Changes in Miocene deep-sea benthic foraminiferal distribution in the Pacific Ocean: Relationship to paleoceanography
Changes in Miocene deep-sea benthic foraminiferal distribution in the Pacific Ocean: Relationship to paleoceanography
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DOI：
10.1130/mem163-p131
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
F. Woodruff
中科院分区：
文献类型：
--
作者：
F. Woodruff
本文报道了25个中新世太平洋深海钻探项目(DSDP)的详细分析结果，这些地点对255个DSDP样本中的110个底栖有孔虫物种进行了量化。这些遗址的深度在北纬和南纬45度之间从1.5到4.5公里不等。研究了太平洋许多地点不同水深的动物群随时间的分布，给出了面积分布和水深分布的图表。中新世深海底栖有孔虫形成了清晰的分布格局。一些物种似乎对水团质量的变化作出了反应；另一些物种似乎反映了与古海洋变化相关的表面生产力变化导致的食物供应和样品保存的变化。动物群分布的许多变化以及进化起源和灭绝发生在13-16 Ma之间，伴随着可能与南极冰川扩张和深海太平洋冷却有关的古气候和海洋变化。晚中新世以来8~10 Ma的动物群变化主要是物种丰度和深度分布的变化，这似乎与南极进一步冰川作用的影响有关。
This paper reports the results of a detailed analysis of 25 Miocene Pacific Deep Sea Drilling Project (DSDP), sites at which 110 benthic foraminiferal species in 255 DSDP samples were quantified. The sites range in depth from 1.5 to 4.5 km between 45 degrees north and south latitudes. The faunal distributions were studied for many Pacific Ocean sites at different water depths through time; diagrams depicting both areal and water depth distributions are presented.Miocene deep-sea benthic foraminifera form clear distribution patterns. Some species appear to have reacted to changes in water mass quality; others appear to reflect changes in food availability and sample preservation resulting from changes in surface productivity related to paleoceanographic change. Many changes in faunal distribution, as well as evolutionary originations and extinctions, occurred between 13 and 16 Ma, concomitant with paleoclimatic and oceanographic changes presumably related to Antarctic glacier expansion and cooling of the deep Pacific Ocean. Late Miocene faunal changes between 8 and 10 Ma were primarily changes in species abundances and depth distribution which appear to be related to the effects of further Antarctic glaciation.