Weathering and subsequent precipitation of Ca-and Mg-carbonates are the main processes that control the CO 2 -concentration in the atmosphere. It seems logical, therefore, to use enhanced weathering as a tool to reduce rising CO 2 -levels. This can be applied as a technology, by reacting captured CO 2 with olivine or calcium-silicates in autoclaves. It can also be applied extensively, by spreading fine-powdered olivine on farmland or forestland. Measures to control the CO 2 -levels of the atmosphere will be adopted more readily if they also serve some broader economic goals. An effective strategy for CO 2 control will require many parallel approaches simultaneously.

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A detailed structural study of Naxos (Attic-Cycladic massif, Greece) reveals two major deformation events. The first one is associated with large scale thrusting and high-pressure-low-temperature metamorphism during an early Alpine subduction episode. The second event occurred during continental extension and the associated development of localized thermal domes, where lower crustal rocks were brought into contact with upper crustal units along a major shallow dipping shear zone. We agree with a model of Naxos as a Cordilleran type Metamorphic Core Complex. However, our observations show that the sense of shear was ‘upper plate moving North’ during the second event, calling for a reinterpretation of existing tectonic models of the Cyclades.

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