西天山变质岩Cr同位素数据和全岩主、微量元素含量

我们选取了西天山榴辉岩、蓝片岩、围岩云母片岩、大理岩和高压蛇纹岩作为主要的研究对象，进行了详细的Cr同位素组成分析，探讨蛇纹岩脱水过程中Cr同位素行为及氧逸度的影响。所有样品经过双稀释剂法两次离子交换树脂纯化，最后利用Triton TIMS开展对这些标样的Cr同位素组成分析，分析精度优于0.03‰（2SD）。相关数据成果已发表在2021年GCA上，论文信息Shen et al. Tracing serpentinite dehydration in a subduction channel: chromium isotope evidence from subducted oceanic crust.

We selected eclogites, blueschists, country-rock mica schists, marbles, and high-pressure serpentinites from the Western Tianshan as the primary study subjects, and conducted detailed chromium (Cr) isotope composition analyses to investigate the Cr isotope behavior and the effect of oxygen fugacity during serpentinite dehydration. All samples were purified via two-stage ion-exchange resin chromatography using the double-spike method, then underwent Cr isotope composition analysis using Triton thermal ionization mass spectrometry (TIMS), with an analytical precision better than 0.03‰ (2SD). The associated dataset has been published in *Geochimica et Cosmochimica Acta* (GCA) in 2021, with the citation: Shen et al. Tracing serpentinite dehydration in a subduction channel: chromium isotope evidence from subducted oceanic crust.

搜集汇总

背景与挑战

背景概述

该数据集提供了中国西天山地区变质岩（包括榴辉岩、蓝片岩、云母片岩、大理岩和高压蛇纹岩）的铬同位素数据以及全岩主量和微量元素含量，旨在研究蛇纹岩脱水过程中的铬同位素行为和氧逸度影响，数据基于高精度分析方法（双稀释剂法和Triton TIMS），分析精度优于0.03‰，相关研究成果已发表于2021年《Geochimica et Cosmochimica Acta》期刊。数据集覆盖时间范围为2010年至2020年，空间位置为西天山特定区域，以开放获取方式共享，适用于固体地球科学和地球化学研究。