NDLI: Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

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Marine Geophysical Researches : Volume 36, Issue 1, March 2015

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Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

Content Provider	Springer Nature Link
Author	Ding, Weiwei Li, Jiabiao Dong, Congzhi Fang, Yinxia
Copyright Year	2014
Abstract	We have analyzed two recently acquired multi-channel seismic profiles across the Reed Bank area, South China Sea. A detailed seismic interpretation coupled with drilling data has proved the occurrence of a wide carbonate platform, developed between the Late Oligocene and the Early Miocene (32–20 Ma). The top of these carbonates is an important regional unconformity, corresponding to a strong and continuous seismic reflector. An age of about 20 Ma is inferred for this reflector, acting as a regional unconformity marking the cessation of seafloor spreading with an erosional/non-depositional hiatus, spanning 3 or 4 m.y. The time interval during which the carbonate platforms formed is concurrent with the opening of the South China Sea. The reconstruction of the tectonic subsidence in this area has shown a decrease in rate of subsidence during the drifting stage (32–17 Ma), indicating that the whole Reed Bank area was in a tectonically stable and shallow water environment for more than 10 m.y., favoring the development of shallow water carbonates. With a sharply increased subsidence rate after the end of spreading (17 Ma) and a continuously increased sea level, the carbonate platforms were drowned and died, except some structural highs with reef buildups, where the carbonate sedimentation continued to Middle Miocene. We suggest that delayed tectonic subsidence in Reed Bank area might have been related to a secondary mantle convection under the rift lasting more than about 10 m.y.
Starting Page	149
Ending Page	165
Page Count	17
File Format	PDF
ISSN	00253235
Journal	Marine Geophysical Researches
Volume Number	36
Issue Number	2-3
e-ISSN	15730581
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-09-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbonates Reed Bank area Tectonic subsidence Mantle convection Sea level changes South China Sea Oceanography Geophysics/Geodesy Earth Sciences Offshore Engineering
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Geophysics Oceanography

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Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

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Oligocene–Miocene carbonates in the Reed Bank area, South China Sea, and their tectono-sedimentary evolution

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