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东马里亚纳海盆的钴探结果和地震反射资料可用于确定可能为侏罗纪的盆地中存在的巨厚沉积物(≥1200米)。绝大部分再沉积物质来自周围的海山及洋壳的深处(≥6900米)。在0—590米范围内绝大部分是深海沉积物,火山成因的和浅水的碳酸盐浊积物出现在中段(590-893米),其下部厚度≥300米的沉积物未取样。洋壳的巨大深度表明,该海区具有特殊的沉降史,或者说现今的模式不适合解释这一时代洋壳的状况。
Cobalt exploration results and seismic reflection data from the Eastern Mariana Basin can be used to determine the presence of large deposits (≥ 1200 m) in Jurassic basins. The vast majority of redeposited material comes from the depths of seamounts and oceanic crust (≥6900 meters). Most of the sediments in the range of 0-590 m are deep-sea sediments. Volcanic-facies and shallow-water carbonate turbidites appear in the middle section (590-893 m) and the sediments below 300 m in thickness are not sampled. The immense depth of the oceanic crust indicates that this area has a special history of subsidence or that the current model is not suitable for explaining the condition of the oceanic crust in this age.