『Abstract
　Two dissolution surfaces, capped by phosphatic crusts that contain up to 40 wt.％ of P2O5. are well exposed in the latest Ediacaran Tabia Member (Adoudou Formation) of the Ounein（iの頭は¨） region, High Atlas. Both the Tabia dolostones and capping phosphorites are crosscut by several generations of synsedimentary faults, fissures, and hydrothermal dikes hosting Cu ore bodies, in a scenario of down-faulted blocks. Stratigraphic and facies relationships suggest the preservation of a major pulse of intra-cratonic rifting., responsible for the development of an unstable carbonate platform subjected to sharp uplift and tilting perturbations and dissolution processes, associated with hydrothermal dike-swarm injection. The whole framework is sealed with the Tamjout Bed (Tifnout Member), which marks the end of abundant regional tilting (syn-rift phase) and the beginning of a thermal subsidence-dominated regime (post-rift phase) in the Moroccan margin of West Gondwana.

Keywords: Apatite; Sulphide; Copper; microbialites; Neoproterozoic; West Gondwana』

1. Introduction
2. Geological setting and stratigraphy
3. Facies associations and stratigraphic discontinuities of the Tabla Member
　3.1. Terrigenous channels and sheets
　3.2. Dolostone channels and shoals
　3.3. Geometry of dissolution discontinuities
　3.4. Phosphoritic infill of dissolution cavities
　3.5. Dolomitic silty marlstones and shales
　3.6. Palaeoenvironmental features and small-scale sequences
4. Hydrothermal mineralizations
5. Palaeogeographic implications
6. Conclusions
Acknowledgements
References