Collaborative Research: Resolving Centennial-Scale Environmental Change and Geomagnetic Field Variability From Iberian Margin Sediment Drifts Cored on IODP Expedition 339

合作研究：解决以 IODP 339 号探险为核心的伊比利亚边缘沉积物漂移带来的百年规模的环境变化和地磁场变化

• 批准号: 1334163
• 负责人: Carl Richter
• 金额: $ 10万
• 依托单位: University of Louisiana at Lafayette
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-11-01 至 2016-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1334163&HistoricalAwards=false
• 关键词: Collaborative; Research; Resolving; Centennial; Scale

This proposal seeks to use continuous u-channel and discrete paleomagnetic data in combination with color analysis and shipboard data to develop chronological and climate data on the Quaternary contourite section cored during IODP exp. 339.The magnetic data will enable development of a detailed regional type section of Quaternary geomagnetic field variability with implications for both geochronology and larger questions concerning the nature of the magnetic field and geodynamo. Five sites cored during exp. 339 will be examined and preliminary data suggests that magnetic properties can be correlated from hole-to-hole. The thickness of the Quaternary record and overall high sedimentation rates could make these cores particularly amenable to this type of detailed analysis. This study, in combination with isotopic, astronomic, and stratigraphic analysis will enable construction of an exceptionally detailed chronology which can then be tied to climate models, especially those related to thermohaline circulation. This is directly related to the primary objective of exp. 339 which is the development and constraint of models relating saline Mediterranean outflow to climate variations and events. In the modern Atlantic, this outflow has important effects of the circulation of deep ocean water. The understanding of these circulation patterns is one important element of predicting global climate variations.

该提案旨在使用连续的u通道和离散的古地磁数据，结合颜色分析和船上数据，以开发在IODP勘探期间取芯的第四纪等深岩剖面的年代学和气候数据。339.磁数据将使发展的一个详细的区域类型部分的第四纪地磁场的变化与地质年代学和更大的问题有关的磁场和地球发电机的性质的影响。在试验期间对5个部位进行取芯。339将被检查和初步的数据表明，磁性可以从孔到孔相关。第四纪记录的厚度和总体的高沉积速率使这些岩心特别适合这种类型的详细分析。这项研究，结合同位素，天文和地层分析，将使建设一个非常详细的年表，然后可以绑定到气候模型，特别是那些与温盐环流。这与exp的主要目标直接相关。339，这是发展和约束的模型有关盐水地中海外流气候变化和事件。在现代大西洋，这种外流对深海水的循环有重要影响。了解这些环流模式是预测全球气候变化的一个重要因素。