SSSAJ Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 35:626-631 (1971)
© 1971 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Borchardt, G. A.
Right arrow Articles by Harward, M. E.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Borchardt, G. A.
Right arrow Articles by Harward, M. E.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Borchardt, G. A.
Right arrow Articles by Harward, M. E.

Trace Element Correlation of Volcanic Ash Soils1

G. A. Borchardt and M. E. Harward2

ABSTRACT

Neutron activation of volcanic ash followed by gamma-ray detection with a Ge(Li) semiconductor detector and 4096 multichannel analyzer produced rapid analysis for 19 elements. This was demonstrated to be useful for correlating soil parent materials. The trace element compositions of volcanic glass from C horizons of soils along a 450-km transect in Oregon correlate with known ejecta from Mt. Mazama. Concentration of transition metals in upper horizons relative to C horizons occurred in the order Cr > Co > Fe = Sc. Ratios of Na/Fe and Na/Co increased with depth. The abundances of Hf, Th, and the rare earth elements, as well as Sc/Fe ratios, were relatively constant with depth. Stable elemental ratios unique to Mazama ash aided correlation of weathered soil horizons. Some of the soils of northeastern Oregon may have small amounts of St. Helens ash in upper horizons in addition to the predominant Mazama ash.

NOTES

1 Technical Paper no. 2971, Oregon Agr. Exp. Sta., Corvallis. Financial support through Atomic Energy Commission contract AT (45-1)-2062 is gratefully acknowledged. Presented before Div. S-5 and S-9, Soil Science Society of America, Nov. 13, 1969, Detroit, Mich.

2 NRC Postdoctoral Research Associate, Nuclear Science Building, USGS, Denver Federal Center, Denver, Colo. 80225 (formerly Graduate Research Assistant in Soils, Oregon State Univ.); and Professor, Department of Soils, Oregon State Univ., respectively.

Received for publication November 24, 1970. Accepted for publication March 19, 1971.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1971 by the Soil Science Society of America.