Paleoceanographic evolution of the northeastern Indian Ocean during the Miocene: Evidence from deep-sea benthic foraminifera (DSDP Hole 216A)

Ajoy K. Bhaumik; Anil K. Gupta; M. Sundar Raj; K. Mohan; Soma De; Sudipta Sarkar

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Paleoceanographic evolution of the northeastern Indian Ocean during the Miocene: Evidence from deep-sea benthic foraminifera (DSDP Hole 216A)

机译：中新世期间印度洋东北部的古海洋演化：来自深海底栖有孔虫的证据（DSDP孔216A）

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Statistical analyses (factor and cluster) were performed on 30 highest ranked deep-sea benthic foraminifer species from > 149 μm size fraction from Deep Sea Drilling Project Hole 216A to understand Miocene (～20.5 to ～7 Ma) paleoceanographic evolution of the northeastern Indian Ocean. Factor and cluster analyses enabled us to identify five biofacies defining five clusters. Known ecological preferences of benthic foraminifera were used for environmental interpretations. The faunal data documents a shift in deep-sea ventilation and productivity at 15-14 Ma, coinciding with the abrupt cooling in the middle Miocene. This coincides with the beginning of permanent ice sheets in Antarctica during the middle Miocene.

机译：对深海钻井项目216A孔中大于149μm的30种排名最高的深海底栖有孔虫物种进行了统计分析（因子和聚类），以了解印度洋东北部的中新世（〜20.5至〜7 Ma）古海洋演化。因子和聚类分析使我们能够识别出定义五个聚类的五个生物相。底栖有孔虫的已知生态偏好被用于环境解释。动物区系数据记录了中新世中期突然降温的同时，深海通风和生产力在15-14 Ma发生了变化。这与中新世中期南极永久性冰盖的开始相吻合。

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来源
《Indian Journal of Marine Sciences》 |2007年第4期|p.332-341|共10页
作者
Ajoy K. Bhaumik; Anil K. Gupta; M. Sundar Raj; K. Mohan; Soma De; Sudipta Sarkar;
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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 eng
中图分类海洋学;
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Paleoceanographic evolution of the northeastern Indian Ocean during the Miocene: Evidence from deep-sea benthic foraminifera (DSDP Hole 216A)

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