Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge

CAO Zhimin; CAO Hong; TAO Chunhui; LI Jun; YU Zenghui; SHU Liping

doi:10.1007/s13131-012-0192-1

Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge

doi: 10.1007/s13131-012-0192-1

1.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Hydrocaobon Resources and Environment Geology MLR, Qingdao Institute of Marine Geology, Qingdao 266071, China
3.
Laboratory of Submarine GeoScience, Second Institute Oceanography, State Oceanic Administration, Hangzhou 310012, China
4.
Key Laboratory of Marine Hydrocaobon Resources and Environment Geology MLR, Qingdao Institute of Marine Geology, Qingdao 266071, China
5.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China;Petrology of the Oceanic Crust, Geosciences Department, University of Bremen, Bremen 28359, Germany

基金项目: The National Natural Science Foundation of China under contract No. 40872063.

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出版历程
- 收稿日期: 2011-05-06
- 修回日期: 2011-10-20

Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge

1.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Hydrocaobon Resources and Environment Geology MLR, Qingdao Institute of Marine Geology, Qingdao 266071, China
3.
Laboratory of Submarine GeoScience, Second Institute Oceanography, State Oceanic Administration, Hangzhou 310012, China
4.
Key Laboratory of Marine Hydrocaobon Resources and Environment Geology MLR, Qingdao Institute of Marine Geology, Qingdao 266071, China
5.
Key Laboratory of Submarine Geosciences and Technology, Ministry of Education, Department of Marine Geoscience, Ocean University of China, Qingdao 266100, China;Petrology of the Oceanic Crust, Geosciences Department, University of Bremen, Bremen 28359, Germany

摘要

摘要: 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^-6 to 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 constraint of mineral crystallizations.
- rareearthelement /
- hydrothermaldeposits /
- SouthwestIndianRidge
Abstract: 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^-6 to 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 constraint of mineral crystallizations.
- rare earth element /
- hydrothermal deposits /
- Southwest Indian Ridge

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文章访问数: 336
HTML全文浏览量: 53
PDF下载量: 160
被引次数: 0

Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge

doi: 10.1007/s13131-012-0192-1

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出版历程

Rare earth element geochemistry of hydrothermal deposits from Southwest Indian Ridge

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出版历程

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