Organic-rich sedimentation in the South Pacific Ocean associated with Late Paleocene climatic cooling

Hollis, Christopher J.; Tayler, M. J. S.; Andrew, Benjamin Steven; Taylor, Kyle; Lurcock, Pontus; Bijl, Peter K.; Kulhanek, Denise K.; Crouch, Erica M.; Nelson, Campbell S.; Pancost, Richard D.; Huber, Matthew; Wilson, Gary; Ventura, G. Todd; Crampton, James S.; Schiøler, Poul; Phillips, Andy

doi:10.1016/j.earscirev.2014.03.006

Cited by 61 publications

(169 citation statements)

References 81 publications

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“…Indeed, the lack of a coherent obliquity signal in any of the Site 1262 isotopic or %CF records (Figs. 4, 6), suggests that polar ice volumes were minimal during the Early Paleogene, as glaciated high-latitudes are known to be particularly sensitive to obliquity forcing in other periods of time such as the Neogene (e.g., Raymo and Nisancioglu, 2003;Huybers and Wunsch, 2005;Naish et al, 2009). This stands in contrast to other lower-resolution Late Paleocene-Early Eocene marine stable-isotope records, which have suggested an obliquity beat is one of the dominant components of the coupled climate-carbon-cycle at this time (e.g., DeConto et al, 2012).…”

Section: Orbital Pacing Of Paleogene Climate and Carbon-cyclingmentioning

confidence: 96%

A high-resolution benthic stable-isotope record for the South Atlantic: Implications for orbital-scale changes in Late Paleocene–Early Eocene climate and carbon cycling

Littler

Röhl

Westerhold

et al. 2014

Earth and Planetary Science Letters

150

241

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Section: Orbital Pacing Of Paleogene Climate and Carbon-cyclingmentioning

confidence: 96%

A high-resolution benthic stable-isotope record for the South Atlantic: Implications for orbital-scale changes in Late Paleocene–Early Eocene climate and carbon cycling

Littler

Röhl

Westerhold

et al. 2014

Earth and Planetary Science Letters

150

241

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“…We cannot be sure that there was not a second warming pulse above the onset of the PETM on the Campbell Plateau because the main phase of the PETM may not be preserved at Site 277. However, the absolute SST values at Site 277 are similar to the peak SSTs at Site 1172, i.e., 30-32 • C. Therefore, we need to explain how the Campbell Plateau warmed at the start of the PETM and stayed warm through the onset, while the East Tasman Plateau warmed to a lesser extent initially but then continued to warm into the main phase of the PETM, with both sites experiencing at least seasonal SST maxima in excess of 30 • C. We speculate that the gradual warming that followed Southern Ocean cooling at 59 Ma (Hollis et al, 2014) exceeded a threshold at the start of the PETM that caused the southward expansion of the subtropical-tropical gyre over the Campbell Plateau. This gyre was sustained through the PETM onset but resulted in no additional warming at this location.…”

Section: Comparison With Other Petm Recordsmentioning

confidence: 99%

The Paleocene–Eocene Thermal Maximum at DSDP Site 277, Campbell Plateau, southern Pacific Ocean

et al. 2015

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Abstract. Re-examination of sediment cores from Deep Sea Drilling Project (DSDP) Site 277 on the western margin of the Campbell Plateau (paleolatitude of ∼ 65 • S) has identified an intact Paleocene-Eocene (P-E) boundary overlain by a 34 cm thick record of the Paleocene-Eocene Thermal Maximum (PETM) within nannofossil chalk. The upper part of the PETM is truncated, either due to drilling disturbance or a sedimentary hiatus. An intact record of the onset of the PETM is indicated by a gradual decrease in δ 13 C values over 20 cm, followed by a 14 cm interval in which δ 13 C is 2 ‰ lighter than uppermost Paleocene values. After accounting for effects of diagenetic alteration, we use δ 18 O and Mg / Ca values from foraminiferal tests to determine that intermediate and surface waters warmed by ∼ 5-6 • at the onset of the PETM prior to the full development of the negative δ 13 C excursion. After this initial warming, sea temperatures were relatively stable through the PETM but declined abruptly across the horizon that truncates the event at this site. Mg / Ca analysis of foraminiferal tests indicates peak intermediate and surface water temperatures of ∼ 19 and ∼ 32 • C, respectively. These temperatures may be influenced by residual diagenetic factors and changes in ocean circulation, and surface water values may also be biased towards warm-season temperatures.

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“…Higher contributions of terrestrial (mainly woody) plant matter are indicated by higher land plant biomarkers and high phenol/naphthalene ratios [39]. The presence of a Late Paleocene source rock in the study region is confirmed by Ariki-1 well, where the Waipawa Formation is represented by a 12 m thick organic-rich marine shale located at depth of 4122-4134 m with total organic carbon (TOC) averaging 3.6 wt% [40]. A maximum TOC value of 11.5 wt% was derived for the samples from Ariki-1 well [41].…”

Section: Figurementioning

confidence: 70%

“…The approximate top Waipawa reflection (P10) corresponds to a negative reflection around well Ariki-1. Although there is no evidence from seismic data that the Waipawa Formation is present underneath the Kora volcano, the fact that it is related to a regional paleooceanographic event suggests a wide distribution in the northern Taranaki Basin [39,40]. The Top Cretaceous reflector P00 is also indicated in the Ariki-1 well (Figure 3) as a SEG normal soft kick.…”

Section: Seismic Horizonsmentioning

confidence: 99%

Thermal Effects of Magmatism on Surrounding Sediments and Petroleum Systems in the Northern Offshore Taranaki Basin, New Zealand

et al. 2019

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In the past two decades, numerical forward modeling of petroleum systems has been extensively used in exploration geology. However, modeling of petroleum systems influenced by magmatic activity has not been a common practice, because it is often associated with additional uncertainties and thus is a high risk associated with exploration. Subsurface processes associated with volcanic activity extensively influence all the elements of petroleum systems and may have positive and negative effects on hydrocarbon formation and accumulation. This study integrates 3D seismic data, geochemical and well data to build detailed 1D and 3D models of the Kora Volcano—a buried Miocene arc volcano in the northern Taranaki Basin, New Zealand. It examines the impact of magmatism on the source rock maturation and burial history in the northern Taranaki Basin. The Kora field contains a sub-commercial oil accumulation in volcanoclastic rocks that has been encountered by a well drilled on the flank of the volcano. By comparing the results of distinct models, we concluded that magmatic activity had a local effect on the thermal regime in the study area and resulted in rapid thermal maturation of the surrounding organic matter-rich sediments. Scenarios of the magmatic activity age (18, 11 and 8 Ma) show that the re-equilibration of the temperature after intrusion takes longer (up to 5 Ma) in the scenarios with a younger emplacement age (8 Ma) due to an added insulation effect of the thicker overburden. Results of the modeling also suggest that most hydrocarbons expelled from the source rock during this magmatic event escaped to the surface due to the absence of a proper seal rock at that time.

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Organic-rich sedimentation in the South Pacific Ocean associated with Late Paleocene climatic cooling

Cited by 61 publications

References 81 publications

A high-resolution benthic stable-isotope record for the South Atlantic: Implications for orbital-scale changes in Late Paleocene–Early Eocene climate and carbon cycling

A high-resolution benthic stable-isotope record for the South Atlantic: Implications for orbital-scale changes in Late Paleocene–Early Eocene climate and carbon cycling

The Paleocene–Eocene Thermal Maximum at DSDP Site 277, Campbell Plateau, southern Pacific Ocean

Thermal Effects of Magmatism on Surrounding Sediments and Petroleum Systems in the Northern Offshore Taranaki Basin, New Zealand

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