Heat flow, temperature, and electrical conductivity of the crust and upper mantle in the U.S.S.R.

Lubimova, E. A.; Feldman, I.S.

doi:10.1016/0040-1951(70)90110-1

Cited by 15 publications

(6 citation statements)

References 29 publications

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“…Conventional shallow marine heat flow measurements in the Black Sea were reported as early as 1963 by Sysoyev (1963), and more recently by Erickson (1970), Lubimova and Feldman (1970), Lubimova and Savostin (1973), and Erickson and Simmons (1974). Although the preceding papers include all of the heat-flow data from the Black Sea known to us, many other papers exist which discuss one or more sets of these data, but never all of the data at one time (see, for example, papers by Alexandrov et al, 1972;Savostin et al, 1973).…”

Section: Previous Workmentioning

confidence: 99%

“…All other published thermal gradient measurements were made using sediment temperatures determined at only two depths below the sea-floor Sysoyev, 1963), or have been reported without a clear description of the measurement technique and apparatus (Lubimova and Feldman, 1970). There is thus no way to tell whether a thermal gradient determined from temperature data obtained at only two depths is representative of the regional geothermal flux, or whether it has been affected by any one of the numerous environmental factors reviewed by Von Herzen and Uyeda (1963) and Langseth (1965).…”

Section: Previous Workmentioning

confidence: 99%

“…There is thus no way to tell whether a thermal gradient determined from temperature data obtained at only two depths is representative of the regional geothermal flux, or whether it has been affected by any one of the numerous environmental factors reviewed by Von Herzen and Uyeda (1963) and Langseth (1965). Thermal conductivity values, estimated for some measurements by various investigators, range from 4 mcal/cm sec °C (Sysoyev, 1963) to 2 mcal/cm sec °C, (Lubimova and Feldman, 1970), the lower values being much more consistent with conductivity values measured in most shallow marine sediments.…”

Section: Previous Workmentioning

confidence: 99%

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Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Erickson¹,

Herzen²

1978

Initial Reports of the Deep Sea Drilling Project

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Section: Previous Workmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

Section: Previous Workmentioning

confidence: 99%

See 1 more Smart Citation

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Erickson¹,

Herzen²

1978

Initial Reports of the Deep Sea Drilling Project

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“…Knowing temperatures and pressures for the three compositional models and using results of laboratory measurements of the electrical conductivity on appropriate types of dry rocks subjected to elevated temperatures and pressures (e.g., Parkhomenko 1967;Bondarenko 1968;Lubimova and Feldman 1970), it was possible to construct 'dry' models of the crust (Fig. 2), in other words, models which consider only mineral conduction.…”

Section: Dry Modelmentioning

confidence: 99%

Electrical Conductivity Models of the Crust

Dvořák¹

1975

Can. J. Earth Sci.

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Compos~tional crustal models (continental, subcontinental, oceanic) are used as a basis for a construction of the electrical conductivity distribution within the crust. In addition, the procedure incorporates other parameters, such as pressure, porosity, pore fluid salinity, and resistivity. Calculation is made in three steps. First, 'dry' models based on mineral conduction alone are constructed. Second, electrolytic conduction through the pore fluids is estimated from the Archie's Law. Both results are then combined to produce the final. 'wet' models. These appearto w e e with generalized conducrivity profiles for the stable continental areas, as well as with the published values for the oceanic crust. Magnetotelluric response curves calculated for the final models give, For each crustal type. a band of possible regpolonses which agcee well with theoretical and itr sitlr results.Les modeles de composition de la croilte (continentale-sous-continentale et oceanique) sont employes comme base pour la construction de la distribution de la conductivite electrique dans la croiite. En plus, le procedure incorpore d'autres parametres comme la pression, la porositk, la salinite du fluide poreux et la resistivite. Le calcul est fait en trois Btapes. Premitrement, des modeles secs bases sur la conduction minerale, sont construits. En second la conduction electrolytique des fluides poreux est estimee par la loi d'Archie. Les deux resultats sont ensuite combines pour produire les modtles mouilles finals. Ceux-la semblent convenir avec les ~rofiles genCralises de conductivitk des regions continentales stables et aussi avec les valeurs pubiiees de la croilte oceanique. Les courbes magneto-telluri~ues calculees Dour les modeles finals. donnent ~ --~ pour chaque type de crofite un nombre de reactions possibles qui correspondent bien avec les resultats theoriques et ceux sur place.[Traduit par le journal]

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“…This collection is drawn from Lahiri and Price (1939), Banks (1967Banks ( , 1972, Ducruix and others (1979), Currie (1968), Eckhardt (1963( ), McDonald (1957, Yukutake (1959), Alldredge (1977, Runcorn (1955), Berdichevskiy and others (1972Berdichevskiy and others ( , 1974Berdichevskiy and others ( , 1976, Kolomijtseva (1972), Vanyan (1981), Courtillot and LeMouel (1979), Fainberg andRotanova (1974), Feldman (1976), Golovkov and others (1971), Lahiri and Price (1939), Lubimova and Feldman (1970), Price (1967aPrice ( ,b, 1970, Sochelnikov (1968), Tozer (1969Tozer ( ,1970Tozer ( ,1981, Eckhardt andothers (1963), andHutton (1976).…”

Section: Introductionmentioning

confidence: 99%

Chapter 6: Electrical structure of the crust and upper mantle beneath the United States; Part 1, Methods for determining the conductivity profile

Keller¹

1989

Geological Society of America Memoirs

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The electrical conductivity of the Earth is a property that responds primarily to changes in the water content of a rock or to changes in temperature. At the temperatures present on the Earth's surface, conductivity depends most strongly on the amount and salinity of the ground water in a rock. At great depths, where the ambient temperature exceeds 500° to 600°C, conductivity depends on the motion of ions or electrons in the solid minerals of a rock, which in turn depends strongly on temperature. At intermediate depths, ranging from tens to hundreds of kilometers, conductivity is a function of both temperature and water content, with the relative importance varying with rock type.Many methods have been used to study the conductivity of the Earth. Relatively direct measurements are made in wells and boreholes, to depths of about 8 km. Directcurrent resistivity sounding has been used to explore the depths of sedimentary basins and the upper part of the crystalline basement. Most information about the crust and mantle has been obtained using the time-varying part of the Earth's magnetic field. In the magnetotelluric method, simultaneous observations of the magnetic and electric fields at a single site are used to determine a conductivity profile. In the geomagnetic deepsounding method, the magnetic field is observed simultaneously at many stations, forming a network. The conductivity structure is determined from the spatial variation of the time-varying magnetic field strengths. Relatively simple methods of interpretation used in the past have provided ambiguous results, so that much of the information about the electrical structure of the Earth lacks the desired degree of reliability. More recently, methods of data acquisition and interpretation have been developed to make future use of the magnetotelluric and geomagnetic deep-sounding methods considerably more reliable.Based on results from all these methods, the conductivity structure of the Earth appears to be grossly zoned. The zones, or shells, in order from the surface inward are: (I) a surface veneer of wet, conductive rocks, to depths ranging from a few hundred meters to a few tens of kilometers: (2) a zone of very low conductivity crystalline rocks that are relatively dry and cool, extending to depths of several tens or hundreds of kilometers; (3) a zone of gradually increasing conductivity, attributed to the development of thermally excited conduction mechanisms; (4) a zone beginning at a depth between 300 and 700 km, in which the conductivity rapidly increases by several orders of magnitude; and (5) a zone of gradually increasing conductivity to the base of the mantle. Sparse evidence indicates that the core is highly conductive, with a conductivity of 100,000 to 1 million Siemans per meter (S/m).

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Heat flow, temperature, and electrical conductivity of the crust and upper mantle in the U.S.S.R.

Cited by 15 publications

References 29 publications

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Electrical Conductivity Models of the Crust

Chapter 6: Electrical structure of the crust and upper mantle beneath the United States; Part 1, Methods for determining the conductivity profile

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Heat flow, temperature, and electrical conductivity of the crust and upper mantle in the U.S.S.R.

Cited by 15 publications

References 29 publications

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Electrical Conductivity Models of the Crust

Chapter 6: Electrical structure of the crust and upper mantle beneath the United States; Part 1, Methods for determining the conductivity profile

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Product

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Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B

Downhole Temperature Measurements and Heat Flow Data in the Black SeaDSDP Leg42B