Magnetic Record of the Matuyama Chron at ODP Leg 162 (North Atlantic) Sites

ODP 162 段（北大西洋）地点的松山纪元磁记录

• 批准号: 9804711
• 负责人: James Channell
• 金额: $ 7.9万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9804711&HistoricalAwards=false
• 关键词: Magnetic; Record; Matuyama; Chron; ODP

9804711ChannellODP Site 983 and Site 984 , located on drift sites south of Iceland, have yielded high fidelity (u-channel) records of geomagnetic secular variation and geomagnetic paleointensity in the Brunhes Chron, and of polarity transitions at the Brunhes-Matuyama boundary and the top of the Jaramillo Subchron. This proposal is to extend the record through the Matuyama Chron at Site 983 and Site 984 where sedimentation rates are 12-17 cm/kyr, and to embark on the study of Brunhes-Matuyama records from sites 980, 981 and 982 located on neighboring sediment drifts. The objectives are to correlate geomagnetic secular variation records and paleointensity records to the oxygen isotope records, which are already available for most of these sites, and to study polarity transitions records from the top of the Olduvai to the Brunhes-Matuyama boundary including the Cobb Mt. and other short events (Gilsa?) which appear in the shipboard pass-through records. All studies will be carried out on 2*2 cm u-channels affording much improved resolution over the shipboard data and allowing measurement of laboratory induced magnetizations (ARM, IRM) for constructing of paleointensity and grain size proxies. The data will allow further evaluation of the potential of paleointensity records as a means of millennial-scale correlation and will yield new high resolution records of geomagnetic field behavior in the Matuyama Chron.

9804711冰岛ODP站点983和站点984位于冰岛南部的漂移站点上，已经获得了Brunhes Chron地磁长期变化和地磁古强度的高保真度（u通道）记录，以及Brunhes-Matuyama边界和Jaramillo Subchron顶部的极性转换。 该建议是将记录延伸至沉积速率为12-17 cm/kyr的983和984站点的Matuyama Chron，并着手研究位于邻近沉积物漂移区的980、981和982站点的Brunhes-Matuyama记录。 目的是相关的地磁长期变化记录和古强度记录的氧同位素记录，这是已经为大多数这些网站，并研究极性转换记录从顶部的Olduvai的Brunhes-Matuyama边界，包括科布山。和其他短事件（吉尔萨？）出现在船上的通过记录中 所有研究都将在2*2 cm的U型通道上进行，该通道提供了比船上数据更高的分辨率，并允许测量实验室诱导磁化（ARM，ARM），以构建古强度和粒度代理。 这些数据将允许进一步评估古强度记录作为千年尺度相关性的一种手段的潜力，并将产生松山年代地磁场行为的新的高分辨率记录。