<p> Altered olivine tholeiite basalt on Mauna Ulu Volcano,
Hawaii was examined petrographically and chemically to determine
the mineralogy of the alteration products. Colour plays an
important role in determining a general trend of alteration. </p> <p> The processes involved in the formation of Mauna
Ulu have little effect on the alteration. The major influence
is the type of volcanic gas and its constant interaction with
the basaltic lava over an eight year period. The gas is
oxidized as it cools, resulting in a zoning of different
alteration products in a variety of colours and compositions. </p> <p> The major alteration phase was determined to be
amorphous opaline silica. Other species present are hematite
and sulphur, with minor halides, sulphates and sheet silicate
(chlorite). </p> / Thesis / Bachelor of Science (BSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19527 |
| Date | 04 1900 |
| Creators | Mathews, Catherine |
| Contributors | Burley, Brian, Geology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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