論文

査読有り
2014年11月

Haematite pigmentation events and palaeomagnetic recording: implications from the Pilbara Print Stone, Western Australia

GEOPHYSICAL JOURNAL INTERNATIONAL
  • Alexandra Abrajevitch
  • ,
  • Brad J. Pillans
  • ,
  • Andrew P. Roberts

199
2
開始ページ
658
終了ページ
672
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1093/gji/ggu293
出版者・発行元
OXFORD UNIV PRESS

Haematite pigment is a common constituent of sedimentary rocks, but its contribution to the natural remanent magnetization of rocks is poorly understood. Here, we describe magnetic properties of two distinct pigment types that produce a characteristic decorative 'print stone' found in the similar to 2.5 Ga Mount McRae Shale Formation, Hamersley Province, Western Australia. Distinct magnetic remanence directions observed in the Print Stone can be correlated to each pigment type. By comparison with the Australian apparent polar wander path, the remanence carried by uniformly distributed pigment can be dated to similar to 15-25 Ma, while two age options, the Mesoproterozoic (similar to 1.5 Ga) or the middle Carboniferous (similar to 320-310 Ma), are permissible for the remanence carried by the pigment responsible for the distinctive 'newsprint' pattern. Magnetic properties and demagnetization characteristics of the different pigment types overlap significantly, and thus are not predictive of the dominant remanence carrier. Magnetic characteristics of the uniformly distributed pigment vary significantly on short spatial scales. Strong local control on pigment formation raises the possibility that a primary remanent magnetization may survive locally in pockets within sedimentary red bed formations.

リンク情報
DOI
https://doi.org/10.1093/gji/ggu293
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000343411700003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1093/gji/ggu293
  • ISSN : 0956-540X
  • eISSN : 1365-246X
  • Web of Science ID : WOS:000343411700003

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