Other
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..47..431l&link_type=abstract
Earth and Planetary Science Letters, Volume 47, Issue 3, p. 431-440.
Other
Scientific paper
Ferruginous mudstones and cherts occur in association with Ordovician basalts at the base of the pelagic sequence in the Southern Uplands of Scotland, an area which has recently been interpreted as a Lower Palaeozoic accretionary trench/fore-arc complex. Intimate contacts between the Fe-rich deposits and the basalts indicate contemporaneity between ocean-floor volcanism and metalliferous mud accumulation. This, together with a Ce-depleted REE analysis from a supra-basaltic sample, and impoverishment of the sediments in Al and Ti relative to normal pelagic clays, suggests a hydrothermal-exhalative origin for the deposits, analogous to that of metalliferous sediments from modern ocean basins and Mesozoic ophiolites.
Leggett J. K.
Smith Keith T.
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