2012年9月
Palaeomagnetism of the West Sakhalin Basin: evidence for northward displacement during the Cretaceous
GEOPHYSICAL JOURNAL INTERNATIONAL
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- ,
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- 巻
- 190
- 号
- 3
- 開始ページ
- 1439
- 終了ページ
- 1454
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1111/j.1365-246X.2012.05572.x
- 出版者・発行元
- WILEY-BLACKWELL
A significant margin-parallel translation of terranes is postulated by all models for tectonic evolution of the East Asian continental margin, although the timing and magnitude of displacements of individual elements are poorly constrained as yet. The West Sakhalin Basina forearc basin associated with the Cretaceous volcanic arcsis one of the displaced tectonic elements. Our palaeomagnetic study of the basin rocks provides the first quantitative constraints on its Cretaceous history. We identified a characteristic magnetization in the BerriasianValanginian basalt representing the oceanic basement of the basin and four characteristic magnetizations in a continuous sequence of the Albian to Maastrichtian siliciclastic fill of the basin. A combination of the positive fold, conglomerate and reversals tests supports the primary origin of the remanence in the sediments. Palaeomagnetic data indicate a gradual shift of the West Sakhalin Basin from subequatorial latitudes during the Early Cretaceous to about 40oN by the Late Cretaceous. The main phase of the margin-parallel migration took place during the Early Cretaceous, and ended by the Cenomanian. The continuous sedimentary sequence records similar to 50 degrees of progressive clockwise rotation during the Late Cretaceous.
- リンク情報
- ID情報
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- DOI : 10.1111/j.1365-246X.2012.05572.x
- ISSN : 0956-540X
- Web of Science ID : WOS:000307571100011