Bathymetry of the South Atlantic Ocean - 3°s to 40°s

Cherkis, Norman Z.; Fleming, HS; Vogt, Peter R.

doi:10.3997/2214-4609-pdb.317.sbgf125

Cited by 17 publications

(21 citation statements)

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“…ii Centre of main island from the map of Defense Mapping Agency Aerospace Center (1989a). j j Centre of seamount summit from bathymetry from Cherkis et al (1989).…”

Section: Volcano Locationmentioning

confidence: 99%

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Young tracks of hotspots and current plate velocities

Gripp

Gordon²

2002

Geophysical Journal International

826

869

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Summary Plate motions relative to the hotspots over the past 4 to 7 Myr are investigated with a goal of determining the shortest time interval over which reliable volcanic propagation rates and segment trends can be estimated. The rate and trend uncertainties are objectively determined from the dispersion of volcano age and of volcano location and are used to test the mutual consistency of the trends and rates. Ten hotspot data sets are constructed from overlapping time intervals with various durations and starting times. Our preferred hotspot data set, HS3, consists of two volcanic propagation rates and eleven segment trends from four plates. It averages plate motion over the past ≈5.8 Myr, which is almost twice the length of time (3.2 Myr) over which the NUVEL‐1A global set of relative plate angular velocities is estimated. HS3‐NUVEL1A, our preferred set of angular velocities of 15 plates relative to the hotspots, was constructed from the HS3 data set while constraining the relative plate angular velocities to consistency with NUVEL‐1A. No hotspots are in significant relative motion, but the 95 per cent confidence limit on motion is typically ±20 to ±40 km Myr−1 and ranges up to ±145 km Myr−1. The uncertainties of the new angular velocities of plates relative to the hotspots are smaller than those of previously published HS2‐NUVEL1 (Gripp & Gordon 1990), while being averaged over a shorter and much more uniform time interval. Nine of the fourteen HS2‐NUVEL1 angular velocities lie outside the 95 per cent confidence region of the corresponding HS3‐NUVEL1A angular velocity, while all fourteen of the HS3‐NUVEL1A angular velocities lie inside the 95 per cent confidence region of the corresponding HS2‐NUVEL1 angular velocity. The HS2‐NUVEL1 Pacific Plate angular velocity lies inside the 95 per cent confidence region of the HS3‐NUVEL1A Pacific Plate angular velocity, but the 0 to 3 Ma Pacific Plate angular velocity of Wessel & Kroenke (1997) lies far outside the confidence region. We show that the change in trend of the Hawaiian hotspot over the past 2 to 3 Myr has no counterpart on other chains and therefore provides no basis for inferring a change in Pacific Plate motion relative to global hotspots. The current angular velocity of the Pacific Plate can be shown to differ from the average over the past 47 Myr in rate but not in orientation, with the current rotation being about 50 per cent faster (1.06 ± 0.10 deg Myr−1) than the average (0.70 deg Myr−1) since the 47‐Myr‐old bend in the Hawaiian–Emperor chain.

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“…ii Centre of main island from the map of Defense Mapping Agency Aerospace Center (1989a). j j Centre of seamount summit from bathymetry from Cherkis et al (1989).…”

Section: Volcano Locationmentioning

confidence: 99%

“…Dashed arrow shows motion predicted by removing the Martin Vaz trend. Bathymetry is fromCherkis et al (1989). Islands are shaded, even 1000-m contours are solid, and odd 1000-m contours are dotted.…”

mentioning

confidence: 99%

Young tracks of hotspots and current plate velocities

Gripp

Gordon²

2002

Geophysical Journal International

826

869

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“…Without solving for the constraint equation, the construction of a particular metric on a given hyperkähler manifold becomes the question how to find the proper function G and contour C, i.e., the function F . The metrics we wish to study were determined in [3] using twistor methods and studied previously in [12] and [2] using twistor space methods.…”

Section: The O(2) and O(4) Legendre Transform Constructionsmentioning

confidence: 99%

“…The ALF versions of the D n metrics have been shown [1], [2], [3] to be the appropriate metrics for the moduli space of several interesting and related theories. Of perhaps most interest currently are their relationship to M-theory.…”

Section: Introductionmentioning

confidence: 99%

“…In the M-theory compactification to type IIA string theory, this corresponds to a vacuum with an orientifold 6-plane and n parallel D6-branes, respectively. A type IIB interpretation is given in [3]. They may also be found as metrics of the moduli space of d = 2 + 1 N = 4 supersymmetric SU(2) Yang-Mills theory, with n fundamental hypermultiplets.…”

Section: Introductionmentioning

confidence: 99%

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Degeneration of ALF D_n metrics

Chalmers

Roček

Wiles

1999

J. High Energy Phys.

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Beginning with the Legendre transform construction of hyperkähler metrics, we analyze the ALF version of the D n metrics. We determine the constraint equation obtained from extremizing the w coordinate of the generating function F (z,z, u,ū, w) and study its behavior as we send two of the mass parameters of the D n metric to zero. We find that the constraint equation enforces the limit that the metric becomes that of multi-Taub-NUT.1 email: chalmers@sgi2.hep.anl.gov 2

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Monopoles and holography

Bolognesi

Tong

2011

J. High Energ. Phys.

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We present a holographic theory in AdS 4 whose zero temperature ground state develops a crystal structure, spontaneously breaking translational symmetry. The crystal is induced by a background magnetic field, but requires no chemical potential. This lattice arises from the existence of 't Hooft-Polyakov monopole solitons in the bulk which condense to form a classical object known as a monopole wall. In the infra-red, the magnetic field is screened and there is an emergent SU(2) global symmetry.

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Bathymetry of the South Atlantic Ocean - 3°s to 40°s

Cited by 17 publications

References 0 publications

Young tracks of hotspots and current plate velocities

Young tracks of hotspots and current plate velocities

Degeneration of ALF D_n metrics

Monopoles and holography

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Bathymetry of the South Atlantic Ocean - 3°s to 40°s

Cited by 17 publications

References 0 publications

Young tracks of hotspots and current plate velocities

Young tracks of hotspots and current plate velocities

Degeneration of ALF Dn metrics

Monopoles and holography

Contact Info

Product

Resources

About

Degeneration of ALF D_n metrics