深海扇(英语:abyssal fan),又称海底扇、如同陆上冲积扇外形,但它是由浊积流形成的沉积构造。深海扇的规模有很大差异,宽度从几公里到几千公里不等。最大的是孟加拉扇,其次是印度河扇,但主要扇也有在亚马逊刚果密西西比和其他地方的出口处发现[1][2][3]

浊积流一般形成在大陆架边缘,沿着大陆坡向下流动时系带大量沉积物。到了大陆坡底水流变慢。减少水流输送沉积物的能力,沉积其携带的颗粒,从而形成海底扇[3]

参考文献

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.