Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge
The REE compositions of hydrothermal deposits and basalt samples from the Southwest Indian Ridge (SWIR) were determined with ICP-MS.The results show that there are significant differences between different types of samples although all samples show relative LREE enrichment.The contents of REE in hydrothermal sulfides and alterated rocks samples are lower (from 7.036 × 10-6to 23.660×10-6),while those in the white chimney deposits are relatively higher (ranging from 84.496× 10-6 to 103.511× 10-6).Both of them are lower than basalts.Chondrite-normalized REE distribution patterns show that sulfides and alterated rocks samples are characterized by significant positive Eu anomalies.On the contrary,white chimney deposits have obvious negative Eu anomalies,which may be caused by abundant calcite existing in the white chimney samples.Both the content and distribution pattern of REE in sulfides suggest that REE most possibly is originally derived from hydrothermal fluids,but influenced by the submarine reducing ore-forming environment,seawater convection,mineral compositions as well as the constraiut of mineral crystallizations.
rare earth element hydrothermal deposits Southwest Indian Ridge
CAO Zhimin CAO Hong TAO Chunhui LI Jun YU Zenghui SHU Liping
Key Laboratory of Submarine Geosciences and Technology,Ministry of Education,Department of Marine Ge Key Laboratory of Submarine Geosciences and Technology,Ministry of Education,Department of Marine Ge Laboratory of Submarine GeoScience,Second Institute Oceanography,State Oceanic Administration,Hangzh Key Laboratory of Marine Hydrocaobon Resources and Environment Geology MLR,Qingdao Institute of Mari Key Laboratory of Submarine Geosciences and Technology,Ministry of Education,Department of Marine Ge
国内会议
乌鲁木齐
英文
192-199
2011-08-11（万方平台首次上网日期，不代表论文的发表时间）