33 research outputs found
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EOR Potential from CO2 Captured from Coal-Fired Power Plants in the Upper Cretaceous (Cenomanian) Woodbine Group, East Texas Basin, and Southeastern Texas Gulf Coast, USA
Bureau of Economic Geolog
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Geologic and economic criteria for siting clean-coal facilities in the Texas Gulf Coast, USA
Bureau of Economic Geolog
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Quick-look assessments to identify optimal CO2 EOR storage sites
Bureau of Economic Geolog
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Geologic factors controlling CO2 storage capacity and permanence: case studies based on experience with heterogeneity in oil and gas reservoirs applied to CO2 storage
Bureau of Economic Geolog
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Geologic and infrastructure factors for delineating areas for clean coal: examples in Texas, USA
Bureau of Economic Geolog
Reorganization of a deeply incised drainage: role of deformation, sedimentation and groundwater flow
Deeply incised drainage networks are thought to be robust and not easily
modified, and are commonly used as passive markers of horizontal strain.
Yet, reorganizations (rearrangements) appear in the geologic record. We
provide field evidence of the reorganization of a Miocene drainage
network in response to strike-slip and vertical displacements in
Guatemala. The drainage was deeply incised into a 50-km-wide orogen
located along the North America-Caribbean plate boundary. It rearranged
twice, first during the Late Miocene in response to transpressional
uplift along the Polochic fault, and again in the Quaternary in response
to transtensional uplift along secondary faults. The pattern of
reorganization resembles that produced by the tectonic defeat of rivers
that cross growing tectonic structures. Compilation of remote sensing
data, field mapping, sediment provenance study, grain-size analysis and
Ar(40)/Ar(39) dating from paleovalleys and their fill reveals that the
classic mechanisms of river diversion, such as river avulsion over
bedrock, or capture driven by surface runoff, are not sufficient to
produce the observed diversions. The sites of diversion coincide
spatially with limestone belts and reactivated fault zones, suggesting
that solution-triggered or deformation-triggered permeability have
helped breaching of interfluves. The diversions are also related
temporally and spatially to the accumulation of sediment fills in the
valleys, upstream of the rising structures. We infer that the breaching
of the interfluves was achieved by headward erosion along tributaries
fed by groundwater flow tracking from the valleys soon to be captured.
Fault zones and limestone belts provided the pathways, and the aquifers
occupying the valley fills provided the head pressure that enhanced
groundwater circulation. The defeat of rivers crossing the rising
structures results essentially from the tectonically enhanced activation
of groundwater flow between catchments