AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP80B

SAMPLE INFO : 94SJP80B
Sample ID:94SJP80B
Station ID:94SJP80B
Latitude:62.37740057
Longitude:-143.0987989
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Field Lithology:Andesite
Text Description:
Large plates in an outcrop above red scoria. Laterally to the west of 94SJP80A at Site 9. Fine-grained, holocrystalline, seriate to glomeroporphyritic with a matrix of cryptocrystalline material, opaque and plagioclase. Plagioclase phenocrysts (An39 - An64) are 2.6-0.1 mm and have sieve textured zones, complex zoning, and occasionally have resorption embayments or poikilitic pyroxene inclusions. Orthopyroxene phenocrysts are up to 0.7 mm and sometimes contain a clinopyroxene core. Clinopyroxene phenocrysts are up to 1 mm and frequently occurs as inclusions in orthopyroxene or plagioclase, twinning is common. Opaque phenocrysts are up to 0.2 mm. 76.6% matrix, 19.6% plagioclase, 1.2% clinopyroxene, 2.4% orthopyroxene, 0.2% opaque.

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
94SJP80B62.37740057-143.0987989Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R12E, S24Large plates in an outcrop above red scoria. Laterally to the west of 94SJP80A at Site 9. Fine-grained, holocrystalline, seriate to glomeroporphyritic with a matrix of cryptocrystalline material, opaque and plagioclase. Plagioclase phenocrysts (An39 - An64) are 2.6-0.1 mm and have sieve textured zones, complex zoning, and occasionally have resorption embayments or poikilitic pyroxene inclusions. Orthopyroxene phenocrysts are up to 0.7 mm and sometimes contain a clinopyroxene core. Clinopyroxene phenocrysts are up to 1 mm and frequently occurs as inclusions in orthopyroxene or plagioclase, twinning is common. Opaque phenocrysts are up to 0.2 mm. 76.6% matrix, 19.6% plagioclase, 1.2% clinopyroxene, 2.4% orthopyroxene, 0.2% opaque.94SJP80BLavaWhole-rock 58.36 1.18 17.62 6.84 0.13 3.39 6.71 4.41 1.29 0.21 100.4155DCP7.586.84LOI=-0.14DCP 23.8 486 514 13.8 32.2 15.9 3.4 1.3 3.7 3.6 2.1 2 0.3 23 141 5.2 1.4 2.5 21.3 181 13 11 39 75 18.6 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, 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.