Mineralogical and Geochemical Approaches to Provenance

Late glacial and deglacial history of ice rafting in the Labrador Sea: A perspective from radiogenic isotopes in marine sediments
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Published:May 01, 2012
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Greg E. Downing, Sidney R. Hemming, 2012. "Late glacial and deglacial history of ice rafting in the Labrador Sea: A perspective from radiogenic isotopes in marine sediments", Mineralogical and Geochemical Approaches to Provenance, E. Troy Rasbury, Sidney R. Hemming, Nancy R. Riggs
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The late glacial and deglacial history of the Southeastern Laurentide Ice Sheet involves the southward advance and subsequent northward retreat from southeastern Canada and the northeastern United States. Superposed on this advance and retreat are three major ice-rafting events associated with Heinrich events 2 and 1 (H2 and H1) and the Younger Dryas. Nd, Sr, and Pb isotopes were measured on the 63–150 μm, de-carbonated marine sediment for the period 24–10.5 14C ka, from marine sediment core EW9303-GGC31, collected from the top of Orphan Knoll, a topographic high 550 km northeast of Newfoundland, Canada. In general, one of the...
- alkaline earth metals
- amphibole group
- Ar/Ar
- Atlantic Ocean
- Cenozoic
- chain silicates
- clinoamphibole
- cores
- data integration
- deglaciation
- geochemical indicators
- geochemistry
- glacial geology
- glaciation
- Heinrich events
- hornblende
- ice movement
- ice rafting
- isotope ratios
- isotopes
- Labrador Sea
- Laurentide ice sheet
- lead
- marine sediments
- metals
- Nd-144/Nd-143
- neodymium
- North Atlantic
- Pb-206/Pb-204
- Pb-207/Pb-204
- Pb-208/Pb-204
- Pleistocene
- provenance
- Quaternary
- radioactive isotopes
- rare earths
- sediments
- silicates
- Sr-87/Sr-86
- stable isotopes
- strontium
- upper Pleistocene
- upper Weichselian
- Weichselian
- Younger Dryas
- Orphan Knoll