AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 91CND28

SAMPLE INFO : 91CND28
Sample ID:91CND28
Station ID:91CND28
Latitude:58.925941
Longitude:-153.658
Datum:NAD83
Date Sampled:1991-01-01
Sample Type 1:Lava
 Text Description:
Sample from tongue of lava flows 2.4 wide by 4.5 km long, and from seven to twelve kilometers from the summit. These lavas overlie sedimentary country-rock at elevations as high as 1700 feet. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (10%, up to 1.5 x 0.5 mm) and pyroxene (10%, stubby prisms up to 0.5 mm in diameter), and glomerocrysts of plagioclase and pyroxene (5%, up to 1 mm in diameter, often with masses of wormy opaques in the center) up to up to 0.4 x 0.2 mm) in a groundmass of devitrified glass and subordinate coarse microphenocrysts and microlites. Most plagioclase crystals have well developed sieve textures either throughout or in broad concentric zones.

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

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
91CND2858.925941-153.658Nye, C. J.1991-07-25 DouglasSample from tongue of lava flows 2.4 wide by 4.5 km long, and from seven to twelve kilometers from the summit. These lavas overlie sedimentary country-rock at elevations as high as 1700 feet. Porphyritic two-pyroxene andesite. Phenocrysts of plagioclase (10%, up to 1.5 x 0.5 mm) and pyroxene (10%, stubby prisms up to 0.5 mm in diameter), and glomerocrysts of plagioclase and pyroxene (5%, up to 1 mm in diameter, often with masses of wormy opaques in the center) up to up to 0.4 x 0.2 mm) in a groundmass of devitrified glass and subordinate coarse microphenocrysts and microlites. Most plagioclase crystals have well developed sieve textures either throughout or in broad concentric zones.91CND28LavaWhole-rock 57.94 0.703 17.2 0.128 4.88 8.25 3.4 0.966 0.14 100.3713291XRF6.4 0.38735 21 274 398 0 13 2.87956 12.63914 3.28915 0.99184 3.4929 0.59309 3.64858 0.78541 2.15294 0.32696 2.05942 0.32797 20 97 1.1 2.50696 0.1094 4 2 1.10181 28 202 77 23 97 69 17 13291ICPMS: Cs, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, U; XRF: Rb, Ba, Sr, Ce, Y, Zr, Nb, Pb, Th, Sc, V, Cr, Ni, Cu, Zn, Ga;

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.