Chloritized Weathering Products of a New England Glacial Till

R. M. Quigley1 and R. T. Martin
Soil Engineering Division, Massachusetts Institute of Technology, Cambridge, Massachusetts
1 Present address, Geocon Ltd., 180 Vallee Street, Montreal, Quebec.

Abstract: The clay mineralogy of a soil profile developed in a New England glacial till has been studied to a depth of 55 in. Degraded soil micas, probably produced by weathering, have been chloritized by both iron and aluminum hydroxide complexes. Aluminum and iron determinations and X-ray analyses indicate that iron chloritization has played the greater role. Citrate-extractable chlorite exists to a depth of 55 in. X-ray and heat stability data indicate that the chlorite is better developed or crystallized near the surface. X-ray and glycol retention data suggest that intense weathering at the surface has reduced the surface charge density of some of the degraded mica.

Clays and Clay Minerals; 1961 v. 10; no. 1; p. 107-116; DOI: 10.1346/CCMN.1961.0100110
© 1961, The Clay Minerals Society
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