10.1594/PANGAEA.693967
Li, Qianyu
Qianyu
Li
Li, Baohua
Baohua
Li
Zhong, Guangfa
Guangfa
Zhong
0000-0003-1570-760X
McGowran, Brian
Brian
McGowran
Zhou, Zuyi
Zuyi
Zhou
Wang, Jiliang
Jiliang
Wang
Wang, Pinxian
Pinxian
Wang
Late Miocene development of the western Pacific warm pool: Planktonic foraminifer and oxygen isotopic evidence
PANGAEA
2006
Composite Core
Drilling/drill rig
Leg9
Leg32
Leg68
Leg85
Leg89
Leg90
Leg121
Leg122
Leg130
Leg138
Leg154
Leg184
Glomar Challenger
Joides Resolution
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
1969-12-15T00:00:00/1999-04-10T00:00:00
en
Supplementary Publication Series of Datasets
10.1016/j.palaeo.2005.12.019
2 datasets
application/zip
Creative Commons Attribution 3.0 Unported
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.
Supplement to: 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. Palaeogeography, Palaeoclimatology, Palaeoecology, 237(2-4), 465-482
-43.489066666666986
176.9015
-40.5078
36.8685
North Pacific/HILL
North Pacific/CONT RISE
Caribbean Sea/RIDGE
North Pacific/FLANK
North Pacific/TROUGH
South Pacific
South Pacific/Tasman Sea/CONT RISE
South Pacific/Tasman Sea/PLATEAU
Indian Ocean
South Indian Ridge, South Indian Ocean
North Pacific Ocean
South Pacific Ocean
South Atlantic Ocean
South China Sea