| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5162079 | Organic Geochemistry | 2015 | 10 Pages |
Abstract
Similar isotopic trends are observed at both localities. The magnitude of the negative carbon isotope excursion at Cicogna is â¼2.5â°. Pre-event 2H enrichment recorded in the Forada section is missing at Cicogna, likely due to a disturbed interval at the Paleocene-Eocene boundary. A 2H depletion of â¼10-15â° during the body of the PETM at Cicogna is observed in several PETM sections, implicating a primary change in the global hydrological cycle. Given the proximity of Cicogna and Forada, isotopic compositions of paleo-meteoric water are expected to be similar. However, a â¼15â° offset between the records is apparent. Possible reasons include differences in vegetation, biomarker transport and precipitation altitude, underscoring the complexity of using a single record for zonal reconstructions and data model comparisons. Ultimately, this study shows that while 2H/1H trends can be applied for paleoclimate analysis with reasonable certainty, absolute magnitudes can be biased by secondary local factors.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Srinath Krishnan, Mark Pagani, Claudia Agnini,