Control of the Mid-Atlantic ridge and the Gulf Stream on the Quaternary sedimentation on the Azores Plateau
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- 作者：Dennielou ; Bernard ; Auffret ; Gé ; rard A. ; Boelaert ; An ; Richter ; Thomas ; Garlan ; Thierry ; et. al.
- 关键词：Azores ; Mid-Atlantic ridge ; transform faults ; pelagic ; glacial periods ; contourite ; Gulf Stream ; Aç ; ores ; dorsale mé ; dio-Atlantique ; bassins transformants ; pé ; lagique ; pé ; riodes glaciaires ; contourite ; Gulf Stream
- 刊名：Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science
- 出版年：1999
- 出版时间：June 30, 1999
- 年：1999
- 卷：328
- 期：1
- 页码：831-837
- 全文大小：720 K
文摘
The Azores Plateau is characterized by very low sedimentary fluxes. These consist of pelagic oozes slightly diluted by volcanogenic material. Sedimentary processes are controlled by (1) current activity: during at least the last three glacial periods the Gulf Stream has winnowed fine particles at depth shallower than 1 500 m, (2) the sea-bottom morphology: Mid-Atlantic ridge ponds act as sediment traps. The lateral flux can represent up to 92 % of the infill.