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Mineral Assemblages of the Sediments of the Ala Wai Canal and Its Drainage Basins, O'ahu, Hawai'i

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Title:Mineral Assemblages of the Sediments of the Ala Wai Canal and Its Drainage Basins, O'ahu, Hawai'i
Authors:Fan, Pow-Foong
Ng, Roanna
Remular, Deanna
Date Issued:Oct 1995
Publisher:University of Hawaii Press
Citation:Fan P, Ng R, Remular D. 1995. Mineral assemblages of the sediments of the Ala Wai Canal and its drainage basins, O'ahu, Hawai'i. Pac Sci 49(4): 400-411.
Abstract:To understand the origin of the mineralogy of the sediments in
the Ala Wai Canal, 20 soil and stream sediment samples were collected from
Manoa, Palolo, and Makiki Valleys. X-ray diffraction analysis was used to
determine mineralogical composition. Four mineral assemblages are recognized:
plagioclase from mechanical weathering present in Makiki Valley and
pyroxene, olivine, plagioclase, and ilmenite in Manoa and Palolo Valleys; (2)
maghemite, hematite, and kaolinite present in all three valleys from chemical
weathering and gibbsite and goethite in Manoa Valley and goethite in Palolo
Valley; (3) quartz in all three valleys from aeolian deposition; and (4) pyrite,
calcite, and aragonite in the Ala Wai Canal, and kaolinite and gibbsite derived
from the watershed studied.
URI:http://hdl.handle.net/10125/2332
ISSN:0030-8870
Appears in Collections: Pacific Science Volume 49, Number 4, 1995


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