Eastern Mineral and Environmental Resources Science Center
1. Geochemistry of Aluminum in Surficial Environments:
The objective of this task is to develop new approaches for tracing and modeling
near-surface processes that affect mineral deposits in humid enveronments through
the study of minerals, mineral surfaces, and related substrate material. Atomic
force microscopy and multi-gas BET surface area analysis will be used to complement
existing techniques. The stoichiometries and pathways of weathering reactions
and reaction mechanisms for aluminous minerals will be studied to provide needed
quantification to rate-controlled processes that result in elemental mobility
in silicate-dominated rocks in humid environments. Solid solutions in processes
will be studied to develop an understanding of (solid and liquid) solution effects
on thermodynamic parameters for these systems. The task will integrate field
and laboratory studies of previously well-characterized surficial environments
to identify selected minerals that can be used to effectively track reaction
pathways for metals and other pollutants in low temperature environments.
2. Geoenvironmental Studies of Mineral Deposits in Humid
Coastal Settings:
The main objectives of interest include the discovery of metal sources and
establishing an inventory of metal distribution:
4. Science in Support of Mitigation and Remediation:
The sustainable development of mineral resources and the remediation of the environmental
legacy of historic mining requires a thorough and predictive understanding of
the physical and geochemical processes that affect mineral deposits and their
waste products under a variety of climatic settings. The behavior of contaminants
is is dictated by complex combinations of these processes. The interplay among
these processes forms the basis of natural attenuation of contamination nd of
remediation of mine sites, but is poorly understood. This task aims to better
understand the geochemical details of processes such as:
5. Geoenvironmental Studies of Mineral Deposits in Tropical
Settings:
The objectives of this task center around investigating geochemical processes associated with the weathering of mineral deposits and their wastes in humid tropical climatic settings, which are characteristic of the eastern United States. The research will be conducted as in Task 4 above. Likely deposit types to be studied include porphyry copper deposits and high-sulfidation epithermal deposits.
6. Tracking geologic sources of trace elements in mineral deposits formed
in sedimentary basins:
In this task we will study, at various scales,
the interaction of fluids, metal sources, and processes that lead to the generation
of metalliferous organic environments in selected sedimentary basins representing
a transect across metamorphic grade, and including an examination of pristine
modern sedimentary environments. Studies will focus on the effects of metamorphism
and the changing mineralogical framework hosting the toxic metals, and on the
effects of prograde and retrograde metamorphic and surficial weathering processes
on felsic schistose rocks that result in mobilization of toxic metals and their
availability in the near-surface environment.
Mineral Resources | Eastern / Central / Western / Alaska / National Minerals Information |
Crustal Imaging & Characterization / Spatial Data |