Research Geologist
Email:
rseal@usgs.gov
Office Phone:
703-648-6290
Fax:
703-648-6383
ORCID:
0000-0003-0901-2529
Location
12201 Sunrise Valley Drive
Reston
, VA
20192-0002
US
|
Germanium (Ge) is an increasingly important element used in critical technologies for communication, defense, and computing. However, Ge is scarce, and there is no United States (U.S.) primary production. Additionally, the environmental behavior of Ge is poorly understood. Germanium does not generally form its own minerals, but is instead recovered as a byproduct of zinc mining or of coal fly ash. It has been deemed critical by the U.S. and globally, and investigations of its geologic concentration, environmental fate and transport, and potential for recovery are crucial for maintaining a sustainable supply. A relevant study site to explore questions of environmental behavior and the potential to recover...
|
These data represent the air-free pH and specific conductance per pore volume of effluent generated by the phosphate removal column experiment. Solid samples used for the columns are of modern and legacy iron and steel slag from the Chicago-Gary area of Illinois and Indiana, USA.
Categories: Data;
Tags: Chicago,
Cook County,
Gary,
Illinois,
Indiana, All tags...
Indiana Harbor,
Lake County,
Water pH,
geochemistry,
water temperature, Fewer tags
|
These data include geochemical analyses of rock, mine waste, and water samples collected from the Balkhab copper deposit, Sar-e Pol Province, Afghanistan in 2020.
|
The Ironwood Iron-Formation, part of the Gogebic Iron Range in Wisconsin, is a Paleoproterozoic Superior-type banded iron formation (BIF) with substantial iron resource potential. The development of a Mesoproterozoic contact metamorphic aureole related to the emplacement of the Mellen Intrusive Complex resulted in the production of a variety of silicate minerals in the western portion of the Ironwood Iron-Formation, including amphibole, pyroxene, and olivine. The presence of amphibole minerals, some of which occur in a fibrous habit, has complicated development of this resource due to potential human health impacts. This data release provides information related to amphibole and other minerals in order that commercial,...
|
These data represent the major, minor, and trace element compositions of effluent water samples generated by column experiments of modern and legacy iron and steel slag from the Chicago-Gary area of Illinois and Indiana. Details of the column experiments may be reviewed in the journal article listed in the cross-reference section of this data release titled, "Geochemical Characterization of Iron and Steel Slag and Its Potential to Remove Phosphate and Neutralize Acid".
Categories: Data;
Tags: Chicago,
Cook County,
Gary,
Illinois,
Indiana, All tags...
Indiana Harbor,
Lake County,
atomic emission spectroscopy,
chemical analysis,
geochemistry,
mass spectroscopy, Fewer tags
|
View more...
|