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Volume 18 Issue 2
Apr 2007
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郑建斌, 曹志敏, 安伟. Mineral Components, Texture, and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise at 9o-10oN. Journal of Earth Science, 2007, 18(2).
Citation: 郑建斌, 曹志敏, 安伟. Mineral Components, Texture, and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise at 9o-10oN. Journal of Earth Science, 2007, 18(2).

Mineral Components, Texture, and Forming Conditions of Hydrothermal Chimney on the East Pacific Rise at 9o-10oN

  • Received Date: 15 Jul 2018
  • Rev Recd Date: 15 Jul 2018
  • Publish Date: 15 Jul 2018
  • TocharacterizethehydrothermalprocessesofEastPacificriseat9o–10oN,sulfidemineralcompositions,textural,andgeochemicalfeaturesofchimneyoreswerestudiedusingoremicroscope,scanningelectronmicroscope,X-raydiffractionanalysis,andelectronmicroprobetechniques.Resultsshowthattherearethreemineralassemblagesforthehydrothermalchimneyores,namely:(i)anhydrite+marcasite+pyrite,(ii)pyrite+sphalerite+chalcopyrite,and(iii)chalcopyrite+bornite+digenite+covellite.Mineralassemblages,zonationalfeatures,andgeochemicalcharacteristicsoftheoremineralsindicatethatorefluidtemperaturechangedfromlowtohighthentolowwithamaximumtemperatureupto400℃.Thechimneyisatypicalblacksmoker.Theinitialstructureofthechimneywasformedbytheprecipitationofanhydrites,andlaterthesulfidesbegantoprecipitateintheinnerwall.

     

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