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Nb/Ta, Zr/Hf and REE in the depleted mantle: implications for the differentiation history of the crust–mantle system

✍ Scribed by Stefan Weyer; Carsten Münker; Klaus Mezger


Book ID
117094258
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
364 KB
Volume
205
Category
Article
ISSN
0012-821X

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This paper describes a new type of Nb(Ta)-Zr(Hf)-REE-Ga polymetallic deposit of volcanic origin in the late Permian coal-bearing strata of eastern Yunnan, southwestern China. Well logging data (especially natural gamma-ray), geochemical data (high concentrations of Nb, Ta, Zr, Hf, REE, and Ga) and m