海洋地质前沿2017，Vol.33Issue(8)：18-23,6.DOI:10.16028/j.1009-2722.2017.08003
南海东北部澎湖峡谷群沉积特征
DEPOSITIONAL CHARACTERISTICS OF THE PENGHU SUBMARINE CANYON IN THE NORTHEASTERN SOUTH CHINA SEA
摘要
Abstract
Submarine canyons,a kind of elongated,narrow and deep negative reliefs,are common at active or passive continental margins.The Penghu submarine canyons are characterized by large slope and complex landform.High resolution single-channel 2-D seismic data are used in this paper to identify submarine canyons.Data shows that the canyons are generally in" V" shape or" U" shape,or "U" shape with a wide bottom in seismic profiles.Strong erosional features are commonly observed in the upper reaches of the canyons.There secondary grooves and slope gullies without sediment infilling are quite common.The formation of the Penghu submarine canyons is related to the sea level change during the late Quaternary.In the low water stage,the shelf was widely exposed to air and deposition occurred only in the area out of the shelf or even on the upper slope.Active gravity flow contributed to the formation of the submarine canyons.关键词
澎湖海底峡谷/沉积物波/重力流/滑塌Key words
Penghu submarine canyons/sediment waves/gravity flow/collapse分类
海洋科学引用本文复制引用
聂鑫,罗伟东,周娇..南海东北部澎湖峡谷群沉积特征[J].海洋地质前沿,2017,33(8):18-23,6.基金项目
国土资源部海底矿产资源重点实验室项目(KLMMR-2014-A-13) （KLMMR-2014-A-13）
中国地质调查局项目(1212011220115) （1212011220115）
