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SAMPLE INFO : SG01-008
Sample ID:SG01-008
Station ID:SG01-008
Latitude:56.60148517313
Longitude:-169.53087655364
Datum:NAD83
Date Sampled:0000-00-00
Sample Type 1:Lava
Text Description:
St. George Island, Group 2 type rocks (From Chang and others, 2009): "Group 2 rocks are generally porphyritic, with fine-grained, holocrystalline groundmasses of olivine, clinopyroxene, plagioclase, and opaque minerals. Olivine is the most common phenocryst phase, although a few plagioclase phenocrysts are commonly observed, and some rocks also contain clinopyroxene phenocrysts. Olivine phenocrysts in two rocks range from Fo91 to Fo69 and average Fo80. As in the group 1 rocks, the olivine phenocrysts may be skeletal to euhedral. Clinopyroxene compositions in one group 2 rock have XMg=85-79, with an average value of 83, with average core and rim compositions of XMg=84 and 81, respectively. Some clinopyroxene grains exhibit sector-zoning."

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
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
SG01-00856.60148517313-169.53087655364Unknown, Unknown0000-00-00St. George volcanic fieldGroup 2St. George Island, Group 2 type rocks (From Chang and others, 2009): "Group 2 rocks are generally porphyritic, with fine-grained, holocrystalline groundmasses of olivine, clinopyroxene, plagioclase, and opaque minerals. Olivine is the most common phenocryst phase, although a few plagioclase phenocrysts are commonly observed, and some rocks also contain clinopyroxene phenocrysts. Olivine phenocrysts in two rocks range from Fo91 to Fo69 and average Fo80. As in the group 1 rocks, the olivine phenocrysts may be skeletal to euhedral. Clinopyroxene compositions in one group 2 rock have XMg=85-79, with an average value of 83, with average core and rim compositions of XMg=84 and 81, respectively. Some clinopyroxene grains exhibit sector-zoning."SG01-008Whole Rock 47.62 2.31 14.1 11.96 0.172 10.13 9.3 3.04 1 0.359 99.9114882XRF11.96 7 143 426 10 44 22 145 26.6 0 0 32 215 272 209 105 4882XRF

SAMPLE LOCATION

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Page modified: July 14, 2014 13:37
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