Mid-Holocene sea-level fluctuation in the Fujian coastal area: evidence from ostracod records of Core NDQK5
Author:
Affiliation:

1.State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences;3.University of Chinese Academy of Sciences;4.Nanjing Geological Survey Center, China Geological Survey;5.Shanghai Natural History Museum (Branch of Shanghai Science and Technology Museum);6.State Key Laboratory of Marine Geology, Tongji University

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The Quaternary deposits are widely distributed in the Fujian coastal area where is the ideal place to study the relative sea level changes since the late Pleistocene. Based on AMS 14C and optical stimulated luminescence (OSL) dating techniques, the high-resolution ostracod records from the Core NDQK5 obtained from Ningde of Fujian Province were used to reconstruct the relative sea level changes in this area during the mid-Holocene. Ostracods occurred at the depth interval of 4~17.1 m in Core NDQK 5 corresponds to about 8.2~6.9 cal. ka BP. Twenty-six marine ostracod species belonging to twenty-three genera are recovered from the core samples. On the basis of the relative abundance of main ostracod elements, three ostracod assemblages were identified. The ostracod assemblage A dominated by Bicornucythere bisanensis and Sinocytheridea impressa indicates a subtidal zone environment; the assemblage B with dominant species Sinocytheridea impressa and Neomonoceratina delicata represents the nearshore inner shelf; the assemblage C with the dominant species Sinocytheridea impressa and Loxoconcha ocellifera indicates the intertidal zone environment. Our ostracod data pointed out that a continuous sea level rise occurred in the Fujian coastal area since ~ 8.2 cal. ka BP, and the sea level reached the highstand during the period of 7.9 to 7.4 cal. ka BP; a fall in seal level existed in the period of 7.4~7.0 cal. ka BP, and then a minor sea level rise has been recognized. Hence, our results indicate that several minor fluctuations in sea level existed in the Fujian coastal area during the Holocene sea-level highstand period. Combined with the previous studies, we conclude that the sea level change in the Fujian coastal area was probably controlled by the meltwater from the ice sheet during 8.2~7 cal. ka BP; however, it was probably controlled by Glacio-hydro Isostatic Adjustment (GIA) effect after 7 cal. ka BP.

    Reference
    Related
    Cited by
Get Citation

JIA Baoyan, Peng Bo, WANG Jilong, YU Junjie, ZHOU Baochun, ZHAO Quanhong, LI Baohua, WANG Yaqiong.2024. Mid-Holocene sea-level fluctuation in the Fujian coastal area: evidence from ostracod records of Core NDQK5[J]. Acta Geologica Sinica,98(2):333-345

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:June 05,2023
  • Revised:July 24,2023
  • Adopted:July 31,2023
  • Online: April 10,2024
  • Published: