Sr and Ba isotope composition of weathered eucrite ...

• Main Author: Kang, Jinting
• Format: Dataset
• Language: unknown
• Published: Mendeley Data 2024
• Subjects: Isotope Geochemistry; Cosmochemistry; Meteorite; Antarctic; Grove Mountains; Antarc*
• Online Access: https://dx.doi.org/10.17632/7b5tdbsmjz; https://data.mendeley.com/datasets/7b5tdbsmjz

Stable strontium and barium isotopes are potential tracers for understanding planetary differentiation and the nature of the building blocks of terrestrial planets. Strontium and barium are fluid-mobile elements, but it remains unclear how terrestrial weathering affects the Sr-Ba isotopes compositions in achondrites, thus hampering the utility of Sr-Ba isotopes in cosmochemistry. In this study, we conducted acetic acid leaching on three eucrites with varying weathering degrees (fall: Qiquanhu, hot desert find: Northwest Africa (NWA) 13583, and Antarctic find: Grove Mountains (GRV) 13001). Combined with detailed petrography observations and major and trace element analyses, we investigated the variations in Sr-Ba isotopes during terrestrial weathering. The degree of weathering follows an order of: NWA 13583>GRV 13001>Qiquanhu, evaluated based on several alteration signs, including: the presence of secondary carbonate, the enrichment of large ion lithophile elements (e.g., Sr, Ba, and U), and the Ce and ...