AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 96-ARh-56

SAMPLE INFO : 96-ARh-56
Sample ID:96-ARh-56
Station ID:96-ARh-56
Latitude:54.1488
Longitude:-165.92628
Datum:NAD83
Date Sampled:1996-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Field Lithology:Andesite
Final Unit:llv
Text Description:
Qld - Long Valley domes. Massive, structureless bodies, as much as 1 km in diameter, enclosed in mineralogically similar monolithologic breccias. Rock is dark gray to olive black, porphyritic andesite (59.6% SiO2) containing phenocrysts of plagioclase (5-20%, 2-4 mm), clinopyroxene (trace-3%, 2-4 mm), orthopyroxene (trace -3%, 1-4 mm), and olivine (0-trace) in a cryptocrystalline to pilotaxitic groundmass. Whole rock 40Ar/39Ar mean age of andesite (loc E) is 0.58 +/- 0.04 Ma).

References:
Geologic map of Akutan Island, Alaska
The eruptive history, magmatic evolution, and influence of glacial ice at long-lived Akutan volcano, eastern Aleutian Islands, Alaska

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
96-ARh-5654.1488-165.92628Richter, D. H.1996-00-00 580000 ± 40000 40Ar/39Ar; 924; date of the unitAkutanlat/long estimated from paper mapQld - Long Valley domes. Massive, structureless bodies, as much as 1 km in diameter, enclosed in mineralogically similar monolithologic breccias. Rock is dark gray to olive black, porphyritic andesite (59.6% SiO2) containing phenocrysts of plagioclase (5-20%, 2-4 mm), clinopyroxene (trace-3%, 2-4 mm), orthopyroxene (trace -3%, 1-4 mm), and olivine (0-trace) in a cryptocrystalline to pilotaxitic groundmass. Whole rock 40Ar/39Ar mean age of andesite (loc E) is 0.58 +/- 0.04 Ma).96-ARh-56LavallvWhole-rock 59.59 0.805 17.38 6.58 0.239 2.8 6.22 4.44 1.75 0.195 924XRF6.58 0.855047309 35.6340791 475.2708552 358.0582102 12.22624177 28.23387363 3.97235045 17.81466801 4.881839977 1.393136425 5.177758406 0.878144534 5.668784678 1.207584547 3.417002449 0.496850975 3.219124471 0.512906302 31.97808485 149.8403609 3.037270134 4.388099169 0.233190364 6.335401191 4.250367226 1.983861144 19.2075587 145 23 5 37 72 19 924ICPMS: Cs, Rb, Ba, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Sc; XRF: V, Cr, Ni, Cu, Zn, Ga;

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

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.