AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 93SJP4

SAMPLE INFO : 93SJP4
Sample ID:93SJP4
Station ID:93SJP4
Latitude:62.36351051
Longitude:-143.0646
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Basaltic Andesite
Text Description:
Dike trending S35E at Site 9. Fine-grained, vesicular, diktytaxitic, holocrystalline, intergranular, seriate porphyritic with a matrix of mesostasis, opaque, clinopyroxene and plagioclase. Plagioclase phenocrysts (An34-An59) are up to 2.25 and the larger phenocrysts have sieved textured zones, tooth-like overgrowth rims or resorbed rims, oscillatory zoning, and pyroxene inclusion, while smaller grains display normal zoning. Olivine phenocrysts are up to 1.2 mm and some are slightly altered, resorbed edges are common, and a few have opaque inclusions. Clinopyroxene phenocrysts are up to 0.95 mm and a few have orthopyroxene cores. Orthopyroxene is up to 0.3 mm and altered. Mode: 63.0% matrix, 24.4% plagioclase, 2.0% olivine, 1.8% clinopyroxene, 0.3% orthopyroxene, 0.4% alteration, 8.1% vesicles.

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
93SJP462.36351051-143.0646Preece, S. J.1993-00-00 Skookum CreekNabesna B-5, T7N, R13E, S30Dike trending S35E at Site 9. Fine-grained, vesicular, diktytaxitic, holocrystalline, intergranular, seriate porphyritic with a matrix of mesostasis, opaque, clinopyroxene and plagioclase. Plagioclase phenocrysts (An34-An59) are up to 2.25 and the larger phenocrysts have sieved textured zones, tooth-like overgrowth rims or resorbed rims, oscillatory zoning, and pyroxene inclusion, while smaller grains display normal zoning. Olivine phenocrysts are up to 1.2 mm and some are slightly altered, resorbed edges are common, and a few have opaque inclusions. Clinopyroxene phenocrysts are up to 0.95 mm and a few have orthopyroxene cores. Orthopyroxene is up to 0.3 mm and altered. Mode: 63.0% matrix, 24.4% plagioclase, 2.0% olivine, 1.8% clinopyroxene, 0.3% orthopyroxene, 0.4% alteration, 8.1% vesicles.93SJP4LavaWhole-rock 56.5 0.8 18.53 6.26 0.12 4.76 7.89 3.93 0.89 0.19 100.2355DCP6.926.26LOI=0.16DCP 15.2 308 526 14 76 2.8 < 0.5 1.3 19.5 157 95 74 53 62 17.1 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.