Mission Areas

Energy and Minerals

Mission Areas L2 Landing Page Tabs

Filter Total Items: 91
Assessment of undiscovered oil and gas resources of the Taoudeni Basin Province, Mali and Mauritania, 2015
Year Published: 2016

Assessment of undiscovered oil and gas resources of the Taoudeni Basin Province, Mali and Mauritania, 2015

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 160 million barrels of conventional oil, 1,880 billion cubic feet of conventional gas, 602 million barrels of shale oil, and 6,395 billion cubic feet of shale gas in the Taoudeni Basin Province in Mali and...

Brownfield, Michael E.; Schenk, Christopher J.; Klett, Timothy R.; Tennyson, Marilyn E.; Pitman, Janet K.; Gaswirth, Stephanie B.; Le, Phuong A.; Leathers-Miller, Heidi M.; Mercier, Tracey J.; Marra, Kristen R.; Hawkins, Sarah J.
Brownfield, M.E., Schenk, C.J., Klett, T.R., Tennyson, M.E., Pitman, J.K., Gaswirth, S.B., Le, P.A., Leathers-Miller, H.M., Mercier, T.J., Marra, K.R., and Hawkins, S.J., 2016, Assessment of undiscovered oil and gas resources of the Taoudeni Basin Province, Mali and Mauritania, 2015: U.S. Geological Survey Fact Sheet 2016-3003, 2 p., http://dx.doi.org/10.3133/fs20163003.
A process for reducing rocks and concentrating heavy minerals
Year Published: 2016

A process for reducing rocks and concentrating heavy minerals

To obtain minerals suitable for age-dating and other analyses, it is necessary to first reduce the mineral-bearing rock to a fine, sand-like consistency. Reducing whole rock requires crushing, grinding, and sieving. Ideally, the reduced material should range in size from 80- to 270-mesh (an opening between wires in a sieve). The openings in an 80-...

Strong, Thomas R.; Driscoll, Rhonda L.
Strong, T.R., and Driscoll, R.L., 2016, A process for reducing rocks and concentrating heavy minerals: U.S. Geological Survey Open-File Report 2016–1022, 16 p., http://dx.doi.org/10.3133/ofr20161022.
Critical elements in sediment-hosted deposits (clastic-dominated Zn-Pb-Ag, Mississippi Valley-type Zn-Pb, sedimentary rock-hosted Stratiform Cu, and carbonate-hosted Polymetallic Deposits): A review: Chapter 12
Year Published: 2016

Critical elements in sediment-hosted deposits (clastic-dominated Zn-Pb-Ag, Mississippi Valley-type Zn-Pb, sedimentary rock-hosted Stratiform Cu, and carbonate-hosted Polymetallic Deposits): A review: Chapter 12

Some sediment-hosted base metal deposits, specifically the clastic-dominated (CD) Zn-Pb deposits, carbonate-hosted Mississippi Valley-type (MVT) deposits, sedimentary-rock hosted stratiform copper deposits, and carbonate-hosted polymetallic (“Kipushi type”) deposits, are or have been important sources of critical elements including Co, Ga, Ge, and...

Marsh, Erin; Hitzman, Murray W.; Leach, David L.
Paleozoic magmatism and porphyry Cu-mineralization in an evolving tectonic setting in the North Qilian Orogenic Belt, NW China
Year Published: 2016

Paleozoic magmatism and porphyry Cu-mineralization in an evolving tectonic setting in the North Qilian Orogenic Belt, NW China

The NWW-striking North Qilian Orogenic Belt records the Paleozoic accretion–collision processes in NW China, and hosts Paleozoic Cu–Pb–Zn mineralization that was temporally and spatially related to the closure of the Paleo Qilian-Qinling Ocean. The Wangdian Cu deposit is located in the eastern part of the North Qilian Orogenic Belt, NW China...

Qiu, Kun-Feng; Deng, Jun; Taylor, Ryan D.; Song, Kai-Rui; Song, Yao-Hui; Li, Quan-Zhong; Goldfarb, Richard J.
Qiu, K.F., Deng, J., Taylor, R.D., Song, K.R., Song, Y.H., Li, Q.Z., and Goldfarb, R.J., 2016, Paleozoic magmatism and porphyry Cu-mineralization in an evolving tectonic setting in the North Qilian orogenic belt, NW China: Journal of Asian Earth Sciences, v. 122, p. 20-40.
Thorium as a nuclear fuel: Chapter 10
Year Published: 2016

Thorium as a nuclear fuel: Chapter 10

No abstract available.

Van Gosen, Bradley S.; Tulsidas, Harikrishnan
Wetting and drying of soil in response to precipitation: Data analysis, modeling, and forecasting
Year Published: 2016

Wetting and drying of soil in response to precipitation: Data analysis, modeling, and forecasting

This paper investigates methods to analyze and forecast soil moisture time series. We extend an existing Antecedent Water Index (AWI) model, which expresses soil moisture as a function of time and rainfall. Unfortunately, the existing AWI model does not forecast effectively for time periods beyond a few hours. To overcome this limitation, we...

Basak, Aniruddha; Kulkarni, Chinmay; Schmidt, Kevin M.; Mengshoel, Ole
A salt diapir-related Mississippi Valley-type deposit: The Bou Jaber Pb-Zn-Ba-F deposit, Tunisia: Fluid inclusion and isotope study
Year Published: 2016

A salt diapir-related Mississippi Valley-type deposit: The Bou Jaber Pb-Zn-Ba-F deposit, Tunisia: Fluid inclusion and isotope study

The Bou Jaber Ba-F-Pb-Zn deposit is located at the edge of the Bou Jaber Triassic salt diapir in the Tunisia Salt Diapir Province. The ores are unconformity and fault-controlled and occur as subvertical column-shaped bodies developed in dissolution-collapse breccias and in cavities within the Late Aptian platform carbonate rocks, which are covered...

Bouhlel, Salah; Leach, David; Johnson, Craig A.; Marsh, Erin; Salmi-Laouar, Sihem; Banks, David A.
Paleomagnetic record determined in cores from deep research wells in the Quaternary Santa Clara basin, California
Year Published: 2016

Paleomagnetic record determined in cores from deep research wells in the Quaternary Santa Clara basin, California

Paleomagnetic study of cores from six deep wells provides an independent temporal framework for much of the alluvial stratigraphy of the Quaternary basin beneath the Santa Clara Valley. This stratigraphy consists of 8 upward-fining cycles in the upper 300 m of section and an underlying 150 m or more of largely fine-grained sediment. The eight...

Mankinen, Edward A.; Wentworth, Carl M.
Engagement with indigenous peoples and honoring traditional knowledge systems
Year Published: 2016

Engagement with indigenous peoples and honoring traditional knowledge systems

The organizers of the 2014 US National Climate Assessment (NCA) made a concerted effort to reach out to and collaborate with Indigenous peoples, resulting in the most comprehensive information to date on climate change impacts to Indigenous peoples in a US national assessment. Yet, there is still much room for improvement in assessment processes...

Maldonado, Julie; Bennett, Bull; Chief, Karletta; Cochran, Patricia; Cozetto, Karen; Gough, Bob; Hiza, Margaret M.; Lynn, Kathy; Maynard, Nancy; Voggesser, Garrit
Two Holocene paleofire records from Peten, Guatemala: Implications for natural fire regime and prehispanic Maya land use
Year Published: 2016

Two Holocene paleofire records from Peten, Guatemala: Implications for natural fire regime and prehispanic Maya land use

Although fire was arguably the primary tool used by the Maya to alter the landscape and extract resources, little attention has been paid to biomass burning in paleoenvironmental reconstructions from the Maya lowlands. Here we report two new well-dated, high-resolution records of biomass burning based on analysis of macroscopic fossil charcoal...

Anderson, Lysanna; Wahl, David B.
Arctic Alaska’s Lower Cretaceous (Hauterivian and Barremian) mudstone succession - Linking lithofacies, texture, and geochemistry to marine processes: Chapter B in Studies by the U.S. Geological Survey in Alaska, vol. 15
Year Published: 2015

Arctic Alaska’s Lower Cretaceous (Hauterivian and Barremian) mudstone succession - Linking lithofacies, texture, and geochemistry to marine processes: Chapter B in Studies by the U.S. Geological Survey in Alaska, vol. 15

We present new images and descriptions of the lithofacies and organic facies of the pebble shale unit and lower part of the Hue Shale (Lower Cretaceous) of Arctic Alaska at a high magnification that illustrates their textural characteristics. Our aims were to describe and determine the distribution of facies in these petroleum source rocks and to...

Keller, Margaret A.; Macquaker, Joe H.S.
Keller, M.A., and Macquaker, J.H.S., 2015, Arctic Alaska’s Lower Cretaceous (Hauterivian and Barremian) mudstone succession—Linking lithofacies, texture, and geochemistry to marine processes, in Dumoulin, J.A., ed., Studies by the U.S. Geological Survey in Alaska, vol. 15: U.S. Geological Survey Professional Paper 1814–B, 35 p., http://dx.doi.org/10.3133/pp1814B.
Filter Total Items: 75
Graph: Annual mine production of tantalum contained in mined concentrates
December 10, 2015

Reston, VA— The United States is completely reliant on imports of tantalum, which is a commonly used element in electronics, to meet its domestic consumption for economic and national security needs. A new U.S. Geological Survey report illustrates the dramatic change of the international sources of primary mined tantalum over the past 15 years.

Map: Area of Uranium Assessment in Texas
December 2, 2015

The uranium oxide is located in sandstone formations throughout the South Texas Coastal Plain, which borders the Gulf of Mexico. The area has long been known to contain uranium, and two mines are currently in operation, with a number of companies actively exploring for uranium.

Map of Undiscovered Cooper Estimate in the Middle East
November 18, 2015

More than 180 million metric tons of undiscovered copper resources may be found in an area of the Middle East that covers Turkey, Georgia, Armenia, Azerbaijan, Iran, western Pakistan and southwestern Afghanistan, according to a recent assessment by the U.S. Geological Survey.

USGS science for a changing world logo
November 3, 2015

On average, streams in the Niobrara-Mowry Play of eastern Wyoming, Fayetteville Play of Arkansas, and Barnett Play of Texas ranked most vulnerable to unconventional oil and gas development, but for different reasons, according to recent U.S. Geological Survey coauthored research.

USGS science for a changing world logo
October 14, 2015

Many grassland bird species in the Bakken shale region, including some seriously declining populations, are displaced from their habitats as a result of oil and gas development, according to new U.S. Geological Survey research.

Aerial view of the Grabens, Canyonlands National Park
October 12, 2015

A graben is a piece of Earth’s crust that is shifted downward in comparison to adjacent crust known as “horsts,” which are shifted upward.

Map of San Joaquin Basin Province
October 6, 2015

The Monterey Formation in the deepest parts of California’s San Joaquin Basin contains an estimated mean volumes of 21 million barrels of oil, 27 billion cubic feet of gas, and 1 million barrels of natural gas liquids, according to the first USGS assessment of continuous (unconventional), technically recoverable resources in the Monterey Formation.

An image of calcite.
September 21, 2015

The process in which magnesium is removed from the mineral dolomite (calcium magnesium carbonate) leaving behind the minerals calcite (calcium carbonate) and periclase (magnesium oxide.)

Image: Moon over Half Dome
September 7, 2015

Despite sounding like something out of Harry Potter, a batholith is a type of igneous rock that forms when magma rises into the earth’s crust, but does not erupt onto the surface. The magma cools beneath the earth’s surface, forming a rock structure that extends at least one hundred square kilometers across (40 square miles), and extends to an unknown depth.

Side by side comparison of a malformed and normal chitinozoan specimen
August 31, 2015

Toxic metals such as iron, lead and arsenic may have helped cause mass extinctions in the world’s oceans millions of years ago, according to recent research from the U.S. Geological Survey, the National Center for Scientific Research, France; and Ghent University, Belgium.

The USGS streamgage on Cement Creek at Silverton, Colorado, measures continuous stream stage and discharge. Cement Creek is part
August 20, 2015

On August 5, while investigating the Gold King Mine in southwestern Colorado, the U.S Environmental Protection Agency accidentally triggered the release of approximately three million gallons of acidic, metal-rich mine wastewater from the Gold King Mine into Cement Creek, a tributary of the Animas River.

collage of scientists conducting science related to each mission are
August 10, 2015

ANCHORAGE, Alaska — In the 20th century, Baranof Island in Southeastern Alaska has drawn attention for its gold, chrome and nickel deposits, timber industry, potential activity of the dormant Mount Edgecumbe volcano, and for numerous commercially developed hot springs.