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Summary A detailed local-scale monitoring network was used to assess CFC distribution in an unconfined sand aquifer in southwestern Ontario where the zone of 1–5-year-old groundwater was known with certainty because of prior use of a bromide tracer. Groundwater ⩽5 years old was confined to an aerobic zone at ⩽5 m depth and had CFC concentrations consistent with modern atmospheric mixing ratios at recharge temperatures of 7–11 °C, as was observed in the 3-m thick vadose zone at the site. At depths below 6 m, the groundwater became progressively more reducing, however, with a denitrifying horizon at 6–7 m depth, and a Mn and Fe reducing zone below 7 m depth. In the anaerobic zone, 3H/3He ratios indicated that groundwater-age...
A comprehensive geochemical survey of springs outside the northwest margin of the Yellowstone caldera was undertaken in 2003 and 2004. This survey was designed to detect: (1) active leakage from a huge reservoir of CO2 gas recently postulated to extend from beneath the caldera into this area; and (2) lingering evidence for subsurface flow of magmatic fluids into this area during the 1985 seismic swarm and concomitant caldera subsidence. Spring temperatures are low (< 15 °C), but two large-discharge springs contain 14C-dead carbon that can be identified as magmatic from calculated end-member values for δ13C(dead) and 3He/C(dead) of − 4‰ and 1 × 10− 10, respectively, similar to values for intra-caldera fumarolic and...
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Twenty-five ore and gangue mineral separates from the Miocene-age Goldfield and Tonopah epithermal Au-Ag deposits in southwestern Nevada were analyzed to determine the helium, neon, and argon (He, Ne, and Ar) isotopic compositions contained in fluid inclusions. Four mineral separates from the Butte Main Stage vein deposit and two from the Bingham pyrite-enargite vein deposits were also analyzed. Fifteen separates are from hand samples collected from underground mine workings and the remaining 16 are from mine tailings piles and pits excavated within the past 100 years. The separates consist dominantly of pyrite, enargite, and quartz, with lesser amounts of sphalerite, galena, potassium feldspar, bismuthinite, marcasite,...
Categories: Data; Tags: 3He/4He, Ar, Bingham Copper Mine, Bingham pyrite-enargite vein deposit, Butte Main Stage vein deposit, All tags...
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This data release contains the U.S. salient statistics and world production data extracted from the HELIUM data sheet of the USGS Mineral Commodity Summaries 2022.
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This data release contains the U.S. salient statistics and world production data extracted from the HELIUM data sheet of the USGS Mineral Commodity Summaries 2024.
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This data release contains the U.S. salient statistics and world production data extracted from the HELIUM data sheet of the USGS Mineral Commodity Summaries 2023.
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This location is part of the Arizona Mineral Industry Location System (AzMILS), an inventory of mineral occurences, prospects and mine locations in Arizona. Apache110B is located in T20N R26E Sec 23 NE in the Navajo South - 7.5 Min quad. This collection consists of various reports, maps, records and related materials acquired by the Arizona Department of Mines and Mineral Resources regarding mining properties in Arizona. Information was obtained by various means, including the property owners, exploration companies, consultants, verbal interviews, field visits, newspapers and publications. Some sections may be redacted for copyright. Please see the access statement.
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From the US Bureau of Mines map publication, "Availability of Federally Owned Minerals for Exploration and Development in the Western United States". The Bureau of Mines inventoried Federal mineral land in Wyoming and assessed the availability of this land for mineral exploration and development as affected by legal status and agency management practices. To illustrate the impact that various Federal land use decisions have on the mineral industry, the USBM also identified and ranked known mineral deposit areas (KMDAs)-i.e., areas having past or present mineral production and /or known mineral resources- and compared these areas spatially with availability of Federal mineral lands. Most Federal minerals, except...
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In response to Executive Order 13817 of December 20, 2017, the U.S. Geological Survey (USGS) coordinated with the Bureau of Land Management (BLM) to identify 35 nonfuel minerals or mineral materials considered critical to the economic and national security of the United States (U.S.) (https://pubs.usgs.gov/of/2018/1021/ofr20181021.pdf). Acquiring information on possible domestic sources of these critical minerals is the rationale for the USGS Earth Mapping Resources Initiative (Earth MRI). The program, which partners the USGS with State Geological Surveys, Federal agencies, and the private sector, aims to collect new geological, geophysical, and topographic (lidar) data in key areas of the U.S. to stimulate mineral...
Categories: Data; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags...
The mission of the USGS National Minerals Information Center (formerly the Minerals Information Team) is to collect, analyze, and disseminate information on the domestic and international supply of and demand for minerals and mineral materials essential to the U.S. economy and national security. About 90 mineral commodities are covered.The Center's goal is to provide decision makers with the information required to ensure that the Nation has an adequate and dependable supply of minerals and materials to meet its defense and economic needs at acceptable costs related to environment, energy, and economics. In addition to special data releases available through ScienceBase, annual and monthly or quarterly statistical...
Tags: NMIC, abrasives, alumina, aluminum, antimony, All tags...
A comprehensive geochemical survey of springs outside the northwest margin of the Yellowstone caldera was undertaken in 2003 and 2004. This survey was designed to detect: (1) active leakage from a huge reservoir of CO2 gas recently postulated to extend from beneath the caldera into this area; and (2) lingering evidence for subsurface flow of magmatic fluids into this area during the 1985 seismic swarm and concomitant caldera subsidence. Spring temperatures are low (< 15 °C), but two large-discharge springs contain 14C-dead carbon that can be identified as magmatic from calculated end-member values for δ13C(dead) and 3He/C(dead) of − 4‰ and 1 × 10− 10, respectively, similar to values for intra-caldera fumarolic and...
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This dataset provides national scale location information for known, publicly available, data on helium gas concentrations, reported in mol%. The dataset was created as part of the effort by the United States Geological Survey (USGS) to conduct an assessment of helium resources in accordance with the Helium Stewardship Act of 2013, Public Law 113-40. The data were collected from the USGS Energy Geochemistry Database, Bureau of Land Management (BLM) databases, State geological survey databases, and a thorough review of the published literature. This dataset represents an aggregation of multiple datasets into one unified, cohesive system that has a number of attributes for use in a resource assessment and for dissemination...
Categories: Data; Tags: Alabama, Alaska, Arizona, Arkansas, Boundaries, All tags...


    map background search result map search result map Potential Exploitable Helium Areas for Wyoming at 1:500,000 ADMMR mining collection file: Arizona Helium Fluid Inclusion Noble Gas Data from Goldfield and Tonopah Epithermal Au-Ag Deposits Dataset of Helium Concentrations in United States Wells OFR 32-89 - Automated Natural Gas and Crude Helium Measurement System. 1989. ADMMR mining collection file: Arizona Helium Potential Exploitable Helium Areas for Wyoming at 1:500,000 Fluid Inclusion Noble Gas Data from Goldfield and Tonopah Epithermal Au-Ag Deposits OFR 32-89 - Automated Natural Gas and Crude Helium Measurement System. 1989. Dataset of Helium Concentrations in United States Wells