南海北部B106站柱状沉积的孢粉与藻类及其古环境演变

SPOROPOLLEN AND ALGAE RESEARCH OF CORE B106 IN THE NORTHERN SOUTH CHINA SEA AND ITS PALEOENVIRONMENTAL EVOLUTION

    摘要
  • 摘要: 对南海北部B106站柱状剖面进行了高分辨率孢粉与藻类研究,部分样品作了AMS14C年代测定。根据孢粉成分的变化将南海B106站从下至上划分了3个孢粉组合带,依次为:1带(294~194 cm)以Pinus-Quercus(常绿)-Gramineae-Polypodiaceae-Pterdium-Dicranopteris为主孢粉带;2带(194~94 cm)以Pinus-Quercus(常绿)-Polypodiaceae-Pteridium-Dicranopteris为主孢粉带;3带(94~4 cm)以Pinus-Polypodiaceae-Pteridium-Quercus(常绿)-Dicranopteris为主孢粉带。并相应恢复了南海北部11 000 aBP以来3个植被、气候、古环境演替阶段,结合AMS14C测年资料,对B106站柱状地层时代划分作了讨沦,为南海古气候、古环境演变研究提供了科学依据。

     

    Abstract: Based on the high-resolution sporopollen and algae research of the sediments from core B106 in the northern South China Sea, three sporopollen zones have been distinguished in ascending order:
    Zone 1(294~194 cm):Pinus-Quercus(evergreen)-Gramineae-Polypodiaceae-Pterdium-Dicranopteris.
    Zone 2(194~94 cm):Pinus-Quercus(evergreen)-Polypodiaceae-Pteridium-Dicranopteris.
    Zone 3(94~4 cm):Pinus-Polypodiaceae-Pteridium-Quercus(evergreen)-Dicranopteris.
    These sporopollen zones reflect three stages of vegetation, climate and paleoenvironment evolution of the northern South China Sea since 11 000 years ago. Combined with AMS 14C dating, the sporopollen and algae data can be a scientific evidence for stratigraphic division and reconstruction of paleoclimate and paleoenvironment in the South China Sea.

     

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