Physics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..78..271g&link_type=abstract
Earth and Planetary Science Letters, Volume 78, Issue 2-3, p. 271-287.
Physics
10
Scientific paper
The Holocene (10,000 yr B.P.) Mid-Atlantic Ridge sedimentary regime between 45°N and 65°N has been investigated by examination of sediments from 70 cores. Smectite, chlorite and quartz, 87Sr/86Sr isotopes and REE have been used as conservative tracers to provide source identification and to calculate accumulation rates. The entire Holocene sedimentary regime in this part of the Atlantic can be attributed to particle fluxes from two sources: the Icelandic and North American systems. Two main transport mechanisms are identified:
(1)|Particles derived from the Icelandic system have been transported southwards, as far as 45°N, by bottom currents.
(2)|Material coming from North America is mainly transported by the aeolian regime. At 45°N, the windborn accumulation rate is estimated to be 0.5 g cm-2 kyr-1, which is identical to the accumulation rate of bottom-advected material from Iceland. Finally, a diagnostic model for the North Atlantic sedimentary regime is proposed.
Chesselet Roger
Grousset Francis E.
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