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Geochemistrical Features and Tectonic Settings of Ladinian Basalts in Gejiu,Yunnan Province

LI Ying-shu1,QIN De-xian1,ZOU Tao1,JIA Fu-ju1,WAN Chao-ying2,SUN Cai-xia3,ZHOU Nian-sheng41.Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China2.Department of Machine & Energy,Shuicheng Iron & Steel Company,Liupanshui,Guizhou 553028,China3.Chuxiong Mineral and Melting Co.Ltd of Yunnan,Chuxiong,Yunnan 675000,China4.Tiangao Group Ltd.of Guangzhou,Guangzhou 510635,China  
Study on geology,geochemistry of the Ladinian basalts in Gejiu,Yunnan Province indicates that these basalts are of blastoamygdaloidal structure and belong to olivineous alkali-basalts and they are of features of unsaturated silicon,of abundant alkali,magnesium and iron and of excessive titanium and low aluminium.The basalts came from high basic magmas of mantle derivation and were formed by low degree of differentiation under a general extension setting in a rift.
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