早阿普特期（Aptian）大洋缺氧事件（OAE 1a）标志着白垩纪温室气候的开始，在全球陆相和海相沉积地层中均伴随碳同位素的正偏移，岩性上常表现为黑色页岩沉积，伴随有明显的生物演化与交替。然而，关于放射虫动物群对OAE 1a的响应和用来指示OAE 1a的放射虫生物事件的研究仍然比较缺乏。本研究将已有很好岩石、生物和地球化学地层划分基础的Umbria-Marche盆地的地层为标准，对比藏南深海沉积和Umbria-Marche盆地浅海沉积中的早白垩世放射虫化石，利用在两个地区均丰度高且具有时代指示意义的关键种属的演化谱系，建立完善OAE 1a前后巴雷姆期到阿普特期适用于新特提斯洋的放射虫化石分带。综合有机碳同位素曲线和放射虫生物地层确定藏南深海沉积中OAE 1a的层位。在此基础上，通过定量统计分析，探讨新特提斯洋内放射虫动物群演变对OAE 1a的响应。

The Early Aptian Oceanic Anoxic Event (OAE 1a), which is characterized by widespread black shale deposition, global shifts in δ13C values, and a major biotic turnover, indicates the onset of a widespread greenhouse climate. Radiolarian plays a significant role in age determination and correlation for marine sediment. However, the radiolarian faunal turnover around the OAE 1a and the bio-event for the OAE 1a are still unknown. The strata in the Umbria-Marche basin with integrated litho-, bio- and chemo-stratigraphy provide an accurate scheme for correlation and age assignment. This study intends to establish a radiolarian zonation for the Barremian to Aptian interval based on the phyletic evolution of co-existing species or genus in these two areas. Correlations on the basis of radiolarian biostratigrphy and shifts in organic δ13C values will be used for indicating the OAE 1a in the deep-marine sediment in southern Tibet. Quantitative analyses are used for analyzing the faunal change affected by the OAE 1a in the Neo-Tethys.