AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP101B

SAMPLE INFO : 94SJP101B
Sample ID:94SJP101B
Station ID:94SJP101B
Latitude:62.35628735
Longitude:-143.198241
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
Approximately 5’ thick dike? that trends N40°E at Site 13. It looks the same as 94SJP101C. Fine grained, holocrystalline, porphyritic with a matrix of mesostasis, opaque, plagioclase, clinopyroxene and alteration. Plagioclase phenocrysts (An41 - An62) are up to 5.12 mm and a few have oscillatory zoning. Orthopyroxene phenocrysts are up to 1.2 mm and some have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.75 mm. An altered phase, olivine?, up to 1.12 mm, is sometimes rimmed by small pyroxene grains.

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
94SJP101B62.35628735-143.198241Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R12E, S28Approximately 5’ thick dike? that trends N40°E at Site 13. It looks the same as 94SJP101C. Fine grained, holocrystalline, porphyritic with a matrix of mesostasis, opaque, plagioclase, clinopyroxene and alteration. Plagioclase phenocrysts (An41 - An62) are up to 5.12 mm and a few have oscillatory zoning. Orthopyroxene phenocrysts are up to 1.2 mm and some have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.75 mm. An altered phase, olivine?, up to 1.12 mm, is sometimes rimmed by small pyroxene grains.94SJP101BLavaWhole-rock 57.04 1.23 17.37 6.69 0.13 3.88 7.71 3.7 1.39 0.26 100.6955DCP7.446.69LOI=0.58DCP 21.9 413 475 24 169 4.5 3.2 2.6 21.8 189 67 35 64 70 18.1 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 G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.