• journal_title：Geological Magazine
• Contributor：LEI ZHANG ; BAO-FU HAN ; JIA-FU CHEN ; ZHAO XU
• Publisher：Cambridge University Press
• Date：2012-
• Format：text/html
• Language：en
• Identifier：10.1017/S0016756811000860
• journal_abbrev：Geological Magazine
• issn：0016-7568
• volume：149
• issue：4
• firstpage：645
• section：Original Articles

In Northeast China, large volumes of Mesozoic–Cenozoic igneous rocks have developed as a result of long-lasting subduction of the palaeo-Pacific and Pacific plates beneath the eastern Eurasian continent. Previous studies have convincingly confirmed the presence of depleted mantle (DM), FOcal ZOne (FOZO) mantle and enriched mantle 1 (EM1) end-members; the enriched mantle 2 (EM2) end-member is probably present but it has been poorly constrained. The Late Cretaceous Shuangyashan suite, comprising a monzogabbro and diorite–porphyrite stocks and their cumulate hornblendite enclaves, from the Shuangyashan coal basin, Northeast China, is characterized by high initial ⁸⁷Sr/⁸⁶Sr (0.70922–0.71095) and low initial ¹⁴³Nd/¹⁴⁴Nd ratios (0.51221–0.51238) at 98 Ma. Their occurrence demonstrates that EM2 is present in the lithospheric mantle of Northeast China and its formation may be related to recycled continental material in a subduction setting.