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SAMPLE INFO : POL1
Sample ID:POL1
Station ID:POL1
Latitude:57.18
Longitude:-170.3
Datum:NAD83
Sample Type 1:Tephra Fall
Sample Type 2:Bomb
Text Description:
From Feeley and Winer (1999): "Polovina Hill is a cluster of several scoria cones, the largest of which is ~75 m high with a small water pond occupying the floor of the summit crater. The cone is surrounded by a ring of coarse bombs up to 1.5 m across and the surface is covered by poorly sorted ash, lapilli, blocks, and bombs. A borrow pit on the east flank of Polovina Hill exposes a small cross-section of the interior of the cone, which is characterized by poorly bedded and unconsolidated scoriaceous, red and black lapilli and bombs of various sizes ranging up to 0.5 m across. Sample POL1 is a poorly vesiculataed tachylitic bomb (~25 cm across) collected near the crater rim."

References:
Evidence for fractionation of Quaternary basalts on St. Paul Island, Alaska, with implications for the development of shallow magma chambers beneath Bering Sea volcanoes

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedVolcanoEruptionLocation DescriptionText DescriptionSample IDMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
POL157.18-170.3Winer, G. S.St. Paul IslandPolovina Hill, St. Paul Island. Sample POL1 is a poorly vesiculataed tachylitic bomb (~25 cm across) collected near the crater rim.From Feeley and Winer (1999): "Polovina Hill is a cluster of several scoria cones, the largest of which is ~75 m high with a small water pond occupying the floor of the summit crater. The cone is surrounded by a ring of coarse bombs up to 1.5 m across and the surface is covered by poorly sorted ash, lapilli, blocks, and bombs. A borrow pit on the east flank of Polovina Hill exposes a small cross-section of the interior of the cone, which is characterized by poorly bedded and unconsolidated scoriaceous, red and black lapilli and bombs of various sizes ranging up to 0.5 m across. Sample POL1 is a poorly vesiculataed tachylitic bomb (~25 cm across) collected near the crater rim."POL1Whole Rock 43.98 3.07 13.56 11.3 0.17 12.26 9.98 3.66 1.42 0.58 99.22115XRF12.311.3 27.1 47.6 26.7 5.69 1.97 0.72 1.46 0.17 4.13 2.89 20.6 62.6 115INAA 17 291 663 19 190 48.5 0 7 295 332 241 45 91 20115XRF

SAMPLE LOCATION

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Page modified: July 14, 2014 13:37
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