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The great isotopic dichotomy of the early Solar System

机译：早期太阳系的巨大同位素二分法

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Cosmochemical measurements reveal the existence of two distinct reservoirs of non-carbonaceous and carbonaceous materials, originating from the inner and outer protoplanetary disk, respectively, which separated after the first million years after the birth of the Solar System, possibly due to the rapid growth of Jupiter's core.The isotopic composition of meteorites and terrestrial planets holds important clues about the earliest history of the Solar System and the processes of planet formation. Recent work has shown that meteorites exhibit a fundamental isotopic dichotomy between non-carbonaceous (NC) and carbonaceous (CC) groups, which most likely represent material from the inner and outer Solar System, respectively. Here we review the isotopic evidence for this NC-CC dichotomy, discuss its origin and highlight the far-reaching implications for the dynamics of the solar protoplanetary disk. The NC-CC dichotomy combined with the chronology of meteorite parent-body accretion mandate an early and prolonged spatial separation of inner (NC) and outer (CC) disk reservoirs, lasting between ~1 and ~4 Myr after Solar System formation. This is most easily reconciled with the early and rapid growth of Jupiter's core, inhibiting substantial exchange of material from inside and outside its orbit. The growth and migration of Jupiter also led to the later implantation of CC bodies into the inner Solar System and, therefore, can explain the co-occurrence of NC and CC bodies in the asteroid belt, and the delivery of volatile and water-rich CC bodies to the terrestrial planets.
机译：宇宙化学测量揭示了存在两个不同的非碳质和碳质物质储集层，分别来自内和外原行星盘，它们是在太阳系诞生后的第一百万年后分开的。木星的核心。陨石和地球行星的同位素组成为太阳系的最早历史和行星形成过程提供了重要线索。最近的工作表明，陨石在非碳质（NC）和碳质（CC）基团之间表现出基本的同位素二分法，它们最有可能分别代表太阳系内部和外部的物质。在这里，我们回顾了这种NC-CC二分法的同位素证据，讨论了它的起源并强调了对太阳原行星盘动力学的深远影响。 NC-CC二分法与陨石母体增生的时间顺序相结合，要求内部（NC）和外部（CC）盘状储层的早期和长期空间分离，在太阳系形成后持续约1到〜4 Myr。这很容易与木星核心的早期和快速增长相吻合，从而抑制了来自其轨道内外的大量物质交换。木星的生长和迁移也导致了CC体后来植入内部太阳系，因此，可以解释小行星带中NC和CC体的共生以及挥发性和富水CC的传递行星的尸体。

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