Neogene West Pacific tectonic influence on global climate via the Kuroshio Current

新近纪西太平洋构造通过黑潮对全球气候的影响

• 批准号: NE/M005178/1
• 负责人: David Hodell
• 金额: $ 6.32万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FM005178%2F1
• 关键词: Neogene; West; Pacific; tectonic; influence

The proposed research would produce a thorough quantitative foraminiferal study of 500 deep-sea sediments samples and aims to reconstruct the paleoceanographic changes in the West Pacific Ocean in the vicinity of the Kuroshio Current. The study is based primarily on coarse fraction (>150 micron) microscopic examinations. However, the micropaleontological work on planktonic and benthic foraminifera assemblages will be complemented by the analysis of stable isotopes (O18 & C13 ratios) measured on foraminifera extracted from selected samples. These analyses should confirm the stratigraphy of Site IBM-3C as well as inform the paleoceanographic and paleoclimatic interpretations obtained for the samples.At such a subtropical location (30deg N), the study of the planktonic assemblages is a very useful contribution for reconstructing changing surface conditions because glacial and interglacial faunal assemblages are very contrasted. In particular, the study will provide needed data about changes in the Kuroshio Current path, which are potentially linked to changing ENSO intensity in the Pacific Ocean. The study focuses on the last 6 Ma.In the area of the IBM and at 2114 water depth, the low resolution study of the benthic foraminifera assemblages extracted from 50 coarse fraction samples will provide some estimates of paleo-depth and deep-water environmental changes at a time resolution better than 1 Ma throughout the Neogene. All analyses will be performed in the Godwin Laboratory for Paleoclimate Research (Earth Sciences Department, Cambridge University) from carefully selected Neogene sediments taken on board JOIDES Resolution during Leg 350 by Dr. Vautravers sailing as a foraminifera expert.

拟议的研究将对 500 个深海沉积物样本进行彻底的定量有孔虫研究，旨在重建黑潮海流附近西太平洋的古海洋变化。该研究主要基于粗粒级（>150 微米）显微镜检查。然而，浮游和底栖有孔虫组合的微型古生物学工作将通过对从选定样品中提取的有孔虫测量的稳定同位素（O18 和 C13 比率）进行分析来补充。这些分析应证实 IBM-3C 站点的地层学，并为样本获得的古海洋学和古气候解释提供信息。在这样一个亚热带位置（北纬 30 度），浮游生物组合的研究对于重建变化的表面非常有用。因为冰期和间冰期的动物群落差异很大。特别是，该研究将提供有关黑潮路径变化的所需数据，这些变化可能与太平洋 ENSO 强度的变化有关。该研究重点关注最近6 Ma。在IBM地区和2114水深，对从50个粗级样本中提取的底栖有孔虫组合进行低分辨率研究，将为古深度和深水环境变化提供一些估计整个新近纪的时间分辨率优于 1 Ma。所有分析都将在戈德温古气候研究实验室（剑桥大学地球科学系）中进行，这些沉积物是由作为有孔虫专家的 Vautravers 博士在第 350 段航行期间在 JOIDES Resolution 船上采集的精心挑选的新近纪沉积物。

项目成果

Data Report: Pleistocene planktonic foraminiferal Oxygen and Carbon stable isotopes records and their use to improve the age model of Hole U1436C recovered East of the volcanic Aogashima Island.

数据报告：更新世浮游有孔虫氧和碳稳定同位素记录及其用于改进在青岛岛东部火山岛回收的 U1436C 洞年龄模型的用途。

• 作者: Vautravers M.J.

Quantitative planktonic foraminifers taphonomy and palaeoceanographic implications over the last 1 My from IODP Sites U1436 and U1437

过去 1 My IODP 站点 U1436 和 U1437 的定量浮游有孔虫埋藏学和古海洋学意义

• DOI: http://dx.10.17863/cam.24975
• 发表时间: 2018
• 作者: Mleneck

One Million Years tephra record at IODP S ites U 1436 and U 1437: I nsights into explosive volcanism from the J apan and I zu arcs

IODP 站点 U 1436 和 U 1437 的一百万年火山灰记录：从日本和伊祖弧对爆发性火山活动的见解

• DOI: http://dx.10.1111/iar.12244
• 发表时间: 2018
• 期刊: Island Arc
• 影响因子: 1.5
• 作者: Schindlbeck J

Quantitative planktonic foraminifers taphonomy and palaeoceanographic implications over the last 1 My from IODP Sites U1436 and U1437

过去 1 My IODP 站点 U1436 和 U1437 的定量浮游有孔虫埋藏学和古海洋学意义

• DOI: http://dx.10.1080/23312041.2018.1447263
• 发表时间: 2018
• 期刊: Cogent Geoscience
• 作者: Mleneck

100- kyr cyclicity in volcanic ash emplacement: evidence from a 1.1 Myr tephra record from the NW Pacific.

火山灰沉积的 100 kyr 周期性：来自西北太平洋 1.1 Myr tephra 记录的证据。

• DOI: http://dx.10.1038/s41598-018-22595-0
• 发表时间: 2018
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Schindlbeck JC