Age model, biogenic opal contents and sedimentary U/Th for sites J1002 and J1007, Chilean Margin

DOI

Sediment cores at sites J1002 and J1007 were collected from the Chilean Margin during D/V JOIDES Resolution Expedition 379T (JR100) in 2019. Sedimentary Green/Blue (G/B) ratio and sedimentary U/Th derived from natural gamma radiation data were collected during the expedition. We generated age models for sites J1002 and J1007 with radiocarbon dates and visual correlation of δ18O records of benthic foraminifera to the LR04 benthic stack. Measured biogenic opal contents and organic carbon contents were compared to the G/B to test the utility of G/B as a proxy for diatom productivity at Sites J1002 and J1007. Sedimentary U/Th was further used as a non-quantitative indicator of redox conditions of the sediments. Lastly, we calculated the opal mass accumulation rate (MAR) at Site J1007 over the last ~150,000 years. Laboratory measurements in this study were conducted in 2020 at Rutgers University.

Further funding: NETL Methane Hydrates Fellowship Program

Identifier
DOI https://doi.org/10.1594/PANGAEA.946044
Related Identifier References https://doi.org/10.1029/2022GC010350
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.946044
Provenance
Creator Li, Chen ORCID logo; Clementi, Vincent ORCID logo; Bova, Samantha C ORCID logo; Rosenthal, Yair ORCID logo; Childress, Laurel; Wright, James D ORCID logo; Jian, Zhimin
Publisher PANGAEA
Publication Year 2022
Funding Reference Ministry of Science and Technology of the People's Republic of China https://doi.org/10.13039/501100002855 Crossref Funder ID 2018YFE0202401 ; National Science Foundation https://doi.org/10.13039/100000001 Crossref Funder ID 1756241 https://www.nsf.gov/awardsearch/showAward?AWD_ID=1756241 Digging Deeper with the JR100: Extending high resolution paleoclimate records from the Chilean Margin to the Eemian
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 7 datasets
Discipline Earth System Research
Spatial Coverage (-75.687W, -46.072S, -73.666E, -36.542N)
Temporal Coverage Begin 2019-07-31T22:08:00Z
Temporal Coverage End 2019-08-13T16:30:00Z