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Understanding processes affecting mineral deposits in humid environments

May 10, 2011

Recent interdisciplinary studies by the U.S. Geological Survey have resulted in substantial progress toward understanding the influence that climate and hydrology have on the geochemical signatures of mineral deposits and the resulting mine wastes in the eastern United States. Specific areas of focus include the release, transport, and fate of acid, metals, and associated elements from inactive mines in temperate coastal areas and of metals from unmined mineral deposits in tropical to subtropical areas; the influence of climate, geology, and hydrology on remediation options for abandoned mines; and the application of radiogenic isotopes to uniquely apportion source contributions that distinguish natural from mining sources and extent of metal transport.

The environmental effects of abandoned mines and unmined mineral deposits result from a complex interaction of a variety of chemical and physical factors. These include the geology of the mineral deposit, the hydrologic setting of the mineral deposit and associated mine wastes, the chemistry of waters interacting with the deposit and associated waste material, the engineering of a mine as it relates to the reactivity of mine wastes, and climate, which affects such factors as temperature and the amounts of precipitation and evapotranspiration; these factors, in turn, influence the environmental behavior of mineral deposits. The role of climate is becoming increasingly important in environmental investigations of mineral deposits because of the growing concerns about climate change.

Publication Year 2011
Title Understanding processes affecting mineral deposits in humid environments
DOI 10.3133/fs20103105
Authors Robert R. Seal, Robert A. Ayuso
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Fact Sheet
Series Number 2010-3105
Index ID fs20103105
Record Source USGS Publications Warehouse
USGS Organization Eastern Mineral and Environmental Resources Science Center; U.S. Geological Survey