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Low-temperature alteration of dredged volcanics from the Southern Chile Ridge: Additional information about early stages of seafloor weathering

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Low-temperature alteration of dredged volcanics from the Southern Chile Ridge: Additional information about early stages of seafloor weathering; 1999; Article; Journal; Marine Geology; Pichler, T.; Ridley, W. I.; Nelson, E.

Summary

A suite of submarine volcanic rocks from the Southern Chile Ridge has been examined in order to investigate the early stages of low temperature alteration. Alteration in these samples proceeded as follows: (1) Fe-staining on sample surface and along fractures, (2) filling of vesicles with secondary material, (3) breakdown of glassy matrix, (4) breakdown of microcrystalline matrix, and (5) breakdown and replacement of olivine. Plagioclase and pyroxene were sometimes found to be slightly altered along internal fissures. Secondary or alteration phases generally showed high K (3-5 wt.%), Fe (30-70 wt.%) and low Al (< 2 wt.%) contents. The most common secondary minerals were Fe-oxyhydroxides, celadonite/Feoxyhydroxide (a mixture between [...]

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Harvested on Mon Jul 21 13:08:14 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 70021423
local-pk unknown 70021423
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1016/S0025-3227(99)00008-0
series unknown Marine Geology

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journalMarine Geology
parts
typevolume
value159
typeissue
value1-4
languageEnglish
citationTypeArticle

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