REE Geochemistry Characteristics of Stratigraphic Samples in the Abalieke Region, Western Kunlun----Institute of Geochemistry Chinese Academy of Sciences

SHEN Neng-ping¹ , ZHANG Zheng-w ei¹ , PENG Jian-tang¹ , XIAO Jia-fei¹ , ZHU Xiao-qing¹ , YOU Fu-hua^{1, 2} , ZHANG Zhong-shan^{1, 2} , WANG Fu-dong^{1, 2}
(1. State Key Laboratory of Ore Deposit Geochemistry , Institute of Geochemistr y , Chinese Academy of Sciences, Guiy ang 550002, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract:　 The Abalieke region locats in the central sect ion of the western Kunlun polymetallic ( Pb, Zn, Cu, etc) ore belt, an area w ith major potential for further base met al deposit discoveries. This paper report s REE dat a for 82 samples from 8 stratigraphic sections for Huoshilafu formation in the Abalieke region. To att empt to solve the origin of ore-forming materials using REE geochemistry. Although total REE content s are quite variable ( ∑REE=7.52x10^{- 6}~ 220.70x10^{- 6}, ∑LREE=5. 82 x10^{- 6}~198.46 x10^-6, ∑HREE =1.49 X10- 6 ~ 32. 74x10^{- 6} and Y = 4. 77x10^{- 6}~ 91. 30x10^- ⁶) , chondrite-normalized REE patterns of the majorit y of samples are uniformly LREE-riched (averaging ∑LREE/ ∑HREE = 6. 57) , with remarkably fractionation of LREE and HREE [ averaging ( La/ Yb) _N= 8. 20] , slightly negative Eu anomalies ( averaging δEu= 0.77) and insignificant Ce anomalies (averaging δCe = 0. 88). The result s demonstrate that REE characteristics of stratigraphic samples from Abalieke region are similar to those of rock and ore samples from other representative deposits (Tiekelike, Tamu, Kalangu, Tuokuziate) in the western Kunlun polymetallic ore belt , which indicate a close genetic relationship between the ore-forming materials and the host strata for the majority of deposits in this belt.