Birkle, P. and Bundschuh, J. (2009) The abundance of natural arsenic in deep thermal fluids of geothermal and petroleum reservoirs in Mexico. In: Natural arsenic in groundwaters of Latin America. Arsenic in the Environment, 1. Taylor & Francis (CRC Press), London, United Kingdom, pp. 145-153. ISBN 9780415407717
Abstract
The lack of chemical similarity between thermal fluids in geothermal and petroleum reservoirs in Mexico indicates a distinct origin for arsenic (As) in both systems. Deep fluids from geothermal reservoirs along the Transmexican volcanic belt are characterized by elevated As concentrations, within an average range of 1 to 100 mg/l at a depth from 600 to 3000mb.s.l. The lack of correlation between As and salinity reflects the importance of secondary water-rock interaction processes. The predominance of As compared to Fe and Cu concentrations, and the abundance of secondary minerals in temperature-dependent hydrothermal zones, support this hypothesis. Oilfield waters from sedimentary basins in SE-Mexico show maximum As concentrations of 2 mg/l, at a
depth from 2900 to 6100 m b.s.l. The linear Cl−/As correlation for oilfield waters indicates that As
input occurs during the mixing between meteoric water and evaporated sea-water, and that there is only minor As derived from interaction with carbonate host rock.
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| Item Type: | Book Chapter (Commonwealth Reporting Category B) |
|---|---|
| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | Permanent restricted access to published version due to publisher copyright policy. |
| Faculty/School / Institute/Centre: | Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering |
| Date Deposited: | 05 Nov 2014 04:42 |
| Last Modified: | 12 Sep 2016 00:46 |
| Uncontrolled Keywords: | arsenic; geothermal resrvoirs; petroleum reservoirs; Mexico |
| Fields of Research : | 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment 04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040603 Hydrogeology |
| URI: | http://eprints.usq.edu.au/id/eprint/26260 |
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