ScholarSpace will be brought offline for upgrades on Wednesday December 9th at 11AM HST. Service will be disrupted for approximately 2 hours. Please direct any questions to

Item Description

Show full item record

Title: Radiometric ages of selected Hawaiian corals 
Author: Hammond, Dale Alden
Date: 1971
Publisher: [Honolulu]
Abstract: A new scheme for the separation of uranium and thorium from one another and from other interfering ions, especially calcium, aluminum and iron was developed using mixed solvent systems and Biorad AG-l X8 resin. The complete separation takes place in one column operation after an initial precipitation procedure to reduce the ionic strength of the solution such that it will be soluble in the mixed solvent system. An automatic elution and fraction collector was developed to further facilitate the ion exchange separation. This allows the entire separation to take place without operator attention after the initial set up. The elution system automatically changes elution reservoirs and controls the liquid level above the resin bed. The fraction collector allows collection in constant time, constant volume and constant number of drops modes and is especially convenient for ion exchange column developmental work. In the constant volume mode, provision is made to collect each elution fraction separately and with an absolute minimum of cross contamination. These systems were applied to the separation of uranium and thorium from corals from the island of Oahu, Hawaii. Computer programs were developed to load the alpha spectrometric data of these analyses as outputed on Teletype 8 level ascii code into a computer, plot a graph of the data, total the counts under each peak, and calculate the age of the sample. These resultant ages are discussed as to geologic implication.
Description: Typescript. Thesis (Ph. D.)--University of Hawaii, 1971. Bibliography: leaves 159-166. xi, 166 l illus., tables
Rights: All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Keywords: Corals -- Hawaii, Corals, Fossil, Radioactive dating

Item File(s)

Description Files Size Format View
Restricted for viewing only uhm_phd_7224372_r.pdf 3.948Mb PDF View/Open
For UH users only uhm_phd_7224372_uh.pdf 3.900Mb PDF View/Open

This item appears in the following Collection(s)


Advanced Search


My Account