| Geochemical Characteristics of Volcanic Rocks of the Laochang Ag Polymetallic Deposit,Lancang,Yunnan Province,China |
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| 作者姓名： | 刘友梅 杨蔚华 陈多福 |
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| 作者单位： | GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Wushan,Guangzhou510640,China |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目 |
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| 摘 要： | In terms of major element, trace element and REE geochemical characteristics ofvolcanic rocks in the area studied and by making use of the TiO2-K2O-P2O5,The-Hf-Ta and Zr-Nb-Y trianglar diagrams and the environmental discrimination diagrams of incompatible ele-ment distribution pattems,the authors have drawn some conclusions that are different from those by previous workers.It is concluded that volcanic rocks in the Laochang Ag polymetallic deposit at Lancang,Yunnan belong to continental within-plate alkali basalts, and that their geotectonic setting seems to be at the northeastern margin of East Gondwana Land.
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| 关 键 词： | 地球化学特征 火山岩 银多金属矿床 铅同位素 云南 稀土元素 |
Geochemical characteristics of volcanic rocks of the Laochang Ag polymetallic deposit,Lancang, Yunnan Province,China |
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| Liu Youmei,Yang Weihua,Chen Duofu.Geochemical Characteristics of Volcanic Rocks of the Laochang Ag Polymetallic Deposit,Lancang,Yunnan Province,China[J].Chinese Journal of Geochemistry,2002,21(3):266-273. |
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| Authors: | Liu Youmei Yang Weihua Chen Duofu |
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| Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Wushan, Guangzhou, China |
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| Abstract: | In terms of major element, trace element and REE geochemical characteristics of volcanic rocks in the area studied and by making use of the TiO2-K2O-P2O5, Th-Hf-Ta and Zr Nb-Y trianglar diagrams and the environmental discrimination diagrams of incompatible element distribution patterns, the authors have drawn some conclusions that are different from those by previous workers. It is concluded that volcanic rocks in the Laochang Ag polymetallic deposit at Lancang, Yunnan belong to continental within-plate alkali basalts, and that their geotectonic setting seems to be at the northeastern margin of East Gondwana Land. |
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| Keywords: | geochemical characteristics volcanic rock Laochang Ag polymetallic deposit |
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