Late Cretaceous–Quaternary Biomagnetostratigraphy of ODP Sites 1168, 1170, 1171, and 1172, Tasmanian Gateway

Stickley, Catherine E; Brinkhuis, Henk; McGonigal, Kristeen L; Chaproniere, George C H; Fuller, Myron L.; Kelly, Daniel Clay; Nürnberg, Dirk; Pfuhl, H. A.; Schellenberg, S. A.; Schoenfeld, J.; Schönfeld, Joachim; Suzuki, Nozomu; Touchard, Y.; Wei, Wüchang; Williams, Graham L.; Lara, Jair Israel Barrientos; Stant, S Audra

doi:10.2973/odp.proc.sr.189.111.2004

Cited by 55 publications

(91 citation statements)

References 1 publication

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“…Unfortunately, the "meters composite depth (mcd)" scale reported in the ODP Initial Reports volume does not extend below 115 mbsf at either "A" or "C" (Exon et al, 2001; Table 15). In addition, Stickley et al (2004) are not clear on how they handled the offset between "A" and "C", and only describe the "C" and "D" offset. Accordingly, the modeled section at 1171A utilizes the mbsf depth scale down to 250 m, yet the comparison with data includes some data from 1171C below 120 mbsf.…”

Section: Numerical Modeling Methodsmentioning

confidence: 92%

“…Ages, and thus the growth curves for each model column, were constrained using previously reported magnetoand biostratigraphic data (Stickley et al, 2004;Figs. S3 and S4); the time scale on which age assignments were made for Leg 189 is the same as used previously for bulk nannofossil ooze and chalks at Sites 590 and 807A (Berggren et al, 1995a,b).…”

Section: Study Sitesmentioning

confidence: 99%

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Calcium isotopic evidence for rapid recrystallization of bulk marine carbonates and implications for geochemical proxies

Fantle

2015

Geochimica et Cosmochimica Acta

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Section: Numerical Modeling Methodsmentioning

confidence: 92%

Section: Study Sitesmentioning

confidence: 99%

Calcium isotopic evidence for rapid recrystallization of bulk marine carbonates and implications for geochemical proxies

Fantle

2015

Geochimica et Cosmochimica Acta

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“…The sediment records from the continental blocks that constitute the southern part of the Tasmanian sill indicate that an abrupt increase in subsidence occurred at the end of the early Eocene (∼51 Ma) (33,34). This increase correlates to a seismic reflector that can be traced throughout the STR.…”

Section: Tectonic Reconstructions Of the Eocene Tasmanian Gatewaymentioning

confidence: 99%

Eocene cooling linked to early flow across the Tasmanian Gateway

Bijl

Bendle

Bohaty

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

265

337

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The warmest global temperatures of the past 85 million years occurred during a prolonged greenhouse episode known as the Early Eocene Climatic Optimum (52–50 Ma). The Early Eocene Climatic Optimum terminated with a long-term cooling trend that culminated in continental-scale glaciation of Antarctica from 34 Ma onward. Whereas early studies attributed the Eocene transition from greenhouse to icehouse climates to the tectonic opening of Southern Ocean gateways, more recent investigations invoked a dominant role of declining atmospheric greenhouse gas concentrations (e.g., CO 2 ). However, the scarcity of field data has prevented empirical evaluation of these hypotheses. We present marine microfossil and organic geochemical records spanning the early-to-middle Eocene transition from the Wilkes Land Margin, East Antarctica. Dinoflagellate biogeography and sea surface temperature paleothermometry reveal that the earliest throughflow of a westbound Antarctic Counter Current began ∼49–50 Ma through a southern opening of the Tasmanian Gateway. This early opening occurs in conjunction with the simultaneous onset of regional surface water and continental cooling (2–4 °C), evidenced by biomarker- and pollen-based paleothermometry. We interpret that the westbound flowing current flow across the Tasmanian Gateway resulted in cooling of Antarctic surface waters and coasts, which was conveyed to global intermediate waters through invigorated deep convection in southern high latitudes. Although atmospheric CO 2 forcing alone would provide a more uniform middle Eocene cooling, the opening of the Tasmanian Gateway better explains Southern Ocean surface water and global deep ocean cooling in the apparent absence of (sub-) equatorial cooling.

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“…The integrated stratigraphies of ODP holes near Tasmania (Stickley et al 2004) allow the age of Pleistocene nannofossil events at each site to be estimated and compared. At Subantarctic site 1171 the last occurrence of R. asanoi is a late Matuyama event similar in age to its accepted world ocean age of c. 0.9 Ma (Sato & Takayama 1992).…”

Section: Note In Proofmentioning

confidence: 99%

Pleistocene glaciomarine sediments of the Kisbee Formation, Wilson River, southwest Fiordland, and some tectonic and paleoclimatic implications

Turnbull

Sutherland

Beu

et al. 2007

New Zealand Journal of Geology and Geophysics

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Fossiliferous sediments of Kisbee Formation (new name) preserved in the Wilson River east of Puysegur Point, southwest Fiordland, are interpreted as filling a submarine canyon that was incised 160 m into Ordovician metasediments. The formation reflects deposition in quiet, deep cold water beneath floating ice, transitional into shallower water adjacent to an ice-marginal environment. The macrofauna and nannoflora indicate deposition within Castlecliffian time, somewhere between 0.5 and 1.2 Ma, at depths estimated to range between 50-150 and >200 m. A sequence of marine terraces adjacent to the Wilson River is correlated to global sea-level records, constraining the local uplift rate to 0.57 ± 0.04 mm/yr and the minimum age for Kisbee Formation to 0.69 Ma. If, as seems likely, the Matuyama-Brunhes paleomagnetic transition lies within the mapped section, Kisbee Formation is older than 0.78 Ma at the the base, and Limopsis lived in >200 m of water.

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Late Cretaceous–Quaternary Biomagnetostratigraphy of ODP Sites 1168, 1170, 1171, and 1172, Tasmanian Gateway

Cited by 55 publications

References 1 publication

Calcium isotopic evidence for rapid recrystallization of bulk marine carbonates and implications for geochemical proxies

Calcium isotopic evidence for rapid recrystallization of bulk marine carbonates and implications for geochemical proxies

Eocene cooling linked to early flow across the Tasmanian Gateway

Pleistocene glaciomarine sediments of the Kisbee Formation, Wilson River, southwest Fiordland, and some tectonic and paleoclimatic implications

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