收稿日期: 1995-12-12
修回日期: 1996-03-04
网络出版日期: 1996-09-01
CARBON ISOTOPES IN MANTLE
Received date: 1995-12-12
Revised date: 1996-03-04
Online published: 1996-09-01
储雪蕾 . 地慢的碳同位素[J]. 地球科学进展, 1996 , 11(5) : 446 -452 . DOI: 10.11867/j.issn.1001-8166.1996.05.0446
Recently,many carbon isotopic investigations for the mantle samples,such as diamond,kimberlites,carbonatites,oceanic basalts and mantle xenoliths,have shown that a very concentrated distribution is around -5‰,and a relatively weak distribution is from about -15‰ to -25‰ in the mantle carbon isotopes.This type of carbon isotopic distributions is difficult to explain by the current hypotheses,such as phase transformation of carboniferous matters,subduction of sedimentary carbon or mantle degassing,and so it is possible that the primordial mantle is heterogeneous in carbon isotopes.
Key words： Mantle; Carbon isotopes; Heterogeneity
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