Images

Conventional hydrothermal resources occur below the ground where three ingredients combine: heat, water and permeable rock. When heated water or steam is trapped in a porous rock below a layer of less permeable rock, a hydrothermal reservoir is formed.

Infographic of Electric-grade geothermal energy resources of the U.S. 

The USGS has assessed the Nation’s geothermal energy resources since the 1970s, updating assessments to include advancements in technology. An emerging resource is Enhanced Geothermal Systems (EGS).

Enhanced Geothermal Systems are an emerging resource that the USGS studies. To generate electricity from these systems, fractures are engineered into deep, low-porosity hot rocks to allow water to circulate. Then, the heated water is pumped back to the surface, where the thermal energy is used to move a turbine and generate electricity. 

Map of the Upper Peninsula of Michigan and nearby areas of Northern Wisconsin, with areas of overflights shaded in yellow (Wisconsin) and green (Michigan).

Mineral Commodities with Net Import Reliance on China

USGS collects the Nation’s data on the global production, supply, demand and trade of minerals to inform strategic policy, trade and land-use decisions.

This map shows the mineral systems map from the Earth Mapping Resources Initiative (Earth MRI). Through Earth MRI, USGS brings together federal and state experts to: 

Gallium is used in gallium arsenide and gallium nitride compound semiconductors. There is additional production capacity for gallium outside China with the potential to produce gallium in Germany, Kazakhstan and South Korea in response to China’s gallium export ban to the U.S. 

Each EDMAP proposal is categorized as either a "Field-Focused" of "Data Synthesis" project, but proposals may combine elements of both project types. Both types of EDMAP projects require a mentor-guided field experience and for each primary student mapper to produce their own first-author geologic map.

This infographic introduces an approach that could subsequently be used to prioritize environmental research for the full range of critical elements.

Our science is supporting the low-carbon energy transition.

The National Minerals Information Center:

Schematic diagram of water flow for conventional flotation processing of copper ores from Bleiwas, D.I., 2012, Estimated water requirements for the conventional flotation of copper ores: U.S. Geological Survey Open-File Report 2012–1089, 13 p., available at https://pubs.usgs.gov/publication/ofr20121089

Gif showing increases in Earth MRI mapping data from 2019-2024. You can find all Earth MRI data acquisitions here. 

Map showing Earth MRI data acquisitions from select years. See all acquisitions here. 

Earth MRI: The First Five Years

The Earth Mapping Resources Initiative (Earth MRI) is modernizing the Nation’s mapping and geoscience data, benefitting regions, states and local communities.

By the Numbers:

40 States and Territories partnered with Earth MRI

Map showing Earth MRI data acquisitions from select years. See all acquisitions here. 

Map showing Earth MRI data acquisitions from select years. See all acquisitions here. 

Mineral Supply Risk Analysis for the 2022 List of Critical Minerals

The USGS leads the government in developing the List of Critical Minerals, using a data-driven methodology to assess mineral supply risk.

Critical minerals are essential the Nation’s economy and security, and have supply chains vulnerable to disruption. 

Map showing the 23 mineral systems identified by the Mineral Resources Program and Earth Mapping Resources Initiative (Earth MRI)

Map showing Earth MRI data acquisitions from 2019-2021. See all acquisitions here. 

Map showing Earth MRI data acquisitions from select years. See all acquisitions here.