Nevada Test Site field trip guidebook 1984
Technical Report
·
OSTI ID:5563646
- comps.
The Nevada Test Site (NTS), located in southern Nevada, was established in 1950 as an area for testing nuclear devices. Various geologic studies performed in conjunction with these activities as well as recent work on a proposed radioactive waste repository are reported in detail in this guidebook and include studies on the structure, stratigraphy, geochemistry, and physical properties of the rocks at NTS. The oldest sequence of rocks exposed in the NTS region is comprised of late Precambrian to Permian miogeoclinal rocks which were subsequently deformed during Jura-Cretaceous contraction, probably related to the Sevier orogeny. These rocks were then locally intruded by late Mesozoic (approx.93 m.y.BP) plutonic rocks related to the Sierra Nevada batholith. Voluminous calcalkaline ash-flow tuffs and associated volcanic rocks originating from the Timber Mountain-Oasis Valley caldera complex were extruded over much of NTS and adjacent areas from approx.16 to 10 m.y.BP. Peralkaline rocks intercalated in the volcanic sequence issued from both Silent Canyon (15 to 13 m.y.BP) and Black Mountain (9 to 7 m.y.BP) volcanic centers. The youngest igneous rocks at NTS are composed of basaltic rocks, primarily hawaiite, the older of which are associated with the evolving silicic volcanic centers and the younger associated with Cenozoic regional extension. Late Tertiary to Recent alluvium derived from the ranges form large, coalescing fans which fill the basins with sediments and reach thicknesses of over 1 km. 45 refs., 21 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5563646
- Report Number(s):
- LA-10428-MS; ON: DE85015362
- Country of Publication:
- United States
- Language:
- English
Similar Records
Major-element geochemistry of the Silent Canyon--Black Mountain peralkaline volcanic centers, northwestern Nevada Test Site: applications to an assessment of renewed volcanism
Chemical and mineralogic trends within the Timber Mountain--Oasis Valley caldera complex, Nevada: Evidence for Multiple cycles of chemical evolution in a long-lived silicic magma system
Geophysical interpretations west of and within the northwestern part of the Nevada Test Site
Technical Report
·
Sun Dec 30 23:00:00 EST 1979
·
OSTI ID:59609
Chemical and mineralogic trends within the Timber Mountain--Oasis Valley caldera complex, Nevada: Evidence for Multiple cycles of chemical evolution in a long-lived silicic magma system
Journal Article
·
Wed May 10 00:00:00 EDT 1989
· J. Geophys. Res.; (United States)
·
OSTI ID:6142520
Geophysical interpretations west of and within the northwestern part of the Nevada Test Site
Technical Report
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:650211
Related Subjects
58 GEOSCIENCES
580100* -- Geology & Hydrology-- (-1989)
580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989)
CHEMISTRY
GEOCHEMISTRY
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
NATIONAL ORGANIZATIONS
NEVADA TEST SITE
ROCKS
STRATIGRAPHY
TECTONICS
US DOE
US ORGANIZATIONS
VOLCANIC ROCKS
VOLCANISM
580100* -- Geology & Hydrology-- (-1989)
580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989)
CHEMISTRY
GEOCHEMISTRY
GEOLOGIC STRUCTURES
GEOLOGY
IGNEOUS ROCKS
NATIONAL ORGANIZATIONS
NEVADA TEST SITE
ROCKS
STRATIGRAPHY
TECTONICS
US DOE
US ORGANIZATIONS
VOLCANIC ROCKS
VOLCANISM