Geochemical results for black shale samples from different Holes of ODP Site 1258
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , , , , , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
2017
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867169119837618176 |
|---|---|
| author | Wang, Xiangli Reinhard, Christopher T Planavsky, Noah J Owens, Jeremy D Lyons, Timothy W Johnson, Thomas M |
| author_facet | Wang, Xiangli Reinhard, Christopher T Planavsky, Noah J Owens, Jeremy D Lyons, Timothy W Johnson, Thomas M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In order to advance our understanding of the emerging chromium (Cr) isotope system as a paleoredox proxy, we measured the 53Cr/52Cr of black shales deposited before, during, and after Cretaceous Oceanic Anoxic Event 2 (OAE2). We observed a > 1 per mil coherent negative 53Cr/52Cr excursion and significant drawdown in Cr enrichments during OAE2 coincident with a large positive carbon isotope excursion. Our observed negative 53Cr/52Cr excursion during OAE2 is most easily linked to an increase in the ratio of euxinic to reducing conditions. Additional work on other OAE sections is needed to determine the spatial significance of this Cr isotope trend. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_873605 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemical results for black shale samples from different Holes of ODP Site 1258 Wang, Xiangli Reinhard, Christopher T Planavsky, Noah J Owens, Jeremy D Lyons, Timothy W Johnson, Thomas M 207-1258A; 207-1258B; 207-1258C; AGE; Carbon, organic, total; Chromium; Depth, composite; DRILL; Drilling/drill rig; Event label; Fraction; Inductively coupled plasma-mass spectroscopy (ICP-MS), Agilent, 7500-ce; Joides Resolution; Leg207; Molybdenum; North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label; Titanium; δ53Cr In order to advance our understanding of the emerging chromium (Cr) isotope system as a paleoredox proxy, we measured the 53Cr/52Cr of black shales deposited before, during, and after Cretaceous Oceanic Anoxic Event 2 (OAE2). We observed a > 1 per mil coherent negative 53Cr/52Cr excursion and significant drawdown in Cr enrichments during OAE2 coincident with a large positive carbon isotope excursion. Our observed negative 53Cr/52Cr excursion during OAE2 is most easily linked to an increase in the ratio of euxinic to reducing conditions. Additional work on other OAE sections is needed to determine the spatial significance of this Cr isotope trend. |
| title | Geochemical results for black shale samples from different Holes of ODP Site 1258 |
| topic | 207-1258A; 207-1258B; 207-1258C; AGE; Carbon, organic, total; Chromium; Depth, composite; DRILL; Drilling/drill rig; Event label; Fraction; Inductively coupled plasma-mass spectroscopy (ICP-MS), Agilent, 7500-ce; Joides Resolution; Leg207; Molybdenum; North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label; Titanium; δ53Cr |
| url | https://doi.org/10.1594/PANGAEA.873605 |