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学科主题: Geochemistry & Geophysics
题名: Rock magnetic evidence for inclination shallowing in the Passaic Formation red beds from the Newark basin and a systematic bias of the Late Triassic apparent polar wander path for North America
作者: Tan, XD ; Kodama, KP ; Gilder, S ; Courtillot, V
通讯作者: xdtan@scsio.ac.cn ; kpk0@lehigh.edu ; gilder@ipgp.jussieu.fr ; courtil@ipgp.jussieu.fr
关键词: paleomagnetism ; Newark basin ; inclination shallowing ; magnetic anisotropy ; red beds ; Triassic
刊名: EARTH AND PLANETARY SCIENCE LETTERS
发表日期: 2007
卷: 254, 期:40606, 页:345-357
收录类别: sci
部门归属: Chinese Acad Sci, CAS Key Lab Marginal Sea Geol, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Lehigh Univ, Dept Earth & Environm Sci, Bethlehem, PA 18015 USA; Inst Phys Globe, Lab Paleomagnetisme, F-75252 Paris, France
项目归属: 海洋地质
摘要: The latest Triassic and earliest Jurassic red beds from the Newark basin possess paleomagnetic inclinations that are similar to 10 degrees shallower than the inclinations carried by coeval volcanic rocks. It has been suggested that the difference might be due either to inclination shallowing of the sediments or to remagnetization of the volcanic rocks during a Middle Jurassic hydrothermal event. Either explanation would in turn yield significantly different apparent polar wander paths (APWPs) for the Late Triassic and Early Jurassic of North America. Here we present paleomagnetic and magnetic anisotropy data for the latest Triassic Passaic Formation red beds, which reveal deposition and/or compaction fabrics with 10% anisotropy of the high unblocking temperature, reversed polarity remanent magnetization. Inclination correction for the red beds yields similar directions to that carried by the earliest Jurassic volcanic rocks, indicating that inclination shallowing is the major cause for the difference in palcomagnetic pole position between the red beds and the volcanic rocks. Comparison of the inclination corrected data with the Late Triassic North American APWP shows a systematic error in the APWP, likely due to inclination shallowing. In turn, this error may be even more significant for much of the Paleozoic part of the North American APWP. (c) 2006 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000244801400009
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4510
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Tan, XD; Kodama, KP; Gilder, S; Courtillot, V.Rock magnetic evidence for inclination shallowing in the Passaic Formation red beds from the Newark basin and a systematic bias of the Late Triassic apparent polar wander path for North America,EARTH AND PLANETARY SCIENCE LETTERS,2007,254(40606):345-357
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文件名: Rock magnetic evidence for inclination shallowing in the Passaic Formation red beds from the Newark basin and a systematic bias of the Late Triassic apparent polar wander path for North America .pdf
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