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Biogenic Sedimentation Patterns in the Northern South China Sea: An Ultrahigh-Resolution Record MD972148 of the Past 150,000 Years from the IMAGESⅢ-IPHIS Cruise

南中國海北部之生物源沈積變化型式:IMAGES第三航次(IPHIS)之過去十五萬年極高解析度記錄MD972148

並列摘要


High-resolution carbonate stratigraphy of the deep-sea core MD972151from the southwestern South China Sea shows millennial-scale variabilitysimilar to oxygen isotopic fluctuations recorded in ice cores from Greenland.In a long term of glacial-interglacial scale,carbonate contents in the interglacialtime(up to 25% by weight)were higher than that in the glacialperiods(5-15% by weight).Even for the last glacial,carbonate contentsare relatively high in the interstadial events and low in the stadial horizons.This demonstrates clearly that carbonate content in the continental slopeabove the lysocline in the southwestern South China Sea is primarily controlled by dilution of terrigenous inputs,which in turn is due to sea-levelfluctuations in response to changes of ice volume in high latitude regions.

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