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Title: The Mesoproterozoic ‘seismite’ at Laiyuan (Hebei Province, E China) re-interpreted
Authors: van Loon, A.J. (Tom)
Keywords: Seismite
Valley fill
Graben sedimentation
Wumishan Formation
Fangshan geopark
Hebei Province
Issue Date: 30-Jun-2014
Publisher: Bogucki Wydawnictwo Naukowe
Citation: Geologos, 2014, 20, 2, s. 139-146
Abstract: A 1-million m3 breccia near Laiyuan (Hebei Province, E China) occurs as a block-like lithological unit between dolo -stones of the 1.55–1.45 Ga (Early Mesoproterozoic) Wumishan Formation. It has previously been interpreted as a seis -mite, but it appears not to fulfil any of the commonly accepted criteria that jointly are considered diagnostic for seis -mites. Its presence in a graben-like structure with almost vertical bounding fault planes rather indicates an origin as a (submarine) valley fill. As the valley originated by tectonic activity in the form of faulting, the breccia can be consid-ered as a secondary effect of seismic activity, but it does not represent a seismite.
ISBN: 978-83-232187-4-6
ISSN: 1426-8981
Appears in Collections:Geologos, 2014, 20, 2

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