In accordance with SO #3423 - The Gulf of America and SO #3424 - Mount McKinley and Landmarks Honoring the Alaskan People, new USGS data releases specific to those named places will utilize the new name Gulf of America and the restored name Mount McKinley. Per USGS practice, historical data will retain the name of the geographic features as they were known at the time the data were originally released.
Data Release
Globorotalia truncatulinoides Trace Element Geochemistry (Barium, Magnesium, Strontium, Manganese, and Calcium) From the Gulf of Mexico Sediment Trap
By Caitlin E. Reynolds,1 Julie N. Richey,1 Jennifer S. Fehrenbacher,2 Catherine V. Davis,3 and Howard J. Spero4
1 US Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg FL, 33701, USA
2 Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, 97331, USA
3 North Carolina State University, Department of Marine, Earth, and Atmospheric Sciences, Raleigh, NC, 27605, USA
4 University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, 95616, USA
Summary
Observations of elevated barium-to-calcium ratio (Ba/Ca) in Globorotalia truncatulinoides have been attributed to contaminant phases, deep calcification depth and diagenetic processes. U.S. Geological Survey (USGS) scientists and their collaborators investigated intra- and inter-test Ba/Ca variability in the non-spinose planktic foraminifer, G. truncatulinoides, from a sediment trap time series (2009-2017) in the northern Gulf of Mexico (generally 27.5 °N and 90.3 °W) to gain insights into the environmental influences on barium enrichment in this and other non-spinose species. Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) was used to differentiate between the elemental composition of the crust and lamellar calcite in non-encrusted (< 150 meters [m] calcification depth) and encrusted (> 250 meters calcification depth) specimens of G. truncatulinoides.
For further information regarding data collection, processing methods, and/or results and interpretive study refer to Richey and others, 2022.
Richey, J.N., Fehrenbacher, J.S., Reynolds, C.E., Davis, C.V., and Sperod, H.J., 2022, Barium enrichment in the non-spinose planktic foraminifer, Globorotalia truncatulinoides: Geochimica et Cosmochimica Acta, https://doi.org/10.1016/j.gca.2022.07.006.
Data
| File Name and Description | Metadata (XML format) | Metadata (text format) | Download File |
|---|---|---|---|
| Non-Encrusted_Gtrunc_Reproducibility.zip LA-ICP-MS replicate chamber study on non-encrusted G. truncatulinoides (.csv, .xlsx) |
Gtrunc_trace_element_ geochemistry_metadata.xml |
Gtrunc_trace_element_ geochemistry_metadata.txt |
Non-Encrusted_ Gtrunc_Reproducibility.zip (65 KB) |
| Encrusted_Gtrunc_Reproducibility.zip LA-ICP-MS replicate chamber study on encrusted G. truncatulinoides (.csv, .xlsx) |
Same as above | Same as above | Encrusted_Gtrunc_ Reproducibility.zip (54 KB) |
| Solution_Geochemistry.zip Solution based Ba/Ca on multiple planktic foraminifer species (.csv, .xlsx) |
Same as above | Same as above | Solution_Geochemistry.zip (60 KB) |
| Non-Encrusted_AVG_Gtrunc_Geochemistry.zip Weighted Mg/Ca, Ba/Ca, Mn/Ca, and Sr/Ca for non-encrusted G. truncatulinoides (.csv, .xlsx) |
Same as above | Same as above | Non-Encrusted_AVG_ Gtrunc_Geochemistry.zip (156 KB) |
| Encrusted_AVG_Gtrunc_Geochemistry.zip Weighted homogenous zone Mg/Ca, Ba/Ca, Mn/Ca, and Sr/Ca for encrusted G. truncatulinoides (.csv, .xlsx) |
Same as above | Same as above | Encrusted_AVG_ Gtrunc_Geochemistry.zip (55 KB) |
| Water_Column_Geochemistry.zip Water column profile raw and calculated geochemistry (.csv, .xlsx) |
Same as above | Same as above | Water_Column_Geochemistry.zip (56 KB) |
| Mean_Orbulina_Geochemistry.zip Raw and calculated O. universa geochemistry (.csv, .xlsx) |
Same as above | Same as above | Mean_Orbulina_Geochemistry.zip (108 KB) |
| All_Gtrunc_Geochemistry.zip Raw LA-ICP-MS G. truncatulinoides geochemistry (.csv, .xlsx) |
Same as above | Same as above | All_Gtrunc_Geochemistry.zip (23.5 MB) |
Figure 1. Location of the Sediment Trap Mooring in the northern Gulf of Mexico at approximately 27.5 °N and 90.3 °W.
Suggested Citation
Reynolds, C.E., Richey, J.N., Fehrenbacher, J.S., Davis, C.V., and Spero, H.J., 2022, Globorotalia truncatulinoides trace element geochemistry (barium, magnesium, strontium, manganese, and calcium) from the Gulf of Mexico sediment trap: U.S. Geological Survey data release, https://doi.org/10.5066/P9YQMIH5.