Abstract
This chapter summarizes the history of hydrogen isotope studies of Martian meteorites since the first detection of nonterrestrial hydrogen from the meteorites. Contamination of terrestrial water has been a major issue throughout most of this history. This review, in particular, focuses on recent ion microprobe studies that have contributed to the identification of Martian hydrogen reservoirs and have constrained their evolution throughout the planet’s history. NASA’s Curiosity rover has also provided valuable insights on the water history based on in situ hydrogen isotopic measurements of rocks in Gale crater since 2012 (see Chapter 12, Volatile Detections in Gale Crater Sediment and Sedimentary Rock: Results from the Mars Science Laboratory’s Sample Analysis at Mars Instrument).
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