AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 10AZnye03h

SAMPLE INFO : 10AZnye03h
Sample ID:10AZnye03h
Station ID:10AZ-h3
Latitude:51.92876
Longitude:-176.55292
Datum:NAD83
Date Sampled:2010-01-01
Sample Type 1:Lava
Sample Type 2:Dome
 Text Description:
This outcrop is a large lava mass consisting of host lava with abundant rounded magmatic inclusions several cm to 10s of cm across. Host is porphyritic pl-hb andesite w/ 15% pl (5-10mm) and 5% hb (1-3mm) in a fine-grained light greenish-grey gms. Inclusions are very fine-grained and equigranular with pl, px, hb in randomly oriented xl <<1mm (save a few percent mm-sized hb crystals). Northernmost of three domes shown by Coats (1956, USGS Bull 1028-C), who calls these, and two others near downtown Adak, Ta, Andesite porphyry domes. Coats notes these domes are glaciated (thus pre-late Pleistocene), but don't share the structural style of surrounding Finger Bay volcanics (thus not buried, much younger). Coats assigns an early Tertiary age (but he assigns late T to Moffett and Adagdak volcanoes; mid T to Andrew Bay volcano; and Paleozoic to Finger Bay volcs -- clearly too old. My guess would be early to mid Pleistocene for these domes.).

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
10AZ-h351.92876-176.55292Nye, C. J.2010-08-10 AZ stands for "Adak Zeto". Samples are from the northernmost of three domes along the eastern margin of a 1x2.5 km of slightly raised topography (which is connected by tombolos to Adagdak (north) and the main island (west) and forms the southeast margin of Clam Lagoon). Samples are from the prominent quarry on the west side of this dome adjacent to the road.This outcrop is a large lava mass consisting of host lava with abundant rounded magmatic inclusions several cm to 10s of cm across. Host is porphyritic pl-hb andesite w/ 15% pl (5-10mm) and 5% hb (1-3mm) in a fine-grained light greenish-grey gms. Inclusions are very fine-grained and equigranular with pl, px, hb in randomly oriented xl <<1mm (save a few percent mm-sized hb crystals). Northernmost of three domes shown by Coats (1956, USGS Bull 1028-C), who calls these, and two others near downtown Adak, Ta, Andesite porphyry domes. Coats notes these domes are glaciated (thus pre-late Pleistocene), but don't share the structural style of surrounding Finger Bay volcanics (thus not buried, much younger). Coats assigns an early Tertiary age (but he assigns late T to Moffett and Adagdak volcanoes; mid T to Andrew Bay volcano; and Paleozoic to Finger Bay volcs -- clearly too old. My guess would be early to mid Pleistocene for these domes.).10AZnye03hLavaWhole-rock 61.03 0.5 16.92 0.125 3.36 7.62 3.38 1.283 0.112 97.5413291XRF5.67 1.17495 31 652 634 12 19 2.9679 9 2.47588 0.82442 2.23667 0.34414 2.04223 0.41497 1.14504 0.16585 1.13701 0.18661 11 79 2.1 2.29772 0.15727 8 3 1.76697 19 164 59 17 37 51 17 13291ICPMS: Cs, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, U; XRF: Rb, Ba, Sr, La, Ce, Nd, Y, Zr, Nb, Pb, Th, Sc, 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 G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.