Mathematics – Logic
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1281g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Issue 7, pp.1281-1292
Mathematics
Logic
12
Scientific paper
The Sr / Ca ratio and other parameters have been measured in fossil planktonic foraminifera from the Atlantic and Pacific Ocean basins in order to evaluate the Sr / Ca ratio of seawater during the last 75 million years. Results on well-preserved samples indicate that the ratio has increased to its present value by 10-15% during the Cenozoic, and that minima occurred between 55-45 Ma and 10-5 Ma, when the ratio was 15-25% less than at present. The long-term increase may reflect either decreasing deposition of aragonite with a high Sr / Ca ratio in shallow seas, or decreasing seafloor spreading rates and consequently decreasing hydrothermal supply of Ca during the Cenozoic. Other geologic evidence suggests that the Eocene minimum (near 50 Ma) may have resulted from increased aragonite sedimentation, while the Late Miocene minimum (between 10-5 Ma) may have been caused by an increased rate of seawater-basalt exchange when seafloor spreading rates increased on the East Pacific Rise near 10 Ma.
Bender Michael L.
Graham David W.
Keigwin Lloyd D. Jr.
Williams Douglas F.
No associations
LandOfFree
Strontium-calcium ratios in Cenozoic planktonic foraminifera does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strontium-calcium ratios in Cenozoic planktonic foraminifera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strontium-calcium ratios in Cenozoic planktonic foraminifera will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1023244