Magmatic water or juvenile water is water which exists within and in equilibrium with a magma or water rich volatile fluids which are derived from a magma.

This magmatic water is released to the atmosphere during a volcanic eruption. Magmatic water may also be released as hydrothermal fluids during the late stages of magmatic crystallization or solidification within the Earth's crust. The crystallization of hydroxyl bearing amphibole and mica minerals acts to contain part of the magmatic water within a solidified igneous rock. Ultimate sources of this magmatic water includes water and hydrous minerals in rocks melted during subduction as well as primordial water brought up from the deep mantle.

Three Separate Spacecraft Have Detected Significant Water On the Moon: Why Has NASA Waited So Long To Say So?


In another paper, previously unreleased 1999 flyby data from Cassini ("Detection of Adsorbed Water and Hydroxyl on the Moon", Roger N. Clark) shows hydroxyl concentrations on "the sunlit face of the Moon". Water was detected in concentrations as high as "10 to 1,000 parts per million" and according to the paper "Regardless of its origin, water is found on the lunar surface in areas previously thought to have been depleted in volatiles."

The Chandrayaan-1 paper ("Character and Spatial Distribution of OH/H2O on the Surface of the Moon Seen by M3 on Chandrayaan-1", C. M. Pieters et al) says "data suggests that the formation and retention of OH and H2O is an ongoing surficial process. OH/H2O production processes may feed polar cold traps and make the lunar regolith a candidate source of volatiles for human exploration."

It would seem that NASA has been sitting on a lot of data confirming with regard to the Moon - in some cases, for years. Meanwhile, a lot of people are trying to downplay the importance of these findings in and around NASA at the same time it would seem that the Moon has been revealed as being much more useful than had been previously released publicly. NASA's Science Mission Directorate has some explaining to do.