EMI signature from within the post-Archaean subcontinental lithospheric mantle

Isotopic evidence from the potassic volcanic rocks in NE China

Ming Zhang, Paul Suddaby, Martin A. Menzies, Matthew F. Thirlwall

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Combined geological and geochemical evidence suggests that the age of the basement through which the Wudalianchi, Erkeshan, and Keluo (WEK) volcanic rocks in NE China were erupted is post-Archaean. Sr, Nd, and Pb isotope analyses demonstrate that the Miocene to Recent WEK potassic volcanic rocks were derived from an enriched mantle source which had been metasomatised during the Proterozoic. The primary potassic magmas are the products of partial melting of either this enriched mantle source or, more probably, a mixture of this enriched source with an OIB source. In either case, a post-Archaean subcontinental lithospheric mantle with an EM1 signature has made a significant contribution to the WEK potassic rocks.

Original languageEnglish
Pages (from-to)387-398
Number of pages12
JournalGEOCHEMICAL JOURNAL
Volume25
Issue number5
DOIs
Publication statusPublished - 1991
Externally publishedYes

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