The electrical conductivity of the Earth and planets

Hutton, V.R.S.

doi:10.1088/0034-4885/39/6/001

Cited by 32 publications

(13 citation statements)

References 194 publications

(63 reference statements)

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“…A number of reviews [Schmucker, 1970b;Gough, 1973b;Hutton, 1976] of various aspects of this subject have appeared. A review of theoretical models for electromagnetic induction in the ocean has been given by Ashour [1973], and a review of techniques and instrumentation for the study of electromagnetic induction itt sea by Filloux [1973].…”

mentioning

confidence: 99%

The geomagnetic coast effect

Parkinson¹,

Jones²

1979

Reviews of Geophysics

119

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mentioning

confidence: 99%

The geomagnetic coast effect

Parkinson¹,

Jones²

1979

Reviews of Geophysics

119

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“…Such surface phenomena are often called channelling phenomena (e.g. Banks, 1973;Hutton, 1976a). Such effects have now been recognized in several regions: e.g., in the English Channel (Van Bemmelen, 1908); in the British Isles (several papers); in the Seine basin (Moureau, 1893;Rossignol and Le Mougl, 1971); in the Bonifacio Straits (Giorgi and Yokoyama, 1967;1968); in the north German conductivity anomaly, extending eastward to Poland (Jankowski, 1967;Untiedt, 1970; and references therein); in the Ishikari plain in southern Hokkaido (Nishida, 1976); in the St. Lawrence river (several papers by Canadian workers; refer, e.g.…”

Section: Surface Phenomena -Channellingmentioning

confidence: 99%

“…of different analysis techniques: the literature is very large indeed (refer, e.g., to Schmucker, 1964Schmucker, , 1970aEverett and Hyndman, 1967a;Schmucker and Jankowski, 1972;Banks, 1973;Frazer, 1974;Alabi et al, 1975;Adam, 1976;Beamish, 1976Beamish, , 1977Hutton, 1976a;Lanzerotti, 1979a, 1980a andreferences therein).…”

mentioning

confidence: 99%

Electrical conductivity structure in the lower crust

Gregori¹,

Lanzerotti²

1982

Geophysical Surveys

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Abstract. The subject is reviewed, notwithstanding the existence of a number of disagreeing and/or controversial results found in the literature. First, a brief critical reexamination of the methodology is presented. Second, it is attempted to put the results, or partial conclusions, by different authors, using different methods and referring to different geographical regions, into a working scheme. This is done by investigating, as far as possible, the relationships between the electrical conductivity information and other types of geophysical and geological information for each geographical area investigated. It appears almost impossible to draw general conclusions that hold for the entire Earth. Conclusions are given for those areas with some very well-defined geomorphological characters. Unfortunately, the available investigations still appear to give a poor coverage of several types of geographic areas with specific tectonic characteristics, and certainly the scientific coverage by electromagnetic methods of investigation cannot be compared with those available today from seismological methods. Investigating the electrical conductivity structure of the lower crust certainly opens relevant heuristic possibilities, but there appears to be a great need both for a ref'mement in the basic methodology, and for a better coverage of the investigated areas.

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“…Thus, the radial conductivity distribution has been inferred down to a depth of 2000 km or so (e.g. Rikitake, 1966;Hutton, 1976).…”

Section: Introductionmentioning

confidence: 99%

“…Studies of conductivity anomalies in the Earth have been reviewed in detail by Rikitake (1966Rikitake ( , 1971, Hutton (1976), and others. In this article much stress will be put on newly disclosed anomalies and their geophysical significance.…”

Section: Introductionmentioning

confidence: 99%

Electrical conductivity anomalies in the earth

Honkura

1978

Geophysical Surveys

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Abstract. Anomalies of short-period geomagnetic variations have been found in various regions over the world. It is known that such anomalies arise from electromagnetic induction within an electrical conductivity anomaly or from local perturbation of induced electric currents by a conductivity anomaly. In order to investigate a regional electric state in the Earth, conductivity anomaly (CA) studies based on anomalous behaviors of geomagnetic variations have been extensively undertaken, as well as studies based on magnetotellurics in which induced currents are directly used.Some of the geomagnetic variation anomalies, however, turned out to be caused by surface conductors, such as sea water and sediments. Anomalies of this sort have been intensively studied and classified into coast, island, peninsula, and strait effects in the case of sea effects. Three-dimensional conduction or channelling of induced electric currents is sometimes observed in the cases of sediments and some crustal conductivity anomalies. However, anomalies of such surface origins often provide some information of the underground conductivity structure.Electrical conductivity anomalies can be classified into two types: anomalies originating in the crust and in the upper mantle. Many of crustal anomalies are well correlated with metamorphic belts, fracture zones, and hydrated layers, and magnetic and gravity anomalies are also often found over the conductivity anomalies. Most of mantle anomalies have been interpreted mainly in terms of high temperature and partial melting, since conductivity anomalies coincide well with anomalies in heat flow and seismic wave velocities.

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The electrical conductivity of the Earth and planets

Cited by 32 publications

References 194 publications

The geomagnetic coast effect

The geomagnetic coast effect

Electrical conductivity structure in the lower crust

Electrical conductivity anomalies in the earth

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