A CONTINUOUS SEISMIC PROFILE ON THE CONTINENTAL SHELF OFF NE. LABRADOR

1966 ◽  
Vol 3 (5) ◽  
pp. 725-730 ◽  
Author(s):  
A. C. Grant
Keyword(s):  
Continental Shelf ◽  
Seismic Profile ◽  
Continuous Seismic Profile

Morphologie du substratum de l'Etang de Berre

1967 ◽  
Vol S7-IX (1) ◽  
pp. 88-92
Author(s):  
Olivier Leenhardt ◽  
Max Robert Roux
Keyword(s):  
Upper Cretaceous ◽  
Seismic Profile ◽  
Continuous Seismic Profile

Abstract A continuous seismic profile has shown that the Berre lagoon (Bouches-du-Rhone, France) comprises two depressions, cut in the upper Cretaceous or Miocene substratum, which are filled by sediments giving variable reflections. The depressions may have formed as a result of two Ponto-Pliocene erosional cycles succeeded by an influx of mixed detritus in the Quaternary.

GEOPHYSICAL INVESTIGATIONS IN THE AREA OF THE PERTH BASIN, WESTERN AUSTRALIA

Geophysics ◽  
1965 ◽  
Vol 30 (6) ◽  
pp. 1026-1052 ◽  
Author(s):  
L. V. Hawkins ◽  
J. F. Hennion ◽  
J. E. Nafe ◽  
R. F. Thyer
Keyword(s):  
Continental Shelf ◽  
Western Australia ◽  
Structural Control ◽  
Seismic Profile ◽  
Sediment Thickness ◽  
The West ◽  
Western Margin ◽  
Eastern Margin ◽  
Geophysical Investigations ◽  
Southward Extension

Marine geophysical investigations in the area of the Perth Basin lead to proposed changes in the structural control of the basin and of the structure within the basin. The main north‐south graben structure appears to be crossed by a series of major faults which trend roughly north‐northwest. A broadening of the basin to a width of just over 100 km (65 miles) to the west in the area between Perth and Harvey, which was earlier indicated by aeromagnetic results, appears to be produced by two such faults: The southern fault does not cross the graben but merges with it in the form of the Dunsborough Fault; the proposed northern fault crosses the graben to produce a break in continuity of the Darling Fault which marks the eastern margin of the basin. The northern fault appears to have caused a division of the main sedimentation axis of the Perth Basin into two near parallel axes within the widened section of the basin. The Dandaragan Trough which forms the eastern axis now appears to terminate at the Darling Fault between Pinjarra and Harvey. The western axis continues to the southeast into the Bunbury Trough. This suggests the presence of a basement and anticlinal ridge which may produce favourable traps for oil or gas within the basin. The western margin of the basin appears to be formed by an eastward‐tilted basement with associated faulting which, in places, assumes major proportions. A tentative estimate of sediment thickness of about 5.7 km (18,600 ft) is obtained from a seismic profile near the axis of sedimentation on the extension of the Bunbury Trough. This figure is our preferred interpretation, but it would have to be reduced to about 3.5 km should a 5‐km/sec layer turn out to be basement. The southward extension of the Darling Fault onto the narrow continental shelf appears to be observed with a throw of two km to the south of Pt. D’Entrecasteau.

Xác định cấu trúc hình thái của châu thổ cửu long trên thềm lục địa ven bờ Cà Mau trên cơ sở tài liệu địa chấn nông phân giải cao

2008 ◽  
Vol 30 (4) ◽  
pp. 356-362
Author(s):  
Nguyễn Tiến Hải ◽  
Phùng Văn Phách ◽  
K. Stattegger
Keyword(s):  
High Resolution ◽  
Continental Shelf ◽  
Seismic Profile ◽  
Shelf Area ◽  
Profile Data ◽  
Shallow Seismic ◽  
Continental Shelf Area

Determination of Cuu Long delta's morphology in the Ca Mau continental shelf area by applying high resolution shallow seismic profile data

GEOPHYSICAL CASE HISTORY OF THEUVENINS CREEK FIELD, TYLER COUNTY, TEXAS

Geophysics ◽  
1961 ◽  
Vol 26 (6) ◽  
pp. 682-690
Author(s):  
T. Y. Chang
Keyword(s):  
Oil And Gas ◽  
Correlation Method ◽  
Seismic Profile ◽  
Seismic Survey ◽  
South Central ◽  
Cumulative Production ◽  
History Of ◽  
Structural Closure ◽  
Continuous Seismic Profile ◽  
Made In

Theuvenins Creek Field is located along the Wilcox producing trend in south‐central Tyler County, Texas. The field was discovered jointly by Sinclair Oil and Gas Company and the Atlantic Refining Company. The first seismic survey of the area was made in 1938. In 1942, a reconnaissance seismic survey was made using the spot correlation method. This work indicated anomalous conditions. In 1955, the area was detailed using a continuous seismic profile method. The seismic data were later reviewed, and the reviewed interpretation substantiated the existence of Wilcox structural closure. Based on seismic evidence, Atlantic and Sinclair spudded the Brown Fee No. 1 wildcat well on August 15, 1957. This well was completed on October 12, 1957 as the discovery well of the field. From an Upper Wilcox sand the well produced 279 barrels of oil per day. Subsequent drilling developed two producing sands in the Uppper Wilcox. A total of 38 producing wells have been drilled on the structure with no dry hole to date. To January, 1961, the total cumulative production from the field was 1.4 million barrels of oil.

Isotopic characterization of lifetime movement by two demersal fishes from the northeastern Gulf of Mexico

2021 ◽  
Vol 657 ◽  
pp. 161-172
Author(s):  
JL Vecchio ◽  
JL Ostroff ◽  
EB Peebles
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Life Histories ◽  
Linear Mixed Model ◽  
Trophic Position ◽  
Eye Lens ◽  
Outer Continental Shelf ◽  
Red Grouper ◽  
Lens Diameter ◽  
Isotopic Characterization

An understanding of lifetime trophic changes and ontogenetic habitat shifts is essential to the preservation of marine fish species. We used carbon and nitrogen stable isotope values (δ13C and δ15N) recorded within the laminar structure of fish eye lenses, reflecting both diet and location over time, to compare the lifetime trends of 2 demersal mesopredators. Tilefish Lopholatilus chamaeleonticeps inhabit burrows on the outer continental shelf, which results in exceptional site fidelity. Red grouper Epinephelus morio are spawned on the middle to outer continental shelf, move to the inner shelf for the juvenile period, and return offshore upon sexual maturity. Both species inhabit the eastern Gulf of Mexico, a region with a distinctive offshore-inshore gradient in background δ13C values. Within individual tilefish (n = 36), sequences of δ13C values and δ15N values had strong, positive correlations with eye-lens diameter, and strong correlations between the 2 isotopes (mean Spearman r = 0.86), reflecting an increase in trophic position with growth and little lifetime movement. In red grouper (n = 30), δ15N values positively correlated with eye-lens diameter, but correlations between δ15N and δ13C were weak (mean Spearman r = 0.29), suggesting cross-shelf ontogenetic movements. Linear mixed model results indicated strong relationships between δ15N and δ13C values in tilefish eye lenses but no convergence in the red grouper model. Collectively, these results are consistent with previously established differences in the life histories of the 2 species, demonstrating the potential utility of eye-lens isotope records, particularly for investigating the life histories of lesser-known species.

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