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Mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the PACMANUS hydrothermal field, Eastern Manus Basin

The mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the dacite-hosted PACMANUS hydrothermal field were analyzed. The samples are poorly crystallized Si-Fe-Mn oxyhydroxides with minor birnessite, todorokite, nontronite, goethite, and opal-A. There are some microtex... Full description

Journal Title: Science China Earth Sciences 2012, Vol.55(12), pp.2039-2048
Main Author: Zeng, ZhiGang
Other Authors: Chen, Shuai , Wang, XiaoYuan , Ouyang, HeGen , Yin, XueBo , Li, ZhaoXue
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1674-7313 ; E-ISSN: 1869-1897 ; DOI: 10.1007/s11430-012-4536-7
Link: http://dx.doi.org/10.1007/s11430-012-4536-7
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recordid: springer_jour10.1007/s11430-012-4536-7
title: Mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the PACMANUS hydrothermal field, Eastern Manus Basin
format: Article
creator:
  • Zeng, ZhiGang
  • Chen, Shuai
  • Wang, XiaoYuan
  • Ouyang, HeGen
  • Yin, XueBo
  • Li, ZhaoXue
subjects:
  • Si-Fe-Mn oxyhydroxide
  • nontronite
  • microbe
  • PACMANUS hydrothermal field
  • Eastern Manus Basin
ispartof: Science China Earth Sciences, 2012, Vol.55(12), pp.2039-2048
description: The mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the dacite-hosted PACMANUS hydrothermal field were analyzed. The samples are poorly crystallized Si-Fe-Mn oxyhydroxides with minor birnessite, todorokite, nontronite, goethite, and opal-A. There are some microtextures which are rather like fossil microbes such as the filamentous silica and the hollow pipes. Flakes of nontronite crystals are found either forming a honeycomb texture or distributed on the surface of the hollow pipes. Nontronite is the product precipitated from low-temperature hydrothermal fluids, and microbes may play a role in its formation. Si-Fe-Mn oxyhydroxides have two kinds of nuclei: Si-Mn nuclei and Si nuclei, both enveloped by the similar Si-Fe outer layer, existing in the rod-shaped oxyhydroxide and spheroidal oxyhydroxide, respectively. In the Si-Mn nuclei, the concentration of SiO 2 is between 39.32 wt% and 86.31 wt%, and MnO concentration is between 4.97 wt% and 27.01 wt%, but Fe 2 O 3 concentration is very low (0.54 wt%–3.43 wt%). In the Si nucleus the concentration of SiO 2 is 90.17 wt%, but concentration of MnO and Fe 2 O 3 are low, with 0.06 wt% and 3.47 wt%, respectively. The formation of the Si-Mn nucleus is closely related to microbes, whereas the Si nucleus is of inorganic origin.
language: eng
source:
identifier: ISSN: 1674-7313 ; E-ISSN: 1869-1897 ; DOI: 10.1007/s11430-012-4536-7
fulltext: fulltext
issn:
  • 1869-1897
  • 18691897
  • 1674-7313
  • 16747313
url: Link


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titleMineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the PACMANUS hydrothermal field, Eastern Manus Basin
creatorZeng, ZhiGang ; Chen, Shuai ; Wang, XiaoYuan ; Ouyang, HeGen ; Yin, XueBo ; Li, ZhaoXue
ispartofScience China Earth Sciences, 2012, Vol.55(12), pp.2039-2048
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subjectSi-Fe-Mn oxyhydroxide ; nontronite ; microbe ; PACMANUS hydrothermal field ; Eastern Manus Basin
descriptionThe mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the dacite-hosted PACMANUS hydrothermal field were analyzed. The samples are poorly crystallized Si-Fe-Mn oxyhydroxides with minor birnessite, todorokite, nontronite, goethite, and opal-A. There are some microtextures which are rather like fossil microbes such as the filamentous silica and the hollow pipes. Flakes of nontronite crystals are found either forming a honeycomb texture or distributed on the surface of the hollow pipes. Nontronite is the product precipitated from low-temperature hydrothermal fluids, and microbes may play a role in its formation. Si-Fe-Mn oxyhydroxides have two kinds of nuclei: Si-Mn nuclei and Si nuclei, both enveloped by the similar Si-Fe outer layer, existing in the rod-shaped oxyhydroxide and spheroidal oxyhydroxide, respectively. In the Si-Mn nuclei, the concentration of SiO 2 is between 39.32 wt% and 86.31 wt%, and MnO concentration is between 4.97 wt% and 27.01 wt%, but Fe 2 O 3 concentration is very low (0.54 wt%–3.43 wt%). In the Si nucleus the concentration of SiO 2 is 90.17 wt%, but concentration of MnO and Fe 2 O 3 are low, with 0.06 wt% and 3.47 wt%, respectively. The formation of the Si-Mn nucleus is closely related to microbes, whereas the Si nucleus is of inorganic origin.
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titleMineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the PACMANUS hydrothermal field, Eastern Manus Basin
descriptionThe mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the dacite-hosted PACMANUS hydrothermal field were analyzed. The samples are poorly crystallized Si-Fe-Mn oxyhydroxides with minor birnessite, todorokite, nontronite, goethite, and opal-A. There are some microtextures which are rather like fossil microbes such as the filamentous silica and the hollow pipes. Flakes of nontronite crystals are found either forming a honeycomb texture or distributed on the surface of the hollow pipes. Nontronite is the product precipitated from low-temperature hydrothermal fluids, and microbes may play a role in its formation. Si-Fe-Mn oxyhydroxides have two kinds of nuclei: Si-Mn nuclei and Si nuclei, both enveloped by the similar Si-Fe outer layer, existing in the rod-shaped oxyhydroxide and spheroidal oxyhydroxide, respectively. In the Si-Mn nuclei, the concentration of SiO 2 is between 39.32 wt% and 86.31 wt%, and MnO concentration is between 4.97 wt% and 27.01 wt%, but Fe 2 O 3 concentration is very low (0.54 wt%–3.43 wt%). In the Si nucleus the concentration of SiO 2 is 90.17 wt%, but concentration of MnO and Fe 2 O 3 are low, with 0.06 wt% and 3.47 wt%, respectively. The formation of the Si-Mn nucleus is closely related to microbes, whereas the Si nucleus is of inorganic origin.
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titleMineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the PACMANUS hydrothermal field, Eastern Manus Basin
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abstractThe mineralogical and micromorphological characteristics of Si-Fe-Mn oxyhydroxides from the dacite-hosted PACMANUS hydrothermal field were analyzed. The samples are poorly crystallized Si-Fe-Mn oxyhydroxides with minor birnessite, todorokite, nontronite, goethite, and opal-A. There are some microtextures which are rather like fossil microbes such as the filamentous silica and the hollow pipes. Flakes of nontronite crystals are found either forming a honeycomb texture or distributed on the surface of the hollow pipes. Nontronite is the product precipitated from low-temperature hydrothermal fluids, and microbes may play a role in its formation. Si-Fe-Mn oxyhydroxides have two kinds of nuclei: Si-Mn nuclei and Si nuclei, both enveloped by the similar Si-Fe outer layer, existing in the rod-shaped oxyhydroxide and spheroidal oxyhydroxide, respectively. In the Si-Mn nuclei, the concentration of SiO 2 is between 39.32 wt% and 86.31 wt%, and MnO concentration is between 4.97 wt% and 27.01 wt%, but Fe 2 O 3 concentration is very low (0.54 wt%–3.43 wt%). In the Si nucleus the concentration of SiO 2 is 90.17 wt%, but concentration of MnO and Fe 2 O 3 are low, with 0.06 wt% and 3.47 wt%, respectively. The formation of the Si-Mn nucleus is closely related to microbes, whereas the Si nucleus is of inorganic origin.
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pubSP Science China Press
doi10.1007/s11430-012-4536-7
pages2039-2048
date2012-12