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Friday, July 10, 2020 | History

2 edition of Gravity anomalies and their relation to major tectonic features in the north-central Pacific. found in the catalog.

Gravity anomalies and their relation to major tectonic features in the north-central Pacific.

William H Lucas

Gravity anomalies and their relation to major tectonic features in the north-central Pacific.

by William H Lucas

  • 236 Want to read
  • 16 Currently reading

Published by National Oceanic and Atmospheric Administration, Environmental Research Laboratories; for sale by the Supt. of Docs., U.S. Govt. Print. Off. in Boulder, Colo .
Written in English

    Subjects:
  • Gravity -- Pacific Ocean,
  • Geology -- Pacific Ocean

  • Edition Notes

    Statement[By] William H. Lucas
    SeriesNOAA technical report ERL 214-POL 6, NOAA technical report ERL -- 214, NOAA technical report ERL -- 6
    ContributionsUnited States. National Oceanic and Atmospheric Administration
    The Physical Object
    Pagination19 p.
    Number of Pages19
    ID Numbers
    Open LibraryOL15474310M

    Tectonic evolution of the Pacific margin of Antarctica 2. Structure of Late Cretaceous–early Tertiary plate boundaries ache gravity anomaly’’ (DGGA), a linear anomaly with a anomalies, and explain their origin in terms of our new tectonic framework [Larter et al., ]. 2. To determine the mechanism of deformation at the.   Eleven island-atoll types typical of the Pacific lithospheric plate are described. Tectonic-volcanic information which might help explain present island-atoll forms is then detailed. This information concerns the movement of the Pacific lithospheric plate into deeper occan as the plate ages, effects of reheating mid-plate areas, compressional effects before the plate is Cited by:

    CAN GRAVITY ANOMALIES BE USED TO MAP PRE-PLIOCENE SEDIMENTARY BASINS IN THE CENTRAL COAST RANGES, CALIFORNIA? Daniel Scheirer1, Donald Sweetkind2, Victoria Langenheim3, and Richard Stanley4 1U.S. Geological Survey, Middlefield Road, MS , Menlo Park, CA , [email protected] to construct a tectonic history of the North Pacific from about m.y. ago, the approximate age of anomaly M-0, to 50 m.y. ago, the time of subduc- tion of the Kula ridge (anom time scale of Cox in Harland et al. [33]). 2. North Pacific geophysical data Emperor trough.

    A Tectonic Overview of the Central Midcontinent on *FREE* shipping on qualifying cturer: U. S. Nuclear Regulatory Comm. T/F. Sunlight penetrates to a greater depth in the coastal waters than out in the open ocean. T/F. Fish that use "countershading" typically have a light back and a dark undersurface. The .


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Gravity anomalies and their relation to major tectonic features in the north-central Pacific by William H Lucas Download PDF EPUB FB2

Gravity anomalies and their relation to major tectonic features in the north-central Pacific. Boulder, Colo., National Oceanic and Atmospheric Administration, Environmental Research Laboratories; for sale by the Supt. of Docs., U.S. Govt. Print. Alone or in combination with other data (such as satellite, astrogeodetic, or geophysical), gravity data are used to calculate deflection of the vertical components, geoidal heights, gravity disturbance components, and datum shifts for orienting local geodetic datums to an Earth-centered world geodetic : Allen M.

Hittelman, Donald Scheibe, Clyde C. Goad. Gravity anomalies and their relation to major tectonic features in the north-central Pacific. Published Date: South Pacific traverse RPSU, Pago Pago to Callao to Seattle.

Personal Author: New Antarctic gravity anomaly grid for enhanced geodetic and geophysical studies in by: 1.

Gravity anomalies and their relation to major tectonic features in the north-central Pacific / By William H Lucas and United States. National Oceanic and Atmospheric Administration.

Most of the major tectonic features of these regions are reflected in Fig. 3, where the gravity field increases consistently from the continent to the ocean basins.

The Laxmi and the Chagos-Laccadive ridges in the Arabian Sea (7 and 8, Fig. 1) and Eighty Five East and the Ninety East ridges (20 by: The gravity anomalies in the eastern sub-basin show a series of sharp positive peaks in FAA, which coincide with the Scarborough seamounts chain or close to the ridge axis.

In the northwestern sub-basin, the gravity anomaly features relate to the ridge are somewhat unclear (Figs. 2, 4, 6).Cited by: To decipher the distribution of mass anomalies near the earth's surface and their relation to the major tectonic elements of a spreading plate boundary, we have analyzed shipboard gravity data in the vicinity of the southern Mid-Atlantic Ridge at 31 ° S.

The area of study covers six ridge segments, two major transforms, the Cox and Meteor, and. anomalies have been created by the New England, Madeira, Canary, and Cape Verde hot spots.

Some features, notably the Bermuda Rise, are not so clearly related to hot spot activity. [4] While many gravity and seismic investigations have been conducted locally in the North Atlantic, few studies have evaluated gravity anomalies andCited by: deducing the geologic history of the Central Pacific Basin but, because of their location on Oahu, they allow tectonic and eustatic deduc­ tions to be made concerning the submergence and emergence of the Hawaiian Archipelago.

Furthermore, the Ewa holes are related to other deep drilling investigations in the Hawaiian area planned for the near. THE TECTONICS OF NORTH AMERICA 2.

Neotectonic maps are a kind of paleotectonic map in that they represent the tectonic features produced during one part of geologic time, in this case the Quaternary or at most the Quaternary and latest Tertiary. Because of the epeirogenic nature of much of this latest deformation, neotectonic mapsCited by: The displacements and gravity anomalies of the deformation produced by individual loads where so distinguished give estimates of the thickness and viscosity of the lithosphere.

The statistical analysis of gravity anomalies over large areas is also possible and can lead to the identification of areas of different plate thicknesses.

Magnetic anomalies in East Antarctica: a window on major tectonic provinces and their boundaries A. Golynsky VNIIOkeangeologia, 1, Angliysky Avenue, St.-Petersburg,Russia.

([email protected]) Abstract An analysis of aeromagnetic data compiled within the Antarctic Digital Magnetic Anomaly ProjectCited by: [1] Multichannel seismic reflection profiles, gravity measurements, and bathymetric soundings, in conjunction with field geological reconnaissance and remote sensing images, reveal with unprecedented detail the morphostructure of a major segment of the South America–Scotia plate boundary in the Tierra del Fuego region.

This segment, known as the Magallanes‐Fagnano. Major tectonic elements and other features for northern Nevada. Ranges are shaded. RMA and GA are the eastern limits of the Roberts Mountains and Golconda allochthons, respectively [Stewart, ].Ruled area of the northern Nevada rift (NNR) from John et al.

and southern extent (double dashed lines) from Zoback et isopleth of initial 87 Sr/ 86 Sr values (ISr = Cited by: Residual gravity anomalies (contour interval 2 mGal) with superimposed geologic features of Crater Flat domain and location of interpretive cross section B–B′ (from Snyder and Carr,their Figures 7,9,12).

Stratigraphic units shown on cross section (lower right) are: lower and middle Paleozoic rocks—Pzca; upper Paleozoic clastic rock.

Comparison of gravity anomaly between mature and immature intra-oceanic subduction zones in the western Pacific Article in Tectonophysics (3) September with Reads. The global mid-ocean ridge system is one of the most striking geological features on the surface of the Earth.

In this system, the East Pacific Rise (EPR) is the fastest spreading ridge and is thus considered as the most active magmatically among the plate boundaries. Tectonic information from the area comes from the mapping of oceanic spreading anomalies, fracture zones and other topographic features (Figures 1 and 2).

Topographic features (except Shatsky Rise) show up clearly on the satellite gravity data. Cambridge Core - Solid Earth Geophysics - Active Faults of the World - by Robert YeatsCited by:   "Gravity Anomalies and Their Relation to Major Tectonic Features in the North-Central Pacific Gravity anomalies in the north-central Pacific have been obtained aboard the USC&GS Ship SURVEYOR with a LaCoste and Romberg surface-ship gravity meter.

However, many other young tectonic features such as rift zones exist further offshore (Lonsdale ). Tectonic deformation of the Pacific lithosphere. We examine several possible explanations for the oceanic lithosphere seismicity. First, it may result from the broad Pacific–North America Plate boundary by: 3.In the Precambrian Shield of Australia it is clear that the main features of the basement blocks and of their cover basins are the consequence of rather well defined episodes of basement reactivation which are reflected in the pattern of dipole gravity anomalies and in Author: R.

W. R. Rutland.[22] We have produced a new set of Late Cretaceous tectonic reconstructions for the Pacific margin of Antarctica by digitizing tectonic features and magnetic anomalies identified in the southwest Pacific off New Zealand and in the Bellingshausen Sea, and reconstructing them using finite rotations for chrons 30r, 33y, 34y, and c.

90 by: