Calibration between eustatic estimates from backstripping and oxygen isotopic records for the Oligocene

Online Access: Get full text
doi: 10.1130/0091-7613(2002)030<0903:CBEEFB>2.0.CO;2
Author(s): Pekar, Stephen F.; Christie-Blick, Nicholas; Kominz, Michelle A.; Miller, Kenneth G.
Author Affiliation(s): Primary:
Lamont-Doherty Earth Observatory, Palisades, NY, United States
Other:
Western Michigan University, United States
Rutgers University, United States
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 30(10), p.903-906. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. Lamont-Doherty Earth Obs., Contrib. No. 6350. 28 refs.; illus., incl. 1 table
Summary: Eustatic estimates from the backstripping of Oligocene sections are compared quantitatively with δ18O data. Each of the nine Oligocene δ18O events (maxima) identified in previous studies correlates with a stratigraphically determined sea-level lowstand. Oxygen isotopic records from planktonic foraminifers from western equatorial Atlantic Ocean Drilling Program (ODP) Site 929 indicate an isotopic increase of 0.16ppm per 10 m decrease in the depth of the ocean (apparent sea level, ASL). Amplitudes of ASL change also correlate with moderate- and high-resolution benthic foraminiferal δ18O records from ODP Sites 803 (western tropical Pacific) and 929 and from Deep Sea Drilling Project (DSDP) Site 522 (South Atlantic Ocean), with an isotopic change of 0.22ppm per 10 m of ASL change (r2 = 0.807 and 0.960, respectively), and with records from ODP Site 689 (Southern Ocean; 0.13ppm per 10 m of ASL change; r2 = 0.704). This correlation suggests that Southern Ocean deep-water temperature changes were smaller than tropical sea-surface temperature changes between million year-scale glacials and interglacials. It also suggests that the deep-sea Southern Ocean records may provide the best means to calibrate sea level to oxygen isotopes.
Year of Publication: 2002
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Angola Basin; Antarctic Ocean; Atlantic Ocean; Backstripping; Benthic taxa; Biochemistry; Calibration; Cenozoic; Continental margin; Correlation; DSDP Site 522; Deep Sea Drilling Project; Equatorial Atlantic; Equatorial Pacific; Eustasy; Foraminifera; Geochemistry; IPOD; Invertebrata; Isotope ratios; Isotopes; Leg 113; Leg 130; Leg 154; Leg 73; Microfossils; New Jersey; North Atlantic; Northwest Atlantic; O-18/O-16; ODP Site 689; ODP Site 803; ODP Site 929; Ocean Drilling Program; Oligocene; Oxygen; Pacific Ocean; Paleogene; Planktonic taxa; Protista; Sea-level changes; South Atlantic; Stable isotopes; Tertiary; United States
Coordinates: N390000 N403000 W0733000 W0743000
S643101 S643100 E0030600 E0030559
S260651 S260650 W0050646 W0050647
N055834 N055834 W0434423 W0434423
N022559 N022601 E1603229 E1603227
Record ID: 2002075309
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States