+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

Distribution and characterization of short-range-order minerals in Spodosols from the Washington Cascades



Distribution and characterization of short-range-order minerals in Spodosols from the Washington Cascades



Geoderma 48(3-4): 391-413



Short-range-order minerals were examined in a subalpine Spodosol formed from mixed tephra-andesitic glacial drift in the Cascade Range of Washington State. The short-range-order mineral fraction was examined using selective dissolution, IR spectroscopy, scanning and transmission electron microscopy, and potentiometric titrations. Short-range-order minerals represented less than 5% of the inorganic, smaller than 2-.mu.m fraction in the E horizon, and from 20 to 50% in the B and C horizons. Thick surface coatings were found on the sand-sized grains of the B horizons, but these coatings were absent in the E horizon. The coatings in the Bhs horizon were dominated by humic substances, ferrihydrite, and geothite; in the Bs horizons, imogoite, ferrihydrite, and goethite were the primary constituents. Concentrations of both ferrihydrite and imogolite decreased with depth. The variable charge surfaces of the short-range-order minerals stongly influenced the surface chemistry in the B horizons. The point of zero salt effect (PZSE) occurred at pH 3.6 and 4.7 for the Bhs and Bs horizions, respectively. There was no unique PZSE in the E horizon because of the absence of variable charged substances. Short-range-order minerals play important roles in ecosystem processes through their influence on acid/base buffering, sorption, and regulation of aqueous ion activities.

(PDF emailed within 0-6 h: $19.90)

Accession: 002074554

Download citation: RISBibTeXText

DOI: 10.1016/0016-7061(91)90056-y



Related references

Distribution and characterization of noncrystalline components in spodosols from the Washington Cascades. Agronomy Abstracts 81: 320, 1989

Characterization of citric acid induced transformation of short-range-order minerals in Alfisol, Inceptisol and Vertisol of India. European Journal of Mineralogy 27(4): 551-557, 2015

Short-range order in minerals; amphiboles. Program with Abstracts - Geological Association of Canada(Mineralogical Association of Canada: Joint Annual Meeting 30: 81, 2005

The genesis of Spodosols and the role of vegetation in the Cascade Range of Washington, U.S.A. Proceedings - International Soil Correlation Meeting (ISCOM) 5: 370-380, 1990

Short range order minerals in the Atlantis II Deep, Red Sea, hydrothermal sediments. Annual Meeting - Israel Geological Society 1998: 102, 1998

Defects and short-range order in nepheline group minerals; a Si-29 NMR study. Eos, Transactions, American Geophysical Union 66(46): 1116, 1985

Effects of tephra addition on soil processes in spodosols in the cascade range washington usa. Geoderma 45(3-4): 331-356, 1989

Hydrous iron oxide minerals with short range order deposited in a spring. Australian journal of soil research0(2): 119-129, 1982

Short and medium range order in nickeliferous clay minerals by X-ray absorption spectroscopy. Pages 547-552 1985, 1985

Role of short-range order in the process of disordering minerals; an example of melilite-type structure. Geokhimiya 1988(7): 931-941, 1988

Aluminum fractionation of soil solutions from unperturbed and tephra-treated Spodosols, Cascade Range, Washington, USA. Soil Science Society of America journal 53(2): 559-566, 1989

Removal of short-range-order minerals prior to grain-size analysis of volcanic ash soils. Journal of Plant Nutrition and Soil Science 173(6): 799-804, 2010

Clay carbon pools and their relationship with short-range order minerals: avenues to mitigate climate change?. Current Science 105(10): 1404-1410, 2013

Defects and short-range order in nepheline group minerals; a silicon-29 nuclear magnetic resonance study. Physics and Chemistry of Minerals 13(6): 371-381, 1986

Pretreatment of Soil Samples Rich in Short-Range-Order Minerals Before Particle-Size Analysis by the Pipette Method. Pedosphere 23(1): 20-28, 2013