Xiang Rong, Li Tiegang, Yang Zuosheng, Yan Jun, Cao Qiyuan. Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply[J]. Acta Oceanologica Sinica, 2003, (1): 133-143.
Citation:
Xiang Rong, Li Tiegang, Yang Zuosheng, Yan Jun, Cao Qiyuan. Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply[J]. Acta Oceanologica Sinica, 2003, (1): 133-143.
Xiang Rong, Li Tiegang, Yang Zuosheng, Yan Jun, Cao Qiyuan. Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply[J]. Acta Oceanologica Sinica, 2003, (1): 133-143.
Citation:
Xiang Rong, Li Tiegang, Yang Zuosheng, Yan Jun, Cao Qiyuan. Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply[J]. Acta Oceanologica Sinica, 2003, (1): 133-143.
Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply
College of Marine Geosciences, Ocean University of China(Ocean University of Qingdao), Qingdao 266003, China;Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China
2.
Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China
3.
College of Marine Geosciences, Ocean University of China(Ocean University of Qingdao), Qingdao 266003, China
Benthic foraminiferal analysis of 29 samples in surface sediments from the southern Okinawa Trough is carried out.The results indicate that benthic foraminiferal abundance decreases rapidly with increasing water depth.Percentage frequencies of agglutinated foraminifera further confirm the modern shallow carbonate lysocline in the southern Okinawa Trough.From continental shelf edge to the bottom of Okinawa Trough,benthic foraminiferal fauna in the surface sediments can be divided into 5 assemblages:(1) Continental shelf break assemblage,dominated by Cibicides pseudoungerianus,corresponds to subsurface water mass of the Kuroshio Current;(2) upper continental slope assemblage,dominated by Cassidulina carinata,Globocassidulina subglobosa,corresponds to intermediate water mass of the Kuroshio Current;(3) intermediate continental slope assemblage,dominated by Uvigerina hispida,corresponds to the Okinawa Trough deep water mass above the carbonate lysocline.
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