| Abstract: | Large amounts of chemical data, obtained in geothermal fields, may readily be sorted-out by the aid of a simple set of graphs that provide a clear over-all picture and facilitate the understanding of geochemical processes taking place. As a case study, data from several hundred samples of the thermal springs at the well-known Yellowstone National Park are discussed. The pattern obtained seems to indicate: (1) geochemical similarity between the spring groups of Heart Lake, Shoshone, Upper, Midway, Lower and Norris Geyser Basins, i.e., a geochemical uniformity of major spring groups located over 40 km apart; (2) these groups may be described as originating from a common fluid, most resembling the composition of Norris waters, accompanied by CO2, and other volatiles, that react with igneous rocks, forming local variations; (3) the secondary reactions occur at (medium) depth, before the ascent to the surface; (4) extensive concentration-dilution processes occur during the ascent to the surface. The water of the Mammoth group may be described as originating from the same Norris-like fluid that has been diluted (low Na and Cl contents) and intensively reacted with carbonaceous rocks, thus gaining in Ca, Mg, SO4, and HCO3. ?? 1982. |
| Genre: | Article |
| ProdID: | 70011678 |
| Citation Author: | Mazor, E.; Thompson, J. M. |
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| Citation End Page: | 360 |
| Citation Issue: | 3-4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Volcanology and Geothermal Research |
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| Citation Number Of Pages: | 10 |
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| Citation Search Results Text: | Evolution of geothermal fluids deduced from chemistry plots: Yellowstone National Park (U.S.A.); 1982; Article; Journal; Journal of Volcanology and Geothermal Research; Mazor, E.; Thompson, J. M. |
| Citation Start Page: | 351 |
| Citation Volume: | 12 |
| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | Evolution of geothermal fluids deduced from chemistry plots: Yellowstone National Park (U.S.A.); 1982; Article; Journal; Journal of Volcanology and Geothermal Research; Mazor, E.; Thompson, J. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1982 00:00 -0600 |
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