Metal Deposits Related to Advanced Stages of Rifting
The variability in styles of rifting makes generalization of the more advanced stages of rifting a hazardous exercise. Nevertheless, broad patterns can be recognized. If the rifting is destined to result in creation of a new ocean basin, it will at a certain point produce a narrow seaway similar to that of the present Red Sea (Martinez and Cochran 1988). Other rifts that fail may only do so after they have evolved from an early stage of subaerial and very shallow-marine deposition to deep, starved basin-type environments. Still others may receive sufficient supplies of sediment to build up great thicknesses of sedimentary rocks (< 10 km) without acquiring deep-marine environments.
KeywordsZinc Manganese Calcite Jurassic Apatite
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