Recent processes of levee formation on the Zaire deep-sea fan

详细信息    查看全文

• 作者：Gervais ; Anne ; Mulder ; Thierry ; Savoye ; Bruno ; Migeon ; Sé ; bastien ; Cremer ; Michel
• 关键词：Zaire ; deep sea fan ; turbiditic levee ; fine-grained turbidites ; deposition rate ; spillover ; lamina ; Zaï ; re ; é ; ventail sous-marin profond ; levé ; e turbiditique ; turbidites fines ; taux de sé ; dimentation ; dé ; bordement ; lamine
• 刊名：Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science
• 出版年：2001
• 出版时间：March 30, 2001
• 年：2001
• 卷：332
• 期：6
• 页码：371-378
• 全文大小：559 K

文摘

Deposits observed in cores collected on the south levee of the active middle Zaire deep-sea fan are fine-grained turbidites containing abundant thin silt laminae, alternated with clay laminae. Each sequence represents successive spillover of the dilute upper part of a continuous channelised turbidity current. Pulsatory overflows create a low velocity (0.1 m·s⁻¹) overspill current on the levee with duration from a few days to a few weeks. Variations of the hydraulic regime within the overflow generate laminae.