"Abundance of noble gases extracted from Fig Tree Shale exhibit a marked deviation from the gas content of eclogitic rocks purported to be mantle material. The abundances of the heavy noble gases in shale were found to exceed the highest known meteoritic values. The abundances of the lighter noble gases were found to be comparable to the abundances of these gases in typical chondrites.
Temperature gradient analyses show that excess heavy gases are released at low temperatures. This is interpreted to indicate a preferential adsorption of the heavy noble gases on fine-grained sediments when these gases were being released from the interior of the earth.
Meteorite-like anomalies were observed in the isotopic composition of xenon released at elevated temperatures. These anomalies include Pasamonte-type fissiogenic xenon (X¹³¹ˉ¹³⁶), an excess of radiogenic Xe¹²⁹ and an apparent deficiency of the heavy isotopes (Xe¹³¹ˉ¹³⁶) in the trapped component.
Results from the temperature analyses showed that the separation of krypton from xenon exceeds the physical mass fractionation observed across the xenon isotopes. This indicates that the relative size or chemical nature of these gases dominates over the mass effect in determining the release pattern of these gases from shale"--Abstract, page ii.
Manuel, O. (Oliver), 1936-
Park, John T.
Webb, William H.
M.S. in Chemistry
National Science Foundation (U.S.)
University of Missouri at Rolla
vi, 42 pages
© 1967 Robert Anthony Canalas, All rights reserved.
Thesis - Open Access
Gases -- Analysis
Xenon -- Isotopes
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Electronic OCLC #
Link to Catalog Record
Canalas, Robert Anthony, "Noble gases in the earth and its atmosphere" (1967). Masters Theses. 6875.