Elemental and isotopic signatures of Asteroid Ryugu support three early Solar System reservoirs

IF 4.8 1区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Earth and Planetary Science Letters Pub Date : 2025-05-17 DOI:10.1016/j.epsl.2025.119443

Quinn R. Shollenberger , Jan Render , Josh Wimpenny , Rosalind M.G. Armytage , Nipun Gunawardena , John M. Rolison , Justin I. Simon , Gregory A. Brennecka

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Abstract

Understanding the number and locations of different reservoirs present in the early Solar System is crucial to understanding the Solar System’s origin and evolution. Previous work has suggested that three unique isotopic reservoirs existed in the early Solar System but subsequent works have challenged that idea. Here we present elemental abundances along with Ca, Ti, Cr, Fe, Ni, and Zn isotopic data from primitive material returned by the Japan Aerospace Exploration Agency’s (JAXA) Hayabusa2 mission to asteroid (162173) Ryugu to make inferences on the Solar System’s early architecture. Data from Ryugu particle A0208 are consistent with a close genetic heritage between Ryugu and CI chondrites. We employ principal component analysis (PCA) on these Ryugu and published meteorite data to demonstrate that Ryugu and CI chondrites are distinct from other known astromaterials, strongly supporting the existence of a third major isotopic reservoir in the early Solar System.

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小行星龙宫的元素和同位素特征支持三个早期太阳系储层

了解早期太阳系中不同储层的数量和位置对于了解太阳系的起源和演化至关重要。先前的研究表明，早期太阳系中存在三个独特的同位素储层，但随后的研究对这一观点提出了挑战。在这里，我们展示了元素丰度以及Ca， Ti, Cr, Fe， Ni和Zn的同位素数据，这些数据来自日本宇宙航空研究开发机构（JAXA）隼鸟2号向小行星（162173）龙宫返回的原始物质，以推断太阳系的早期结构。来自Ryugu A0208颗粒的数据与Ryugu和CI球粒陨石之间密切的遗传遗传一致。我们利用主成分分析（PCA）对这些Ryugu和已发表的陨石数据进行分析，证明Ryugu和CI球粒陨石与其他已知的天体物质不同，有力地支持了太阳系早期存在第三个主要同位素储层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earth and Planetary Science Letters 地学-地球化学与地球物理

CiteScore

10.30

自引率

5.70%

发文量

475

审稿时长

2.8 months

期刊介绍： Earth and Planetary Science Letters (EPSL) is a leading journal for researchers across the entire Earth and planetary sciences community. It publishes concise, exciting, high-impact articles ("Letters") of broad interest. Its focus is on physical and chemical processes, the evolution and general properties of the Earth and planets - from their deep interiors to their atmospheres. EPSL also includes a Frontiers section, featuring invited high-profile synthesis articles by leading experts on timely topics to bring cutting-edge research to the wider community.