AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP122A

SAMPLE INFO : 94SJP122A
Sample ID:94SJP122A
Station ID:94SJP122A
Latitude:62.24682401
Longitude:-143.4362967
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Rhyolite
Text Description:
Eastern-most sample collected from a rubbly dome outcrop of platy and blocky pieces at Site 15. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, orthopyroxene, plagioclase and minor alteration. Plagioclase phenocrysts (An38 - An47) are up to 3.0 mm and occasionally have rounded edges, oscillatory or normal zoning, and/or resorption embayments. Orthopyroxene phenocrysts are up to 0.95 mm. Opaque phenocrysts are up to 0.5 mm. There is a dehydrated phase that consists of fine grained opaque. 70.1% matrix, 19.4% plagioclase, 1.2% orthopyroxene, 0.5% opaque, 0.1% altered phase, 8.7% 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
94SJP122A62.24682401-143.4362967Preece, S. J.1994-00-00 Skookum CreekNabesna A-5; T5N, R11E, S6Eastern-most sample collected from a rubbly dome outcrop of platy and blocky pieces at Site 15. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of cryptocrystalline material, opaque, orthopyroxene, plagioclase and minor alteration. Plagioclase phenocrysts (An38 - An47) are up to 3.0 mm and occasionally have rounded edges, oscillatory or normal zoning, and/or resorption embayments. Orthopyroxene phenocrysts are up to 0.95 mm. Opaque phenocrysts are up to 0.5 mm. There is a dehydrated phase that consists of fine grained opaque. 70.1% matrix, 19.4% plagioclase, 1.2% orthopyroxene, 0.5% opaque, 0.1% altered phase, 8.7% vesicles.94SJP122ALavaWhole-rock 70.15 0.33 16.06 2.61 0.1 0.87 2.51 5.22 1.96 0.12 99.5755DCP2.882.61LOI=0.08DCP 35 729 368 17 189 8.1 4.4 0.7 4.1 18 1 1 8 57 15.7 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.