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II. Magnetic anomalies of the GH80-5 survey area in the central Pacific Basin
1026
D. SubmarineGeologyand Geophysics
been retained in the diatom oxygen isotope record throughout the section. An oxygen isotope stratigraphy and chronology are assigned. Inst. of Earth Sci., Acad. Sin., P.O. Box 23-59, Taipei, Taiwan,
D200. Gravity, geodesy, magnetism 85:7134 Joshima, Masato, 1984. III. Gravimetric survey in the GHS0--5 cruise [central Pacific]. Geol. Surv. Japan Cruise Rept, 20:23-34. Free-air gravity anomaly data are presented for the area bounded by 9°20"-10°30"N and 174010 "175 ° 10"W. Results are discussed briefly in terms of the region's physiography. Geol. Surv. of Japan, Ibaraki-ken, Japan. (fcs) 85:7135 Joshima, Masato and Akira Nishimura, 1984. X. Remanent magnetization of sediment cores in GHS0--5 survey area [central Pacific]. Geol. Surv. Japan Cruise Rept, 20:165-192. Geol. Surv. of Japan, Ibaraki-ken, Japan. 85:7136 Lanzerotti, L.J., L.V. Medford, C.G. Maclennan, D.J. Thomson, A. Meloni and G.P. Gregori, 1985. Measurements of the large-scale directcurrent Earth potential and possible implications for the geomagnetic dynamo. Science, 229(4708): 47-49. AT&T Bell Lab., Murray Hill, NJ 07974, USA. 85:7137 Ramaswamy, V., A.K. Agarwal and B.P. Singh, 1985. A three--dimensional numerical model study of electromagnetic induction around the Indian Peninsula and Sri Lanka Island. Phys. Earth planet. Interiors, 39(1):52-61. Agarwal: Indian Inst. of Geomag., Colaba, Bombay 400 005, India. 85:7138 Stone, D.B., 1985. Megaplates, microplates and paleomagnetism. J. Geornagn. Geoelect., 37(1): 147-152. Highlights of recent developments in paleomagnetic studies are referenced in this brief review. Emphasis is on (1) the continuing studies of the relative motions of the main continental (cratonic) blocks, (2) unravelling the history of allochthonous terranes, and (3) the problems of deviation of the geomagnetic field with respect to the spin axis of the Earth and its
OLR (I 985)32 ~121
bearings on paleogeography and climate. Geophys. Inst., Univ, of Alaska, Fairbanks, AK 99701, USA. (fcs)
85:7139 Tamaki, Kensaku and Masato Joshima, 1984. 11. Magnetic anomalies of the GH80-5 survey area in the central Pacific Basin. Geol. Surv. Japan Cruise Rept, 20:20-22. Geol. Surv. of Japan~ lbaraki-ken, Japan.
85:7140 Vincenz, S.A. and M. Jelenska, 1985. Paleomagnetic investigations of Mesozoic and Paleozoic rocks from Svalbard. Tectonophysics, 114(1-4): 163-180. A paleomagnetic study of Late Mesozoic dykes and sills and Paleozoic sediments from Spitsbergen gives the position of the pole in the Late Mesozoic and Paleozoic to the south of corresponding poles for Europe and North America. The data suggest that Svalbard has moved independently of Europe and North America at least in the Late Mesozoic, and thus might behave as a microplate or block. Dept. of Earth and Atmos. Sci., Saint Louis Univ., St. Louis, MO 63156-8099, USA.
D210. Heat flow 85:7141 Joshima, Masato, 1984. VI. Heat flow measurement in the GH80-5 area [8°30"-10°25"N and 173°40"-174°30"W]. Geol. Surv. Japan Cruise Rept, 20:53-66. Geol. Surv. of Japan, lbarakiken, Japan.
85:7142 Noel, Mark, 1985. Heat flow, sediment faulting and porewater advection in the Madeira Abyssal Plain. Earth planet. Sci. Letts, 73(2-4):398-406. Heat flow correlated with basement topography. Data modelling suggests that this is due both to the thermal conductivity contrast between sediments and basement and to the presence of hydrothermal circulation within basement highs. Non-linear temperature profiles in sediments covering basement highs suggest that the underlying circulation is causing an upward movement of porewater. No firm evidence shows that sediment faults act as preferred pathways for porewater advection. Dept. ~f Geol, Univ. of Sheffield, $3 7HF, UK.
D. SubmarineGeologyand Geophysics
been retained in the diatom oxygen isotope record throughout the section. An oxygen isotope stratigraphy and chronology are assigned. Inst. of Earth Sci., Acad. Sin., P.O. Box 23-59, Taipei, Taiwan,
D200. Gravity, geodesy, magnetism 85:7134 Joshima, Masato, 1984. III. Gravimetric survey in the GHS0--5 cruise [central Pacific]. Geol. Surv. Japan Cruise Rept, 20:23-34. Free-air gravity anomaly data are presented for the area bounded by 9°20"-10°30"N and 174010 "175 ° 10"W. Results are discussed briefly in terms of the region's physiography. Geol. Surv. of Japan, Ibaraki-ken, Japan. (fcs) 85:7135 Joshima, Masato and Akira Nishimura, 1984. X. Remanent magnetization of sediment cores in GHS0--5 survey area [central Pacific]. Geol. Surv. Japan Cruise Rept, 20:165-192. Geol. Surv. of Japan, Ibaraki-ken, Japan. 85:7136 Lanzerotti, L.J., L.V. Medford, C.G. Maclennan, D.J. Thomson, A. Meloni and G.P. Gregori, 1985. Measurements of the large-scale directcurrent Earth potential and possible implications for the geomagnetic dynamo. Science, 229(4708): 47-49. AT&T Bell Lab., Murray Hill, NJ 07974, USA. 85:7137 Ramaswamy, V., A.K. Agarwal and B.P. Singh, 1985. A three--dimensional numerical model study of electromagnetic induction around the Indian Peninsula and Sri Lanka Island. Phys. Earth planet. Interiors, 39(1):52-61. Agarwal: Indian Inst. of Geomag., Colaba, Bombay 400 005, India. 85:7138 Stone, D.B., 1985. Megaplates, microplates and paleomagnetism. J. Geornagn. Geoelect., 37(1): 147-152. Highlights of recent developments in paleomagnetic studies are referenced in this brief review. Emphasis is on (1) the continuing studies of the relative motions of the main continental (cratonic) blocks, (2) unravelling the history of allochthonous terranes, and (3) the problems of deviation of the geomagnetic field with respect to the spin axis of the Earth and its
OLR (I 985)32 ~121
bearings on paleogeography and climate. Geophys. Inst., Univ, of Alaska, Fairbanks, AK 99701, USA. (fcs)
85:7139 Tamaki, Kensaku and Masato Joshima, 1984. 11. Magnetic anomalies of the GH80-5 survey area in the central Pacific Basin. Geol. Surv. Japan Cruise Rept, 20:20-22. Geol. Surv. of Japan~ lbaraki-ken, Japan.
85:7140 Vincenz, S.A. and M. Jelenska, 1985. Paleomagnetic investigations of Mesozoic and Paleozoic rocks from Svalbard. Tectonophysics, 114(1-4): 163-180. A paleomagnetic study of Late Mesozoic dykes and sills and Paleozoic sediments from Spitsbergen gives the position of the pole in the Late Mesozoic and Paleozoic to the south of corresponding poles for Europe and North America. The data suggest that Svalbard has moved independently of Europe and North America at least in the Late Mesozoic, and thus might behave as a microplate or block. Dept. of Earth and Atmos. Sci., Saint Louis Univ., St. Louis, MO 63156-8099, USA.
D210. Heat flow 85:7141 Joshima, Masato, 1984. VI. Heat flow measurement in the GH80-5 area [8°30"-10°25"N and 173°40"-174°30"W]. Geol. Surv. Japan Cruise Rept, 20:53-66. Geol. Surv. of Japan, lbarakiken, Japan.
85:7142 Noel, Mark, 1985. Heat flow, sediment faulting and porewater advection in the Madeira Abyssal Plain. Earth planet. Sci. Letts, 73(2-4):398-406. Heat flow correlated with basement topography. Data modelling suggests that this is due both to the thermal conductivity contrast between sediments and basement and to the presence of hydrothermal circulation within basement highs. Non-linear temperature profiles in sediments covering basement highs suggest that the underlying circulation is causing an upward movement of porewater. No firm evidence shows that sediment faults act as preferred pathways for porewater advection. Dept. ~f Geol, Univ. of Sheffield, $3 7HF, UK.