AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP75

SAMPLE INFO : 94SJP75
Sample ID:94SJP75
Station ID:94SJP75
Latitude:62.27349908
Longitude:-143.3182386
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
 Text Description:
Approximately 30’ thick flow at South Pass. Fine grained, hypocrystalline, trachytic, seriate porphyritic with a matrix of brown glass, opaque, plagioclase, alteration and pyroxene?. Plagioclase phenocrysts (An38 - An63) are up to 1.75 mm and occasionally have strong normal zoning. Olivine? phenocrysts are up to 0.6 mm and mostly altered. Opaque phenocrysts are up to 0.45 mm. Clinopyroxene phenocrysts are up to 0.22 mm. Trachyandesite.

References:
Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex

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
94SJP7562.27349908-143.3182386Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S26Approximately 30’ thick flow at South Pass. Fine grained, hypocrystalline, trachytic, seriate porphyritic with a matrix of brown glass, opaque, plagioclase, alteration and pyroxene?. Plagioclase phenocrysts (An38 - An63) are up to 1.75 mm and occasionally have strong normal zoning. Olivine? phenocrysts are up to 0.6 mm and mostly altered. Opaque phenocrysts are up to 0.45 mm. Clinopyroxene phenocrysts are up to 0.22 mm. Trachyandesite.94SJP75LavaWhole-rock 60.17 1.22 16.97 6.47 0.16 2.07 4.61 5.2 2.03 0.52 99.9955DCP7.146.47LOI=0.56DCP 29 601 429 43 335 14.6 5.8 1.9 13.7 66 1 3 10 90 20.3 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

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.