SEISMOLOGICAL DETECTION OF A MANTLE PLUME

被引:77
作者
NATAF, HC
VANDECAR, J
机构
[1] ECOLE NORMALE SUPER,DEPT TERRE ATMOSPHERE OCEAN,F-75231 PARIS 05,FRANCE
[2] UNIV WASHINGTON,GEOPHYS PROGRAM,SEATTLE,WA 98195
关键词
D O I
10.1038/364115a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A detailed seismological study of the mantle beneath the Bowie hotspot, west of Canada, reveals a zone of low seismic velocities. The anomaly, probed at a depth of approximately 700 km, adds a delay of 0.15 s to the travel times of seismic waves traversing a region approximately 150 km In diameter, located approximately 150 km away from the vertical projection of the Bowie seamount. This observation suggests that a mantle plume is present in the lower mantle beneath Bowie, with the amplitude of the anomaly implying a temperature contrast of about approximately 300 K.
引用
收藏
页码:115 / 120
页数:6
相关论文
共 33 条
  • [1] Anderson D.L., 1989, THEORY EARTH
  • [2] BOSTOCK MG, 1993, B SEISMOL SOC AM, V83, P756
  • [3] SLAB PENETRATION INTO THE LOWER MANTLE
    CREAGER, KC
    JORDAN, TH
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH, 1984, 89 (NB5): : 3031 - 3049
  • [4] OCEAN BATHYMETRY AND MANTLE CONVECTION .1. LARGE-SCALE FLOW AND HOTSPOTS
    DAVIES, GF
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1988, 93 (B9): : 10467 - 10480
  • [5] DUNCAN RA, 1985, OCEAN BASIN MARGIN, V7, P89
  • [6] ROBUST ESTIMATION OF GEOMAGNETIC TRANSFER-FUNCTIONS
    EGBERT, GD
    BOOKER, JR
    [J]. GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 87 (01): : 173 - 194
  • [7] YELLOWSTONE - SEISMIC EVIDENCE FOR A CHEMICAL MANTLE PLUME
    HADLEY, DM
    STEWART, GS
    EBEL, JE
    [J]. SCIENCE, 1976, 193 (4259) : 1237 - 1239
  • [8] Hirahara K., 1977, Journal of Physics of the Earth, V25, P393, DOI 10.4294/jpe1952.25.393
  • [9] Huber PJ, 1981, ROBUST STATISTICS
  • [10] A TOMOGRAPHIC IMAGE OF MANTLE STRUCTURE BENEATH SOUTHERN-CALIFORNIA
    HUMPHREYS, E
    CLAYTON, RW
    HAGER, BH
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1984, 11 (07) : 625 - 627