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SAMPLE INFO : SWPT3
Sample ID:SWPT3
Station ID:SWPT3
Latitude:57.18
Longitude:-170.3
Datum:NAD83
Sample Type 1:Lava
Sample Type 2:Flow
Text Description:
From Feeley and Winer (1999): "Samples prefixed SWP- were collected from lava flows that are well exposed in coastal cliffs at Southwest Point. Here at least two lava flows are present. The lower flow (SWPB1) is ~2.4 m thick and has poorly developed columnar jointing. This flow is covered by a thin layer (~0.5 m) of sediments, suggesting a significant hiatus prior to eruption of the overlying units. Sampels SWPT1, -2, and -3 are from thin (<1m) poorly vesiculated lava horizions separated by autoclastic breccia zones. Although these units are petrographically distinct in hand specimen and thin section, geochemically they are very similar, suggesting that they represent either eruption of three compositionally similar flows or different lobes of a single compound flow."

References:
Evidence for fractionation of Quaternary basalts on St. Paul Island, Alaska, with implications for the development of shallow magma chambers beneath Bering Sea volcanoes

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
SWPT357.18-170.3Winer, G. S.St. Paul IslandSouthwest Point, St. Paul IslandFrom Feeley and Winer (1999): "Samples prefixed SWP- were collected from lava flows that are well exposed in coastal cliffs at Southwest Point. Here at least two lava flows are present. The lower flow (SWPB1) is ~2.4 m thick and has poorly developed columnar jointing. This flow is covered by a thin layer (~0.5 m) of sediments, suggesting a significant hiatus prior to eruption of the overlying units. Sampels SWPT1, -2, and -3 are from thin (<1m) poorly vesiculated lava horizions separated by autoclastic breccia zones. Although these units are petrographically distinct in hand specimen and thin section, geochemically they are very similar, suggesting that they represent either eruption of three compositionally similar flows or different lobes of a single compound flow."SWPT3 45.539584733106 3.4951605658314 15.436105020945 11.657510507621 0.17424554140509 7.4515593294999 9.9114963846305 3.9973977145873 1.7629548895103 0.57398531286381 98.83115XRF12.6411.657510507621 24.8 44.8 25.2 6.17 2.15 0.86 1.67 0.16 4.72 2.56 20.7 51.4 115INAA 14 314 676 22 198 44.3 0 2 274 118 70 42 94 22115XRF

SAMPLE LOCATION

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Page modified: July 10, 2014 15:06
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