Partitioning behavior of moderately siderophile elements in Ni-rich systems: Implications for the earth and moon.

摘要: Several scenarios set forth to explain the siderophile element abundance patterns in mantles of Earth and Moon involve segregation Ni-rich metal cores those bodies under oxidizing conditions. To test these models, partition coefficients Ni, Co, Mo, W, P, Ga between basaltic liquid, metal, Nirich sulfide were experimentally determined a wide range oxygen fugacities. The are then used mass balance calculations involving conditions during formation both Earth's Moon's cores. results show that pattern mantle is consistent with late stage small fraction consists approximately 70% Ni at low degrees partial melting silicates. This result not early being substantially molten as giant impact form Moon. for lunar core high silicates if some elements initially depleted by other process-presumably volatility impact. degree postulated magma ocean on Chapter