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Rare Earth Elements in Soils from Selected Areas on the Island of Hawaii

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Title:Rare Earth Elements in Soils from Selected Areas on the Island of Hawaii
Authors:Barnard, Walther M.
Halbig, Joseph B.
Date Issued:Jul 1985
Publisher:University of Hawai'i Press
Citation:Barnard WM, Halbig JB. 1985. Rare earth elements in soils from selected areas on the Island of Hawaii. Pac Sci 39(3): 241-260.
Abstract:Fifty soil samples from the wet, windward (east) side and dry,
leeward (west) side of the Island of Hawaii were analyzed for La, Ce, Sm, Eu, Yb,
and Lu by neutron activation/gamma-ray spectroscopic analysis. Data on concentrations
in each sample are listed and analyzed statistically for soil samples
collected from the western slope of Kohala Mountain, the western coastal plain
of Mauna Kea , and the northeastern coastal plain of Mauna Loa .
Rare earth element (REE) concentrations are two to six times greater in soils
from the western , dry side of the island ; arid good statistical correlation is
exhibited among the samples for pairs of individual REEs. In the organic-rich
soils of the east side, correlations are poor but are markedly improved when
sample weights are adjusted for weight due to organic matter and water in soil
If the mean compositions of selected rock samples from the Hawaii Reference
Suite are representative of the compositions of the parent materials,
REEs in the soils are moderately enriched (up to two times, based on oven-dry
weights). Rare earth element concentrations in the island 's western soils are as
much as two times greater than the mean REE values of common sedimentary
rock s worldwide; however , they are well within the concentration ranges of soils
of continental origin . The eastern soils tend to have less La and Ce, but similar
amounts of the middle and heavy REEs.
Appears in Collections: Pacific Science Volume 39, Number 3, 1985

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