Roadmap
Seven phases.One of them isirreversible.
§12The Roadmap
| Phase | Objective | Gate | Timescale | K |
|---|---|---|---|---|
| 0 | Prospecting: ice, global nitrate survey, sulfate/pH mapping, dust–aerosol study | Inventories characterized | to ~2040 | 0.73 |
| I | Paraterraforming: aerogel greenhouses, ISRU, perchlorate remediation | Self-sustaining habitats | 2030s–2100 | 0.75 |
| II | Thermal: aerosol/mirror forcing to +30 K | Seasonal meltwater | decades | 0.80 |
| III-a | Hydrosphere + acidophile ecopoiesis (must precede III-b) | Self-propagating biosphere | centuries | 0.85 |
| III-b | Oxygen via water electrolysis (must follow III-a) | pO₂ rising, H₂ venting stable | centuries | 0.90 |
| IV | Nitrogen import from Titan | 1.5×10¹⁸ kg delivered | ~600 yr at Type I | 1.00 |
| V | Composition closure: pCO₂ < 10 mbar, ozone, obliquity management | Shirtsleeve | millennia | 1.00 |
Sequencing constraint, CA-002
Iron supplies 42% of the divalent cations available for carbonate formation. Oxygenation converts Fe(II) to insoluble Fe(III) oxide and removes it permanently from the carbon-burial budget. Carbon buried under anoxia can use the iron pathway. Carbon buried afterward cannot. These phases were specified as parallel. They are not. Burial must be run to completion first.
Phases 0–III are individually valuable and reversible. Phase IV is the irreversible commitment, and the true decision point.
Interactive · Iteration 05
TOOL PENDING
Interactive Roadmap Timeline
Horizontal axis Phase 0 → V with III-a and III-b splitting into parallel tracks that rejoin. Rising Kardashev line beneath. Click a phase for detail (objective, gate, timescale, off-ramp). Phase IV marked distinctly in oxide. Ships in Iteration 5.