Paleomagnetism of a Late Cretaceous island arc complex from South Sakhalin, East Asia - Convergent boundaries far away from the Asian continental margin?

Paleomagnetism of a Late Cretaceous island arc complex from South Sakhalin, East Asia - Convergent boundaries far away from the Asian continental margin?

The Hokkaido-Sakhalin fold system stretches for about 1500 km along the eastern coast of Asia and consists of several N-S trending tectonic belts. Studies in South Sakhalin show that the northern part of the Tonino-Aniva Peninsula (Ozersk unit) is a counterpart of the Tokoro belt on Hokkaido, Japan....

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Veröffentlicht in:Geochimica et cosmochimica acta 2001-09, Vol.106 (B9), p.19
Hauptverfasser: Bazhenov, Mikhail L, Zharov, Alexander E, Levashova, Natalia M, Kodama, Kazuto, Bragin, Nikita Y, Fedorov, Peter I, Bragina, Lyubov G, Lyapunov, Sergey M
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container_title Geochimica et cosmochimica acta
container_volume 106
creator Bazhenov, Mikhail L
Zharov, Alexander E
Levashova, Natalia M
Kodama, Kazuto
Bragin, Nikita Y
Fedorov, Peter I
Bragina, Lyubov G
Lyapunov, Sergey M
description The Hokkaido-Sakhalin fold system stretches for about 1500 km along the eastern coast of Asia and consists of several N-S trending tectonic belts. Studies in South Sakhalin show that the northern part of the Tonino-Aniva Peninsula (Ozersk unit) is a counterpart of the Tokoro belt on Hokkaido, Japan. In the eastern part of the Ozersk unit, 195 hand samples were sampled at 20 sites from Campanian-Maastrichtian tuffaceous siltstones and sandstones of the Chavka Formation of island arc affinity. Stepwise thermal demagnetization isolates a postfolding low- to intermediate-temperature component (B) of normal polarity. A high-temperature component (A) is isolated from about half the samples. Component A is mostly of reversed polarity: a few samples of normal polarity are found at three sites. (Author)
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title Paleomagnetism of a Late Cretaceous island arc complex from South Sakhalin, East Asia - Convergent boundaries far away from the Asian continental margin?
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