Missing Water on Mars: Hydrated Crust Minerals May Explain

  • Thread starter Thread starter BillTre
  • Start date Start date
  • Tags Tags
    Mars Water
AI Thread Summary
The discussion highlights that the solar wind's role in removing water from Mars accounts for only a fraction of the water believed to have existed on the planet. This conclusion is supported by the deuterium to hydrogen (D/H) ratio observed in Martian hydrogen. Alternative theories suggest that a significant amount of water may be stored in hydrated minerals within the Martian crust. This concept parallels findings on Earth, where about half of the ocean's volume is thought to be contained in crustal minerals. However, unlike Earth, Mars lacks tectonic processes that recycle these minerals, implying that water in Martian hydrated minerals may be permanently trapped. The implications of these findings are discussed in a Science magazine article and a related research paper.
BillTre
Science Advisor
Gold Member
2024 Award
Messages
2,670
Reaction score
11,543
TL;DR Summary
Mars used to be wet, but is now dry.
The usual explanation is that the water was blown off, like the atmosphere, by the solar wind, after the planetary magnetic field went away (aided by Mars's lower that earth gravity).
Additional water may be stored, hydrated in minerals of Mars's crust.
The solar wind driven removal of water from Mars can only explain a portion of the water thought to have once existed there.

This process, indicated by the D/H ratio of normal hydrogen to its heavier form (deuterium) of Martian hydrogen, can only a count for the lower estimates of Martian water volumes.
Among alternative explanations, is a proposal that much water is tied up in hydrated minerals in rock of the crust.
Science mag news article.
Science research paper. (maybe open access, I can't tell)

Hydration of rocks in the crust is well known on earth. On earth, it has been proposed that 1/2 of the volume of the current oceans is tied up in crust minerals. Near surface hydrated Earth minerals are recycled into mantle rocks, by processes driving plate tectonics. This liberates some of the water bound to subducting minerals as volcanic gases.
This is not a process that goes on on Mars, indicating water in hydrated minerals might be irreversably trapped there on Mars.

Picture of their model:
Screen Shot 2021-04-05 at 11.21.15 AM.png

Screen Shot 2021-04-05 at 11.20.54 AM.png
 
  • Informative
Likes pinball1970
On August 10, 2025, there was a massive landslide on the eastern side of Tracy Arm fjord. Although some sources mention 1000 ft tsunami, that height represents the run-up on the sides of the fjord. Technically it was a seiche. Early View of Tracy Arm Landslide Features Tsunami-causing slide was largest in decade, earthquake center finds https://www.gi.alaska.edu/news/tsunami-causing-slide-was-largest-decade-earthquake-center-finds...
Hello, I’m currently writing a series of essays on Pangaea, continental drift, and Earth’s geological cycles. While working on my research, I’ve come across some inconsistencies in the existing theories — for example, why the main pressure seems to have been concentrated in the northern polar regions. So I’m curious: is there any data or evidence suggesting that an external cosmic body (an asteroid, comet, or another massive object) could have influenced Earth’s geology in the distant...

Similar threads

Replies
6
Views
3K
Replies
18
Views
7K
Replies
5
Views
4K
Replies
1
Views
4K
Replies
6
Views
3K
Replies
2
Views
3K
Back
Top