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Chemical weathering of a marine terrace chronosequence, Santa Cruz, California I: Interpreting rates and controls based on soil concentration–depth profiles

Dates

Year
2008

Citation

White, Art F, Schulz, Marjorie S, Vivit, Davison V, Blum, Alex E, Stonestrom, David A, and Anderson, Suzanne P, 2008, Chemical weathering of a marine terrace chronosequence, Santa Cruz, California I: Interpreting rates and controls based on soil concentration–depth profiles: Geochimica et Cosmochimica Acta, v. 72, iss. 1, p. 36-68.

Summary

The spatial and temporal changes in element and mineral concentrations in regolith profiles in a chronosequence developed on marine terraces along coastal California are interpreted in terms of chemical weathering rates and processes. In regoliths up to 15 m deep and 226 kyrs old, quartz-normalized mass transfer coefficients indicate non-stoichiometric preferential release of Sr > Ca > Na from plagioclase along with lesser amounts of K, Rb and Ba derived from K-feldspar. Smectite weathering results in the loss of Mg and concurrent incorporation of Al and Fe into secondary kaolinite and Fe-oxides in shallow argillic horizons. Elemental losses from weathering of the Santa Cruz terraces fall within the range of those for other marine [...]

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Communities

  • USGS National Research Program

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Provenance

Added to ScienceBase on Thu Apr 18 09:20:35 MDT 2013 by processing file <b>Geochemical Reactions Between Water and Mineral Substrates.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13">https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.1016/j.gca.2007.08.029

Citation Extension

journalGeochimica et Cosmochimica Acta
parts
typePages
value36-68
typeVolume
value72
typeIssue
value1
citationTypeJournal Article

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