西太平洋暖池核心区晚第四纪颗石藻属种变化及对环境演化的响应

梁丹; 刘传联; 苏翔

doi:10.3724/SP.J.1140.2012.04115

西太平洋暖池核心区晚第四纪颗石藻属种变化及对环境演化的响应

同济大学海洋地质国家重点实验室, 上海 200092

基金项目:

国家自然科学基金项目(40876023)

详细信息

作者简介:
梁丹(1986-),博士研究生,主要从事古海洋学研究,E-mail:liangdan861012@163.com

中图分类号: P736.22
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- 文章访问数: 2033
- HTML全文浏览量: 189
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出版历程
- 收稿日期: 2012-07-05
- 修回日期: 2012-07-16

COCCOLITH VARIATIONS IN CENTRAL WEST PACIFIC WARM POOL AND THEIR RESPONSE TO ENVIRONMENTAL CHANGE DURING LATE QUATERNARY

State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

摘要

摘要: 对西太平洋暖池核心区KX97321-2站位380 ka以来的颗石藻化石进行了属种鉴定及百分含量分析。结果显示,380 ka以来Florisphaera profunda百分含量升高,对应营养跃层加深,初级生产力降低,Gephyrocapsa spp.的百分含量降低;在中布容期,Gephyrocapsa caribbeanica是优势种,是对中布容期特殊的环境条件适应演化的结果;对380 ka以来F.profunda换算的初级生产力进行频谱分析,发现有100 ka周期和30 ka周期,而分段分析发现,0~80 ka和320~380 ka 2万年周期明显,中间80~320 ka 4万年周期明显。
- 颗石藻 /
- 晚第四纪 /
- 中布容期 /
- 西太平洋暖池
Abstract: The analysis of coccolith species and percentage for the past 380 ka from Site KX97321-2 of the central West Pacific Warm Pool has been carried out. The results show that the relative abundance of Florisphaera profunda increased in the last 380 ka, indicating the decline of nutricline depth and the decrease in primary productivity. The relative abundance of Gephyrocapsa spp. however, dropped in the last 380 ka. Gephyrocapsa caribbeanica was the most abundant species in the Mid-Brunhes interval as the result of the adaptive evolution to the Mid-Brunhes peculiar environment. Based on the spectrum analysis of primary productivity converted from F. profunda, 100 ka and 30 ka cycles were discovered during the last 380 ka. 20 ka cycle was found obvious in the 0~80 ka and 320~380 ka, and 40 ka cycle in the 80~320 ka.
- Coccolithphores /
- Late Quaternary /
- Mid-Brunhes /
- West Pacific Warm Pool

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