Volatile metal deposits on lunar soils: relation to volcanism. [Mechanisms]
Conference
·
OSTI ID:7311890
Parallel leaching and volatilization experiments conducted on lunar samples and similar experiments on sphalerite do not supply the information needed to resolve the question of the chemical nature of /sup 204/Pb, Zn, Bi and Tl deposits on lunar soil surfaces. It is proposed that in Apollo 17 mare and terra soils and fractions of /sup 204/Pb, Zn and Tl that are insoluble under mild, hot pH 5 HNO/sub 3/, leaching conditions and involatile at 600/sup 0/C were originally surface deposits which became immobilized by migration into the silicate substrate or by chemisorption. Only Bi is predominantly indigenous. The implication is also that the soils over their respective times of evolution were exposed to heavy metal vapors or that an episodic exposure occurred after they had evolved. A sequence of events is proposed to account for orange 74220 and black 74001 glasses by lava fountaining and for soil 74241 as tephra from an explosive volcanic eruption.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7311890
- Report Number(s):
- CONF-770322-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Closer look at lunar volcanism
Lunar volcanism in space and time
Proceedings of a workshop on Lunar Volcanic Glasses: Scientific and Resource Potential
Conference
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:6094570
Lunar volcanism in space and time
Journal Article
·
Sat May 01 00:00:00 EDT 1976
· Rev. Geophys. Space Phys.; (United States)
·
OSTI ID:7155777
Proceedings of a workshop on Lunar Volcanic Glasses: Scientific and Resource Potential
Conference
·
Wed Aug 01 00:00:00 EDT 1990
·
OSTI ID:6417103