Mallinson, David J. and Compton, John S. (1997): Linking phosphogenic episodes on the Southeast U.S. margin to marine delta (super 13) C and delta (super 18) O records
Leg/Site/Hole:
Related Expeditions:
DSDP 90
Identifier:
ID:
1997-020210
Type:
georefid
ID:
10.1130/0091-7613(1997)025<0103:LPEOTS>2.3.CO;2
Type:
doi
Creator:
Name:
Mallinson, David J.
Affiliation:
University of South Florida, Department of Marine Science, St. Petersburg, FL, United States
Role:
author
Name:
Compton, John S.
Affiliation:
Role:
author
Identification:
Title:
Linking phosphogenic episodes on the Southeast U.S. margin to marine delta (super 13) C and delta (super 18) O records
Year:
1997
Source:
Geology (Boulder)
Publisher:
Geological Society of America (GSA), Boulder, CO, United States
Volume:
25
Issue:
2
Pages:
103-106
Abstract:
The relative abundance of phosphorite as a function of age was estimated for the southeastern United States using (super 87) Sr/ (super 86) Sr derived ages. The Sr-derived ages define seven phosphogenic episodes on the northeast Florida platform. Phosphorus burial rate estimates for the southeastern United States margin range from 2 to 12X10 (super 9) mol.P.yr (super -1) , and phosphorus accumulation rates range from 1 to 3 mu mol.cm (super -2) . yr (super -1) , similar to modern phosphogenic margins. The estimated amount of organic carbon burial ranges from 1 to 12X10 (super 16) mol C; sufficient to shift the ocean delta (super 13) C by 0.1% to 0.6%. On long time scales (>1 m.y.) phosphogenesis in the southeastern United States corresponds to increased organic carbon burial (positive delta (super 13) C shifts) and rising sea level (negative delta (super 18) O shifts). On shorter time scales (<1m.y.), the correlation of phosphogenesis to positive delta (super 13) C and delta (super 18) O shifts suggests a different relation between phosphogenesis, organic carbon burial, eustasy, and climate transitions during the Miocene.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:30.3000 West:-81.3000 East:
161.1336 South:-26.0642
Keywords: Isotope geochemistry; Sedimentary petrology; Oceanography; absolute age; Atlantic Coastal Plain; Atlantic Ocean; burial diagenesis; C-13/C-12; carbon; Cenozoic; chemically precipitated rocks; continental margin sedimentation; continental shelf; cores; dates; Deep Sea Drilling Project; diagenesis; DSDP Site 588; Eastern U.S.; Florida; francolite; Hawthorn Formation; IPOD; isotope ratios; isotopes; Leg 90; Lord Howe Rise; marine environment; marine sediments; Miocene; Neogene; North Atlantic; northeastern Florida; Northwest Atlantic; O-18/O-16; oxygen; Pacific Ocean; phosphate rocks; phosphates; phosphorus; sedimentary rocks; sedimentation; sedimentation rates; sediments; shelf environment; South Pacific; Southeastern U.S.; Southwest Pacific; Sr/Sr; stable isotopes; terrestrial environment; Tertiary; United States; West Pacific;
.