The sedimentary imprint of Pleistocene glacio-eustasy; implications for global correlations of seismic sequences

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doi: 10.1130/GES01569.1
Author(s): McHugh, Cecilia M.; Fulthorpe, Craig S.; Hoyanagi, Koichi; Blum, Peter; Mountain, Gregory S.; Miller, Kenneth G.
Author Affiliation(s): Primary:
City University of New York, Queens College, School of Earth and Environmental Sciences, Flushing, NY, United States
Other:
University of Texas at Austin, United States
Shinshu University, Japan
Texas A&M University, United States
Rutgers University, United States
Volume Title: Geosphere (Boulder, CO)
Source: Geosphere (Boulder, CO), 14(1), p.265-285. Publisher: Geological Society of America, Boulder, CO, United States. ISSN: 1553-040X
Note: In English. 77 refs.; illus., incl. sects., 3 tables, sketch maps
Summary: We evaluate lithofacies, chronology, and seismic sequences from the Canterbury Basin, New Zealand passive continental slope (Integrated Ocean Drilling Program [IODP] Expedition 317 Site U1352 and environs) and compare this with slope sequences from the New Jersey passive margin. Our goal is to understand continental slope sedimentation in response to glacio-eustasy and test the concepts of sequence stratigraphy. High-resolution geochemical elemental and lithostratigraphic analyses were calibrated to a chronology constructed from benthic foramininferal oxygen isotopes for the past ∼1.8 m.y. We identify lithofacies successions by their unique geochemical and lithologic signature and correlate them with marine isotope stages (MIS) at Milankovitch 100 k.y. (MIS 1-12) and 41 k.y. (MIS 13-63) periods. Eight seismic sequence boundaries (U13-U19) were identified from high-resolution multichannel seismic data, providing a seismic stratigraphic framework. Except for MIS 1-5 and MIS 54-55, there are 2-16 MIS stages and a comparable number of lithofacies contained within each seismic sequence, indicating that it took one to several glacio-eustatic cycles to build each seismic stratigraphic sequence. These findings support prior results obtained by the Ocean Drilling Program (ODP) Leg 174A on the New Jersey continental slope. On both margins, there is a strong correlation between seismic sequences, lithofacies, and MIS, thus linking them to glacio-eustasy. However, the correlation between MIS and seismic sequences is not one-to-one, and Pleistocene seismic sequences on the two margins are not synchronous. Local conditions, including differences in sedimentation rates and creation of accommodation space, strongly influenced sediment preservation at each location, revealing that high-frequency Pleistocene seismic sequences need not correlate globally.
Year of Publication: 2018
Research Program: IODP Integrated Ocean Drilling Program
ODP Ocean Drilling Program
Key Words: 20 Geophysics, Applied; 24 Surficial Geology, Quaternary Geology; Alkaline earth metals; Atlantic Ocean; Australasia; Ca/Ti; Calcium; Calcium carbonate; Canterbury Basin; Cenozoic; Chemostratigraphy; Continental slope; Cores; Correlation; Expedition 317; Geophysical methods; Geophysical profiles; Geophysical surveys; Grain size; IODP Site U1352; Integrated Ocean Drilling Program; Isotope ratios; Isotopes; Leg 174A; Lithofacies; Lithostratigraphy; Marine sediments; Metals; New Jersey; New Zealand; North Atlantic; Northwest Atlantic; O-18/O-16; ODP Site 1073; Ocean Drilling Program; Oxygen; Pacific Ocean; Pleistocene; Quaternary; Sea-level changes; Sedimentation; Sedimentation rates; Sediments; Seismic methods; Seismic profiles; Seismic stratigraphy; South Island; South Pacific; Southwest Pacific; Sr/Ca; Stable isotopes; Strontium; Surveys; Titanium; United States; West Pacific
Coordinates: S445615 S445615 E1720122 E1720122
N391331 N391331 W0721633 W0721633
Record ID: 2018036968
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