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SAMPLE INFO : 24MW1-1
Sample ID:24MW1-1
Station ID:24MW1-1
Latitude:56.60277
Longitude:-169.54196
Datum:NAD83
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
StationIDLatitudeLongitudeGeologistDateVisitedVolcanoLocation 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
24MW1-156.60277-169.54196Unknown, UnknownSt. 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."24MW1-1Whole Rock 46.654974198846 2.5273978852178 14.4364804996 12.239902934965 0.18856638854814 8.9214205334604 10.117701923174 3.2036010097426 1.3179371242612 0.55860258112917 98.6394882XRF12.239902934965 16 228 556 22 70 27 197 43.6 0 5 27 239 257 142 108 4882XRF

SAMPLE LOCATION

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