PRIMITIVE LEAD FROM IRON METEORITES

Technical Report · Fri Feb 01 04:00:00 EST 1963

OSTI ID:4119151

Marshall, R R; Feitknecht, J

Isotepic analyses show that the Odessa iron meteorite, as well as the Toluca iron meteorite, contains the primeval lead that was first discovered in the trollite obtained from the Canyon Diablo and Henbury iron meterites. However, significant variations of isotepic ratios occur within all these meteorites. Lead from samples of the Odessa meteorite has unusually large amounts of Pb/sup 206/ that increase with the bismuth content. Nuclear synthesis may account for the differences in isotopic composition found in diiferent samples of this meteorite. There is no suggestion of transitions towards the radiogenic type of lead observed in some iron meteorites (including Toluca). Within ths limits of error, the sampls of the Pinon nickel-rich ataxite conhained no detectable lead. This result corroborates independent measurements that indicate that Ihis type of iron msteorite contains at the most only a few hundredths' ppm of lead. Octahedrites, on the other hand, may contain as much as 0.25 ppm of lead. (auth)

• Research Organization: CAligfornia Inst. of TEch., PAsadena. Jet Propulsion LAb.
• NSA Number: NSA-18-005897
• OSTI ID: 4119151
• Report Number(s): JPL-TR-32-371
• Country of Publication: United States
• Language: English

Related Subjects

ASTROPHYSICS
BISMUTH
ERRORS
IRON
ISOTOPES
LEAD
LEAD 206
MEASURED VALUES
METEORITES
NICKEL
PHYSICS
PRODUCTION
QUANTITY RATIO
RADIOISOTOPES
THERMONUCLEAR REACTIONS