Crustal structure of Mauna Loa Volcano, Hawaii, from seismic refraction and gravity data
Crustal structure of Mauna Loa Volcano, Hawaii, from seismic refraction and gravity data
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来自地震折射和重力数据的夏威夷莫纳罗亚火山的地壳结构
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
R. Kovach
中科院分区：
文献类型：
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作者：
J. Zucca;D. Hill;R. Kovach
1978年10月，美国地质调查局建立了一个垂直于夏威夷岛科纳海岸的100公里长的地震折射剖面。对这些数据的分析沿着现有的重力数据表明，海洋地壳在岛屿水下侧翼下向陆地倾斜约3°，在科纳海岸下增加到8.5°。从深海到莫纳罗亚山山顶以下的地壳底部最大垂直偏转约为9公里。高速、高密度的岩石（Vp约为7.1 km/sec，密度约为2.9 gm/cm 3）构成了大部分的火山建筑物，并延伸到莫纳罗亚山北侧下方几公里的地表。数据还表明，一个细长的高速，高密度的身体平行于科纳海岸位于地表之下;这个身体可能代表一个灭绝的，埋藏的裂谷带。
abstract In October 1978, the U.S. Geological Survey established a 100-km-long seismic refraction profile normal to the Kona coast of Hawaii Island. Analysis of these data along with available gravity data suggest that the oceanic crust dips about 3° landward under the submerged flank of the island increasing to 8.5° under the Kona coast. Maximum vertical deflection of the base of crust from beneath the deep ocean to a point beneath the summit of Mauna Loa is about 9 km. High-velocity, high-density rocks ( Vp about 7.1 km/sec, density about 2.9 gm/cm 3 ) comprise the bulk of the volcanic edifice and reach to within a few kilometers of the surface beneath the north flank of Mauna Loa. The data also suggest that an elongate high-velocity, high-density body lies parallel to the Kona coast just below the surface; this body probably represents an extinct, buried rift zone.