Contrast in the isotopic composition of oxygen and carbon between the Mud Tank Carbonatite and the marbles in the granulite terrane of the Strangways Range, central Australia
作者:
AllanF. Wilson,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1979)
卷期:
Volume 26,
issue 1-2
页码: 39-44
ISSN:0016-7614
年代: 1979
DOI:10.1080/00167617908729065
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Three samples from the Mud Tank Carbonatite have very similar isotopic ratios, averaging δ13C=‐4.3 and δ18O=+7.5(SMOW). These isotope values are distinct from those of nearby highly metamorphosed Carpentarian marbles, which have marine limestone values of δ13C=‐1.3±0.5, and δ18O=+17.6+0.7 with n=11. Minor variations in the values for the normal marbles show no correlation with stratigraphy or geographic location; however, somewhat lighter oxygen is found in some other marbles known to be affected by low‐temperature fluids within the Woolanga Lineament. Isotopes of C and O, if discretely used in conjunction with other geochemical features, not only may discriminate between deep‐seated carbona‐tites and marbles, but may also help to identify zones of carbonate metasomatism and define the isotopic characters of the fluids.
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