Climate forcing of terrigenous sediment input to the central Mediterranean Sea since the early Pleistocene

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doi: 10.1016/j.palaeo.2015.11.006
Author(s): Zhao Yulong; Colin, Christophe; Liu Zhifei; Bonneau, Lucile; Siani, Giuseppe
Author Affiliation(s): Primary:
Tongji University, State Key Laboratory of Marine Geology, Shanghai, China
Other:
Université Paris-Sud, Laboratoire Géosciences Paris Sud, France
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.442, p.23-35. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 32 refs.; illus., incl. sketch map
Summary: Clay mineralogy of ODP Site 964 in the Ionian Sea was investigated in order to reconstruct variations in detrital sediment input to the central Mediterranean Sea and to reconstruct the corresponding climatic processes over the last 1500 kyr. The clay mineralogy of ODP Site 964 indicates a major shift in sedimentary sources from the Saharan Desert, which is characterized by a clay mineral assemblage of palygorskite-illite-kaolinite, to the Apennine Peninsula, characterized by an illite-smectite clay assemblage, at ∼ 700 kyr. Prior to ∼ 700 kyr, the low smectite content (10-20%) and the strong precessional cycles in the variations of kaolinite, illite and palygorskite indicate that terrigenous sediment to the central Mediterranean Sea mainly originated from Saharan dust and was strongly affected by the African monsoon, with a minor contribution of sediment deriving from the Apennine Peninsula. An increase in the illite/kaolinite ratio in the maxima of boreal summer insolation indicates a decreased dust input from the southern Sahara as a result of the northward displacement of the African Monsoon-ITCZ system. A gradual increase in smectite content has been identified between 1050 and 500 kyr, probably associated with environmental (vegetation) and/or hydrological changes in southern Europe linked to the occurrence of the MPT, and partly to tectonic uplift in the Apennine Peninsula. A marked increase in terrigenous flux is observed at around 350 kyr, coeval with a major phase of uplift in the Calabrian Arc. Abstract Copyright (2016) Elsevier, B.V.
Year of Publication: 2016
Research Program: ODP Ocean Drilling Program
Key Words: 06 Petrology, Sedimentary; 24 Surficial Geology, Quaternary Geology; Africa; Alkaline earth metals; Atlantic Ocean; Cape Verde Rise; Carbonates; Cenozoic; Central Mediterranean Sea; Chlorite; Chlorite group; Clay mineralogy; Clay minerals; Climate; Climate change; Climate forcing; East Mediterranean; Foraminifera; Globigerina; Globigerina bulloides; Globigerinacea; Globigerinidae; Holocene; Illite; Insolation; Invertebrata; Ionian Sea; Isotope ratios; Isotopes; Kaolinite; Leg 108; Leg 160; Lower Pleistocene; Marine sediments; Mediterranean Ridge; Mediterranean Sea; Metals; Middle Pleistocene; Mineral assemblages; North Atlantic; O-18/O-16; ODP Site 659; ODP Site 964; ODP Site 967; ODP Site 971; Ocean Drilling Program; Oxygen; Paleoclimatology; Palygorskite; Planktonic taxa; Pleistocene; Protista; Quaternary; Rotaliina; Sahara; Sediments; Sheet silicates; Silicates; Smectite; Sr-87/Sr-86; Stable isotopes; Strontium; Terrigenous materials; Transport; Upper Pleistocene; Wind transport
Coordinates: N180437 N183438 W0210134 W0210135
N361538 N361538 E0174500 E0174500
N340411 N340411 E0324331 E0324331
Record ID: 2016046307
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands