AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP74B

SAMPLE INFO : 94SJP74B
Sample ID:94SJP74B
Station ID:94SJP74B
Latitude:62.27183221
Longitude:-143.3193496
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Basaltic Andesite
Text Description:
At least 5' thick flow that is cut by a dike (94SJP74A) the second flow in the South Pass section. Fine grained, vesicular, hypocrystalline, trachytic, seriate porphyritic with a matrix of pale brown glass, opaque, plagioclase, orthopyroxene and clinopyroxene. Plagioclase phenocrysts (An38-An58) are up to 2.62 mm and occasionally have minor sieve textured zones or normal zoning. Orthopyroxene phenocrysts are up to 1.75 mm and occasionally have thin clinopyroxene rims. Olivine phenocrysts are up to 0.1 mm and grains can be altered with a rim of small orthopyroxene crystals. Clinopyroxene phenocrysts are up to 0.1 mm.

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
94SJP74B62.27183221-143.3193496Preece, S. J.1994-00-00 Skookum CreekNabesna B-5, T6N, R11E, S26At least 5' thick flow that is cut by a dike (94SJP74A) the second flow in the South Pass section. Fine grained, vesicular, hypocrystalline, trachytic, seriate porphyritic with a matrix of pale brown glass, opaque, plagioclase, orthopyroxene and clinopyroxene. Plagioclase phenocrysts (An38-An58) are up to 2.62 mm and occasionally have minor sieve textured zones or normal zoning. Orthopyroxene phenocrysts are up to 1.75 mm and occasionally have thin clinopyroxene rims. Olivine phenocrysts are up to 0.1 mm and grains can be altered with a rim of small orthopyroxene crystals. Clinopyroxene phenocrysts are up to 0.1 mm.94SJP74BLavaWhole-rock 55.59 1.34 17.97 7.5 0.13 4.34 7.31 4.16 1.12 0.36 100.1855DCP8.37.5LOI=0.13DCP 16.4 358 590 28 230 7.3 3.3 0.9 19.3 168 39 45 56 79 18.9 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: 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.