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《Acta Mineralogica Sinica》 2009-04
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Petrology and REE-Trace Element Geochemistry of Bozhushan Granite Pluton in Southeastern Yunnan Province,China

XIE Hong-jing1,2,ZHANG Qian1,ZHU Chao-hui1,2,FAN Liang-wu1,2,WANG Da-peng1,2 ( 1. Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China; 2. Graduate School of Chinese Academy of Sciences,Beijing 100049,China)  
Bozhushan granite comprises two intrusive bodies. The first intrusion is dominated by medium grained biotite monzogranite. Their SiO2 and total alkaline contents are in the ranges of 64. 82% -72. 01% ( average 68. 72% ) and 5. 51% -8. 2% ( average 6. 92% ) ,respectively. The rocks display positive Rb,U,Th,and LREE,and medium strong negative Eu anomalies ( δEu = 0. 37 -0. 55). Most of rocks belong to peraluminous( average A/CNK = 1. 14) granite and generated in syn-collisional setting. The second intrusion mainly consists of fine grained monzogranite,most of which belongs to metaluminous rocks and is characterized by high SiO2( 75. 94% -76. 89% ) and total alkaline ( 7. 58% -8. 82% ). These rocks are enriched in Nb,Ta,Y,and significant depleted in Sr,Ba,and Eu ( δEu = 0. 06 -0. 11). This intrusion is formed in an extensional setting. Compared with the first intrusion,the second is mostly depleted in Ba,Sr,and Eu,indicating the higher evolvement.
【Fund】: 国家重点基础研究发展计划项目(2007CB411408);; 中国科学院重要方向项目(KZCX2-YW-111)
【CateGory Index】: P588.121;P595
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