Soil chemistry in lithologically diverse datasets: The quartz dilution effect

Weathering, dust, and biocycling effects on soil silicon isotope ratios

“…Similarly, several chronologically distinct steps of fractionation were identified during secondary quartz precipitation in a sandstone aquifer (Basile-Doelsch et al, 2005). Still, much of the variability in near-surface soil d 30 Si remains unexplained (Ziegler et al, 2005a) because patterns and trends that result from one factor or process in soil are often obscured through overprinting by others (Bern, 2009), particularly where mineral and biotic fractionations of Si are overlapping in time and space.…”

The distribution of selected elements and minerals in soil of the conterminous United States

“…Thus, the spatial distribution of these elements is, in part, controlled by processes that concentrate or dilute quartz rather than processes related to the geochemical behaviour of these elements themselves. It is important when interpreting the cause of geographical variation of many elements to assess what portion of that variability is caused solely by this 'quartz effect' (Bern, 2009). …”

Geochemical and mineralogical data for soils of the conterminous United States

“…It plays a vital role in (1) determining human health and ecosystem integrity; (2) supporting food production; (3) water storage and ground water recharge; and (4) global study at a more regional scale-a 20,000-square-kilometer (km 2 ) area of northern California-was conducted as a model for higher-resolution, process-oriented follow-up studies that might be performed on areas of interest selected from the low-density continental-scale mapping. The results of these pilot studies were published as 21 papers in a special issue of "Applied Geochemistry" in August 2009 (Bern, 2009;Cannon and Horton, 2009;Chiprés and others, 2009 a, b;Eberl and Smith, 2009;Garrett, 2009;Garrett and others, 2009;Goldhaber and others, 2009;Griffin and others, 2009;Grunsky and others, 2009;Holloway and others, 2009;Klassen, 2009;McCafferty and Van Gosen, 2009;Morman and others, 2009;Morrison and others, 2009;Reeves and Smith, 2009;Smith and others, 2009;Tuttle and others, 2009;Wanty and others, 2009;Woodruff and others, 2009). Smith and others (2009) and Chiprés and others (2009a) give details of the design, sample collection, and analytical protocols for the continental-scale pilot study, and Goldhaber and others (2009) provide similar information for the northern California regional-scale pilot study.…”