南海北部B106站柱状沉积的孢粉与藻类及其古环境演变

张玉兰; 龙江平

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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