Li Jianru et al. (2002): Variations of opal accumulation rates and paleoproductivity over the past 12 Ma at ODP Site 1143, southern South China Sea

Leg/Site/Hole:
ODP 184
ODP 184 1143
Identifier:
2003-079115
georefid
Creator:
Li Jianru
Tongji University, Laboratory of Marine Geology, Shanghai, China
author
Wang Rujian
Chinese Academy of Sciences, China
author
Li Baohua
author
Identification:
Variations of opal accumulation rates and paleoproductivity over the past 12 Ma at ODP Site 1143, southern South China Sea
2002
Chinese Science Bulletin
Science Press, Beijing, China
47
7
596-598
The biogenic silica analysis was performed on 463 samples from ODP 184 Site 1143, the southern South China Sea. The results show that the opal content and MAR evidently increased between 12.3 and 5.7 Ma, which was contemporary with the high carbonate and total MARs, reflecting the high biogenic productivity in the late Miocene. This demonstrates the occurrence of the late Miocene "Biogenic Bloom Event" in the southern South China Sea, corresponding to the late Miocene-early Pliocene "Biogenic Bloom Event" in the Indian-Pacific Ocean. The increases of opal content and MAR after the middle Pleistocene (about 0.7 Ma) is inferred to result from the enhanced upwelling and nutrient supply, which was induced by the intensified monsoon circulation after the "Mid-Pleistocene Revolution".
English
Serial
Coverage:Geographic coordinates:
North:9.2143
West:113.1707East: 113.1707
South:9.2143
Stratigraphy; Cenozoic; event stratigraphy; framework silicates; Leg 184; marine sedimentation; Miocene; Neogene; North Pacific; Northwest Pacific; Ocean Drilling Program; ODP Site 1143; opal; Pacific Ocean; paleo-oceanography; productivity; sedimentation; sedimentation rates; sequence stratigraphy; silica minerals; silicates; South China Sea; Tertiary; upper Miocene; variations; West Pacific;
.