In all geologic time, the responsibilities are on our generation ... including you ...

Powdery Texture (Helps in Mining and Mineral Processing)

One of the benefits of dealing with lunar material is that it's powdery on the surface. Indeed, the astronauts compared it to ash. Look at how fine the imprints of their sunken footprints are.

The reason for this is the lack of any shielding atmosphere, which has allowed meteorites, micrometeorites and solar and cosmic radiation to bombard the surface over the eons, pulverizing it into powder. Typically, the thickness of the powder is 2 to 10 meters in the lowlands, and 100s to 1000s of meters (kilometers) in the highlands, the highlands consisting of piles of crater ejecta.

Since the surface of the Moon has been unchanged by any geologic activity for 3+ billion years, we see the accumulated effects of 3+ billion years of meteorite bombardment and pulverization.

As a NASA report summarizes: "The fragmented material consists of as much as 25% by weight under 20 micrometers in diameter [i.e., one fiftieth of a millimeter!], and more than 70% under 150 micrometers in size [i.e., one seventh of a millimeter]. Approximately 90% by weight of the lunar soil consists of particles under 1 millimeter in size." It's more powdery in some places than in others.

The material properties of lunar soil are discussed further in the section on mining.






You are currently on this page:

PERMANENT.com > Lunar Resources (Mining The Moon) > Origin and Composition > Powdery Texture



  Facebook page starting in 2012:  


To get updates on PERMANENT (occasional, not frequent), get on our mailing list.

For general or specific e-mail regarding PERMANENT, please use our Feedback page.

Leave information about yourself in our people, companies, and organizations database.

If you are interested in hiring our expertise, anywhere in the world, please contact us.
We have people in the USA and Thailand, and can travel or consult by internet.
You can call anytime, 24/7, at +66-8-1135-7977

Text by Mark Prado, Copyright © 1983-2013, All Rights Reserved.
Many website artistic design elements by Sam Fraser, Copyright © 1999-2013, All Rights Reserved.

Except where specifically stated otherwise,
Copyright © 1983-2013 by Mark Evan Prado, All Rights Reserved

Source: http://www.permanent.com

PERMANENT logo
P rojects to E mploy R esources of the M oon and A steroids N ear E arth in the N ear T erm

Menu:
please see our

Site Map

to navigate.

For PC's, this righthand
side has a floating menu,
but if your tablet
or your PC's web browser
do not run
-- javascript --
then you must
-- navigate --
using the Site Map above.