Heat flow measurements on the Lomonosov Ridge, Arctic Ocean
-
摘要: Heat flow was measured on the Lomonosov Ridge during the 5th Chinese National Arctic Expedition in 2012. To derive the time-temperature curve, resistivity data were transformed to temperature by the resistivity-temperature program. Direct reading and linear regression methods were used to calculate the equilibrium temperature, which were regressed against the depth of the probes in sediment to derive the geothermal gradient. Then, heat flow was calculated as the product of geothermal gradient and thermal conductivity of sediments. The heat flow values on the basis of the two methods were similar (i.e., 67.27 mW/m2 and 63.99 mW/m2, respectively). The results are consistent with the measurements carried out at adjacent sites. The age of the Lomonosov Ridge predicted by the heat flow-age model was 62 Ma, which is in accordance with the inference that the ridge was separated from Eurasia at about 60 Ma.Abstract: Heat flow was measured on the Lomonosov Ridge during the 5th Chinese National Arctic Expedition in 2012. To derive the time-temperature curve, resistivity data were transformed to temperature by the resistivity-temperature program. Direct reading and linear regression methods were used to calculate the equilibrium temperature, which were regressed against the depth of the probes in sediment to derive the geothermal gradient. Then, heat flow was calculated as the product of geothermal gradient and thermal conductivity of sediments. The heat flow values on the basis of the two methods were similar (i.e., 67.27 mW/m2 and 63.99 mW/m2, respectively). The results are consistent with the measurements carried out at adjacent sites. The age of the Lomonosov Ridge predicted by the heat flow-age model was 62 Ma, which is in accordance with the inference that the ridge was separated from Eurasia at about 60 Ma.
-
Key words:
- heat flow /
- geothermal gradient /
- Chinese National Arctic Expedition /
- Lomonosov Ridge
-
Bullard E C. 1954. The flow of heat through the floor of the Atlantic Ocean. Processing of the Royal Society of London A, 222(1150): 408-429 Embry A F. 2001. Counterclockwise rotation of the Arctic Alaska Plate: Best Available Model or Untenable Hypothesis for the Opening of the Amerasia Basin. Polarforschung, 68: 247-256 Forsyth D A, Mair J A. 1984. Crustal structure of the lomonosov ridge and the Fram and Makarov Basins near the north pole. Journal of Geophysical research, 89(B1): 473-481 Grantz A, Eittreim S, Dinter D A. 1979. Geology and tectonic development of the continental margin north of Alaska.Tectonophysics, 59: 263-291 Heezen B C, Ewing M. 1961.The Mid-ocean Ridge and its extension through the Arctic Basin. In: Raasch G O, ed. The Geology of the Arctic. Toronto: University of Toronto Press, 622-642 Hyndman R D, Erickson A J, VonHerzen R P. 1974. Geothermal measurement on DSDP Leg 26. In: Davies T A, Luyendyk B P, eds. Initial Reports of the Deep Sea Drilling Project 26. Washington: US Government Printing Office, 675-742 James R C, Margo H E, Bernard J C. 2006. Morphology and structure of the Lomonosov Ridge, Arctic Ocean. Geochemistry Geophysics Geosystems, 7(5), doi: 10.1029/2005GC001114 Jokat W, Kristoffersen Y, Rasmussen T M. 1992.Lomonosov ridge—A double-sided continental margin. Geology, 20: 887-890 Jokat W. 2005.The sedimentary structure of the Lomonosov Ridge between 88°N and 80°N. Geophysics, 163: 698-726 Karasik A M. 1968. Magnetic anomalies of the Gakkel Ridge and origin of the Eurasia Subbasin of the Arctic Ocean. Geologic Geophysics Methods Prospect, Arctic, 5: 8-19 Mair J A, Forsyth D A. 1982. Crustal structure of the Canada Basin near Alaska, the Lomonosov Ridge, and adjoining basins near the North Pole.Tectonophysics, 89: 239-254 Pfender M, Villinger H. 2002. Miniaturized data loggers for deep sea sediment temperature gradient measurements. Marine Geology, 186: 557-570 Pollack H N, Hurter S J, Johnson J R. 1993. Heat flow from the earth's interior: analysis of the global data set. Reviews of Geophysics, 31(3): 267-280 Pribnow D F C, Kinoshita M, Stein C A. 2000. Thermal Date Collection and Heat Flow Recalculations for Ocean Drilling Program Legs 101-180. Institute for Joint Geoscientific Research, GGA, Hannover, Germany, 120432. http://www-odp.tamu.edu/publications/heat flow [2000-10-6/2012-12-3] Ratcliffe E H. 1960. The thermal conductivities of ocean sediments. Journal of Geophysical Research, 65(5): 1535-1541 Rickwood F K. 1970. The Prudhoe Bay field...Proceedings by United States Geological Survey Under the joint Auspices of Pacific Section, American Association of Petroleum Geologists and Northern California Geological Society Stein C A, Stein S. 1992. A model for the global variation in oceanic depth and heat flow with lithospheric age. Nature, 359: 123-129 Sweeney J F. 1983. Evidence for the origin of the Canada Basin margin by rifting in the Early Cretaceous time. Journal of the Alaska Geological Society, 2: 17-23 Tailleur I L. 1969.Rifting speculation of the geology of Alaska's North Slope. Oil and Gas Journal, 67: 128-130 Taylor P T, Kovacs L C, Vogt P R, et al. 1981. Detailed aeromagnetic investigation of the Arctic Basin. Journal of Geophysical Research, 86: 6223-6333 Vogt P R, Taylor P T, Kovacs L C, et al. 1979. Detailed aeromagnetic investigations of the Arctic Basin. Journal of Geophysical Research, 84: 1071-1089 Wilson J T. 1963. Hypothesis of the Earth's behaviour. Nature, 198: 925-929 Xu Xing, Shi Xiaobin, LuoXianhu, et al. 2006. Data Processing Method of Marine Geothermal Measurement on the Northern Margin of the South China Sea. Geoscience, 20(3): 457-464
点击查看大图
计量
- 文章访问数: 1304
- HTML全文浏览量: 39
- PDF下载量: 1523
- 被引次数: 0