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SAMPLE INFO : SG05-47
Sample ID:SG05-47
Station ID:SG05-47
Latitude:56.59525204458
Longitude:-169.73465618156
Datum:NAD83
Date Sampled:0000-00-00
Sample Type 1:Lava
Text Description:
St. George Island, Group 3 type rocks (from Chang and others, 2009): "Most group 3 rocks are distinguished petrographically by their coarse-grained and plagioclase-rich nature. Group 3 rocks also contain abundant olivine phenocrysts and a few clinopyroxene and opaque phenocrysts. Olivine compositions for seven rocks range from Fo85 to Fo47 and average Fo75. Clinopyroxene phenocrysts have XMg compositions between 85 and 78, with an average of 81. Plagioclase compositions for five rocks range from An69 to An21 and average An59. Plagioclase commonly contains apatite inclusions and may exhibit deformation twinning. Although plagioclase grains were counted as phenocrysts based on their size, grains in several rocks have acicular habits, suggesting that they grew to a large size from relatively slow and prolonged cooling following eruption in the interiors of thick flows. Group 3 rocks sometimes exhibit a trachytic texture and have few, if any, vesicles."

References:
Petrogenesis of basaltic volcanic rocks from the Pribilof Islands, Alaska, by melting of metasomatically enriched depleted lithosphere, crystallization differentiation, and magma mixing

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
SG05-47 56.59525204458 -169.73465618156 Unknown, Unknown 0000-00-00 St. George volcanic field Group 3 St. George Island, Group 3 type rocks (from Chang and others, 2009): "Most group 3 rocks are distinguished petrographically by their coarse-grained and plagioclase-rich nature. Group 3 rocks also contain abundant olivine phenocrysts and a few clinopyroxene and opaque phenocrysts. Olivine compositions for seven rocks range from Fo85 to Fo47 and average Fo75. Clinopyroxene phenocrysts have XMg compositions between 85 and 78, with an average of 81. Plagioclase compositions for five rocks range from An69 to An21 and average An59. Plagioclase commonly contains apatite inclusions and may exhibit deformation twinning. Although plagioclase grains were counted as phenocrysts based on their size, grains in several rocks have acicular habits, suggesting that they grew to a large size from relatively slow and prolonged cooling following eruption in the interiors of thick flows. Group 3 rocks sometimes exhibit a trachytic texture and have few, if any, vesicles." SG05-47 Lava Whole Rock 49.31641 2.06788 14.30856 11.44804 0.17433 9.03879 9.04996 3.42624 0.9065 0.3821 98.962024882XRF11.44804 0.085542579 10.08032912 147.2275801 448.1387845 17.89565085 35.28709023 4.255474056 18.89009955 5.138729161 1.835468225 5.412160312 0.872818508 5.062933697 0.950484139 2.381125236 0.315585532 1.890895234 0.276434057 24.66957983 137.2667994 24.11434909 3.588411246 1.522701894 1.477747813 1.745626329 0.510735169 25.93882649 4882ICPMS 9.5 151.8 439 18.4 38 24 142.2 23.1 4 0.8 25.2 214 317.3 158.5 104.5 4882XRF

SAMPLE LOCATION

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