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<p>Oxygen fugacity of magmas and hydrothermal fluids is an important factor affecting element migration and mineralization. Zircon is an excellent monitor for oxygen fugacity of melts and fluids due to its exceptionally stable nature. However, zircon oxybarometers involve many complex algorithms leading to difficulties in use. Therefore, there is an urgent need to realize automatic calculation of various zircon oxybarometers. This study developed a Visual Basic for Applications (VBA) program, ZirconfO2, built in an Excel™ workbook, for calculating the oxygen fugacity of magmatic and hydrothermal fluids through the trace element characteristics of zircons. The program covers almost all the algorithms of zircon oxybarometers commonly-used so far. Through the user-friendly interface, users may input data expediently, obtain multiple results of various algorithms and find the most reliable oxygen fugacity range, effectively avoiding the possible misdirection of a single algorithm.</p>

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ZirconfO2: An Excel VBA Program for Magmatic and Hydrothermal Oxygen Fugacity Calculation Using Zircon Trace Elements

  • 期刊论文

  • 发表日期：

    2026年4月8日

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  • Jing Lei,
  • Yilin Xiao

摘要

Oxygen fugacity of magmas and hydrothermal fluids is an important factor affecting element migration and mineralization. Zircon is an excellent monitor for oxygen fugacity of melts and fluids due to its exceptionally stable nature. However, zircon oxybarometers involve many complex algorithms leading to difficulties in use. Therefore, there is an urgent need to realize automatic calculation of various zircon oxybarometers. This study developed a Visual Basic for Applications (VBA) program, ZirconfO2, built in an Excel™ workbook, for calculating the oxygen fugacity of magmatic and hydrothermal fluids through the trace element characteristics of zircons. The program covers almost all the algorithms of zircon oxybarometers commonly-used so far. Through the user-friendly interface, users may input data expediently, obtain multiple results of various algorithms and find the most reliable oxygen fugacity range, effectively avoiding the possible misdirection of a single algorithm.