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Silica coatings on young Hawaiian basalts: Constraints on formation mechanism from silicon isotopes

Chemtob, S. M. and Hurowitz, J. A. and Guan, Y. and Ziegler, K. and Eiler, J. M. and Rossman, George R. (2011) Silica coatings on young Hawaiian basalts: Constraints on formation mechanism from silicon isotopes. Mineralogical Magazine, 75 (3). p. 649. ISSN 0026-461X. https://resolver.caltech.edu/CaltechAUTHORS:20130806-135600586

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Abstract

Young basalts from Kilauea, on the big island of Hawai’i, frequently feature visually striking, white, orange and blue coatings, consisting of a 10-50 μm layer of amorphous silica, capped, in some cases, by a ~1 μm layer of Fe-Ti oxide [1]. The coatings provide an opportunity to study the early onset of acid-sulfate weathering, a process common to many volcanic environments. Silicon isotopes fractionate with the precipitation of clays and opaline silica, and have been demonstrated to be an indicator of weathering intensity [2,3]. Here we report in situ measurements of δ^(30)_Si of the silica coatings and their implications for coating formation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://minmag.geoscienceworld.org/content/75/3.tocPublisherIssue Table of Contents
http://goldschmidt.info/2011/abstracts/view.htmlOtherConference Website Abstracts
ORCID:
AuthorORCID
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2011 by the Mineralogical Society of Great Britain and Ireland. Open Access Article. Published online 1 August 2011.
Issue or Number:3
Record Number:CaltechAUTHORS:20130806-135600586
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130806-135600586
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39789
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Aug 2013 18:44
Last Modified:03 Oct 2019 05:10

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