YAN Zai-fei1, CHENG Li-jun2, WANG Hong-tu3, CHENG Mi1,4, ZHOU Jia-xi1,4
(1. State Key Laboratory of Ore Deposits Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
2. Institute of Geology and Mine of Chongqing, Chongqing 400042, China ;
3. College of Resources and Environment, Chongqing University, Chongqing 400030, China;
4. Graduate School of Chinese Academy of Sciences, Beijing 10039, China)
Abstract: Variations of high-field strength element (HFSE) of the Ertan High-Ti basalts in the Emeishan suggest that Zr/Hf ratios were fractionated. According to the fractionation, the Ertan High-Ti basalts can be devided into high Zr/Hf group and low Zr/Hf group based on Zr/Hf ratios. The fractionation of Zr/Hf is not related with crystallization of basaltic magmas but partial melting and distinct compositions of mantle. This implies that high Zr/Hf basalt and low Zr/Hf basalt possessed distinct compositions of mantle and underwent different surroundings of partial melting, respectively.
Key words: high-Ti basalt; high-field strength element; partial melting; heterogeneity
E-mail: zaifeiyan78@hotmail.com
ACTA MINERALOGICA SINICA Vol. 31, No. 1, 2011, Page 36-42
