AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 93SJP58

SAMPLE INFO : 93SJP58
Sample ID:93SJP58
Station ID:93SJP58
Latitude:62.41129172
Longitude:-143.1632447
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Platy flow within the spatter ridge at Site 4. Fine-grained, hypocrystalline, intersertal, porphyritic with a matrix of mesostasis, opaque, plagioclase and alteration. Plagioclase phenocrysts (An34 - An58) have two populations: most are 0.25-0.05 mm, euhedral to subhedral; less abundant are 0.65 - 0.35 mm, subhedral to anhedral grains, a few are sieve textured. Olivine phenocryst are up to 2.8 mm and a few have skeletal habits or opaque inclusions; at least one grain has grown around a rounded pyroxene core. One clinopyroxene phenocryst, 0.35 mm, was observed. Opaque 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
93SJP5862.41129172-143.1632447Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T7N, R12E, S3Platy flow within the spatter ridge at Site 4. Fine-grained, hypocrystalline, intersertal, porphyritic with a matrix of mesostasis, opaque, plagioclase and alteration. Plagioclase phenocrysts (An34 - An58) have two populations: most are 0.25-0.05 mm, euhedral to subhedral; less abundant are 0.65 - 0.35 mm, subhedral to anhedral grains, a few are sieve textured. Olivine phenocryst are up to 2.8 mm and a few have skeletal habits or opaque inclusions; at least one grain has grown around a rounded pyroxene core. One clinopyroxene phenocryst, 0.35 mm, was observed. Opaque phenocrysts are up to 0.1 mm.93SJP58LavaWhole-rock 57.5 0.8 16.47 6.4 0.12 6.76 7.14 3.5 1.22 0.22 99.9855DCP7.16.4LOI=-0.21DCP 20.5 497 667 17 107 4.4 4.2 0.5 21 187 231 160 63 69 17.2 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.