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SAMPLE INFO : 87-ARh-29
Sample ID:87-ARh-29
Station ID:87-ARh-29
Latitude:62.1738
Longitude:-144.0294
Datum:NAD83
Date Sampled:1987-00-00
Sample Type 1:Lava
Field Lithology:Basaltic Andesite
Sample Unit:Qso
Text Description:
Mount Sanford older volcanic rocks (Pleistocene). Chiefly a sequence of interlayered thick lava flows, flow breccia, and debris and mudflow deposits that are mostly of andesitic of basaltic andesite composition; locally palagonitized. The few samples that were collected from unit are microporphyritic to porphyritic olivine basaltic andesite. * * * Flows and breccias are locally separated from overlying Sanford lava flows (Qsl) by slight angular unconformity. Source or sources unknown; maximum thickness about 450 m, but base not exposed.

References:
Geologic map of the Gulkana A-1 Quadrangle, south-central Alaska

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
87-ARh-2962.1738-144.0294Richter, D. H.1987-00-00SanfordMount Sanford rocks within Gulkana A-1 quadrangle. Latitude and longitude derived from paper map.Mount Sanford older volcanic rocks (Pleistocene). Chiefly a sequence of interlayered thick lava flows, flow breccia, and debris and mudflow deposits that are mostly of andesitic of basaltic andesite composition; locally palagonitized. The few samples that were collected from unit are microporphyritic to porphyritic olivine basaltic andesite. * * * Flows and breccias are locally separated from overlying Sanford lava flows (Qsl) by slight angular unconformity. Source or sources unknown; maximum thickness about 450 m, but base not exposed.87-ARh-29Whole Rock 54.3 1.42 17.2 8.11 0.13 4.88 8.12 3.76 1.13 0.33 100.242262NN3.45.01H2OP=0.36; H2OM=0.2; CO2=0.01RAPIDA

SAMPLE LOCATION

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