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Silica ‘chimneys’ related to paleo-brine discharge from the Williston Basin |
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| Authors: | Stephen E. Grasby Ruth Bezys Kathleen L. Londry |
| Affiliation: | aGeological Survey of Canada, 3303 33rd Street NW, Calgary, AB, Canada;bManitoba Industry, Economic Development and Mines, 360-1395 Ellice Avenue Winnipeg, Manitoba, Canada R3G 3P2;cDepartment of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2 |
| Abstract: | Siliceous ‘solution chimneys’are described from a region unaffected by volcanism or high temperature fluid flow. The features are interpreted as low temperature dissolution/replacement structures formed in Paleozoic carbonates. The features are thought to be paleo-brine spring discharge sites similar to modern springs found within the same area which host a mid-continent marine ecosystem. Geochemical modeling shows mixing of spring waters with shallow groundwater could generate conditions of undersaturation with respect to calcite and silica oversaturation. |
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