The NASA Curiosity rover's ChemCam instrument suite has detected boron in calcium‐sulfate‐filled fractures throughout the sedimentary strata of Gale crater including Vera Rubin ridge. The presence of elevated B concentration provides insights into Martian subsurface aqueous processes. In this study we extend the data set of B in Ca‐sulfate veins across Gale crater, comparing the detection frequency and relative abundances with Li. We report 33 new detections of B within veins analyzed between Sols 1548 and 2311 where detections increase in Pettegrove Point and Jura members, which form Vera Rubin ridge. The presence of B and Li in the Ca‐sulfate veins is possibly due to dissolution of preexisting B in clays of the bedrock by acids or neutral water and redistribution of the elements into the veins. Elevated frequency of B detection in veins of Gale crater correlates with presence of dehydration features such as desiccation cracks, altered clay minerals and detections of evaporites such as Mg‐sulfates and chloride salts in the host rocks. The increased observations of B also coincide with decreased Li concentration in the veins (average Li concentration of veins drops by ~15 ppm). Boron and Li have varying solubilities, and Li does not form salts as readily upon dehydration as B, causing it to remain in the solution. So the weak negative correlation between B and Li may reflect the crystallization sequence during dehydration on Vera Rubin ridge.

中文翻译：

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硫酸钙静脉中的硼和锂：维拉鲁宾岭，大风火山口中成岩物质的追踪沉淀

NASA好奇心罗孚公司的ChemCam仪器套件已经在包括Vera Rubin脊在内的Gale火山口的整个沉积层中检测到了硫酸钙填充裂缝中的硼。硼浓度升高的存在提供了火星地下水过程的见解。在这项研究中，我们扩展了盖尔陨石坑中硫酸钙静脉中B的数据集，将检测频率和相对丰度与Li进行了比较。我们报告了在Sols 1548和2311之间分析的33个静脉内B的新发现，其中Pettegrove Point和Jura成员的检测增加，这形成了Vera Rubin脊。硫酸钙静脉中B和Li的存在可能是由于酸或中性水使基岩中粘土中先前存在的B溶解，并使元素重新分布到静脉中。大风火山口中的B检出频率升高与脱水特征（如干燥裂缝，粘土矿物变化）和蒸发岩（如硫酸镁和氯化物盐）的检测有关。对B的观察值的增加也与静脉中Li浓度的降低相吻合（静脉中Li的平均浓度下降了约15 ppm）。硼和Li的溶解度各不相同，并且在脱水时Li不像B那样容易形成盐，导致其保留在溶液中。因此，B和Li之间的弱负相关性可能反映了维拉鲁宾山脊脱水过程中的结晶顺序。对B的观察值的增加也与静脉中Li浓度的降低相吻合（静脉中Li的平均浓度下降了约15 ppm）。硼和锂具有不同的溶解度，并且脱水后锂不像B那样容易形成盐，导致其保留在溶液中。因此，B和Li之间的弱负相关性可能反映了维拉鲁宾山脊脱水过程中的结晶顺序。对B的观察值的增加也与静脉中Li浓度的降低相吻合（静脉中Li的平均浓度下降了约15 ppm）。硼和Li的溶解度各不相同，并且在脱水时Li不像B那样容易形成盐，导致其保留在溶液中。因此，B和Li之间的弱负相关性可能反映了维拉鲁宾山脊脱水过程中的结晶顺序。