2026-10-12T08:34:38Z https://www.scidb.cn/oai

10.57760/sciencedb.00zrh 2026-09-16T16:50:47Z

2026-09-16 The data of the article “In situ Microscale Determination of Chromium Valence in Chang’e-5 lunar samples and Constraints on the Lunar Mantle Redox State” doi:10.57760/sciencedb.00zrh en This dataset contains three supplementary tables supporting the research article “In situ Microscale Determination of Chromium Valence in Chang‘e-5 lunar samples and Constraints on the Lunar Mantle Redox State”. The three tables are systematically interconnected, providing a complete data chain from raw analytical data to final petrological interpretations.Table 1 presents the major element compositions of pyroxene grains in Chang’e-5 lunar basalt fragments, determined by electron probe microanalysis (EPMA). The dataset reports oxide concentrations (e.g., SiO₂, TiO₂, Al₂O₃, Cr₂O₃, FeO, MnO, MgO, CaO, Na₂O, K₂O) for each analytical spot, serving as the fundamental raw data for all subsequent calculations.Table 2 provides the cation numbers for pyroxenes calculated on the basis of 6 oxygen atoms from the EPMA data in Table 1. This table reports the cation abundances (Si, Ti, Al, Cr, Fe³⁺, Fe²⁺, Mn, Mg, Ca, Na) for each analytical spot, representing a critical intermediate dataset for understanding pyroxene crystal chemistry and performing subsequent thermodynamic calculations.Table 3 compiles the Cr valence states (Cr³⁺/ΣCr) and corresponding oxygen fugacity (fO₂) estimates for individual pyroxene grains, along with the associated analytical uncertainties. These data provide the most direct in situ micro-scale constraints on the oxygen fugacity recorded by the Chang‘e-5 basalts, offering key insights into the redox state of the lunar mantle source region.The data are provided in CSV (comma-separated values) format and can be opened with Microsoft Excel, WPS, or any text editor. Data were acquired using electron probe microanalysis (EPMA) and processed through crystal-chemical stoichiometric calculations. Chang’e-5; pyroxene; Cr valence state; oxygen fugacity; lunar mantle redox state liu zi jun An Zhendong Guo Chenchen Ma Yugang PUBLIC https://creativecommons.org/licenses/by-nc-sa/4.0/ dataset Science Data Bank