The Influence of Groundwater Flowpaths, Nutrients, and Redox Conditions on the Extent of Microbial Methanogenesis in Coal Beds Using Solute and Isotope Chemistry: Powder River Basin, USA

Persistent Link:
http://hdl.handle.net/10150/193411
Title:
The Influence of Groundwater Flowpaths, Nutrients, and Redox Conditions on the Extent of Microbial Methanogenesis in Coal Beds Using Solute and Isotope Chemistry: Powder River Basin, USA
Author:
Bates, Brittney Lynette
Issue Date:
2010
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Water and gas samples were collected from coalbed methane wells and surface coal mines in the Powder River Basin and analyzed for solute chemistry, isotopes, and gas composition to determine timing and source of recharge, nutrient influxes, extent of methanogenesis, and redox conditions. Delta18O-H2O values and hydraulic gradients show recharge to coal beds is principally from the southern basin margin with inputs from the western and eastern margins. Detectable 14C in coal waters indicates they were recharged <50,000 BP. Correlation of deltaD-CH4 and deltaD-H2O values suggests that methane has accumulated since the Late Pleistocene. Nutrient concentrations were low and did not correlate to groundwater recharge sources. Coal gases from the northwestern basin are isotopically-depleted suggesting 'early stage' methanogenesis, whereas coal gases from the central southeastern basin are isotopically-enriched suggesting 'late stage' methanogenesis. Several wells have elevated SO4 and oxygen, which may be due to recent hydrologic changes from groundwater pumping.
Type:
text; Electronic Thesis
Keywords:
coal; groundwater; hydrology; isotope; methane; Powder River Basin
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology; Graduate College
Degree Grantor:
University of Arizona
Advisor:
McIntosh, Jennifer C.
Committee Chair:
McIntosh, Jennifer C.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleThe Influence of Groundwater Flowpaths, Nutrients, and Redox Conditions on the Extent of Microbial Methanogenesis in Coal Beds Using Solute and Isotope Chemistry: Powder River Basin, USAen_US
dc.creatorBates, Brittney Lynetteen_US
dc.contributor.authorBates, Brittney Lynetteen_US
dc.date.issued2010en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractWater and gas samples were collected from coalbed methane wells and surface coal mines in the Powder River Basin and analyzed for solute chemistry, isotopes, and gas composition to determine timing and source of recharge, nutrient influxes, extent of methanogenesis, and redox conditions. Delta18O-H2O values and hydraulic gradients show recharge to coal beds is principally from the southern basin margin with inputs from the western and eastern margins. Detectable 14C in coal waters indicates they were recharged <50,000 BP. Correlation of deltaD-CH4 and deltaD-H2O values suggests that methane has accumulated since the Late Pleistocene. Nutrient concentrations were low and did not correlate to groundwater recharge sources. Coal gases from the northwestern basin are isotopically-depleted suggesting 'early stage' methanogenesis, whereas coal gases from the central southeastern basin are isotopically-enriched suggesting 'late stage' methanogenesis. Several wells have elevated SO4 and oxygen, which may be due to recent hydrologic changes from groundwater pumping.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectcoalen_US
dc.subjectgroundwateren_US
dc.subjecthydrologyen_US
dc.subjectisotopeen_US
dc.subjectmethaneen_US
dc.subjectPowder River Basinen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMcIntosh, Jennifer C.en_US
dc.contributor.chairMcIntosh, Jennifer C.en_US
dc.contributor.committeememberLohse, Kathleenen_US
dc.contributor.committeememberBrooks, Paul Den_US
dc.identifier.proquest10881en_US
dc.identifier.oclc752260961en_US
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