Importance of mechanical disaggregation in chemical weathering in a cold alpine environment, San Juan Mountains, Colorado
Geological Society of America Bulletin
By: A.R. Hoch, M.M. Reddy, and J.I. Drever
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Abstract
Weathering of welded tuff near the summit of Snowshoe Mountain (3660 m) in southwestern Colorado was studied by analyzing infiltrating waters in the soil and associated solid phases. Infiltrating waters exhibit anomalously high potassium to silica ratios resulting from dissolution of a potassium-rich glass that occurs as a trace phase in the rock. In laboratory experiments using rock from the field site, initial dissolution generated potassium-rich solutions similar to those observed in the field. The anomalous potassium release decreased over time (about 1 month), after which the dominant cation was calcium, with a much lower potassium to silica ratio.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Importance of mechanical disaggregation in chemical weathering in a cold alpine environment, San Juan Mountains, Colorado |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(1999)111<0304:IOMDIC>2.3.CO;2 |
| Volume | 111 |
| Issue | 2 |
| Year Published | 1999 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 11 p. |
| First page | 304 |
| Last page | 314 |
| Country | United States |
| State | Colorado |
| Other Geospatial | San Juan Mountains |
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