Publications
Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.
Filter Total Items: 2018
Porphyry Cu indicator minerals in till as an exploration tool: Example from the giant Pebble porphyry Cu-Au-Mo deposit, Alaska, USA Porphyry Cu indicator minerals in till as an exploration tool: Example from the giant Pebble porphyry Cu-Au-Mo deposit, Alaska, USA
Porphyry Cu indicator minerals are mineral species in clastic sediments that indicate the presence of mineralization and hydrothermal alteration associated with porphyry Cu and associated skarn deposits. Porphyry Cu indicator minerals recovered from shallow till samples near the giant Pebble Cu-Au-Mo porphyry deposit in SW Alaska, USA, include apatite, andradite garnet, Mn-epidote...
Authors
Karen D. Kelley, Robert G. Eppinger, J. Lang, Steven M. Smith, David L. Fey
P is for pit P is for pit
A gravel pit that was a source of happy childhood memories showcases the evolution of mining technology.
Authors
W. H. Langer
S is for sunset crater S is for sunset crater
A scenic trek always includes an interesting landmark - a volcanic cinder cone.
Authors
W. H. Langer
R is for rocksicle R is for rocksicle
A Front Range perspective on managing and shipping aggregates.
Authors
W. H. Langer
Q is for quartz Q is for quartz
This versatile mineral has been used in everything from ceremonial rattles to sonar transducers to quartz watches.
Authors
W. H. Langer
O is for obsidian O is for obsidian
Although a relative youngster in geologic terms, obsidian can change over time from glass to mineral.
Authors
W. H. Langer
Young (<7 Ma) gold deposits and active geothermal systems of the Great Basin: Enigmas, questions, and exploration potential Young (<7 Ma) gold deposits and active geothermal systems of the Great Basin: Enigmas, questions, and exploration potential
Young gold systems in the Great Basin (£ 7 Ma), though not as well studied as their older counterparts, comprise a rapidly growing and in some ways controversial group. The gold inventory for these systems has more than doubled in the last 5 years from roughly 370 tonnes (12 Moz) to 890 tonnes (29 Moz). Although these deposits are characterized by low grades, tonnages can be high and...
Authors
Mark F. Coolbaugh, Peter G. Vikre, James E. Faulds
And last comes XYZ And last comes XYZ
Catesian Coordinates can be used to specify the position of any point in three-dimensional space by measuring its distances from three mutually perpendicular planes.
Authors
Bill Langer
Monitoring soil geochemistry in the urban environment: A comparison of studies in 1972 and 2005 in Denver, Colorado Monitoring soil geochemistry in the urban environment: A comparison of studies in 1972 and 2005 in Denver, Colorado
No abstract available
Authors
David B. Smith, Karl J. Ellefsen, Ronald G. Garrett, L. Graham Closs
The ShakeOut Scenario: Meeting the needs for construction aggregates, hot mix asphalt, and ready mix concrete The ShakeOut Scenario: Meeting the needs for construction aggregates, hot mix asphalt, and ready mix concrete
An Mw 7.8 earthquake as described in the ShakeOut Scenario would cause significant damage to buildings and infrastructure. Over 6 million tons of newly mined aggregate would be used for emergency repairs and for reconstruction in the five years following the event. This aggregate would be applied mostly in the form of concrete for buildings and bridges, asphalt or concrete for pavement...
Authors
William H. Langer
Mountain-block recharge, present and past, in the eastern Espanola Basin, New Mexico, USA Mountain-block recharge, present and past, in the eastern Espanola Basin, New Mexico, USA
Noble gas recharge temperatures (NGTs) and radiocarbon ages were determined for 43 groundwater samples collected in the eastern Española Basin, New Mexico (USA), to identify mountain-block recharge in waters
Authors
Andrew H. Manning