Journal ArticleDOI
Magnetism and Opaque Mineralogy of Basalts from the Mid-Atlantic Ridge at 45° N
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The volcanic layer may be only 200 m thick at 45° N and oxidation of titanomagnetite may be responsible for the decrease in amplitude of the magnetic anomalies away from the ridge axis as discussed by the authors.Abstract:
The volcanic layer may be only 200 m thick at 45° N and oxidation of titanomagnetite may be responsible for the decrease in amplitude of the magnetic anomalies away from the ridge axis.read more
Citations
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The Evolution of the Indian Ocean since the Late Cretaceous
Dan McKenzie,John G. Sclater +1 more
TL;DR: A detailed study of ship and aeroplane tracks across the Indian Ocean was carried out in this paper, and it was shown that Africa is now moving northward at 2 cm/y relative to Antarctica in the South West Indian Ocean.
Journal ArticleDOI
Hydrothermal Circulation and Geochemical Flux at Mid-Ocean Ridges
Thomas J. Wolery,Norman H. Sleep +1 more
TL;DR: In this article, the authors estimated the flow rate of sea water through sub-sea-floor hydrothermal systems at mid-ocean ridges by considering the rate at which circulating fluid must advect heat out of the spreading plates into the oceans.
Journal ArticleDOI
Detailed aeromagnetic investigation of the Arctic Basin
TL;DR: The U.S. Navy has been engaged in a long-term program of mapping, in relative detail, the earth's magnetic field over that portion of the Arctic Basin accessible to the P3 aircraft.
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Detailed near-bottom geophysical study of the Gorda Rise
Tanya Atwater,John D. Mudie +1 more
TL;DR: A deeply towed instrument package was used to survey the fine details of topography, sediment distribution, and magnetization of the Gorda rise, an active spreading center off northern California as discussed by the authors.
Journal ArticleDOI
Hydrothermal mineralization at seafloor spreading centers
TL;DR: In this paper, the authors review the knowledge of processes of hydrothermal mineralization and the occurrence and distribution of mineral deposits at the global oceanic ridge-rift system and consider the occurrence of Hydrothermal mines in terms of spatial and temporal frames of reference.
References
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Journal ArticleDOI
Magnetic properties and oxidation of iron‐titanium oxide minerals in Alae and Makaopuhi Lava Lakes, Hawaii
TL;DR: In this paper, the authors show that the transition from medium to high Curie temperatures occurs between 850° and 300°C, varying from one drill hole to another, and is accompanied by a marked increase in the strong field magnetization at room temperature.
Journal ArticleDOI
Iron‐titanium oxides and oxygen fugacities in volcanic rocks
I. S. E. Carmichael,J. Nicholls +1 more
TL;DR: In this article, it was shown that the ferric-ferrous equilibrium is controlled by temperature, oxygen fugacity, and the composition of the liquid, particularly its alkali content.
Journal ArticleDOI
Formation of Magnetic Anomaly Pattern of Mid-Atlantic Ridge
D. H. Matthews,Jennifer Bath +1 more
TL;DR: In this paper, it was shown that the great majority of dyke injections must occur within the width of the median valley; the standard deviation of the distribution of dykes (assumed normal) must be less than about 5 km.
Journal ArticleDOI
Formation of magnetic anomaly patterns by dyke injection
TL;DR: In this paper, a Monte Carlo method is used to simulate the linear magnetic anomalies observed over much of the mid-oceanic ridge system, which are believed to be caused by crustal spreading from the ridge center coupled with reversals of the earth's magnetic field.
Journal ArticleDOI
A test of the dipole hypothesis
Neil D. Opdyke,K.W. Henry +1 more
TL;DR: The magnetic inclinations of 52 cores from all oceans of the world were studied in an attempt to test the hypothesis that, when averaged over periods of 10 5 years or so, the axis of the earth's magnetic field coincides with its axis of rotation as mentioned in this paper.