| Abstract: | A graphical method is described for identifying geochemical reactions needed in the interpretation of radiocarbon age in groundwater systems. Graphs are constructed by plotting the measured 14C, δ13C, and concentration of dissolved inorganic carbon and are interpreted according to specific criteria to recognize water samples that are consistent with a wide range of processes, including geochemical reactions, carbon isotopic exchange, 14C decay, and mixing of waters. The graphs are used to provide a qualitative estimate of radiocarbon age, to deduce the hydrochemical complexity of a groundwater system, and to compare samples from different groundwater systems. Graphs of chemical and isotopic data from a series of previously-published groundwater studies are used to demonstrate the utility of the approach. Ultimately, the information derived from the graphs is used to improve geochemical models for adjustment of radiocarbon ages in groundwater systems. |
| Genre: | Article |
| ProdID: | 70043331 |
| Citation Author: | Han, Liang-Feng ; Plummer, L. Niel; Aggarwal, Pradeep |
| Citation Contributing Office: | Branch of Regional Research Eastern Region |
| Citation Datum: | |
| Citation Day: | 15 |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 112 |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Chemical Geology |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | JUL |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 25 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Elseveir |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | A graphical method to evaluate predominant geochemical processes occurring in groundwater systems for radiocarbon dating; 2012; Article; Journal; Chemical Geology; Han, Liang-Feng ; Plummer, L. Niel; Aggarwal, Pradeep |
| Citation Start Page: | 88 |
| Citation Volume: | 318-319 |
| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | A graphical method to evaluate predominant geochemical processes occurring in groundwater systems for radiocarbon dating; 2012; Article; Journal; Chemical Geology; Han, Liang-Feng ; Plummer, L. Niel; Aggarwal, Pradeep |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.chemgeo.2012.05.004 |
| Date Other: | Tue, 1 Jan 2013 00:00 -0600 |
| Publisher: | Elseveir |
