Paleomagnetic Field Variability 100-200,000 YBP: A Test of the Relationship Between Excursions and Secular Variation
Paleomagnetic Field Variability 100-200,000 YBP: A Test of the Relationship Between Excursions and Secular Variation
批准号:
9526940
负责人:
Steven Lund
金额:
$20.63万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1996
资助国家:
美国
项目状态:
已结题
起止时间:
1996-05-15 至 1999-04-30
中文摘要
Lund 9526940本提案要求资金,以便从最近在北大西洋西部(北纬35°,西经72°)的深海沉积物布莱克/巴哈马外脊发现的一组28个活塞芯(平均长度为20米)中恢复氧同位素第5和第6阶段的重复、详细的PSV、漂移和古强度记录。所有取芯沉积物的年龄均小于20万年(18 O阶段6),沉积速率至少为10 cm/Kyr;大多数在更新世的沉积速率大于20 cm/Kyr。以前对布莱克/巴哈马外脊沉积物的古地磁和沉积物磁学研究表明,这些岩心记录了古磁场长期变化(PSV),不同岩心的PSV记录可以很容易地在它们之间进行对比。这项先前工作最重要的方面之一是首次完整地记录了拉尚之旅(42ka)。这种漂移记录独特的矢量和古强度模式及其与莫诺湖漂移(28ka)的自相似性表明,它们是由相同类型的核心发电机过程形成的。来自我们三个新岩心的初步古地磁数据清楚地表明,这些记录还包含另外两个漂移:首次从布莱克/巴哈马外脊(Smith and Foster,1969)沉积岩芯定义的布莱克事件(Blake Event)(约125ka),以及Biwa I?远足(约170ka)。初步的古地磁数据表明,布莱克漂移在氧同位素阶段5的最早时段内看起来像是一个真正的反极性区间。另一方面,碧瓦I漂移看起来更像莫诺湖和拉尚漂移。这项拟议的研究将为建立PSV和远足之间关系的新模型提供关键的新信息,并将在古磁学界产生广泛影响。
英文摘要
Lund 9526940 This proposal requests funds to recover replicate, detailed PSV, excursion, and paleointensity records within oxygen isotope stages 5 and 6 from a group of 28 piston cores (20 m average length) that has recently been recovered from the Blake/Bahama Outer Ridge, a deep-sea sediment drift deposit in the Western North Atlantic Ocean (35o N, 72o W). All of the cored sediments are less than 200,000 years old ( 18 O Stage 6) and have sedimentation rates of at least 10 cm/kyr; most have rates greater than 20 cm/kyr during the Pleistocene. The PIs previous paleomagnetic and sediment magnetic studies of sediments from the Blake/Bahama Outer Ridge clearly show that paleomagnetic field secular variation (PSV) is recorded in these cores, and that the PSV records from the different cores can be easily correlated among them. One of the most significant aspects of this previous work is the first complete record of the Laschamp excursion (42 ka). The distinctive vector and paleointensity pattern of this excursion record and its self-similarity to the Mono Lake excursion (28ka) argue that they were formed by the same style of core dynamo process. Preliminary paleomagnetic data from three of our new cores clearly indicate that these records also contain two more excursions: 'Blake event' (ca. 125 ka), first defined from sediment cores of the Blake/Bahama Outer Ridge (Smith and Foster, 1969), and the Biwa I? excursion (ca. 170 ka). Preliminary paleomagnetic data indicate that the Blake excursion looks like a true reversed polarity interval within the earliest interval of oxygen isotope stage 5. On the other hand, the Biwa I excursion looks much more like the Mono Lake and Laschamp excursions. The proposed research will provide critical new information for developing a new model of the relationship between PSV and excursions and will have a broad impact in the paleo-magnetics community.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Reanalysis of Paleomagnetic Secular Variation and Excursions During Early Brunhes Time (380-780 ka) at ODP Sites 1060, 1061, 1062, and 1063
-
批准号:2219330
-
项目类别:Standard Grant
-
资助金额:$16.36万
-
财政年份:2022
-
负责人:Steven Lund
-
依托单位:
Graduate Research at Michigan State University to Push the Intensity Frontier and Support Accelerator Science
-
批准号:1632761
-
项目类别:Standard Grant
-
资助金额:$20.1万
-
财政年份:2016
-
负责人:Steven Lund
-
依托单位:
Estimating the Character of Paleomagnetic Field Excursions and Surrounding Secular Variation at Equatorial Latitudes (Equatorial W. Atlantic; MIS 1-4)
-
批准号:1547605
-
项目类别:Standard Grant
-
资助金额:$22.69万
-
财政年份:2016
-
负责人:Steven Lund
-
依托单位:
Filling Holes in the Holocene Geomagnetic Field - Tropical East Africa
-
批准号:1316507
-
项目类别:Standard Grant
-
资助金额:$20.0万
-
财政年份:2013
-
负责人:Steven Lund
-
依托单位:
Evidence for Geomagnetic Field Excursions Recorded in Postglacial (9-15,000 Calendar YBP) Carbonates of the Tahiti Coral Reef
-
批准号:0943857
-
项目类别:Standard Grant
-
资助金额:$21.33万
-
财政年份:2010
-
负责人:Steven Lund
-
依托单位:
Collaborative Research: Expedition 323 Objective Research on the Paleoceanography of the Bering Sea
-
批准号:0962385
-
项目类别:Continuing Grant
-
资助金额:$11.12万
-
财政年份:2010
-
负责人:Steven Lund
-
依托单位:
Chronostratigraphy and Environmental Variability in Postglacial Carbonates of the Tahiti Coral Reef
-
批准号:0751827
-
项目类别:Standard Grant
-
资助金额:$17.62万
-
财政年份:2008
-
负责人:Steven Lund
-
依托单位:
Collaborative Research: Pleistocene Geomagnetic Field Variability from the High-Latitude Southern Hemisphere
-
批准号:0635348
-
项目类别:Standard Grant
-
资助金额:$16.5万
-
财政年份:2007
-
负责人:Steven Lund
-
依托单位:
Collaborative Research/RUI: Assessing Multi-scale Holocene Climate Variability in Western North America Using Sediments from Lake Elsinore (Southern CA)
-
批准号:0602245
-
项目类别:Continuing Grant
-
资助金额:$4.79万
-
财政年份:2006
-
负责人:Steven Lund
-
依托单位:
Reassessment of the Mono Lake Excursion
-
批准号:0609770
-
项目类别:Standard Grant
-
资助金额:$15.5万
-
财政年份:2006
-
负责人:Steven Lund
-
依托单位:
Upgrade of the Paleomagnetism/Rock Magnetism Laboratory at the University of Southern California
-
批准号:0349894
-
项目类别:Standard Grant
-
资助金额:$15.61万
-
财政年份:2004
-
负责人:Steven Lund
-
依托单位:
Collaborative Research: Holocene Geomagnetic Field Variability from the High-Latitude Southern Hemisphere
-
批准号:0308991
-
项目类别:Standard Grant
-
资助金额:$15.25万
-
财政年份:2003
-
负责人:Steven Lund
-
依托单位:
Magnetic Field Excursions and Related Secular Variation During the Brunhes Epoch (0-780,000 YBP)
-
批准号:0117848
-
项目类别:Standard Grant
-
资助金额:$14.58万
-
财政年份:2001
-
负责人:Steven Lund
-
依托单位:
A Test of Paleomagnetic Field Variability at Equatorial Latitudes
-
批准号:0106685
-
项目类别:Standard Grant
-
资助金额:$15.54万
-
财政年份:2001
-
负责人:Steven Lund
-
依托单位:
A Test of Paleomagnetic Field Variability at Equatorial Latitudes
-
批准号:9980410
-
项目类别:Standard Grant
-
资助金额:$5.88万
-
财政年份:2000
-
负责人:Steven Lund
-
依托单位:
Analysis of Relative Paleointensity Methods Applied to Deep-Sea Sediments
-
批准号:9218897
-
项目类别:Standard Grant
-
资助金额:$10.05万
-
财政年份:1993
-
负责人:Steven Lund
-
依托单位:
Collaborative Research: Global Geomagnetic Field Modeling for Modeling for 0-3000 Years B.P.
-
批准号:9304398
-
项目类别:Standard Grant
-
资助金额:$2.18万
-
财政年份:1993
-
负责人:Steven Lund
-
依托单位:
Paleomagnetic Study of Late Pleistocene Lacustrine SedimentsFrom Owens and Mono Lakes, California
-
批准号:9117931
-
项目类别:Standard Grant
-
资助金额:$10.58万
-
财政年份:1992
-
负责人:Steven Lund
-
依托单位:
Paleomagnetic Secular Variation and Rock Magnetics of High- Sedimentation-Rate Marine Sediments (0-120,000 YBP) from theNorthwest Atlantic Ocean
-
批准号:9000465
-
项目类别:Continuing Grant
-
资助金额:$12.96万
-
财政年份:1990
-
负责人:Steven Lund
-
依托单位:
Microplate Tectonic Development of Southern California
-
批准号:8816177
-
项目类别:Continuing Grant
-
资助金额:$8.91万
-
财政年份:1989
-
负责人:Steven Lund
-
依托单位:
国内基金
海外基金
登录
查看更多内容
Graphon mean field games with partial observation and application to failure detection in distributed systems
-
批准号:
-
项目类别:省市级项目
-
资助金额:--
-
批准年份:2025
-
负责人:MATHIEULOUROCHLAURIERE
-
依托单位:
Research on Quantum Field Theory without a Lagrangian Description
-
批准号:24ZR1403900
-
项目类别:省市级项目
-
资助金额:--
-
批准年份:2024
-
负责人:SATOSHI NAWATA
-
依托单位:
Development of a Linear Stochastic Model for Wind Field Reconstruction from Limited Measurement Data
-
批准号:--
-
项目类别:--
-
资助金额:40万元
-
批准年份:2020
-
负责人:Vikrant Gupta
-
依托单位:
新型Field-SEA多尺度溶剂模型的开发与应用研究
-
批准号:21506066
-
项目类别:青年科学基金项目
-
资助金额:21.0万元
-
批准年份:2015
-
负责人:李理波
-
依托单位: