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Post-stack time migration of a set of seismic reflection profiles reveals details of the stratigraphic-structural setting of the outermost Calabrian accretionary wedge, in the NW sector of the Ionian Sea, with particular emphasis on the Messinian stratigraphy and the deformation style of the thin frontal portion of this wedge. A structural style and seismic facies analysis, calibrated by refraction data, images a general bipartition of the Messinian evaporite deposits: the 'lower subunit', consisting mainly of salt, appears to have undergone ductile-flow deformation, and the 'upper subunit', consisting mainly of gypsum and marls, appears to be characterized by brittle deformation. Lateral variations in evaporite composition and / or thickness reflect a change in the deformation style of the accretionary wedge, with the development of double-verging imbricated thrust sheets of the whole Messinian sequence. Gravitational-slide tectonics of the unstable accretionary wedge, too steep to support a skinny evaporite-based top layer, characterize the outermost wedge, indicating here a near-surface 'olistostrome' from the Late Messinian. [ABSTRACT FROM AUTHOR]

The article reports that LA-ICP-MS zircon U-Pb age of newly discovered Hatu tectonic mélange in the West Junggar, Xinjiang, Northwest China. Topics include the post-embryonic tissue tube-shaped with densely spaced and slightly raised annuli, and the circlets of triangular thickenings form five longitudinal rows, pentaradially arranged on perradial belts of postembryonic tissue.

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Copyright of Island Arc is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)