AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 91CNI21i

SAMPLE INFO : 91CNI21i
Sample ID:91CNI21i
Station ID:91CNI21i
Latitude:59.99421
Longitude:-153.16789
Datum:NAD83
Date Sampled:0000-00-00
Sample Type 1:Lava
Sample Type 2:Enclave/Inclusion
Text Description:
Basaltic andesite magmatic inclusion. 15% phenocrysts of plagioclase and pyroxene. Groundmass is dominantly crystalline and consists of 30 x 200 micron plagioclase laths, 150 micron pyroxene, opaque oxides, and subordinate clear glass. Irregular voids largely bounded by crystals are abundant. Sparse chromite-bearing olivine crystals up to 1 x 2 mm have highly birefringent reaction halos. One of several diverse lithologies collected from single location consisting of avalanche debris sitting on top of Umbrella Glacier at ~2200 foot elevation. Location implies these all came from Iliamna, central peak. "i" denotes fist-sized rounded blobs of macroscopically different magma enclosed in homogeneous host.

References:
Geochemistry of some Quaternary lavas from the Aleutian Arc and Mt. Wrangell

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Geologic 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
91CNI21i59.99421-153.16789Nye, C. J.1991-07-28 IliamnaLatitude and longitude determined using Google Earth.Basaltic andesite magmatic inclusion. 15% phenocrysts of plagioclase and pyroxene. Groundmass is dominantly crystalline and consists of 30 x 200 micron plagioclase laths, 150 micron pyroxene, opaque oxides, and subordinate clear glass. Irregular voids largely bounded by crystals are abundant. Sparse chromite-bearing olivine crystals up to 1 x 2 mm have highly birefringent reaction halos. One of several diverse lithologies collected from single location consisting of avalanche debris sitting on top of Umbrella Glacier at ~2200 foot elevation. Location implies these all came from Iliamna, central peak. "i" denotes fist-sized rounded blobs of macroscopically different magma enclosed in homogeneous host. 91CNI21iLavaWhole-rock 54.31 0.708 18.99 0.152 4.94 9.06 3.7 0.577 0.132 100.5213291XRF7.42 0.38766 7.00464 231.99383 5.60074 12.27028 1.87569 8.72332 2.38228 0.9121 2.64849 0.46007 2.94599 0.60599 1.6887 0.25913 1.67904 0.27404 15.75554 1.25041 1.4603 0.0872 4.45428 0.63511 0.41082 13291ICPMS 6 201 484 4 15 16 70 3 0 17 229 40 21 0 87 1813291XRF

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: 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