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- handle: 10670/1.8h9ecw
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Jean-François Deconinck et al., « Palygorskite and eustatism during Mid-Cretaceous in the Maiella Mountain (Abruzzi, Central Italy) », Sciences Géologiques, bulletins et mémoires, ID : 10670/1.8h9ecw
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Résumé
The clay mineralogy of Mid-Cretaceous carbonate pelagic sediments of the Maiella Mountain, a transition zone between the Abruzzi platform and the Umbrian basin, have been studied by X-ray diffraction and transmission electron microscopy. The clay assemblages are composed of chlorite, illite, smectite, illite/smectite mixed-layers and detrital palygorskite. The palygorskite occurs only in sediments deposited during anoxic periods. These periods are associated with sea-level rises, and therefore it is suggested that during Mid-Cretaceous, in the basin of the Maiella Mountain, palygorskite was derived from the reworking of pedogenic crusts or chemical sediments which were deposited on the adjacent platform areas during transgressive events.