Late Quaternary Mediterranean sapropels II. Organic geochemistry and palynology of S1 sapropels and associated sediments
نویسندگان
چکیده
منابع مشابه
Eastern Mediterranean surface water temperatures and DO composition during deposition of sapropels in the late Quaternary
[1] Water column stratification increased at climatic transitions from cold to warm periods during the late Quaternary and led to anoxic conditions and sapropel formation in the deep eastern Mediterranean basins. Highresolution data sets on sea-surface temperatures (SST) (estimated from U37 k0 indices) and dO of planktonic foraminifer calcite (dOfc) across late Pleistocene sapropel intervals sh...
متن کاملNeogene sapropels in the Mediterranean: a review
For 50 years the existence of sapropels (organic-carbon-rich sediments) deposited within Plio–Pleistocene sediments of the Mediterranean Sea has been known. Initially, research concentrated on material recovered in relatively short gravity=piston cores taken from the eastern basins where sequences were found to be well developed=preserved and had extensive spatial coverage. In the main, previou...
متن کاملDiagenetic magnetic enhancement of sapropels from the eastern Mediterranean Sea
Diagenetic dissolution of magnetic minerals has been widely observed in organic-rich sediments from many environments. Organic-rich sediments from the eastern Mediterranean Sea (sapropels), recovered during Leg 160 of the Ocean Drilling Program, reveal a surprising catalogue of magnetic properties. Sapropels, from all sites studied across the eastern Mediterranean Sea, are strongly magnetic and...
متن کاملOligotrophy and nitrogen fixation during eastern mediterranean sapropel events
Nitrogen isotopic measurements in fossil chlorophyll from late Pleistocene organic-rich sediments (sapropels) in the eastern Mediterranean Sea provide geochemical evidence for stratified, nutrient-depleted surface water and extensive nitrogen fixation. This evidence is reconciled with previous indications of high productivity by invoking a model of sapropel formation in which increased river di...
متن کاملSedimentology and Geochemistry of Quaternary Sediments in Saghalak-Sar wetland of Rasht
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ژورنال
عنوان ژورنال: Chemical Geology
سال: 1987
ISSN: 0009-2541
DOI: 10.1016/0009-2541(87)90160-4