Messinian deep-water turbidites and glacioeustatic sea-level changes in the North Atlantic: linkage to the Mediterranean salinity crisis
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文摘
Benthic foraminiferal data indicate eight layers of deep-water turbidities during the Messinian and one in the early Pliocene in ODP Leg 105, Site 646B. It is suggested that these turbidites were deposited during sea-level low stands, and their ages are tentatively correlated to 6.59, 6.22, 6.01, 5.89, 5.75, 5.7, 5.65, 5.60, and 5.55 Ma, respectively, based on the Messinian oxygen isotope enrichments at Site 552A of DSDP Leg 81. The turbidite layers during the late Messinian, coeval with frequent climate changes suggested by six oxygen enrichment excursions of Site 552A, may have been in part linked to the late Messinian evaporite deposits in the Mediterranean Basin.