| REE and Trace Element Geochemistry of Yinachang Fe-Cu-REE Deposit, Yunnan Province, China |
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| 作者姓名： | 杨耀民 涂光炽 胡瑞忠 |
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| 作者单位： | Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China，Graduate School，Chinese Academy of Sciences，Beijing 100039，China，Key Laboratory of Marine Sedimentary and Environmental Geology of State Oceanic Administration，First Institute of Oceanography，State Oceanic Administration，Qingdao 266061，China，Northwest Geological Exploration Bureau，CNNC，Xi’an 710054，China，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | 1IntroductionThebehaviorsoftherare earthelements (REE)duringmagmatism ,metamorphismandmeta somationareofgreatgeologicalinterestbecauseoftheirapplicationsingeochronologyandgeochemi caltracing (e .g .reviewsbyFaure ,1 986;LipinandMckay ,1 989) .Becauseoftheirsimilargeo chemicalbehaviorsandlowsolubilitiesinwater,theREEshaveprovedthemselvestobeapowerfultoolforthecharacterizationofprovenanceswhenappliedtosedimentaryrocks (McDanieletal.,1 994) .Althoughtheirbehaviorsunderhydrothermalconditionsar…
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| 关 键 词： | 稀土元素氧化物 蒸发水疗法 铕异常 LREE 地球化学 丰度 |
REE and trace element geochemistry of Yinachang Fe-Cu-REE deposit,Yunnan Province,China |
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| Yang?Yaomin,Hu?Ruizhong.REE and Trace Element Geochemistry of Yinachang Fe-Cu-REE Deposit, Yunnan Province, China[J].Chinese Journal of Geochemistry,2004,23(3):265-274. |
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| Authors: | Yang Yaomin Hu Ruizhong |
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| Institution: | (1) Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Graduate School, Chinese Academy of Sciences, 100039 Beijing, China;(3) Key Laboratory of Marine Sedimentary and Environmental Geology of State Oceanic Administration, First Institute of Oceanography, State Oceanic Administration, 266061 Qingdao, China;(4) Northwest Geological Exploration Bureau, CNNC, 710054 Xi’an, China |
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| Abstract: | REE and other trace elements in ores, wall rocks, alkaline volcanic rocks and diabase dikes have been determined in the Yinachang Fe-Cu-REE deposit. Comparative studies of REE and trace element geochemical characteristics of these geological bodies indicate that the ores and alkaline volcanic rocks contain abundant REE and Y (65.9-4633)×10-6, with higher abundances of As, Mo, Nb, Co and U than those of the crust. Their chondrite-normalized patterns show a strong enrichment of LREE and a positive Eu anomaly, in contrast to those of the dolomites which are characterized by slight LREE enrichment and moderate negative Eu anomaly. The REE patterns of ores are similar to those of hydrothermal sediment cores in the East Pacific Rise, whereas the REE patterns of dolomites are similar to those of PAAS (Post-Archean Average Shale). In combination with the geological setting of the deposit, the primary ore-forming fluids might have higher REE and volatile elements, and might have been derived from mantle degassing, or the alkaline volcanic magmas. The Yinachang Fe-Cu-REE ore deposit is considered to be of volcanic exhalation-hydrothermal sedimentary origin. |
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| Keywords: | rare-earth elements exhalation-hydrothermal positive Eu anomaly LREE enrichment Fe-Cu-REE deposit |
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