Li, Qianyu; Li, Baohua; Zhong, Guangfa; McGowran, Brian; Zhou, Zuyi; Wang, Jiliang; Wang, Pinxian (2006): Late Miocene development of the western Pacific warm pool: Planktonic foraminifer and oxygen isotopic evidence [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.693967, Supplement to: Li, Q et al. (2006): Late Miocene development of the western Pacific warm pool: Planktonic foraminifer and oxygen isotopic evidence. Palaeogeography, Palaeoclimatology, Palaeoecology, 237(2-4), 465-482, https://doi.org/10.1016/j.palaeo.2005.12.019
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Abstract:
The disappearance at ~10 Ma of the deep dwelling planktonic foraminifer Globoquadrina dehiscens from the western Pacific including the South China Sea was about 3 Myr earlier than its final extinction elsewhere. Accompanying this event at ~10 Ma was a series of faunal turnover characterized by increase in mixed layer, warm-water species and decrease to a minimum in deepwater species. Paleobiological and isotopic evidence indicates sea surface warming and a deepened local thermocline that we interpret as related to the development of an early western Pacific warm pool. The stepwise decline of G. dehiscens and other deep dwelling species from the NW and SW Pacific suggests more intensive warm water pileup than equatorial localities where surface bypass flow through the narrowing Indonesia seaway appears to remain efficient during the late Miocene. Planktonic delta18O values from the South China Sea consistently lighter than the tropical western Pacific during the Miocene also suggest, similar to today, more variable hydrologic conditions along the periphery than in the core of the warm pool. Stronger hydrologic variability affected mainly by monsoons and increased thermal gradient along the western margin of the late Miocene warm pool may have contributed to the decline of deep dwelling planktonic species including the early extinction of G. dehiscens from the South China Sea region. The late Miocene warm pool became influential and paleobiologically detectable from ~10 Ma, but the modern warm pool did not appear until about 4 Ma, in the middle Pliocene.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 8.322053 * Median Longitude: 114.614685 * South-bound Latitude: -40.507800 * West-bound Longitude: -43.489067 * North-bound Latitude: 36.868500 * East-bound Longitude: 176.901500
Date/Time Start: 1969-12-15T00:00:00 * Date/Time End: 1999-04-10T00:00:00
Event(s):
9-77_Site * Latitude: 0.481700 * Longitude: -133.228300 * Date/Time: 1969-12-15T00:00:00 * Elevation: -4291.0 m * Penetration: 5.92 m * Recovery: 4.538 m * Location: North Pacific/HILL * Campaign: Leg9 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 56 cores; 482.4 m cored; 3.1 m drilled; 94.1% recovery
32-310_Site * Latitude: 36.868500 * Longitude: 176.901500 * Date/Time: 1973-09-19T00:00:00 * Elevation: -3516.0 m * Penetration: 5.46 m * Recovery: 1.727 m * Location: North Pacific/CONT RISE * Campaign: Leg32 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 38 cores; 347.5 m cored; 9.5 m drilled; 49.7% recovery
68-502_Site * Latitude: 11.491100 * Longitude: -79.378800 * Date/Time: 1979-08-16T00:00:00 * Elevation: -3051.0 m * Penetration: 7.573 m * Recovery: 5.313 m * Location: Caribbean Sea/RIDGE * Campaign: Leg68 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 169 cores; 629.8 m cored; 24.1 m drilled; 84.4% recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Li, Q; Li, B; Zhong, G et al. (2006): (Table 2) Stable carbon ond oxygen isotope ratios of planktonic foraminifera in Late Miocene sediments of ODP Site 184-1146 in the western Pacific. https://doi.org/10.1594/PANGAEA.693966
- Li, Q; Li, B; Zhong, G et al. (2006): (Table 1) Estimated age for the last occurrence of Globoquadrina dehiscens. https://doi.org/10.1594/PANGAEA.693964