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The response of paleo-water depth to T60 tectonic movement in the northern South China Sea during the late Oligocene to early Miocene
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Yijing Wang1, Haiyan Jin1, *, Zhimin Jian1, Juan Xu1
Haiyang Xuebao | 2021, 43(5) : 79 - 87
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Haiyang Xuebao | 2021, 43(5): 79-87
• Article •
The response of paleo-water depth to T60 tectonic movement in the northern South China Sea during the late Oligocene to early Miocene
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Yijing Wang1, Haiyan Jin1, *, Zhimin Jian1, Juan Xu1
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  • 1State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
Published: 2021-05-25 doi: 10.12284/hyxb2021093
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Samples of International Ocean Discovery Program (IODP) 368 Site U1501 between core depth 264.0−331.1 m were collected and analyzed in this study. Through foraminifera oxygen isotopic stratigraphy and Sr isotopic dating, the age of this depth interval ranges from early Miocene 20.3 Ma to late Oligocene 32.0 Ma (with seismic reflector T60 bottom age at 28−30.5 Ma). After T60 event, 3 proxies including the content of organic carbon, stable δ13C of benthic foraminifera and the difference of δ13C between planktonic and benthic foraminifera (Δδ13CP-B) showed the sea surface paleo-productivity weakened; meanwhile, the carbonate content and the organic carbon/nitrogen ratio revealed the terrigenous input decreased. Combined with the changes of relative abundance of planktonic foraminifera and the benthic foraminifera faunal combinations, these paleo-environmental proxies implies that during late Oligocene to early Miocene, the regional tectonic subsidence in the northern South China Sea leaded to the deepening of the paleo-water depth and increasing the offshore distance at Site U1501 after the T60 event. These conclusions provide micropaleontology evidence for better understanding of T60 tectonic event and subsequent sedimentary environment researches.

the northern South China Sea  /  T60  /  paleo-water depth  /  surface paleo-productivity
Yijing Wang, Haiyan Jin, Zhimin Jian, Juan Xu. The response of paleo-water depth to T60 tectonic movement in the northern South China Sea during the late Oligocene to early Miocene[J]. Haiyang Xuebao, 2021 , 43 (5) : 79 -87 . DOI: 10.12284/hyxb2021093
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doi: 10.12284/hyxb2021093
  • Receive Date：2020-05-11
  • Online Date：2026-02-26
  • Published：2021-05-25
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  • Received：2020-05-11
  • Revised：2020-08-27
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    1State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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