Using Large Databases of Groundwater Chemistry in the Northern Midwest USA: The Effects of Geologic and Anthropogenic Factors

详细信息    查看全文

• 作者：R.B. Wanty^a ; ^{rwanty@usgs.gov} ; A.H. Manning^a ; M.R. Johnson^a ; S.J. Kalkhoff^b ; J.D. Garrett^b ; J.M. Morrison^a ; S. DaPelo^c ; J.L. Mauk^a
• 关键词：Midcontinent rift ; data mining ; groundwater chemistry ; lithology
• 刊名：Procedia Earth and Planetary Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：17
• 期：Complete
• 页码：806-809
• 全文大小：459 K
• 卷排序：17

文摘

Regional geochemical databases for the northern Midwest USA are being compiled to examine the various geogenic and anthropogenic factors that control the chemistry of groundwater. At the regional scale, variations are seen that are attributable to agricultural and urban effects, or to geologic factors. Examples of the former include enrichments of nitrate in groundwater, while examples of the latter mainly highlight geochemical differences between carbonate rocks and all other rock types in the region. This paper examines a few of these regional effects and the spatial scales at which they can be observed.