Geological controls on soil parent material geochemistry along a northern Manitoba-North Dakota transect

Applied Geochemistry
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Abstract

As a pilot study for mapping the geochemistry of North American soils, samples were collected along two continental transects extending east–west from Virginia to California, and north–south from northern Manitoba to the US–Mexican border and subjected to geochemical and mineralogical analyses. For the northern Manitoba–North Dakota segment of the north–south transect, X-ray diffraction analysis and bivariate relations indicate that geochemical properties of soil parent materials may be interpreted in terms of minerals derived from Shield and clastic sedimentary bedrock, and carbonate sedimentary bedrock terranes. The elements Cu, Zn, Ni, Cr and Ti occur primarily in silicate minerals decomposed by aqua regia, likely phyllosilicates, that preferentially concentrate in clay-sized fractions; Cr and Ti also occur in minerals decomposed only by stronger acid. Physical glacial processes affecting the distribution and concentration of carbonate minerals are significant controls on the variation of trace metal background concentrations.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Geological controls on soil parent material geochemistry along a northern Manitoba-North Dakota transect
Series title Applied Geochemistry
DOI 10.1016/j.apgeochem.2009.04.033
Volume 24
Issue 8
Year Published 2009
Language English
Publisher International Association of Geochemistry and Cosmochemistry
Publisher location New York, NY
Description 12 p.
First page 1382
Last page 1393
Online Only (Y/N) N
Additional Online Files (Y/N) N