datum:NAD83
Date Sampled:1981-01-01
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
Text Description:
Porphyritic plagioclase-orthopyroxene-clinopyroxene dacite (S; high-silica andesite G) flow. Weakly foliated phenocrysts of plagioclase (An 58) in a glassy groundmass. Grain boundaries and fractures in some clinopyroxene are altered to opaque minerals. Larger phenocrysts are fractured and shattered. Rare lithic (?) fragments. Rounded quartz phenocrysts in reaction relation with groundmass.

References:
Map and tables showing geochronology and whole-rock geochemistry of selected samples, Ugashik and part of Karluk quadrangles, 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
81ARj 1657.175936113444-156.76039573371Riehle, J. R.1981-01-01 KialagvikUgashik A-3, Mount KialagvikPorphyritic plagioclase-orthopyroxene-clinopyroxene dacite (S; high-silica andesite G) flow. Weakly foliated phenocrysts of plagioclase (An 58) in a glassy groundmass. Grain boundaries and fractures in some clinopyroxene are altered to opaque minerals. Larger phenocrysts are fractured and shattered. Rare lithic (?) fragments. Rounded quartz phenocrysts in reaction relation with groundmass.81ARj 16LavaWhole-rock 61.2 0.78 17.4 6.24 0.11 2.68 6.53 3.03 1.78 0.17 98.434092XRF3.43.02

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.