scholarly journals NEAR-SURFACE SPALLING FROM A NUCLEAR EXPLOSION IN A SALT DOME

1966 ◽  
Author(s):  
J Eisler
Keyword(s):  
Nuclear Explosion ◽  
Salt Dome ◽  
Near Surface

Shear waves from a nuclear explosion in a salt cavity

1968 ◽  
Vol 58 (6) ◽  
pp. 2043-2051
Author(s):  
William R. Perret
Keyword(s):  
Particle Velocity ◽  
Nuclear Explosion ◽  
Shear Waves ◽  
Vertical Motion ◽  
Salt Dome ◽  
Explosive Source ◽  
Level Plane ◽  
Stable Cavity

ABSTRACT Shear waves have been resolved in records of acceleration and particle velocity resulting from the Sterling event which was a nuclear explosion (380 tons) within the stable cavity left by the Salmon detonation in the Tatum salt dome. These shear waves were strongest in records of vertical motion at stations in the shot-level plane, but were detectable in records from both vertical and horizontal radial gages above and below that elevation. No appreciable shear waves could be identified in records from shot-level gages oriented horizontally. All instruments involved in this study were situated within the salt dome at ranges between 166 and 660 meters from the explosive source. Shear waves carried over 95 per cent of the energy in vertical shot-level records, but they represented less than 11 per cent of the energy in horizontal radial shot-level records. Cause of the vertically polarized shear waves is considered to be vertical asymmetry at the source.

Aftershocks of the Benham nuclear explosion

1969 ◽  
Vol 59 (6) ◽  
pp. 2271-2281
Author(s):  
R. M. Hamilton ◽  
J. H. Healy
Keyword(s):  
Fault Plane ◽  
Nuclear Explosion ◽  
Test Site ◽  
Strike Slip ◽  
Nevada Test Site ◽  
Ground Zero ◽  
Fault Plane Solutions ◽  
Fault Movement ◽  
Near Surface ◽  
Earthquake Distribution

abstract The Benham nuclear explosion, a 1.1 megaton test 1.4 km beneath Pahute Mesa at the Nevada Test Site, initiated a sequence of earthquakes lasting several months. The epicenters of these shocks were located within 13 km of ground zero in several linear zones that parallel the regional fault trends. Focal depths range from near surface to 6 km. The earthquakes are not located in the zone of the major ground breakage. The earthquake distribution and fault plane solutions together indicate that both right-lateral strike-slip fault movement and dip-slip fault movement occurred. The explosion apparently caused the release of natural tectonic strain.

GRAVITY INVESTIGATIONS IN THE HOCKLEY SALT DOME, HARRIS COUNTY, TEXAS

Geophysics ◽  
1955 ◽  
Vol 20 (4) ◽  
pp. 829-840 ◽  
Author(s):  
W. E. Allen ◽  
H. J. Caillouet ◽  
L. Stanley
Keyword(s):  
Salt Dome ◽  
Salt Rock ◽  
Harris County ◽  
Near Surface ◽  
Gravity Changes ◽  
Clastic Sediments ◽  
Gravity Measurements ◽  
Density Values ◽  
Cap Rock ◽  
Gypsum Rock

Gravity measurements at the surface, in the shaft, and in the drifts of the United Salt Company’s mine at the Hockley salt dome have been analyzed to determine densities of sediments, cap rock, and salt rock. The curve derived from the gravity changes indicates the presence of lithologic breaks that correspond with the known geology of the shaft. The density values computed from this curve correspond closely with acceded values for near‐surface clastic sediments, limestone, gypsum rock, anhydrite rock, and salt rock.

scholarly journals Strain Hardening in Salt—Results of the SALMON Experiment

1990 ◽  
Vol 112 (2) ◽  
pp. 145-148 ◽  
Author(s):  
L. A. Glenn
Keyword(s):  
Yield Strength ◽  
Strain Hardening ◽  
Nuclear Explosion ◽  
Fluid Pressure ◽  
Salt Dome ◽  
Pore Fluid ◽  
Laboratory Scale ◽  
Experimental Results ◽  
Pore Fluid Pressure

SALMON was a nuclear explosion in the Tatum salt dome, near Hattiesburg, Mississippi, that took place on October 22, 1964. Computational attempts to simulate the experimental results had been largely unsuccessful. Recent calculations suggest that the reason is that the salt yield strength is extremely sensitive to strain hardening. The hardening effect had not been observed in laboratory-scale measurements, which were not made at small enough strain levels and may not have been representative of in-situ pore-fluid pressure.

scholarly journals EARTH VIBRATIONS FROM A NUCLEAR EXPLOSION IN A SALT DOME

1967 ◽  
Author(s):  
W. V. Mickey ◽  
L. M. Lowrie ◽  
T. R. Shugart
Keyword(s):  
Nuclear Explosion ◽  
Salt Dome

Benthic foraminiferal zonation in deep-water carbonate platform margin environments, northern Little Bahama Bank

1988 ◽  
Vol 62 (01) ◽  
pp. 1-8 ◽  
Author(s):  
Ronald E. Martin
Keyword(s):  
Deep Water ◽  
Benthic Foraminifera ◽  
Carbonate Platform ◽  
Sedimentary Facies ◽  
Depositional Environments ◽  
Near Surface ◽  
Sediment Gravity Flows ◽  
Gravity Flows ◽  
Platform Margin ◽  
Water Carbonate

The utility of benthic foraminifera in bathymetric interpretation of clastic depositional environments is well established. In contrast, bathymetric distribution of benthic foraminifera in deep-water carbonate environments has been largely neglected. Approximately 260 species and morphotypes of benthic foraminifera were identified from 12 piston core tops and grab samples collected along two traverses 25 km apart across the northern windward margin of Little Bahama Bank at depths of 275-1,135 m. Certain species and operational taxonomic groups of benthic foraminifera correspond to major near-surface sedimentary facies of the windward margin of Little Bahama Bank and serve as reliable depth indicators. Globocassidulina subglobosa, Cibicides rugosus, and Cibicides wuellerstorfi are all reliable depth indicators, being most abundant at depths >1,000 m, and are found in lower slope periplatform aprons, which are primarily comprised of sediment gravity flows. Reef-dwelling peneroplids and soritids (suborder Miliolina) and rotaliines (suborder Rotaliina) are most abundant at depths <300 m, reflecting downslope bottom transport in proximity to bank-margin reefs. Small miliolines, rosalinids, and discorbids are abundant in periplatform ooze at depths <300 m and are winnowed from the carbonate platform. Increased variation in assemblage diversity below 900 m reflects mixing of shallow- and deep-water species by sediment gravity flows.

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