The Eocene-Oligocene transition in Nanggulan, Java: lithostratigraphy, biostratigraphy and foraminiferal stable isotopes
The Eocene-Oligocene transition in Nanggulan, Java: lithostratigraphy, biostratigraphy and foraminiferal stable isotopes
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爪哇南古兰始新世-渐新世转变：岩石地层学、生物地层学和有孔虫稳定同位素
DOI：
10.1144/jgs2021-006
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发表时间：
2021
影响因子：
2.7
通讯作者：
Coxall H
中科院分区：
文献类型：
--
作者：
Coxall H
爪哇中南部浪古兰剖面由始新世-渐新世开阔的海相沉积和火山沉积组成，堆积在年轻的舜达弧杂岩内的边缘盆地中。一个新的钻孔捕捉到了地层，并展示了在明显完成的始新世-渐新世过渡(EOT)期间钙质微体化石的特殊保存，这一时间间隔对南极洲大陆规模冰川的开始具有重要意义。低分辨率底栖和浮游有孔虫的氧和碳稳定同位素(18O和13C)记录到在基底部渐新世增加了18O和13C，从而与全球记录进行了对比。同位素值表明爪哇东南部边缘温度较高，营养物质相对较高。Nangulan EOT是重建印度洋-太平洋暖池海洋气候行为和浮游生物演化和灭绝的宝贵档案。这个钻孔还增加了对舜达弧火山早期阶段的了解。补充材料：补充数字、表格和附录可在https://doi.org/10.6084/m9.figshare.c.5429453上获得
The Nanggulan section in south central Java comprises open marine sediments and volcanic deposits of Eocene–Oligocene age that accumulated in a marginal basin within the young Sunda Arc complex. A new borehole captures the stratigraphy and showcases the exceptional preservation of calcareous microfossils across an apparently complete Eocene–Oligocene Transition (EOT), a time interval significant for the initiation of continental-scale glaciation on Antarctica. Low-resolution benthic and planktonic foraminifera oxygen and carbon stable isotopes (18O and13C) record increasing18O and13C in the basal Oligocene, allowing correlation to global records. Isotopic values imply warm temperatures and relatively high nutrients along the SE Java margin. The Nanggulan EOT is a valuable archive for reconstructing ocean–climate behaviour and plankton evolution and extinction in the Indo-Pacific Warm Pool. The borehole also adds to understanding of the early stages of Sunda Arc volcanism.Supplementary material:Supplementary figures, tables and appendices are available at https://doi.org/10.6084/m9.figshare.c.5429453