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Sample info : SG05-43
Sample ID:SG05-43
Station ID:SG05-43
Latitude:56.605623104386
Longitude:-169.76439906596
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:
StationIDlatitudelongitudeGeologistDateVisitedVolcanoLocationDescriptionTextDescriptionSample IDSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
SG05-4356.605623104386-169.76439906596Unknown, Unknown0000-00-00St. George volcanic fieldGroup 3St. 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."SG05-43 48.623780851313 2.860123027991 16.268768650498 12.158237884339 0.18460831778002 5.1042769597377 8.9640646000595 4.1323885820605 1.5089128547585 0.62215656344133 96.485364882XRF12.158237884339 0.229418664 15.9694845 211.6956278 690.52744 29.03790161 57.05832989 6.82510633 29.52404771 7.4729669 2.525007448 7.301353091 1.119484915 6.316908309 1.177602661 2.841529529 0.383859748 2.192242009 0.322230372 30.09157848 216.7433928 40.66804163 5.279121782 2.580128238 1.95023414 2.807475843 0.961999868 21.43972672 4882ICPMS 16.1 222.3 683.3 27 60 28.5 217.1 37.4 2.9 3.2 20.6 246.1 17.9 25.9 119.2 4882XRF


Sample Location

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