Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5783217 | Geochimica et Cosmochimica Acta | 2017 | 44 Pages |
Abstract
We show that the biomarker signature of Upper Ordovician strata from Southampton and Baffin Island is compatible with that found in HLs in the Labrador Sea and North Atlantic, while the biomarker signature of other Paleozoic formations from the former margin of the Laurentide ice sheet is not. In addition to the biomarker signature, key-inorganic characteristics (δ18O, εNd, and 87Sr/86Sr ratios) of these formations from Southampton and Baffin Island are consistent with those reported from HLs. The location of these formations in and around the Hudson Strait is compatible with palaeo-ice flow regimes through the Hudson Strait, allowing for easy entrainment and rapid transport to the ocean. Based on these results we propose that these specific Upper Ordovician formations form a main source of IRD in HLs and hence infer an active role of the Hudson Strait paleo-ice flow in these events.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
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Authors
Jens Hefter, B. David A. Naafs, Shunxin Zhang,