AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP96

SAMPLE INFO : 94SJP96
Sample ID:94SJP96
Station ID:94SJP96
Latitude:62.32822029
Longitude:-143.436301
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Rhyolite
 Text Description:
Feeder dike trending N50°E to N60°E on the west side of Goat Creek. The dike has cross-wise polygonal jointing and is similar in lithology to a flow higher up. Fine grained, hypocrystalline, pilotaxitic, porphyritic with a matrix of pale brown glass, cryptocrystalline material, opaque, feldspar and apatite?. Plagioclase phenocrysts are up to 2.5 mm and often display strong normal zoning and are rounded. Clinopyroxene phenocrysts are up to 0.55 mm. Orthopyroxene phenocrysts are up to 1.0 mm and some have resorption embayments or opaque inclusions. Opaque phenocrysts are up to 0.2 mm. 95.5% matrix, 3.4% plagioclase, 0.6% orthopyroxene, 0.2% clinopyroxene, 0.3% 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
94SJP9662.32822029-143.436301Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T6N, R11E, S6Feeder dike trending N50°E to N60°E on the west side of Goat Creek. The dike has cross-wise polygonal jointing and is similar in lithology to a flow higher up. Fine grained, hypocrystalline, pilotaxitic, porphyritic with a matrix of pale brown glass, cryptocrystalline material, opaque, feldspar and apatite?. Plagioclase phenocrysts are up to 2.5 mm and often display strong normal zoning and are rounded. Clinopyroxene phenocrysts are up to 0.55 mm. Orthopyroxene phenocrysts are up to 1.0 mm and some have resorption embayments or opaque inclusions. Opaque phenocrysts are up to 0.2 mm. 95.5% matrix, 3.4% plagioclase, 0.6% orthopyroxene, 0.2% clinopyroxene, 0.3% vesicles.94SJP96LavaWhole-rock 69.22 0.58 14.95 3.63 0.09 0.55 1.78 5.13 3.83 0.14 100.5955DCP4.043.63LOI=0.11DCP 89 981 205 45 534 15.9 11.6 4.2 10 8 3 2 11 73 18.2 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.