AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP104A

SAMPLE INFO : 94SJP104A
Sample ID:94SJP104A
Station ID:94SJP104A
Latitude:62.41379182
Longitude:-143.0901906
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Dacite
Text Description:
Float boulders in Finger Creek Bed from the upper part of Dome C. Fine grained, vesicular, holocrystalline, porphyritic to glomeroporphyritic with a matrix of cryptocrystalline material, feldspar, orthopyroxene, opaque and minor alteration. Plagioclase phenocrysts (An33 - An57) are up to 0.94 mm and commonly are oscillatory zoned; some have resorption embayments and cores tend to have large holes present. Amphibole phenocrysts are up to 1.7 mm, most are dehydrated to fine opaque, with only a few amphibole cores preserved. Orthopyroxene phenocrysts are up to 0.6 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.25 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
94SJP104A62.41379182-143.0901906Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R12E, S1Float boulders in Finger Creek Bed from the upper part of Dome C. Fine grained, vesicular, holocrystalline, porphyritic to glomeroporphyritic with a matrix of cryptocrystalline material, feldspar, orthopyroxene, opaque and minor alteration. Plagioclase phenocrysts (An33 - An57) are up to 0.94 mm and commonly are oscillatory zoned; some have resorption embayments and cores tend to have large holes present. Amphibole phenocrysts are up to 1.7 mm, most are dehydrated to fine opaque, with only a few amphibole cores preserved. Orthopyroxene phenocrysts are up to 0.6 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.25 mm.94SJP104ALavaWhole-rock 69.1 0.48 15.94 3.09 0.06 1.04 3.03 4.52 2.17 0.09 100.4455DCP3.433.09LOI=0.49DCP 40 743 434 18 37.6 14.6 2.7 0.8 2.4 2.2 1.3 1.4 0.2 13 147 5.6 3.3 1.9 5 54bdl 3 9 47 15.7 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, La, Ce, Nd, Sm, Eu, Gd, Dy, Er, Yb, Lu, Sc, V; MX: Sr, Y, 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.