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南中国海北部,在马尼拉海沟向海一侧的缓坡上,一大片(约25000平方公里)迁移型的沉积物波平行沟底延伸了约450公里,并延展到沟底之上900米的沟壁上。波长范围为200米—5公里,振幅5—50米。波的内部结构通常指示上倾迁移。这些波具有世界上其它地区由温盐(等深)流造成的迁移波的共同特征。然而在南中国海,这些波的区域位置和沉积物,以及南中国海盆等深流活动明显缺乏,表明这些波可能是由浊流造成的,或与沿马尼拉海沟底向南运动的顺波流有关。因此,这些沉积物波证明了顺坡的重力诱导流可产生区域性迁移型波区,这种波在地貌上与温盐诱导等深流沉积物波完全相同。
On the gentle side of the Manila trench to the sea side of the northern South China Sea, a large (about 25,000 square km) migratory sediment wave extends parallel to the base of the ditch for about 450 km and extends to a ditch of 900 m above the ditch Wall. Wavelength range of 200 meters -5 km, amplitude 5-50 meters. The internal structure of waves usually indicates upward migration. These waves have the common characteristics of migrating waves caused by warm salt (isobath) flow in other parts of the world. However, in the South China Sea, the clear absence of deep-sea currents such as the regional locations and sediments of these waves and the South China Sea indicates that these waves may be caused by turbidity currents or with the smoothing of the southward movement along the bottom of the Manila trench related. Therefore, these sedimentary waves demonstrate that gravity-induced flow along the slope can produce a regional migration-type wave zone that is geomorphically identical to the deep-sea sediment waves induced by temperature and salt.