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Publications

Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center

Filter Total Items: 2495

Extensional faulting in the southern Klamath Mountains, California Extensional faulting in the southern Klamath Mountains, California

Large northeast striking normal faults in the southern Klamath Mountains may indicate that substantial crustal extension occurred during Tertiary time. Some of these faults form grabens in the Jurassic and older bedrock of the province. The grabens contain continental Oligocene or Miocene deposits (Weaverville Formation), and in two of them the Oligocene or Miocene is underlain by Lower
Authors
R.A. Schweickert, W. P. Irwin

The crustal structure of the Wrangellia Terrane along the East Glenn Highway, eastern‐southern Alaska The crustal structure of the Wrangellia Terrane along the East Glenn Highway, eastern‐southern Alaska

Recently acquired seismic refraction data from eastern‐southern Alaska provide new information on the structure and composition of the Wrangellia and adjacent terranes. The data comprise a 160‐km‐long refraction profile along the East Glenn (Tok‐Cutoff) Highway that was collected as part of the U.S. Geological Survey's multidisciplinary Trans‐Alaska Crustal Transect program. The upper 3...
Authors
E.B. Goodwin, Gary S. Fuis, Warren J. Nokleberg, E. L. Ambos

Hydrothermal discharge zones beneath massive sulfide deposits mapped in the Oman ophiolite Hydrothermal discharge zones beneath massive sulfide deposits mapped in the Oman ophiolite

The area in the Oman ophiolite containing the volcanic-hosted Bayda and Aarja massive sulfide deposits exposes a cross section of ocean crust and reveals to an unprecedented extent the fossil zones of hydrothermal upwelling that fed these sea-floor deposits. The fossil discharge zones are elongate areas of alteration and mineralization characterized by numerous small (metres to tens of...
Authors
R.M. Haymon, Randolph A. Koski, M. J. Abrams

Geochemistry and occurrence of selenium: An overview Geochemistry and occurrence of selenium: An overview

Selenium (Se) is both beneficial and toxic to animals, plants, and humans. Consequently, it is imperative to know its concentration in the environment and to understand the processes controlling its distribution. Determinations of Se concentrations in a variety of materials indicate that Se is widely distributed throughout the environment. The processes responsible for its distribution...
Authors
James M. McNeal, Laurie S. Balistrieri
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