Doctoral Dissertations


"Analyses of the noble gases in samples of iron meteorites are presented which indicate the following: 1. The inclusions of iron meteorites contain noble gases with a wide range of isotopic compositions. 2. The noble gas concentration and isotopic anomalies arc often grossly inhomogeneously distributed within a given inclusion and vary from inclusion to inclusion in a meteorite. 3. Silicate inclusions appear to be the most promising samples for I-Xe and Pu-Xe dating. 4. Graphite and troilite in addition to the silicate inclusion contain significant radiogenic ¹²⁹Xe anomalies. 5. The total I-Xe (and in the case of Toluca silicates total Pu-Xe) formation intervals of most of the iron meteorites studied are approximately equal to the total I-Xe and Pu-Xe formation intervals of chondrites. 6. The absence of radiogenic ¹²⁹Xe in silicate inclusions of the Kodaikanal iron meteorite is consistant with the short Rb-Sr and K-Ar ages of this meteorite. The six points above are interpreted as evidence that iron meteorites were not formed as the molten core of a planetary sized body due to heating and gravitational differentiation of chondritic material. Analyses of stone meteorite data indicate that: 1. The matrix material in addition to the chondrules of stone meteorites are suitable for I-Xe dating. 2. The low temperature data obtained from heating experiments on neutron irradiated meteorites can be used to reconstruct the thermal histories of the stone meteorites. The decay parameters are presented for the following decays: 1. The electron-capture decay of ⁸⁶Rb. 2. The decay of ¹³⁴Cs to ¹³⁴Xe. 3. The double beta-decay of ¹³⁰Te. 4. The xenon and krypton yields from the spontaneous fission of ²⁵²Cf"--Abstract, pages ii-iii.


Manuel, O. (Oliver), 1936-

Committee Member(s)

Hardtke, Fred C.
Webb, William H.
Roach, D. Vincent
Bolter, Ernst



Degree Name

Ph. D. in Chemistry


United States. National Defense and Education Act Title IV Fellowship


University of Missouri--Rolla

Publication Date


Journal article titles appearing in thesis/dissertation

  • Isotopic Anomalies of Krypton and Xenon in Canyon Diablo Graphite
  • Decay of Rb⁸⁶ by Electron Capture
  • On Noble Gas Anomalies in the Great Namaqualand Troilite
  • Xenon in the Inclusions of Canyon Diablo and Toluca Iron Meteorites
  • Noble Gases in Silicate Inclusion of Kodaikanal
  • ¹²⁹I - ¹²⁹Xe Dating of Chondrites
  • Xenon-134 from the Decay of Cesium-134
  • Xenon in Chondrules and Matrix Material of Chondrites
  • Xenon in Kirkland Lake Tellurides
  • Xenon and Krypton from the Spontaneous Fission of Californium - 252
  • The Noble Gas Record in Toluca


vi, 77 pages

Note about bibliography

Includes bibliographical references (pages 32-38).


© 1969 Emmit Calvin Alexander , Jr., All rights reserved.

Document Type

Dissertation - Open Access

File Type




Subject Headings

Gases, Rare -- Analysis
Meteorites, Iron

Thesis Number

T 2355

Print OCLC #


Electronic OCLC #


Included in

Chemistry Commons