| Abstract: | Regional dedolomitization is the major process that controls the chemical character of water in the Mississippian Pahasapa Limestone (Madison equivalent) surrounding the Black Hills, South Dakota and Wyoming. The process of dedolomitization consists of dolomite dissolution and concurrent precipitation of calcite; it is driven by dissolution of gypsum. Deuterium and oxygen isotopic data from the ground water, coupled with regional potentiometric maps, show that recharge occurs on the western slope of the Black Hills and that the water flows N and W toward the Powder River Basin. Mass-balance and mass-transfer calculations were used to adjust 14C values to determine a range of groundwater flow velocities between 2 and 20 m/yr. The close agreement among the model results demonstrates that dedolomitization is controlling water-rock interactions in this regional carbonate aquifer system.-from Authors |
| Genre: | Article |
| ProdID: | 70011297 |
| Citation Author: | Back, W.; Hanshaw, B. B.; Plummer, L. N.; Rahn, P. H.; Rightmire, C. T.; Rubin, M. |
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| Citation End Page: | 1429 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
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| Citation Number Of Pages: | 15 |
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| Citation Search Results Text: | Process and rate of dedolomitization: mass transfer and C14 dating in a regional carbonate aquifer.; 1983; Article; Journal; Geological Society of America Bulletin; Back, W.; Hanshaw, B. B.; Plummer, L. N.; Rahn, P. H.; Rightmire, C. T.; Rubin, M. |
| Citation Start Page: | 1415 |
| Citation Volume: | 94 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | Process and rate of dedolomitization: mass transfer and C14 dating in a regional carbonate aquifer.; 1983; Article; Journal; Geological Society of America Bulletin; Back, W.; Hanshaw, B. B.; Plummer, L. N.; Rahn, P. H.; Rightmire, C. T.; Rubin, M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1983 00:00 -0600 |
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