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Gravity and magnetic anomalies over the Derwent-Hunter Guyot, Tasman Sea
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Gravity and magnetic measurements from two profiles across the Derwent-Hunter Guyot in the Tasman Sea indicate that the volcanic core of the guyot is probably capped by vesicular volcanic rocks, and that the flanks are covered with a layer of sediments up to 2 -5 km thick as mentioned in this paper.Abstract:
Gravity and magnetic measurements from two profiles across the Derwent-Hunter Guyot in the Tasman Sea indicate that the volcanic core of the guyot is probably capped by vesicular volcanic rocks, and that the flanks are covered with a layer of sediments up to 2 – 5 km thick.read more
Citations
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Geochemical evolution during fractional crystallisation of a periodically refilled magma chamber
TL;DR: A realistic model of volcanic plumbing predicts that most of the established major, trace and isotopic chemical features of the common basalts could have been imposed during magma evolution in high level magma chambers, for which process there is extensive independent field and phase equilibria evidence.
Journal ArticleDOI
Geology of the red rocks — turbidite association, Wellington peninsula, New Zealand
TL;DR: The Torlesse terrane greywacke turbidites with intercalations of red rocks that occur in various combinations of metabasalt, chert, and coloured (red, green, grey) argillite as mentioned in this paper.
Journal ArticleDOI
Gravitational attraction of solids of revolution. Part 1: Vertical circular cylinder with radial variation of density
TL;DR: In this article, the vertical component of gravitational attraction arising from vertical circular cylinders and horizontal circular disks with radial variation of density is derived for the first or second kind and evaluated easily by numerical integration.
Journal ArticleDOI
Gravity field of Ascension Island, South Atlantic
Bibhu P. Dash,John Milsom +1 more
TL;DR: A gravity survey of Ascension Island was carried out in 1964, a total of 210 stations being occupied, and the results suggest that magma has reached the surface via three distinct conduits, the easternmost of which has been associated with extrusion of trachytic lavas.
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Morphology of the Tasman sea floor
TL;DR: In this paper, the Dampier Ridge is considered an extinct mid-ocean ridge in the central Tasman Basin, and the morphology of the ridge, of the Tasmantid and Lord Howe Island chains of seamounts, and of Lord Howe Rise.
References
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Journal ArticleDOI
Rapid computation of gravitational attraction of three-dimensional bodies of arbitrary shape
TL;DR: In this paper, an expression for the gravity anomaly at an external point caused by a horizontal lamina with the boundary of an irregular polygon is derived for computation by a high speed digital computer.
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Petrology of deep sea basalt near Hawaii
TL;DR: In this article, the authors collected from the submarine part of the east rift zone of Kilauea Volcano consist of glassy, tholeiitic pillow basalts containing vesicles whose volume and size decrease systematically with depth.
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Computation with the help of a digital computer of magnetic anomalies caused by bodies of arbitrary shape
TL;DR: In this paper, the magnetic anomalies caused by irregular polygonal laminas were derived and used to obtain the three components of the magnetic anomaly caused by a finite homogeneously magnetized body of arbitrary shape.
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Geomagnetic and solar data
TL;DR: In this paper, the authors present a series of reports which has appeared regularly in this Journal since vol. 54, no. 3, 295, 1949, with an explanation of the data given, and to vol. 59, no., 3, 423, 1954, for the definition of Ap.
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Magnetic measurements in the Cook Islands, south-west Pacific Ocean
D. J. Woodward,M. P. Hochstein +1 more
TL;DR: In this article, it was shown that the anomaly patterns of the islands in the Southern Cook Group which lie on a suboceanic ridge are not related to topography and must arise in part from sources beneath the ridge.